the power point presentation is all about steel and its all information, its basic introduction, manufacture, types, advantages, disadvantages, market forms, defects and its market rate.
Iron: A strong, hard magnetic silvery-grey metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel.
Steel: A hard, strong grey or bluish-grey alloy of iron with carbon and usually other elements, used as a structural and fabricating material.
Steel - used as a building material. What is steel - history, manufacturing, production, basic oxygen process, steel companies , cost, type of steel, heat treatment, grades of steel and examples
the power point presentation is all about steel and its all information, its basic introduction, manufacture, types, advantages, disadvantages, market forms, defects and its market rate.
Iron: A strong, hard magnetic silvery-grey metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel.
Steel: A hard, strong grey or bluish-grey alloy of iron with carbon and usually other elements, used as a structural and fabricating material.
Steel - used as a building material. What is steel - history, manufacturing, production, basic oxygen process, steel companies , cost, type of steel, heat treatment, grades of steel and examples
STEEL - As a Building material:
A 20-minute brief presentation on STEEL for a seminar session.
This presentation covers the areas of :
Origin of Steel, Discovery of STEEL, History of steel making, Classification of STEEL , Properties of steel, Mild Steel , Characteristic tension test curve, Medium Carbon Steel, High Carbon Steel, TOR Steel, Manufacturing processes.
Why STEEL is preferred to concrete?
Disadvantages of STEEL
Some Important Steel Structures
STEEL - As a Building material:
A 20-minute brief presentation on STEEL for a seminar session.
This presentation covers the areas of :
Origin of Steel, Discovery of STEEL, History of steel making, Classification of STEEL , Properties of steel, Mild Steel , Characteristic tension test curve, Medium Carbon Steel, High Carbon Steel, TOR Steel, Manufacturing processes.
Why STEEL is preferred to concrete?
Disadvantages of STEEL
Some Important Steel Structures
A stone furniture!Not like the crudely shaped rocks found in the wilderness, but a well-planned and carefully cut stones preserving their natural looks but still comfortable as furniture. Other options are to use them as kitchen and bathroom countertops, flooring tiles, wall claddings, stone fountains, seating wall, fireplaces, swimming yards, etc.
it contains the basic information about the shear force diagram which is the part of the Mechanics of solid. there many numerical solved and whivh will give you detaild idea in S.f.d.
EU: Pig Iron and Spiegeleisen – Market Report. Analysis and Forecast to 2020IndexBox Marketing
IndexBox Marketing has just published its report: “EU: Pig Iron and Spiegeleisen - Market Report. Analysis And Forecast To 2020”. This report focuses on the EU pig iron market, providing a comprehensive analysis and the most recent data on its market size and volume, EU trade, price dynamics, domestic production, and turnover in the industry. The market trends section reveals the main issues and uncertainties concerning the industry, while the medium-term outlook uncovers market prospects. The attractivity index (IB Index) summarizes the source of existing opportunities as they appear in this market, as well as an interpretation of the trade figures.
its about iron metal used in architect used and its advantage and disadvantage ,fire proofing floor, samples, history and discovery of iron metal from earth crust,introduction, physical properties and chemical proerties.
This slide show accompanies the learner guide "Mechanical Technology Grade 10" by Charles Goodwin, Andre Lategan & Daniel Meyer, published by Future Managers Pty Ltd. For more information visit our website www.futuremanagers.net
Steel is an alloy of iron and a number of other elements, mainly carbon, that has a high tensile strength and relatively low cost.
Steel is one of the most sustainable construction materials. Its strength and durability coupled to its ability to be recycled, again and again, without ever losing quality make it truly compatible with long term sustainable development.
The versatility of steel gives architects the freedom to achieve their most ambitious visions.
High carbon steel
Mild steel
Medium carbon steel
Stainless steel
high steel
Cobalt steel
Nickel chromium
Aluminium steel
Chromium steel
At its narrow upper end it has an opening through which the iron to be treated is introduced and the finished product is poured out
The wide end, or bottom, has a number of perforations through which the air is forced upward into the converter during operation.
