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发表于 2020-5-24 18:35:48
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另外,ULT-56焊后热处理
(c) For Types 304 and 316 stainless steel vessels, the provisions of UHA-32 apply.
TABLE UHA-32-1
Postweld heat treatment is not required for vessels constructed of Type 410 material for SA-182 Grade F6a, SA-240, SA-268, and SA-479 with carbon content not to exceed 0.08% and welded with electrodes that produce an austenitic chromium–nickel weld deposit or a non゛ir﹉ardening nickel–chromium–iron weld deposit, provided the nominal thickness does not exceed 3 / 8in. (10 mm), and for nominal thicknesses over 3 / 8in. (10 mm) to 1 1 / 2 in. (38 mm) provided a preheat of 450°F (230°C) is maintained during welding and that the joints are completely radiographed.
根据描述,对于SA-240(304奥氏体不锈钢),含碳量不超过0.08%,而且厚度不超过10mm,才可以免除焊后热处理。这与我以前认识的奥氏体不锈钢和有色金属制压力容器焊接后一般不要求做焊后热处理有不同。 |
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