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Carbon steel

01/10/2010 1:37 PM

We have Carbon steel piping for Boiler feed water having pressure of 100 bar and temp of 200 Degree C.

After welding of one joint PWHT done for this joint . So after PWHT what should be the hardness at that joint is acceptable.
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PWSlack
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#1

Re: Carbon steel

01/11/2010 3:21 AM

What does it say in the Piping Specification?

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Kwetz
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#2

Re: Carbon steel

01/13/2010 1:46 AM

As a rule of dumb, think in 350 HV maximum. Hardness less than that in carbon and low alloy steels use to be acceptable (not too martensite).

Kind regards

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