ASTM A370-24a PDF

Full title and description

ASTM A370-24a — Standard Test Methods and Definitions for Mechanical Testing of Steel Products. This standard specifies standardized procedures and definitions for mechanical testing (tension, bend, hardness, impact, and related tests) of steel, stainless steel, and related alloy products used to evaluate conformance to material specifications and for general laboratory testing and acceptance purposes.

Abstract

ASTM A370-24a provides uniform test methods, specimen definitions, and reporting conventions for mechanical testing of ferrous products. It covers specimen preparation, test procedures, and acceptance conventions for tension, bend, hardness (Brinell, Rockwell, portable), and impact testing, plus annexes that give product-specific test details (bar, tubular, fasteners, wire, reinforcing bars, etc.). The standard establishes inch–pound units as the primary system with SI conversions where applicable and references laboratory competence guidelines.

General information

• Status: Active
• Publication date: October 15, 2024 (A370-24a; amendments/changes recorded through October 29, 2024)
• Publisher: ASTM International
• ICS / categories: 77.040.10 (Mechanical testing of metals); 77.140.01 (Iron and steel products in general)
• Edition / version: A370-24a (Designation A0370-24A, 2024A edition)
• Number of pages: 51

Scope

This standard covers procedures and definitions used in the mechanical testing of steels, stainless steels, and related alloys. It describes tension testing (yield, tensile, elongation, reduction of area), bend testing, hardness testing (Brinell, Rockwell, portable), impact testing (notched-bar/Charpy-type), and the reporting of results. Annexes provide additional procedures and details that apply to specific product forms (bar products, tubular products, fasteners, round wire, multi-wire strand, reinforcing bars) and special-purpose guidance such as heat-cycle simulation and rounding of test data. Inch–pound units are primary; SI conversions are provided for information.

Key topics and requirements

• Specimen types, dimensions, orientation, and sampling locations for reliable and reproducible mechanical tests.
• Tension testing procedures and definitions (yield strength, tensile strength, elongation, reduction of area) including gauge-length conventions.
• Bend testing methods and acceptance criteria for product forms where bend testing is specified.
• Hardness testing: Brinell, Rockwell, and portable hardness methods and reporting conventions.
• Impact testing (notched-bar/Charpy) procedures, temperature control, and interpretation (including transition behavior).
• Annexed, product-specific methods (A1–A10) for bars, tubing, fasteners, wire, reinforcing bars, test-data rounding, and heat-cycle simulation.
• Units and conversions: inch–pound units are the standard; SI conversions are informational; guidance for reporting converted values.
• Reference to laboratory competence and quality (ISO/IEC 17025) and user responsibility for safety and regulatory applicability.

Typical use and users

Used by materials and metallurgical laboratories, manufacturers of steel and stainless products, quality/inspection engineers, purchasers specifying mechanical requirements in contracts, research organizations, and standards committees. Common applications include incoming material acceptance testing, specification conformance verification, failure analysis, and post-service evaluation of components.

Related standards

Commonly referenced standards related to mechanical testing include ASTM E8 (tension testing of metallic materials), ASTM E23 (notched-bar impact testing of metallic materials), ASTM E10 (Brinell hardness test), ASTM E18 (Rockwell hardness test), and other ASTM product specifications that call for test methods defined in A370. Users should consult the cited test-method standards and relevant product specifications for complete requirements.

Keywords

tension test; tensile strength; yield strength; elongation; reduction of area; bend test; Charpy; impact test; Brinell; Rockwell; portable hardness; specimen; sampling; steel testing; stainless steel; mechanical properties; FATT; heat-cycle simulation; A370-24a.

FAQ

Q: What is this standard?

A: ASTM A370-24a is the ASTM International standard that defines test methods and terminology for mechanical testing of steel, stainless steel, and related alloy products, covering tension, bend, hardness, and impact tests plus product-specific annexes.

Q: What does it cover?

A: It specifies specimen preparation, test procedures, measurement and reporting conventions, units and conversions, and annexed methods for particular product forms; intended for conformance testing and general mechanical evaluation of ferrous products.

Q: Who typically uses it?

A: Materials testing laboratories, steel manufacturers, inspection and quality engineers, purchasers, and standards developers use A370 to ensure consistent mechanical testing and reporting.

Q: Is it current or superseded?

A: As published in October 2024 (A370-24a) the standard is listed as active; amendments/changes were recorded through October 29, 2024. Users should confirm the current status with ASTM if an exact currency check is required for procurement or compliance purposes.

Q: Is it part of a series?

A: A370 is a standalone collection of test methods referenced by many ASTM product specifications (various Book of Standards volumes for steel products). It is developed by ASTM Committee A01 (subcommittee A01.13) and is commonly used alongside ASTM test-method standards such as E8, E10, E18, and E23.

Q: What are the key keywords?

A: Key keywords include tension test, tensile strength, yield strength, elongation, bend test, Brinell hardness, Rockwell hardness, Charpy impact test, specimen dimensions, mechanical testing, steel products, and A370-24a.