❌ Assuming "A564" guarantees magnetic permeability is low. (Hint: 17-4 is magnetic in H900).
You order "17-4 Stainless." The mill sends "Condition A" (annealed). You try to machine it, and it’s gummy. 🥴 Because you forgot to specify the heat treat condition.
👉 I’ve extracted the specific Table 3 (Mechanical Properties) from the latest ASTM A564 revision. [Link to your PDF or comment "SEND" for a copy] astm a564 pdf
"17-4" is a nickname. The law is ASTM A564/A564M (Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars).
If you are specifying Type 630 (17-4 PH) for shafts, gears, or aerospace fittings, you need —not just a mill cert. ❌ Assuming "A564" guarantees magnetic permeability is low
Headline: Stop overpaying for 17-4 PH stainless steel. Read the spec first. 🛑
I’ve seen too many buyers just ask for "Condition H900" without verifying the mechanical limits. Here is why the is your best friend for the next RFQ: You try to machine it, and it’s gummy
Need the latest PDF with the 2023 revisions? Save this post & DM me "A564" for the link. 🔗 Option 3: Short Technical Note (For Email Newsletter or WhatsApp Group) Subject: Don't trust the nickname, trust the ASTM A564 PDF.