As the air passes upward through the molten pig iron, impurities such as silicon, manganese, and carbon unite with the oxygen in the air to form oxides; the carbon monoxide burns off with a blue flame and the other impurities form slag.
HOSPITAL
A hospital is a health care institution providing patient treatment by specialized staff and equipment..
Hospitals are usually funded by the public sector, by health organizations (for profit or nonprofit), health insurance companies, or charities, including direct charitable donations.
Historically, hospitals were often founded and funded by religious orders or charitable individuals and leaders.
Today, hospitals are largely staffed by professional physicians, surgeons, and nurses, whereas in the past, this work was usually performed by the founding religious orders or by volunteers.
Hospitals vary widely in the services they offer and therefore, in the departments (or "wards") they have. They may have acute services such as an emergency department or specialist trauma centre, burn unit, surgery, or urgent care. These may then be backed up by more specialist units such as:
Emergency department
Cardiology
Intensive care unit
Pediatric intensive care unit
Neonatal intensive care unit
Cardiovascular intensive care unit
Neurology
Oncology
Obstetrics and gynecology
Adolescent medicine Allergy/Immunology Anesthesia
Cardiac Surgery
Center for Communication Enhancement Critical Care medicine
Dentistry
Dermatology
Division of Developmental medicine Division of Developmental medicine Emergency medicine
Endocrinology Gastroenterology/Nutrition.
General Pediatrics
Genetics
Gynecology
Infectious Diseases
Nephrology
Neurology
Neurosurgery
Newborn medicine
Ophthalmology
Otolaryngology and Communication Enhancement Plastic and Oral Surgery Psychiatry
Pulmonary and Respiratory Diseases
Radiology
Rheumatology
Ophthalmology
Surgery
Urology
Some hospitals will have outpatient departments and some will have chronic treatment units such as behavioral health services, dentistry, dermatology, ward, rehabilitation, and physical therapy.
Common support units include a dispensary or pharmacy, pathology, and radiology, and on the non-medical side, there often are medical records departments, release of information departments, Information Management (IM)(aka IT or IS), Clinical Engineering (aka Biomed), Facilities Management, Plant Ops (aka Maintenance), Dining Services, and Security departments
Housing is a basic human requirement of any civilised society. With the growth of urbanisation, cities have been expanding alarmingly in the last few decades, which has resulted in haphazard growth of urban areas as well as acute housing shortage.
Housing and Urban Planning Department was established to ensure planned development of urban areas and create an enabling environment to provide affordable housing.
UAPVP launched many schemes available for different segments of the society including EWS, LIG, MIG, BPL and HIG categories.
UPAVP the development agency of Uttar Pradesh know as Uttar Pradesh Awas Vikas Parishad is going to implement the government housing mission, Pradhan Mantri Awas Yojana.
About 20,000 houses will be constructed in the state.
On the construction of housing units, the UPAVP will spend about Rs. 3,000 Crore and the implementation work will be started once it get the approval from the government.
The comprehensive plan for Fiscal year 2017-18 has been prepared by the agency and the houses units in these projects will be constructed under UP government Vrindavan & Awadh Vihar Yojana.
Under PMAY UP, about 2,000 houses have been registered by the government and creating further plan for the scheme, the UPAVP is planning to open the registrations for additional 3,000 houses.
UAPVP launched many schemes available for different segments of the society including EWS, LIG, MIG, BPL and HIG categories.
UPAVP the development agency of Uttar Pradesh know as Uttar Pradesh Awas Vikas Parishad is going to implement the government housing mission, Pradhan Mantri Awas Yojana.
About 20,000 houses will be constructed in the state.
On the construction of housing units, the UPAVP will spend about Rs. 3,000 Crore and the implementation work will be started once it get the approval from the government.
The comprehensive plan for Fiscal year 2017-18 has been prepared by the agency and the houses units in these projects will be constructed under UP government Vrindavan & Awadh Vihar Yojana.
