This document provides an overview and summary of the ASTM E 527-83 standard for numbering metals and alloys using the Unified Numbering System (UNS). It describes the purpose of the UNS in providing a single, unified system to identify metals and avoid confusion from multiple identification systems. It also outlines the organization that administers the UNS, including an advisory board, number assigning offices, and consultants who evaluate requests for assigning new UNS numbers. Procedures are defined for requesting a UNS number for a material not already covered.
1. OBJECT
The hardness test is a mechanical test for material properties which are used in engineering
design, analysis of structures, and materials development. The principal purpose of the
hardness test is to determine the suitability of a material for a given application, or the
particular treatment to which the material has been subjected. The ease with which the
hardness test can be made has made it the most common method of inspection for metals and
alloys.
Design by Analysis - A general guideline for pressure vesselAnalyzeForSafety
This presentation file is provided by Mr. Ghanbari and published under permission.
The presentation gives an introduction and general guideline for pressure vessel design by analysis.
The “design by analysis” procedures are intended to guard against eight possible pressure vessel failure modes by performing a detailed stress analysis of the vessel with the sufficient design factors. The failure modes are:
1.excessive elastic deformation, including elastic instability,
2.excessive plastic deformation,
3.brittle fracture,
4.stress rupture/creep deformation (inelastic),
5.plastic instability - incremental collapse,
6.high strain - low cycle fatigue,
7.stress corrosion, and
8.corrosion fatigue
Most of the “design by analysis” procedures that are given in ASME BPVC relate to designs based on “elastic analysis.”
The design-by-analysis requirements are organized based on protection against the failure modes listed below. The component shall be evaluated for each applicable failure mode. If multiple assessment procedures are provided for a failure mode, only one of these procedures must be satisfied to qualify the design of a component.
a)All pressure vessels within the scope of this Division, irrespective of size or pressure, shall be provided with protection against overpressure in accordance with the requirements of this Part.
b)Protection Against Plastic Collapse – these requirements apply to all components where the thickness and configuration of the component is established using design-by-analysis rules.
c)Protection Against Local Failure – these requirements apply to all components where the thickness and configuration of the component is established using design-by-analysis rules. It is not necessary to evaluate the local strain limit criterion if the component design is in accordance with Part 4 (i.e. component wall thickness and weld detail per paragraph 4.2).
d)Protection Against Collapse From Buckling – these requirements apply to all components where the thickness and configuration of the component is established using design-by-analysis rules and the applied loads result in a compressive stress field.
e)Protection Against Failure From Cyclic Loading – these requirements apply to all components where the thickness and configuration of the component is established using design-by-analysis rules and the applied loads are cyclic. In addition, these requirements can also be used to qualify a component for cyclic loading where the thickness and size of the component are established using the design-by-rule requirements of Part 4.
Stress Ratio Effects in Fatigue of Lost Foam Aluminum Alloy 356 Dave Palmer, P.E.
Lost foam casting is a highly versatile metalcasting process that offers significant benefits in terms of design flexibility, energy consumption, and environmental impact. In the present work, the fatigue behavior of lost foam cast aluminum alloy 356, in conditions T6 and T7, was investigated, under both zero and non-zero mean stress conditions, with either as-cast or machined surface finish. Scanning electron microscopy was used to identify and measure the defect from which fatigue fracture initiated. Based on the results, the applicability of nine different fatigue mean stress equations was compared. The widely-used Goodman equation was found to be highly non-conservative, while the Stulen, Topper-Sandor, and Walker equations performed reasonably well. Each of these three equations includes a material-dependent term for stress ratio sensitivity. The stress ratio sensitivity was found to be affected by heat treatment, with the T6 condition having greater sensitivity than the T7 condition. The surface condition (as-cast vs. machined) did not significantly affect the stress ratio sensitivity. The fatigue life of as-cast specimens was found to be approximately 60 – 70% lower than that of machined specimens at the same equivalent stress. This reduction could not be attributed to defect size alone, and may be due to the greater frequency of oxide films near the as-cast surface. Directions for future work, including improved testing methods and some possible methods of improving the properties of lost foam castings, are discussed.
1. OBJECT
The hardness test is a mechanical test for material properties which are used in engineering
design, analysis of structures, and materials development. The principal purpose of the
hardness test is to determine the suitability of a material for a given application, or the
particular treatment to which the material has been subjected. The ease with which the
hardness test can be made has made it the most common method of inspection for metals and
alloys.
Design by Analysis - A general guideline for pressure vesselAnalyzeForSafety
This presentation file is provided by Mr. Ghanbari and published under permission.
