Illustrate brinell hardness tests, Mechanical Engineering

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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

225

Chrome stainless steel

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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