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BHN Hardness of A106 Gr B Hot Bend.

BHN Hardness of A106 Gr B Hot Bend.

BHN Hardness of A106 Gr B Hot Bend.

(OP)
If a bend was found to have a 371 BHN after bending, and no stress relief is called for, what would be the concern's??

RE: BHN Hardness of A106 Gr B Hot Bend.

371BHN is around 3X the min TS listed for A106 gr.B (182ksi vs 60ksi). Are you sure your BHN value is correct?

RE: BHN Hardness of A106 Gr B Hot Bend.

(OP)
Yes we are sure there are actually 4 of 7 like that?

RE: BHN Hardness of A106 Gr B Hot Bend.

At this hardness, the bend must have been quenched after hot forming. The concern would be low notch toughness or stress corrosion cracking depending on service conditions.

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