P91 to P22 Tensile Test Question
P91 to P22 Tensile Test Question
(OP)
We recently welded a specimen for procedure qualification for a SA-335 P91 to SA-335 P22 procedure. The procedure was performed on 6" Sch. 160 pipe with ER90S-B3 root and E9018-B3. Sample was PWHT at 1350F for 2 hr. Ramps were between 500F and 600F above 600F. The Tensile specimens came back as breaking at 96KSI and 98KSI, ductile in base metal. The P22 was confirmed by composition. MTR showed that the original P22 pipe had 74ksi as Tensile. Bend test passed.
Any ideas as to how the P22 became a 96KSI material?
Any ideas as to how the P22 became a 96KSI material?





RE: P91 to P22 Tensile Test Question
"Whom the gods would destroy, they first make mad "
RE: P91 to P22 Tensile Test Question
RE: P91 to P22 Tensile Test Question
RE: P91 to P22 Tensile Test Question
RE: P91 to P22 Tensile Test Question
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: P91 to P22 Tensile Test Question
Point of gentle clarification, physical constraint will effect yield strength as you are well aware based on plane stress versus plane strain behavior of metals. Tensile strength is unaffected.