17-4 PH is the code name in which specification? What does PH mean?
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As for the title, can anyone explain it? Baidu searched for 2 hours and couldn't find it. Which standard is 17-4 PH? What does PH mean?
17-4PH alloy is a precipitation, hardening, martensitic stainless steel composed of copper, niobium/columbium. Relevant standards can refer to GB/T1220, GB/T1221, ASTM A546 A630, and S51740. You can also refer to the article specifications for trial guidance of 17-4PH cast valve stems
PH refers to precipitation hardening (precipitation hardening) 17-4PH refers to semi-austenitic hardening stainless steel specification. The American standard is ASTM A564 630 (UNS 17400)
17-4PH American brand SUS630 (0Cr17NiCu4Nb) heat treatment system and mechanical properties of precipitation hardened steel. 17-4PH was successfully developed by an American company in 1934. The trademark now belongs to the American ARMCO company. Similar brands in China: 0Cr17Ni4Cu4Nb United States: 17-4PH, AISI630 Japan: SUS630。
I understand the meaning of PH, thanks for the reply. I was thinking about this yesterday, but I didn't think of precipitation hardening. . . . But I have a question. There is only 17400 in A564. Where can I see the writing of 17-4, or 18-8? This is the industry * Is it customary, or has this been written in any old standard?
With everyone's replies, I will search again and find the answer. It is 17-4PH.* Conventional expressions 17 and 4 respectively indicate the percentage of Cr and Ni, and PH refers to the precipitation hardening type, that is,: Precipitation hardened The ASTM A564 specification stipulates that the heat treatment of 630 is solution treatment or age-hardened treatment ( 5.1.1.1 Types 630, XM-16, and XM-25 may be furnished in the solution-annealed or age-hardened condition.) Precipitation hardening process: Solid solution + age hardening
If you find one in China, then find one abroad. The foreign ones are still accurate, and a screenshot explains the problem clearly.
Which standard? Can you send me a standard number?