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Heat treatment

Apost-weld heat treatment is generally not required. For compo- nents with non-homogeneous stress distribution, stress relieving at 1,000°C may be desirable. Different temperature zones in a plant often require dissimilar materials, e.g. ferritic or martensitic steels, to be joined with austenitic materials. The welding materi- als and parameters used for such dissimilar welds must be care- fully selected to match the properties of both materials. This also applies to post-weld heat treatment (if required). our stainless steels and nickel base alloys listed in this brochure all exhibit the high strength characteristics over a wide temperature range whilst providing excellent resistance to aggressive media in boilers and superheater pipes under both short-term and long-term stress. in addition, their physical properties and processing characteristics have typically helped to improve the efficiency and reliability of power stations over a long service life.

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