ASTM A693-24 PDF

Full title and description

ASTM A693-24 — Standard Specification for Precipitation‑Hardening Stainless and Heat‑Resisting Steel Plate, Sheet, and Strip. Specifies chemical composition, mechanical property requirements, heat‑treatment conditions (solution‑annealed, cold‑worked, and precipitation‑hardened), and required tests for precipitation‑hardening stainless and heat‑resisting steels supplied as plate, sheet, or strip.

Abstract

ASTM A693-24 covers precipitation‑hardening stainless and heat‑resisting steel in plate, sheet, and strip forms. The standard defines permitted alloy types/UNS designations, composition limits, mechanical property limits (tensile strength, yield strength, elongation, hardness), heat‑treatment/processing conditions and basic test methods (bend, tension, hardness, and chemical analysis). It is intended for materials that require a combination of corrosion resistance and high strength developed by low‑temperature precipitation hardening, for use at room temperature and up to approximately 600 °F (315 °C).

General information

• Status: Active
• Publication date: May 9, 2024 (edition A693-24)
• Publisher: ASTM International
• ICS / categories: 77.140.20 (stainless steels); 77.140.50 (flat steel products and semi‑products)
• Edition / version: A693-24
• Number of pages: 8

Scope

The specification applies to precipitation‑hardening stainless and heat‑resisting steels furnished as plate, sheet, and strip. It covers materials intended to develop mechanical strength by precipitation hardening (low‑temperature heat treatments) and prescribes chemical composition ranges, mechanical property requirements in the delivered and/or hardened conditions, heat‑treatment conditions (solution‑annealed, cold‑worked, precipitation‑hardened), and acceptance tests. Typical service temperatures covered extend up to about 600 °F (315 °C). The standard addresses forming, machining, and bend testing requirements for samples cut from supplied material.

Key topics and requirements

• Definitions of material types and corresponding UNS designations (common PH stainless grades such as Type 630/UNS S17400 and related types).
• Chemical composition limits for C, Mn, P, S, Si, Cr, Ni, Al, Ti, Mo, Cu and other specified elements depending on type.
• Heat‑treatment conditions: solution‑annealed condition for most types; specified cold‑worked condition for some types (e.g., UNS S46910); precipitation‑hardening procedures to develop required mechanical properties.
• Required mechanical properties: tensile strength, yield strength, elongation, and hardness values in specified tempers/conditions.
• Forming and bendability requirements: samples from solution‑annealed material must withstand specified cold bending without outside cracking.
• Specified test methods and acceptance criteria: chemical analysis, tension tests, bend tests, hardness tests, and sampling rules.
• Marking and certification: supplier documentation and material traceability requirements (mill test reports / chemical and mechanical certificates) recommended or required by purchaser agreement.

Typical use and users

ASTM A693 materials are used where a combination of corrosion resistance and elevated strength is required in plate, sheet or strip form. Typical applications include aerospace and defense components, springs and high‑strength structural parts, fastener and hardware production, chemical and process equipment, and specialized industrial components. Primary users are material specifiers, metallurgists, fabricators, OEMs, quality engineers, procurement and inspection teams, and suppliers of PH stainless flat products.

Related standards

Standards commonly referenced alongside A693 include other ASTM and industry specifications for stainless steels and flat products (for example standards covering stainless plate/sheet/strip, heat‑treatment practices, and chemical/mechanical testing). Typical companion documents include ASTM specifications for stainless sheet and plate, ASTM test methods for tension, bend and hardness, and relevant industry specifications (e.g., AMS material specifications for 17‑4 PH / 17‑7 PH alloys). Users should check purchaser requirements and the ASTM Book of Standards index (volume covering stainless steels) for precise cross‑references.

Keywords

precipitation‑hardening, PH stainless, heat‑resisting steel, plate, sheet, strip, solution‑annealed, cold‑worked, precipitation hardening, 17‑4 PH, 17‑7 PH, Type 630, UNS S17400, mechanical properties, heat treatment, ASTM A693

FAQ

Q: What is this standard?

A: ASTM A693-24 is the ASTM International specification that defines requirements for precipitation‑hardening stainless and heat‑resisting steel supplied as plate, sheet, and strip, including composition, mechanical properties, and heat‑treatment conditions.

Q: What does it cover?

A: It covers alloy types/UNS designations, chemical composition limits, required mechanical properties (tensile, yield, elongation, hardness), recommended heat‑treatment conditions (solution‑anneal, cold work, precipitation harden), and acceptance tests (bend, tensile, hardness, chemical analysis) for plate, sheet and strip.

Q: Who typically uses it?

A: Material specifiers, engineers, fabricators, OEMs, metallurgists, suppliers of stainless flat products, and quality/inspection personnel use A693 to specify and verify precipitation‑hardening stainless steels for high‑strength, corrosion‑resistant applications.

Q: Is it current or superseded?

A: The A693-24 edition is the current ASTM edition published in 2024. Users should confirm with ASTM International or their standards library for any amendments or newer revisions after May 9, 2024.

Q: Is it part of a series?

A: A693 is issued by ASTM International and developed under the committee handling stainless and heat‑resisting steels; it appears in the ASTM Book of Standards volume covering stainless steels (Book of Standards volume 01.03) and is associated with subcommittee A01.17. It is commonly used alongside other ASTM specifications and test methods for stainless steels.

Q: What are the key keywords?

A: Precipitation‑hardening, PH stainless, heat‑resisting steel, plate, sheet, strip, solution‑annealed, precipitation hardening, 17‑4 PH, Type 630, UNS designations, mechanical properties, heat treatment.