The presentation gives an introduction and general guideline for pressure vessel design by analysis.
The “design by analysis” procedures are intended to guard against eight possible pressure vessel failure modes by performing a detailed stress analysis of the vessel with the sufficient design factors. The failure modes are:
1.excessive elastic deformation, including elastic instability,
2.excessive plastic deformation,
3.brittle fracture,
4.stress rupture/creep deformation (inelastic),
5.plastic instability - incremental collapse,
6.high strain - low cycle fatigue,
7.stress corrosion, and
8.corrosion fatigue
Most of the “design by analysis” procedures that are given in ASME BPVC relate to designs based on “elastic analysis.”
The design-by-analysis requirements are organized based on protection against the failure modes listed below. The component shall be evaluated for each applicable failure mode. If multiple assessment procedures are provided for a failure mode, only one of these procedures must be satisfied to qualify the design of a component.
a)All pressure vessels within the scope of this Division, irrespective of size or pressure, shall be provided with protection against overpressure in accordance with the requirements of this Part.
b)Protection Against Plastic Collapse – these requirements apply to all components where the thickness and configuration of the component is established using design-by-analysis rules.
c)Protection Against Local Failure – these requirements apply to all components where the thickness and configuration of the component is established using design-by-analysis rules. It is not necessary to evaluate the local strain limit criterion if the component design is in accordance with Part 4 (i.e. component wall thickness and weld detail per paragraph 4.2).
d)Protection Against Collapse From Buckling – these requirements apply to all components where the thickness and configuration of the component is established using design-by-analysis rules and the applied loads result in a compressive stress field.
e)Protection Against Failure From Cyclic Loading – these requirements apply to all components where the thickness and configuration of the component is established using design-by-analysis rules and the applied loads are cyclic. In addition, these requirements can also be used to qualify a component for cyclic loading where the thickness and size of the component are established using the design-by-rule requirements of Part 4.
Stress Ratio Effects in Fatigue of Lost Foam Aluminum Alloy 356 Dave Palmer, P.E.
Lost foam casting is a highly versatile metalcasting process that offers significant benefits in terms of design flexibility, energy consumption, and environmental impact. In the present work, the fatigue behavior of lost foam cast aluminum alloy 356, in conditions T6 and T7, was investigated, under both zero and non-zero mean stress conditions, with either as-cast or machined surface finish. Scanning electron microscopy was used to identify and measure the defect from which fatigue fracture initiated. Based on the results, the applicability of nine different fatigue mean stress equations was compared. The widely-used Goodman equation was found to be highly non-conservative, while the Stulen, Topper-Sandor, and Walker equations performed reasonably well. Each of these three equations includes a material-dependent term for stress ratio sensitivity. The stress ratio sensitivity was found to be affected by heat treatment, with the T6 condition having greater sensitivity than the T7 condition. The surface condition (as-cast vs. machined) did not significantly affect the stress ratio sensitivity. The fatigue life of as-cast specimens was found to be approximately 60 – 70% lower than that of machined specimens at the same equivalent stress. This reduction could not be attributed to defect size alone, and may be due to the greater frequency of oxide films near the as-cast surface. Directions for future work, including improved testing methods and some possible methods of improving the properties of lost foam castings, are discussed.
The Standard Test Method, that defines the way a test is performed and the precision of the result.
The result of the test may be used to assess compliance with a Standard Specification. The Standard
Practice that defines a sequence of operations that, unlike a Standard Test Method, does not produce a
result. The Standard Guide that provides an organized collection of information or series of options that
does not recommend a specific course of action. The Standard Classification, that provides an
arrangement or division of materials, products, systems, or services into groups based on similar
characteristics such as origin, composition, properties, or use. The Terminology Standard that provides
agreed definitions of terms used in the other standards. The quality of the standards is such that they are
Frequently used worldwide
NACE is the corrosion engineer institute. As now, material corrosion exist in our daily life, no matter in the industry application or usual commercial product. They all suffer corrosion impact. As one of member valve industry, I would like to introduce NACE and its related code in upstream and downstream area for stimulating more idea and opponent for make our working environment safe and green.
The Standard Test Method, that defines the way a test is performed and the precision of the result.
The result of the test may be used to assess compliance with a Standard Specification. The Standard
Practice that defines a sequence of operations that, unlike a Standard Test Method, does not produce a
result. The Standard Guide that provides an organized collection of information or series of options that
does not recommend a specific course of action. The Standard Classification, that provides an
arrangement or division of materials, products, systems, or services into groups based on similar
characteristics such as origin, composition, properties, or use. The Terminology Standard that provides
agreed definitions of terms used in the other standards. The quality of the standards is such that they are
Frequently used worldwide
NACE is the corrosion engineer institute. As now, material corrosion exist in our daily life, no matter in the industry application or usual commercial product. They all suffer corrosion impact. As one of member valve industry, I would like to introduce NACE and its related code in upstream and downstream area for stimulating more idea and opponent for make our working environment safe and green.