Under PMAY UP, about 2,000 houses have been registered by the government and creating further plan for the scheme, the UPAVP is planning to open the registrations for additional 3,000 houses.
UAPVP launched many schemes available for different segments of the society including EWS, LIG, MIG, BPL and HIG categories.
UPAVP the development agency of Uttar Pradesh know as Uttar Pradesh Awas Vikas Parishad is going to implement the government housing mission, Pradhan Mantri Awas Yojana.
About 20,000 houses will be constructed in the state.
On the construction of housing units, the UPAVP will spend about Rs. 3,000 Crore and the implementation work will be started once it get the approval from the government.
The comprehensive plan for Fiscal year 2017-18 has been prepared by the agency and the houses units in these projects will be constructed under UP government Vrindavan & Awadh Vihar Yojana.
Under PMAY UP, about 2,000 houses have been registered by the government and creating further plan for the scheme, the UPAVP is planning to open the registrations for additional 3,000 houses.
UAPVP launched many schemes available for different segments of the society including EWS, LIG, MIG, BPL and HIG categories.
UPAVP the development agency of Uttar Pradesh know as Uttar Pradesh Awas Vikas Parishad is going to implement the government housing mission, Pradhan Mantri Awas Yojana.
About 20,000 houses will be constructed in the state.
On the construction of housing units, the UPAVP will spend about Rs. 3,000 Crore and the implementation work will be started once it get the approval from the government.
The comprehensive plan for Fiscal year 2017-18 has been prepared by the agency and the houses units in these projects will be constructed under UP government Vrindavan & Awadh Vihar Yojana.
Under PMAY UP, about 2,000 houses have been registered by the government and creating further plan for the scheme, the UPAVP is planning to open the registrations for additional 3,000 houses.
Housing is one of the basic necessities of life and the right to housing and adequate shelter is guaranteed in the Directive Principles of State Policy enshrined in the Constitution of India.
The rapid pace of urbanisation in India has resulted in severe shortage of housing and basic services like potable water, well laid out drainage system, sewerage network, sanitation facilities, electricity, roads and appropriate disposal of solid waste.
AREA OF SCHEME MINIMUM 5 ACRE, MAXIMUM 100 ACRES.
MINIMUM 60% AREA SHALL BE USED FOR AFFORDABLE HOUSING & CARPET AREA OF DWELLING UNIT SHALL NOT EXCEED 75 SQM.
40% AREA MAY BE UTILIZED FOR HIG, COMMERCIAL, INSTITUTIONAL,
RECREATIONAL & COMMUNITY FACILITIES.
MINIMUM 20% HOUSES SHALL BE PROVIDED FOR EWS & UG AGAINST HIG UNITS BUT NOT COMPULSARY IN AN EXCLUSIVE AFFORDABLE HOUSING SCHEME.
CEILING COST OF AFFORDABLE HOUSE IN NCR-RS.3000 PER SQ. FT., METRO CITIES-RS.2800 PER SQ.FT. & TOWNS-RS.2500 PER SQ.FT. ON SUPER BUILD UP AREA (TO BE REVISED BASED ON COST INDEX)
Green architecture defines an understanding of environment-friendly architecture under all classifications, and contains some universal consent, It may have many of these characteristics:
x Ventilation systems designed for efficient heating and cooling
x Energy-efficient lighting and appliances
x Water-saving plumbing fixtures
x Landscapes planned to maximize passive solar energy
x Minimal harm to the natural habitat
x Alternate power sources such as solar power or wind power
x Non-synthetic, non-toxic materials
x Locally-obtained woods and stone
x Responsibly-harvested woods
x Adaptive reuse of older buildings
x Use of recycled architectural salvage
x Efficient use of space1.Interaction
The relationships between construction site and architecture, green space and architecture, and also with people and form are emphasized here.
2.Form
With the new design thinking and process, concern for sustainable needs and computer aided technology, the form of architecture, or the use of building envelops may be redefined in the digital-green environment.
