[MW:20599] Material hardness of 514 GR F

Dear Experts

we try to qualify PQR of Material 16 mm 514 Gr F in 2G and 3G position.we did the testing of tensile test ,bend and hardness test.Tensile test and bending test is satisfactory but vickers hardness number is more in HAZ(i.e 322) .Here while doing welding of piece we maintain the preheat temperature of 400F and interpass temp of 200F.But according to client hardness should be 250 max.Can u advice me how to reduce the hadness in HAZ while doing welding of test piece.

Kindly advice me any method to maintain hardness 250.

Best Regards

Tahir Alam

Planning Engineer
Agam Tank Maintenance Group
Mobile : +(965)5150-1509

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