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JIS G 3461 Seamless Carbon Bending Steel Tubing For Boiler / Heat Exchanger JIS G 3461 Seamless carbon Steel tubes for boiler and heat exchangerSize range:OD 5-420mm*WT0.5-50mmLength: 12000m below, or upon customer's requests.Application:for boiler and heat exchangerCHEMICAL COMPOSITION % maxSteel gradeCSiMnPSSTB 3400.180.350.30-0.600.350.35STB 4100.320.350.30-0.800.350.35STB 5100.250.351.00-1.500.350.35Remark:1. When the purchaser requires product analysis,the permissible

JIS G 3461 Seamless carbon Steel tubes for boiler and heat exchanger Size range:OD 5-420mm*WT0.5-50mm Length: 12000m below, or upon customer's requests. Application:for boiler and heat exchanger CHEMICAL COMPOSITION % max Steel grade C Si Mn P S STB 340 0.18 0.35 0.30-0.60 0.35 0.35 STB 410 0.32 0.35 0.30-0.80 0.35 0.35 STB 510 0.25 0.35 1.00-1.50 0.35 0.35 Remark: 1. When the purchaser requires product analysis,the permissible deviation for the values given above shall be as