... .surface treatment:oiled, varnish,passivation etc. APPLICATION:For Boiler,Superheater and Heat-Exchanger.Production Standard,Steel No.ASTM A213 T11 ... 1,TC1,TC2JIS G3462 STBA 12,STBA13,STBA24Delivery ConditionNormalized and TemperedInspections and tests performedChemical Composition Inspection,Mechanical Properties Test(Tensile ... RangeO.D 19.05-101.6mmW.T 2-12mm Boiler and Superheater Alloy steel tubes