The "workhorse" grade used for pump shafts, valve stems, and aerospace components. Type 631 (17-7 PH): Known for high strength and spring properties. Type 634 (AM-350): Offers a good balance of strength and fabricability. XM-12 (15-5 PH):
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Unlike standard 304 or 316 stainless (which work-harden), A564 materials are precipitation-hardening (PH). They start soft for machining, then undergo a low-temperature heat treatment to achieve tensile strengths exceeding 150 ksi (1035 MPa). astm a564 pdf
Available in various conditions (Condition A, H900, H1025, etc.) to meet specific hardness and toughness requirements. Common Grades Covered Type 630 (17-4 PH):
Age‑hardening (also called precipitation‑hardening) is a heat‑treatment process that produces exceptionally high strength in stainless steels without sacrificing corrosion resistance. The process involves a solution‑annealing step followed by a controlled aging treatment that precipitates fine intermetallic particles, dramatically increasing strength and hardness. This family of materials offers a unique combination of: The "workhorse" grade used for pump shafts, valve
Once you open the official ASTM A564 PDF, do not skim. Lock in on these sections:
: Defined by Brinell (HBW) or Rockwell C (HRC) scales. XM-12 (15-5 PH): : Unlike standard 304 or
Before downloading the PDF, you must know which grade applies to your project. The standard lists numerous UNS designations. Below are the most requested grades found inside the :
Often used in aerospace, chemical processing, and structural components that require high hardness at temperatures up to 600°F (315°C). Product Forms:
Known for excellent machinability even in the fully heat-treated condition, this grade is specialized for parts requiring complex machining. Heat Treatment and Manufacturing (Based on ASTM A564 PDF)
A martensitic precipitation-hardening stainless steel containing 17% Chromium and 4% Nickel, along with copper and niobium.