... DIN, Chinese GB/T, BS standard5. Main Material:Carbon Steel & Low Alloy steel. ASTM A53, A106, A210 etc; JIS STPG42, G3454 ... , oil, gas etcCan be used in low and medium pressure boiler for the transportation of fluids, for example steam tube, big smoke tube, small ... your reference.12. Chemical composition:Please See below. ASTM A210 Low Alloy Seamless Boiler Steel Pipe