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Q. Illustrate Brinell hardness tests?
Brinell hardness tests of the deposited weld, and heat affected zone shall be required for procedure qualifications of every welding process used. On production welds hardness tests shall be obtained from the weld metal and heat affected zone.
Material Group
Maximum Brinell Hardness
Carbon steel
P-1
200
Carbon-molybdenum
P-3
215
Chrome-molybdenum
P-4, P-5
225
Chrome stainless steel
P-6
P-7
235
Report all hardness readings in excess of values shown above to OWNER. Review any corrective action with OWNER before proceeding.
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