LahaneD
Mechanical
- Sep 8, 2010
- 23
I have checked hardness of equipment after PWHT with portable hardness tester(Equotip). The thickness of CS equipment(A106 Gr B/A105) was 9.53 mm & hardness of PM was 110-115 BHN.
I thought that tensile property of equipment may have dropped down to its min requirement so I simulate a test piece.
The test piece was send to test lab for hardness check . surprisingly the hardness value were 135-140 BHN.
So my conclusion is that portable hardness tester is not reliable.
Can anybody suggest the reliable hardness measurement on equipment?
I thought that tensile property of equipment may have dropped down to its min requirement so I simulate a test piece.
The test piece was send to test lab for hardness check . surprisingly the hardness value were 135-140 BHN.
So my conclusion is that portable hardness tester is not reliable.
Can anybody suggest the reliable hardness measurement on equipment?