Analytical Investigation and Comparison on Performance of Ss316, Ss440c and T...IJERA Editor
Theoretical analysis for performance studies of SS316, SS44OC and Titanium Alloy used as a cutting tool is presented in this paper. Tool temperature, tools wear and life of the tool is investigated analytically. These theoretical values are compared with the experimental studies conducted by the author. The values obtained from experimental studies are comparable with analytical values and variation is the correlation between theoretical and experimental values is of the order of 15%.
Zhejiang Dewei Stainless Steel Pipe Industry CO., Ltd is one of the largest manufacturer of welded pipe and tube (stainless steel, Duplex, Super Duplex, Nickel Alloys, Copper-NIckel Alloys) in east China. www.deweigroup.cn Contact: Simon Zhang Mobile/Whatsapp:+86 13586303108 Tel/Fax:+86 (0)573 89979557 / +86 (0)573 82219767 Email:youngadm@126.com
Inventory System Defined
Purpose and types of inventory
Independent vs. Dependent Demand
Single-Period Inventory Model
Multi-Period Inventory Models: Basic Fixed-Order Quantity Models
Multi-Period Inventory Models: Basic Fixed-Time Period Model
Miscellaneous Systems and Issues
A-B-C Approach
Inventory costs
Discuss the behavioral aspects of projects in terms of project personnel and the project manager.
Give a general description of PERT/CPM techniques.
Analyze networks with deterministic times.
Analyze networks with probabilistic times.
linear transformation and rank nullity theorem Manthan Chavda
In these notes, I will present everything we know so far about linear transformations.
This material comes from sections in the book, and supplemental that
I talk about in class.
The term regression was 1st used by the british biomethician sir
Francis Galton. While studying the relation between average
height of their children ,Galton found that the off springs of
abnormally tall or short parents tend to regress or step back to the
average population height . in the course of time the meaning of
the word “ Regreassion “ become wider and now it stands to
measure the average relationship between different variables. If
there are only 2 variable under study then one is taken as
independent and another is taken as dependent variable and
regression analysis explain how on the average the values of the
dependent variable change with a change in the values of the
independent variable.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Cosmetic shop management system project report.pdf
Numbering Metals and Alloy (UNS)ASTM – E 527 - 83
1. Standard Practice for
Numbering Metals and Alloys
(UNS)
ASTM – E 527 - 83
Presented by-
Shubham Singh (12BIE046)
Saurabh Srivastava (12BIE047)
Keyur Mevada (12BIE048)
Nimesh Thakkar (12BIE049)
Abhishek Trivedi (12BIE050)
2. ASTM E 527 - 83
This standard is issued under the fixed
designation E 527.
The number immediately following the
designation indicates the year of
original adoption or, in the case of
revision, the year of last revision
ASTM E 527 – 83
3. UNS – Unified Numbering
System
• This ASTM standard covers a unified
numbering system (UNS) for metals and alloys
that have a “commercial standing”, and covers
the procedure by which such numbers are
assigned.
• By “commercial standing” it is meant to portray
a material in active industrial use, although the
actual amount of such use will depend, among
other things, upon the type of materials.
• For example - Obviously gold will not be used
in the same “tonnages’’ as hot-rolled steel.
4. Why UNS?
The UNS provides a means of
correlating many nationally used
numbering systems currently
administered by societies, trade
associations, and individual users and
producers of metals and alloys.
Thereby avoiding confusion caused by
use of more than one identification
number for the same material.
And by the opposite situation of having
the same number assigned to two or
more entirely different materials.
5. A UNS number is not in itself a
specification, since it establishes NO
requirements for form, condition,
quality, etc.
It is a unified identification of metals
and alloys for which controlling limits
have been established in
specifications published elsewhere.
6. Description of Numbers Established for
Metals and Alloys
The unified numbering system (UNS)
establishes 18 series of numbers for metals
and alloys, as shown in Table 1.
Each UNS number consists of a single letter-
prefix followed by five digits.
In most cases the letter is suggestive of the
family of metals identified. for example, A for
aluminum, P for precious metals, and S for
stainless steels.
Each series is independent of the others in
such significance; this practice permits
greater flexibility and avoids complicated and
lengthy UNS numbers.
7.
8.
9.
