UNS S41425 - NACE - FORONI SPA
UNS S41425 - NACE - FORONI SPA
(OP)
Hi All,
I would like to check what is the heating treatment of the following material - UNS S41425 under NACE compliant?
I can find non-nace heating treatment for UNS S41425, but not the NACE version in MRS0175.
I was told it was implemented by Foroni SPA, but I can't seen to find the document.
Please advise.
Thanks,
Jeffrey
I would like to check what is the heating treatment of the following material - UNS S41425 under NACE compliant?
I can find non-nace heating treatment for UNS S41425, but not the NACE version in MRS0175.
I was told it was implemented by Foroni SPA, but I can't seen to find the document.
Please advise.
Thanks,
Jeffrey





RE: UNS S41425 - NACE - FORONI SPA
Wrought low-carbon UNS S41425 martensitic stainless steel in the austenitized, quenched, and tempered condition shall have a maximum hardness of 28 HRC.
RE: UNS S41425 - NACE - FORONI SPA
You are right. But I am looking for the heat treatment procedures.
For S41427, the heating procedure is written in NACE but not for S41425. Thanks.
RE: UNS S41425 - NACE - FORONI SPA
RE: UNS S41425 - NACE - FORONI SPA
Nace has set the hardness to be at 28 hrc. But astm stated 32hrc instead. Therefore, i believe there must be guidelines to the heat treatment method.
RE: UNS S41425 - NACE - FORONI SPA
RE: UNS S41425 - NACE - FORONI SPA
You are right. I initially used the heating guideline from ASTSM A 473. However, as I need to compliant to the NACE hardness (29 HRC), I am searching for the heating procedure.
As you mentioned, instead of 1100 deg F, I should increase the temperature to 1250 deg F.
May I ask where can I achieve or obtain the document from?
Thanks for your help and many apologies for the late reply.
Jeffrey
RE: UNS S41425 - NACE - FORONI SPA
The 1250 deg F was based on a quick review of a technical paper on heat treatment and secondary hardening characteristics for similar grades of supermartensitic stainless steel. I would use the 1250 deg F as a guide and adjust or fine tune the actual tempering temperature.
RE: UNS S41425 - NACE - FORONI SPA