3.Construction:
With the aid of computer technology and 3D modelling techniques
Housing is a basic human requirement of any civilised society. With the growth of urbanisation, cities have been expanding alarmingly in the last few decades, which has resulted in haphazard growth of urban areas as well as acute housing shortage.
Housing and Urban Planning Department was established to ensure planned development of urban areas and create an enabling environment to provide affordable housing.
India needs about 19 million low-cost homes - roughly defined as costing a million rupees ($16,700) and below - to shelter an urban population expected to nearly double to 600 million by 2030 from 2011.
Samajwadi Awas Yojana is one the most popular and affordable government scheme which is launched for urban areas for full filling the needs of Houses in very affordable price for different categories of Uttar pradesh.
Uttar pradesh government initiated this samajwadi avas yojana by the help of Public private partnership. Chief Minister of uttar pradesh has already given there approval regarding the Samajwadi Avas Vikas Yojana.
Environment has positive
effects on human behaviour.
The Environment we live in
provides us all the natural
resources necessary for human
survival for instance-food,
minerals, water, land ,air etc.
amount of energy used is equal to amount of renewable energy created on the site
reduce carbon emissions & reduce dependence on fossil fuels
Buildings that produce a surplus of energy over the year are called “Energy Surplus Buildings”
During the last 20 years more than 200 reputable projects claiming net zero energy balance have been realized all over the world.
NZEB buildings consequently contribute less overall greenhouse gas to the atmosphere than similar non-ZNE buildings. They do at times consume non-renewable energy and produce greenhouse gases, but at other times reduce energy consumption and greenhouse gas production elsewhere by the same amount. Traditional buildings consume 40% of the total fossil fuel energy in all over the world and are significant contributors of greenhouse gases.
More from Hamzah Meraj, Faculty of Architecture, Jamia Millia Islamia, New delhi (20)
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
3. •In metallurgy, a non-ferrous metal is any metal, including alloys, that does not
contain iron in appreciable amounts.
• Generally more expensive than ferrous metals, non-ferrous metals are used because of
desirable properties such as:
low weight (e.g., aluminium).
Higher conductivity (e.g., copper),
Non-magnetic property or resistance to corrosion (e.g., zinc).
•Some non-ferrous materials are also used in the iron and steel industries. For
example, bauxite is used as flux for blast furnaces, while others such
as wolframite, pyrolusite and chromite are used in making ferrous alloys
NON-FERROUS METALS
4. FERROUS METALS
•Ferrous is an adjective used to indicate the presence of iron.
•Ferrous metals include steel and pig iron (with a carbon content of a few
percent) and alloys of iron with other metals (such as stainless steel).
ALLOYS
BRONZE - COPPER+TIN
USE - Medals, statues, sculptures, etc.
BRASS - COPPER+ZINC
USES -UTENSILS
STAINLESS STEEL : High ductility and strength.Non-
magnetic. Excellent high and low temperature
properties.
USES: Utensils, corrosive piping, dairy
equipment, food processing equipment etc.
5. Wrought Iron Is An Iron Alloy With A Very Low Carbon Content In Contrast
To Steel, And Has Fibrous Inclusions, Known As Slag.
This Is What Gives It A "Grain" Resembling Wood, Which Is Visible When It Is
Etched Or Bent To The Point Of Failure.
Wrought Iron Is Tough, Malleable, Ductile And Easily Welded.
6. Due to its malleability and toughness, wrought iron has been coveted for thousands of
years..
To look at the history of wrought iron is to look at the history of man's innovations.
•Throughout time, wrought iron has been used to build ancient structures, warships and
railways.
Wrought iron has fought wars, built kingdoms, and provided the structures to everlasting
historical landmarks.
Today, the timeless look of wrought iron can be found anywhere in homes from light
fixtures, to wine racks, to candle holders.
HISTORY
7. Wrought iron has been used for many centuries, and is the "iron"
that is referred to throughout western history.
• Ironwork date back to ancient Egypt and Mesopotamia as far back
as around 3500 B.C.
• Around the 8th century B.C., early civilizations such as the Hittites
and the Mycenaean Greeks began equipping their armies with iron
swords.
