SAE J403-2024 碳钢的化学成分

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SAE Executive Standards Committee Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is

entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.”

SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and

suggestions.

recording, or otherwise, without the prior written permission of SAE.

TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)

Tel: +1 724-776-4970 (outside USA)

Fax: 724-776-0790

Email: CustomerService@sae.org

SAE WEB ADDRESS: http://www.sae.org

For more information on this standard, visit

https://www.sae.org/standards/content/J403_202402/

SURFACE VEHICLE

STANDARD

J403™

FEB2024

Issued 1911-06

Revised 2014-06

Stabilized 2024-02

Superseding J403 JUN2014

Chemical Compositions of SAE Carbon Steels

RATIONALE

The technical report covers products and processes which are mature and not likely to change in the foreseeable future.

STABILIZED NOTICE

This document has been declared “STABILIZED” by SAE Metals Technical Committee and will no longer be subjected to

periodic reviews for currency. Users are responsible for verifying references and continued suitability of technical

requirements. Newer technology may exist.

SAE INTERNATIONAL J403™ FEB2024 Page 1 of 11

1. SCOPE

In 1941, the SAE Iron and Steel Division, in collaboration with the American Iron and Steel Institute (AISI), made a major

change in the method of expressing composition ranges for the SAE steels. The plan, as now applied, is based in general

on narrower cast or heat analysis ranges plus certain product analysis allowances on individual samples, in place of the

fixed ranges and limits without tolerances formerly provided for carbon and other elements in SAE steels.

For years the variety of chemical compositions of steel has been a matter of concern in the steel industry. It was

recognized that production of fewer grades of steel could result in improved deliveries and provide a better opportunity to

achieve advances in technology, manufacturing practices, and quality, and thus develop more fully the possibilities of

application inherent in those grades.

Comprehensive and impartial studies were directed toward determining which of the many grades being specified were

the ones in most common demand, and the feasibility of combining compositions having like requirements. From these

studies, the most common grades of steel have been selected and kept in the current revision. The cast or heat chemical

composition limits or ranges of these grades are given in Tables 1, 2, 3A, and 3B. These cast or heat limits or ranges are

subject to standard variations for product analysis as given in SAE J409. Since AISI is no longer issuing steel grade

designations, grades listed in this document are SAE grades.

It is recognized that chemical compositions other than those listed in the previously mentioned tables will at times be

needed for specialized applications or processing. When such a steel is required, the elements comprising the desired

chemical composition are specified in one of three ways: (a) by a minimum limit, (b) by a maximum limit, or (c) by

minimum and maximum limits, termed a range.

SAE INTERNATIONAL J403™ FEB2024 Page 2 of 11

Standard cast or heat analysis limits and ranges for the various elements of carbon steels are given in Table 4. In this

table, range is the arithmetical difference between the minimum and maximum limits (that is, 0.19 to 0.25 is a 0.06 range).

These cast or heat limits and ranges are also subject to standard variations for product analysis as given in SAE J409.

ISTC Division 1 has developed a procedure which allows for the maintenance of the grade lists in this document. This will

involve conducting an industry-wide survey to solicit input. This survey will be conducted at a frequency deemed

necessary by the technical committee.

Criteria have been established for the addition to or the deletion of grades from the grade lists. New grades will be

considered based on the grade meeting a SAE grade designation and chemistry, having a minimum production or

consumption of 225 tonnes/year (250 tons/year) and has the sponsorship of at least two individual users or producers.

New steel compositions will be considered as Potential Standard (PS) steels, based on the guidelines in SAE J1081, until

such time as production of the new steel achieves a level of production or usage qualifying it for consideration as a

standard steel.

Deletion of grades will be by consensus based on the grade survey. Deleted grades will be archived in SAE J1249.

When the cast or heat analysis is requested to be reported to demonstrate conformance to the chemical limits shown in

Tables 1, 2, 3A, or 3B, in addition to the quantities of carbon, manganese, phosphorus, and sulfur, the following elements

and their quantities shall also be reported: copper, chromium, nickel, molybdenum, and silicon. When the amount of any

one of these last five elements is less than 0.02% that analysis may be reported as “<0.02%.”

Based on a survey question in the 2006 Grade Survey, the grade lists have been revised such that chemistries of all

product forms are now consolidated into single tables. The chemistry ranges listed will be the narrowest range for the

various product forms with the exception of S content. It is acknowledged however that due to differences in the section

size of the various product forms, chemical composition demands for the product forms should be different to allow for

adequate flexibility of steel application. These differences are reflected in Tables 4 and 5.

2. REFERENCES

2.1 Applicable Documents

The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the

latest issue of SAE publications shall apply.

2.1.1 SAE Publications

Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA

and Canada) or 724-776-4970 (outside USA), www.sae.org.

SAE J409 Product Analysis - Permissible Variations from Specified Chemical Analysis of a Heat or Cast of Steel

SAE J411 Carbon and Alloy Steels

SAE J1081 Potential Standard Steels

SAE J1249 Former SAE Standard and Former SAE Ex-Steels

SAE J1268 Hardenability Bands for Carbon and Alloy H Steels

SAE J1868 Restricted Hardenability Bands for Selected Alloy Steels

2.1.2 ISS Publication

Available from ISS, 186 Thorn Hill Rd., Warrendale, PA 15086-7528, Tel: 724-776-6040, www.iss.org.

ISS Carbon and Alloy Steel Bar and Semi-Finished Products Manual

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标签： #碳钢 #钢 #化学成分

摘要：

SAE J403-2024标准是国际汽车工程师学会发布的最新版碳钢化学成分规范，详细规定了各类碳钢在汽车制造及相关工业应用中的化学成分范围、允许偏差及检测要求。该标准取代了旧版本，更新了硫、磷、锰等关键元素的含量限制，并增加了对现代冶炼工艺的适应性说明。本文档为材料工程师、质量检测人员及采购部门提供了准确的碳钢牌号分类与成分参考，确保零部件在强度、可焊性和加工性能上符合行业最新要求。理解并遵循SAE J403-2024有助于提升产品一致性，降低因成分波动导致的质量风险，是汽车钢材选型与验收的重要

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