for 17-4PH bars (ASTM A564 Type 630).
Trusted technical document clearinghouses like IHS Markit, Techstreet, and ANSI also sell authorized, authenticated copies of the standard.
Because precipitation-hardening steels are magnetic (unlike 304), they are used in food cutting blades where sanitation is critical, but magnetic separation is needed.
The standard includes numerous alloys, but the most prominent are precipitation-hardening (PH) stainless steels.
Aged at 1025°F (552°C) for 4 hours, air cool. A balanced condition offering high strength with improved ductility. astm a564 pdf
This means these grades are best suited for small‑diameter bars and wire forms, such as springs, rather than large forgings or heavy structural sections.
The specification explicitly states maximum service temperatures:
Navigate to the ASTM International standard store.
If you only need to look up one hardness value for a hobby project, try to borrow a copy from a local technical library or a client. The price is steep for casual use. for 17-4PH bars (ASTM A564 Type 630)
Known for high fatigue resistance, excellent strength, and minimal distortion during heat treatment.
What is the primary (e.g., saltwater, high temperature, acids)?
ASTM A564 is a standard specification published by the American Society for Testing and Materials (ASTM) that outlines the requirements for age-hardening stainless steel bars and shapes. The specification covers various grades of stainless steel, which are designed to provide high strength, corrosion resistance, and durability.
ASTM A564 covers a wide variety of wrought product forms. These include hot-finished or cold-finished rounds, squares, hexagons, bar shapes, angles, tees, and channels. They can be produced by hot rolling, extruding, or forging. Billets or bars for reforging may also be purchased to this specification. The standard includes numerous alloys, but the most
If you do not need to save the file, the ASTM website allows you to purchase a "24-hour access" pass for a lower fee ($30–$40). You can view the PDF in your browser but cannot print or save it permanently. This is ideal for a quick lookup of a specific heat treatment table.
| Element | Composition (%) | |:---|:---:| | Carbon (C) | 0.07 max | | Chromium (Cr) | 15.0 - 17.5 | | Nickel (Ni) | 3.0 - 5.0 | | Copper (Cu) | 3.0 - 5.0 | | Manganese (Mn) | 1.0 max | | Silicon (Si) | 1.0 max | | Columbium + Tantalum (Cb+Ta) | 0.15 - 0.45 | | Phosphorus (P) | 0.04 max | | Sulfur (S) | 0.03 max | | Iron (Fe) | Balance |
Mixers, heat exchanger components, and storage vessel fixtures exposed to corrosive compounds.