Knowledge about the use of iron spread from the Middle East to
Greece and the Aegean region by 1000 B.C, and had reached
western and central Europe by 600 B.C.
By the 5th century B.C., iron swords had replaced bronze all over
Europe.
HISTORY (Ancient Period)
8. •16th century: Ironwork became sophisticated and high
decorative, throughout the elaborate cathedrals of Spain to
balconies, patios and gateways of France.
•18th century led to beautiful railings and gates throughout
London.
Demand for wrought iron reached its peak in the 1860s with the
adaptation of ironclad warships and railways,
- Balconies
- Porches and verandas
- Canopies
- Roof cresting
- Lamps
- Grilles
- Hardware
HISTORY (Medieval Period)
ST.PETERSBURG PALACE
Notre dame Roof crestinglamps
9. The raw material wrought iron gradually disappeared, until the
last ironworks ceased production in the 1970's.
Wrought iron is no longer produced on a commercial scale, but is
still made for replication, restoration and conservation of
historical ironwork.
• Nails
•Iron cramps (i.e. to secure masonry veneer building frames)
• Structural members in tension such as tie rods (or strap
work), bulb-tees and I-beams.
The standard sections of wrought iron included bar iron, angle
and T irons, channel iron (half iron), rolled girder iron (rolled joist
iron, beam iron, I or H iron), various special sections (sash
bar, beading iron, cross iron, quadrant iron), iron bars, rivet
iron, chain iron, horseshoe iron, nail iron, plate iron, coated iron
(tin or lead), and corrugated sheet iron (generally galvanized).
HISTORY (Early Period)
10. NOW (21TH CENTURY)
In fencing In main entrance gates
In railings As balusters
•The wrought is replaced to a very great
extent by mild steel.
•It is used where a tough material is
required.
Used for rivets, chains, ornamental iron
work, railway couplings, water and
steam pipes.
•It is manufactured for steel, bolts and
nuts, horse shoe bars, handrails, straps
for timer roof trusses, boiler
tubes, roofing
sheets, armatures, electromagnets etc.
11. Property Value
Ultimate tensile strength [psi (MPa)] 34,000–54,000 (234–372)
Ultimate compression strength [psi (MPa)] 34,000–54,000 (234–372)
Ultimate shear strength [psi (MPa)] 28,000–45,000 (193–310)
Yield point [psi (MPa)] 23,000–32,000 (159–221)
Modulus of elasticity (in tension) [psi (MPa)] 28,000,000 (193,100)
Melting point [°F (°C)] 2,800 (1,540)
Specific gravity
7.6–7.9
7.5–7.8
12. •It becomes soft at white heat and it can be easily forged and welded.
•It can be used to form temporary magnets but cannot be magnetised
permanently.
•It fuses with difficulty .
•It cannot be adopted for making castings.
• high elasticity and tensile strength
•It is moderately elastic ,ductile, malleable and tough.
•Unaffected by saline water.
• If pulled apart, the fracture shows a fibrous break.
•Suitable for members in tension OR compression; whereas, cast iron is
suitable for members in compression ONLY.
PROPERTIES
13. • Its ability to RESIST CORROSION and fatigue failure. The slag fibers in wrought iron
are present in such great numbers that they serve in one capacity as an effective
mechanical barrier against corrosion.
• DUCTILITY -its ability to be drawn out.
• MALLEABILITY -its ability to be hammered into shapes.
• DURABILITY and ELEGANCE,
• LOW MAINTAINANCE-Wrought iron is also easy to maintain and is low in
maintenance.
