Designation

This standard is issued under the fixed designation A751; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (ε) indicates an editorial change since the last revision or reapproval.

This standard has been approved for use by agencies of the U.S. Department of Defense.

INTRODUCTION

These test methods and practices were prepared to answer the need for a single document that would include all aspects of obtaining and reporting the chemical analysis of steel, stainless steel, and related alloys. Such subjects as definitions of terms and product (check) analysis variations (tolerances) required clarification. Requirements for sampling, meeting specified limits, and treatment of data usually were not clearly established in product specifications.

It is intended that these test methods and practices will contain all requirements for the determination of chemical composition of steel, stainless steel, or related alloys so that product specifications will need contain only special modifications and exceptions.

1. Scope*

1.1

These test methods and practices cover definitions, reference methods, practices, and guides relating to the chemical analysis of steel, stainless steel, and related alloys. They include both wet chemical and instrumental techniques.

1.2

Directions are provided for handling chemical requirements, product analyses, residual elements, and reference standards, and for the treatment and reporting of chemical analysis data.

1.3

These test methods and practices apply only to those product standards which include these test methods and practices, or parts thereof, as a requirement.

1.4

In cases of conflict, the product specification requirements shall take precedence over the requirements of these test methods and practices.

1.5

Attention is directed to ISO/IEC 17025 when there may be a need for information on criteria for evaluation of testing laboratories.

1.6

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

2. Referenced Documents

2.1

2.2

3. Terminology

3.1

3.2

4. Concerning Specification of Chemical Composition Requirements

4.1

4.2

4.3

4.4

5. Cast or Heat Analysis

5.1

5.2

5.3

6. Product Analysis Requirements

6.1

6.2

6.3

7. Unspecified Elements (Note 4)

7.1

7.2

8. Sampling

8.1

8.2

9. Test Methods

9.1

9.2

9.3

10. Reference Materials

10.1

10.2

11. Significant Numbers

11.1

11.2

12. Rounding Procedure

12.1

12.2

13. Records

13.1

14. Keywords

14.1

ASTM A751 - 21

Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

Published:

18 Nov 2021

Withdrawn:

13 Nov 2025