Hardness comes down appreciably after PWHT, and this is required. Teat treatment (PWHT) is mostly done as a mandatory procedure in P91steel. Check your client requirements for hardness after PWHT
From: Ryan Carbonara <rcarbonara@valv.com>
To: materials-welding@googlegroups.com
Sent: Thursday, January 3, 2013 8:51 AM
Subject: [MW:16412] RE: 16411] HardnessP-91 Material
--Client call typically. You wont find it in B31.1
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Anthony Rudder
Sent: Wednesday, January 02, 2013 11:37 AM
To: materials-welding@googlegroups.com
Subject: [MW:16411] HardnessP-91 MaterialSir,What's the Max hardness for weld metal and HAZ for P-91 Material per B31.1Thank You,TonyQA.Manager.
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