Mechanical requirements scale drastically based on the selected aging cycle. The table below highlights the minimum mechanical properties specified by ASTM A564 for bars across various conditions: Tensile Strength, min (ksi / MPa) Yield Strength, 0.2% offset, min (ksi / MPa) Elongation in 2 in., min (%) Hardness (Rockwell C / Brinell) Condition A Report for record Report for record Report for record 363 HB / 38 HRC max H900 190 / 1310 170 / 1170 40 HRC / 388 HB min H1025 155 / 1070 145 / 1000 35 HRC / 331 HB min H1150 28 HRC / 277 HB min Industrial Applications
This chromium-nickel-aluminum stainless steel offers high strength and hardness alongside excellent fatigue properties.
This chromium-nickel-aluminum alloy is semi-austenitic. It provides exceptional fatigue resistance and high strength, making it the preferred choice for heavy-duty springs, aerospace components, and intricate surgical tools. Grade 670 (XM-12 / 15-5PH)
ASTM A564, formally titled the "Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes", is a globally recognized standard developed by ASTM International. First approved in 1966, it has been updated several times, with notable recent editions from 2019 and a new 2025 version that ensures the specification remains current with industry needs. astm a564 pdf
For Grade 630 (17-4PH), standard mechanical values scale across conditions: Condition A Condition H900 Condition H1150 190 ksi (1310 MPa) 135 ksi (930 MPa) Yield Strength (min) 170 ksi (1170 MPa) 105 ksi (724 MPa) Elongation in 2 in. (min) Hardness (Rockwell C) 38 HRC (max) 5. Chemical Composition Limits
that causes precipitation hardening of finely dispersed carbides. Applications
is the standard specification for hot-rolled and cold-finished age-hardening stainless steel bars and shapes . In plain English: It covers stainless steel that gets stronger after heat treatment. For Grade 630 (17-4PH), standard mechanical values scale
Precise limits for elements like chromium, nickel, copper, and columbium.
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As of 2024, the active revision is (Metric version). If you have a PDF from 2013, the H1150 heat treat condition changed by ±25°F. Using the wrong PDF could void your PPAP or NORSOK compliance. and minimal distortion during heat treatment.
The ASTM A564 PDF is a widely used document that provides detailed information on the standard specification. The PDF version of the specification is convenient to access and use, allowing engineers, designers, and manufacturers to quickly refer to the requirements and guidelines for age-hardening stainless steel bars and shapes.
Known for high fatigue resistance, excellent strength, and minimal distortion during heat treatment.