10. Wherever feasible, identification “numbers’’ from
existing systems are incorporated into the UNS
numbers. The first 3 digits often match older 3-
digit numbering systems, while the last 2 digits
indicate more modern variations.
Copper Alloy No. 377 (forging brass) in the
original 3-digit system became C37700 in the
UNS System.
Carbon steel, presently identified by AISI 1020
(American Iron and Steel Institute), is covered
by “UNS G 10200 ’’; and
free cutting brass, presently identified by CDA
(Copper Development Association C 36000), is
covered by “UNS C 36000.’’
11. Welding filler metals fall into two general
categories:
Whose compositions are determined by the
filler metal analysis (e.g. solid bare wire or
rods and cast rods) .The solid bare wire and
rods continue to be assigned in the
established number series according to their
composition.
Whose composition is determined by the
weld deposit analysis (e.g. covered
electrodes, flux-cored and other composite
wire electrodes). These are assigned to a
new primary series with the letter W as
shown in Table.
12. ASTM and SAE periodically publish
up-to-date listings of all UNS numbers
assigned to specific metals and alloys,
with appropriate reference information
on each.
Many trade associations also publish
similar listings related to materials of
primary interest to their organizations.
14. Advisory Board
Advisory Board has approximately 20 volunteer members
who are affiliated with major producing and using
industries, trade associations, government agencies, and
standards societies, and who have extensive experience
with identification, classification, and specification of
materials.
The Board is the administrative arm of SAE and ASTM on
all matters pertaining to the UNS.
It coordinates thinking on the format of each series of
numbers and the administration of each by selected
experts. It sets up ground rules for determining eligibility
of any material for a UNS number, for requesting such
numbers, and for appealing unfavourable rulings.
It is the final referee on matters of disagreement
between requesters and assigners.
15. Several Number-Assigning
Offıces
UNS number assigners for certain materials are set up at
trade associations which have successfully administered
their own numbering systems; for other materials,
assigners are located at offices of SAE and ASTM.
Each of these assigners has the responsibility for
administering a specific series of numbers, as shown in
Table 3.
Each considers requests for assignment of new UNS
numbers, and informs applicants of the action taken.
Trade association UNS number assigners report
immediately to both SAE and ASTM details of each
number assignment.
ASTM and SAE assigners collaborate with designated
consultants when considering requests for assignment of
new numbers
16. Corps of Volunteer
Consultants
Consultants are selected by the Advisory Board to
provide expert knowledge of a specific field of materials.
Since they are utilized primarily by the Board and the
SAE and ASTM number assigners, they are not listed in
this recommended practice.
At the request of the ASTM (or SAE) number assigner,
a consultant considers a request for a new number in
the light of the ground rules established for the material
involved, decides whether a new number is justified,
and informs the ASTM or the SAE number assigner
accordingly.
This utilization of experts (consultants and number
assigners) is intended to ensure prompt and fair
consideration of all requests.
It permits each decision to be based on current
knowledge of the needs of a specific industry of
producers and users.
17. Staffs at ASTM and SAE
Staff members at SAE and ASTM
maintain duplicate master listings of
all UNS numbers assigned.
In addition, established SAE and
ASTM committees which normally
deal with standards and specifications
for the materials covered by the UNS,
and other knowledgeable persons,
are called upon by the Advisory Board
for advice.
19. •UNS numbers are assigned only to metals and alloys
that have a commercial standing
•The need for a new number should always be verified by
determining from the latest complete listing of already as
signed UNS numbers that a usable number is or is not
available.
20. For a new UNS number to be assigned, the
composition (or other properties, as applicable)
must be significantly different from that of any
metal or alloy which has already been assigned a
UNS number.
In the case of metals or alloys that are normally
identified or specified by chemical composition, the
chemical composition limits must be reported.
In the case of metals or alloys that are normally
identified or specified by mechanical (or other)
properties, such properties and limits thereof must
be reported. Only those chemical elements and
limits, if any, which are significant in defining such
materials need be reported.
21. Requests for new numbers shall be submitted on
“Application for UNS Number Assignment’’ forms
(see Fig. 1 and Fig. 2). Copies of these are
available from any UNS number assigning office
(see Table 3) or facsimiles may be made of the one
herein.
All instructions on the printed application form
should be read carefully and all information
provided as indicated.
22. To further assist in assigning UNS numbers, the
requester is encouraged to suggest a possible
UNS number in each request, giving appropriate
consideration to any existing number presently
used by a trade association, standards society,
producer, or user.
Each completed application form shall be sent to
the UNS number-assigning office having
responsibility for the series of numbers that
appears to most closely relate to the material
described on the form