The weldability and properties of joints welded in new-generation creep resistant steels: HCM12A steel |
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| Authors: | J. Br zda |
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| Affiliation: | a Department of Investigations into Weldability and Welded Constructions, The Welding Institute. |
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| Abstract: | HCM12A (ASME T122) steel, containing 10-12% chromium and 2% tungsten, is made by the Japanese companies Sumitomo Metal Industries and Mitsubishi Heavy Industries, and is intended for fresh steam superheaters. The aim is to increase the resistance to corrosion at elevated temperatures over that of steels containing 9% chromium, e.g. P91, P92, and E911. This steel, a modification of HCM12 alloy, has a di-phase structure of tempered martensite and some 30% delta ferrite. The resistance to creep of HCM12 steel is higher than that of HCM12 alloy and is close to that of P92 material (see Fig. 8 in Ref. 7). Basic characteristics of HCM12A steel are quoted in an article published earlier. |
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