Structural Steels

1. Structural Steels and It’s Applications

2. 1
Introduction to Structural Steels
Structural steels are widely used in
industrial applications for their strength and
durability.
These steels are specifically designed to
provide support and stability to various
Structures.
They are commonly used in Buildings,
Bridges, Offshore platforms, and other
Heavy-duty structures.

3. 2
Some Commonly Type of Steels
Structural steels are often categorized
based on their chemical composition and
mechanical properties.
There some commonly use in Industrial
brand is
• Carbon Steel (Low, Medium & High)
• Low Alloy Steel
• Stainless Steel
• Tool Steel

4. 3
Low Carbon (Mild) Steels
Low carbon steels have a carbon content
of less than 0.3%.
They are easy to form and weld, making
them suitable for various applications.
Low carbon steels are commonly used for
construction of buildings, bridges, and
machinery.
Grades of widely use is:
(ASTM A36, S235, S275, SS400, Q235).

5. 4
Medium Carbon Steels
Medium Carbon steels have a carbon
content ranging from 0.3% to 0.60%.
They offer higher strength and hardness
compared to low carbon steels.
Medium carbon steels are often used in
automotive parts, gears, and shafts.
Grades of widely use is:
(ASTM A29 Grade 1045, ASTM A516
Grade 70).

6. 5
High Carbon Steels
High carbon steels have a carbon content
of more than 0.60%.
They exhibit excellent strength and
hardness but are less ductile.
High carbon steels are used in applications
that require high wear resistance, such as
cutting tools and springs.
Grades of widely use is:
(ASTM A600, SAE 1080).

7. 6
Alloy Steels
Alloy steels are made by adding alloying
elements to carbon steels (Manganese,
Nickel, Chromium, Vanadium, Silicon, and
Boron)
These alloying elements enhance specific
properties such as strength, toughness,
and corrosion resistance.
Alloy steels are commonly used in the
construction of bridges, pipelines, and
pressure vessels.

8. 7
High-Strength Low-Alloy (HSLA) Steels
HSLA steels are characterized by their high
strength and improved formability
compared to carbon steels.
HSLA steels are used in structural
applications that require high strength-to-
weight ratios, such as bridges and offshore
platforms.
Grades of widely use is:
(ASTM A572 Grade 50 & Grade 55,
Q345B, S355)

9. 8
Summary
Low Carbon & Low Alloy Steel were widely
use in Structures especially in Industrial
because of their strength and durability &
highly versatile and can be easily fabricated
into various shapes and sizes.
Engineer have to clearly know about their
properties to provide support and stability
to various structures.
Mechanical tests, including tensile and
impact tests, are conducted to assess the
properties of structural steels.

10. 9
References
American Society for Testing and Materials.
(2018). Standard Specification for High-
Strength Low-Alloy Columbium-Vanadium
Structural Steel. ASTM A572/A572M-18.
ASTM International.