QUALITY
14. Material Iron Carbon Manganese Sulfur Phosphorus Silicon
Pig iron 91–94 3.5–4.5 0.5–2.5 0.018–0.1 0.03–0.1 0.25–3.5
Carbon steel 98.1–99.5 0.07–1.3 0.3–1.0 0.02–0.06 0.002–0.1 0.005–0.5
Wrought iron 99–99.8 0.05–0.25 0.01–0.1 0.02–0.1 0.05–0.2 0.02–0.2
All units are percent weight
FERROUS METALS
15. Wrought iron Cast Iron Steel
Rusting Rusts more than Cast
Iron
Does not rust
easily
Rusts easily
Malleability &
Ductility
Tough, malleable,
ductile & moderately
elastic
Brittle & cannot
be welded or
rolled into sheets
Tough, malleable &
Ductile
Reaction to sudden
shock
Cannot stand heavy
shocks
Does not absorb
shocks
Absorbs shocks
Welding Easily welded Brittle and cannot
be welded or
rolled into sheets
Rapidly welded
16.
17. Iron Ore
Blast Furnace
Pig Iron
Smelted, Hammered, Re-
heated, Rolled
Smelted,Alloyed, Rolled
Wrought Iron Cast Iron Mild Iron(Steel)
Re- melted,
Poured into sand
molds
18. IRON ORE
PIG IRON
CAST IRON
WROUGHT IRON
STEEL
IRON MANUFACTURING
Cast iron, wrought iron and steel are all essentially alloys of iron and carbon
Iron is extracted from naturally occurring ores and we can think of these ores as providing the
source material, iron oxide (FeO)
When iron oxide is heated at high temperatures it becomes transformed into iron.
Iron Oxide + Carbon heated along with a blast of air yields Iron + Carbon Monoxide.
This process does not yield pure iron, but an impure product called pig iron. This pig iron contains
impurities such as Iron Carbide (Fe3C) which make the material hard and brittle.
The remelting of pig iron, and scrap iron, whilst blowing air into the molten mass until the
Carbon content is between 2.4 and 4.0% produces Contemporary Cast Iron
The strength deficiencies of cast iron were eventually partly addressed by the development
of a process termed "puddling". This involved reheating cast iron and manually mixing air in
with the molten mass.
The invention of the Bessemer process allowed the oxidisation process after remelting to be
carefully controlled and the carbon content could therefore be held at a particular
level, providing good tensile strength and ductility.
20. charged with charcoal and iron ore and then lit.
Air was blown in through a tuyere to heat the bloomery to a temperature
somewhat below the melting point of iron.
slag would melt and run out, and carbon monoxide from the charcoal
would reduce the ore to iron
iron in the solid state
bloomery was allowed to become hot enough to melt the
iron, carbon would dissolve into it and form pig or cast iron
After smelting was complete, the bloom was removed, and the
process could then be started again
21. FINERY PROCESS
They re-melted the pig iron and burnt out the
carbon, producing a bloom, which was then forged into a
bar iron
After the bloomery process
In the 15th century, the blast furnace spread in Belgium and it
was improved further.
22. A number of processes for making wrought iron without charcoal were devised as
the Industrial Revolution began during the latter half of the 18th century. The most
successful of these was pudling, using a pudling furnace..
PUDLING PROCESS
This metal was placed into the hearth of the pudling
furnace where it was melted.
The hearth was lined with oxidizing agents such as haematite and
iron oxide. This mixture is subjected to a strong current of air and
stirred with long bars, called puddling bars
The air, stirring, and "boiling" action of the metal help the oxidizing
agents to oxidize the impurities and carbon out of the pig iron to their
maximum capability
23. In 1925, James Aston of the United States developed a process for manufacturing
wrought iron quickly and economically.
It involves taking molten steel from a Bessemer
converter and pouring it into cooler liquid slag.
The molten steel contains a large amount of dissolved gases. so when the
liquid steel hits the cooler surfaces of the liquid slag the gases are liberated.
The molten steel then freezes to yield a spongy mass having a
temperature of about 1370 °C.
This spongy mass must then be finished by being
shingled and rolled.
ASTON PROCESS
24. There is still some slag left in the puddle balls, so while they are still hot
they must be shingled to remove the remaining slag and cinder.It may be
achieved by forging the balls under a power hammer, or by squeezing the
bloom in a machine. The material obtained at the end of shingling is
known as bloom and it is still red-hot. The blooms are not useful in this
form, so they must be rolled into a final product.
