Xi'an Linkun Materials Co.,Ltd is one of the leading China astm a250 alloy boiler tube manufacturers and suppliers,Website: , if you want to buy or import best high-quality astm a250 alloy boiler tube, a250 t1b alloy steel tube, a250 t2 alloy steel tube, a250 t11 alloy steel tube, a250 t12 alloy steel tube, a250 t22 alloy steel tube professional company, factory, seller, and exporter, or if you are checking astm a250 alloy boiler tube brands, please feel free to contact us. ASTM A250 T1 T1a T1b T2 T11 T12 T22 alloy steel tubes 1)Size: OD 1/2in-5in(12.7-127mm),Wall thickness: 0.035in-0.320in(0.9-8.1mm) 2)Manufacturing Process: Electric-resisitance welding 3)Heat treatment: 1. After welding,or when cold finished ,afterthe final cold-drawing pass,all tubes shall be heat treated and,except asprovided in5.3.2.furnished in the full annealed,isothermal annealed,normalized,or normalized and tempered condition at the option of the manufacturer,iffurnished in the normalized and tempered condition,the minimum temperingtemperature shall be 1200°F(350℃) except T22 shall be tempered at 1250°（676℃）minimum. 2. when grades T1.T1a,T1b and T2 are coldfinished,the tubes may at the option of the manufacturer,be heat treated afterthe final cold-drawing pass at a temperature of 1200°F or higher,provided one of the heat treatments specified in 5.3.1 wasapplied after welding 4)Mechanical Tests Required: Flattenting Test Flange test Reverse flattening test Hardness test Hydrostatic or Nondestructive Electric test