Name UNS ApplicationsASTM JIS KSCarbon Steel A179/192 STB340/510 STBH340/510For boiler and exchanger tubesAlloy SteelA213T5/T22 STBA12/26 STHA12/26A334G3/G11 STBL380/690 STLT39/70 For low temperature service(under 0
For boiler and exchanger tubes
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