Rolling
The bloom is passed through grooved rollers and flat bars were produced. These
bars of wrought iron were of poor quality, called muck bars or puddle bars. To
improve the quality of wrought iron, these bars were cut up, piled and tied together
by wires, a process known as faggoting or piling. They were then reheated and
rolled again in merchant rolls. This process may be repeated several times to get
wrought iron of desired quality. Wrought iron that has been rolled multiple times is
called merchant bar or merchant iron
25. ADVANTAGES :-
(1) It welds better than does steel,
(2) lasts longer when exposed to weather or to water,
(3) It is better to resist shock and vibration (fatigue), in use,
(4) Its fibrous structure arrests fracture, as its breaking is in the
nature of a gradual tearing, which often gives warning of a
dangerous stress, while steel breaks suddenly.
DISADVANTAGES
(1) Its elastic and tensile strength are lower than those of steel,
(2) Its production is more costly.
27. Chemical corrosion can attack decorative and structural wrought iron features
in several ways:
1. Uniform Attack: Corrosion attacks the metal surface evenly.
2. Pitting: Attacks the metal surface in selected areas.
3. Selective Attack: When a metal is not homogenous throughout, certain areas
may be attacked in preference to others.
4. Stress corrosion cracking: Attacks areas in a metal which were stressed
during metal working and were later exposed to a corrosive environment.
5. Rust: It occurs when unprotected metal is exposed to oxygen in the
atmosphere in the presence of moisture.
6. Galvanic (or Electro-Chemical) Corrosion: Galvanic corrosion occurs when
two dissimilar metals are in contact with one another and an electrolyte.
Pitting attack
Rust
Selective attack
Galvanic corrosion
Uniform attack
28. Mechanical or physical deterioration:
1. Fatigue: Failure of metal that has been repeatedly stressed beyond its elastic limit.
a. Wrought iron is generally fatigue resistant because it is so tough. It will deform considerably,
within its elastic limit, without failure.
b. Even if past overloading has caused deformation, wrought iron fixings will usually continue
to function.
c. Defects in the wrought iron itself, or stress points can cause a feature to fracture.
2. Heat: Usually in the form of fire, will cause wrought iron features to become plastic, distort, and fail.
3. Distortion: Permanent deformation or failure may occur when a metal is overloaded beyond its yield
point because of increased live or dead loads, thermal stresses, or structural modifications altering a stress
regime
29. REDSHORT – It contains sulfur in excess quantity.
It makes the iron brittle due to formation of iron sulphide.
It has sufficient tenacity when cold, but cracks when bent or finished at a red heat. It
is therefore useless for welding or forging.
COLDSHORT-It contains excessive phosphorus.
It is very brittle when it is cold. It cracks if bent.
It may, however, be worked at high temperature. Historically, coldshort iron was
considered good enough for nails.
PROBLEMS DUE TO ITS CONSTITUENTS
37. USES OF WROUGHT IRON IN A HOUSE:
WROUGHT IRON FLOOR VENT
FRONT PORCH WHITE WITH IRON RAILS
BALUSTERS
RAILINGS
INTERIOR FURNITURE
KITCHEN HANDLES AND
DOOR KNOBS
WINDOW GRILLS
38. CASE STUDY
IRON PILLAR
Iron pillar at Delhi, India, containing 98%
wrought iron.
Analysis of the Iron Pillar of Delhi gives
0.10% in the slags for .18% in the iron
itself, for a total P content of 0.28% in the
metal and accounts for much of its corrosion
resistance.
39. EIFFEL TOWER
CASE STUDY
The Eiffel tower is constructed from puddled
iron, a form of wrought iron.
Structure of the Eiffel Tower weighs
7,300 tonnes.
40. RATE ANALYSIS
SHOP RATES
1. BABA RAMDEV KI DUKAAN BHOGAL
for shopkeeper for customer
rate of wrought iron in kg 45-50 per kg 60-70 per kg
rate of wrought iron in sq. feet Rs.130 for simple design
Rs.300-350 for typical designs