The chemical composition of an inspection, according to the chemical composition and mechanical properties of the domestic supply of Island P91 alloy tube t91, such as the chemical composition of the steel 10,15,20,25,30,35,40,45 No. 50 and should be consistent with GB / T699- 88 requirements. Imported P91 alloy tube according to the provisions of the contract relating to the standard test. Chemical composition 09MnV, 16Mn, 15MnV steel shall conform to GB1591-79 of. 2, the specific reference analytical methods GB223-84 "steel and alloy chemical analysis methods," the relevant section. .3, Analytical bias reference GB222-84 "steel chemical assays and chemical composition of the finished product tolerance." 3 t91, alloy tube alloy pipe welding procedure specifications specifications for increasing argon protected areas and enhance the protective effect of imports t91, can use large-diameter welded *** porcelain mouth, increased weld *** argon gas flow. When there is an obvious obstacle to the flow of argon gas flow to the nozzle when the spatter adhesion. You must remove or replace the nozzle spatter. When the tungsten tip pollution occurs, irregular and other phenomena must be trimmed or replaced. Tungsten should not extend outside of the nozzle. Control of welding temperature is mainly to control the welding speed and welding current size. The results showed that t91 steel, high current, fast welding can effectively prevent the generation of holes. This is mainly due to the welding process at a faster rate of penetration welding, the molten metal heating time is short, less chance to absorb gases. Specifications Length Weight Material alloy tube 10CrMo910 42 * 5 6000 1.053 10CrMo910 102 * 5 8000 0.867 10CrMo910 133 * 14.2 5850 5. 85 10CrMo910 160.3 * 13 7500 1.360 10CrMo910 168.3 * 30 5000 0.853 10CrMo910 219.1 * 14 8000 5.66 10CrMo910 219.1 * 32 8000 15.35 10CrMo910 219.1 * 36 8000 12.99 10CrMo910 273 * 8.8 7000 7.50 10CrMo910 273 * 10 8000 4.71 10CrMo910 273 * 16 8000 8.112 10CrMo910 273 * 28 8000 52.78 10CrMo910 273 * 32 8000 15.21 10CrMo910 273 * 40 8000 71.70 10CrMo910 273 * 45 7000 15.94 10CrMo910 273 * 508 000 21.99 import t91, Sanming t91, Katherine source of steel provided by source Pipe Co., Ltd. Liaocheng trillion. Liaocheng Katherine source Pipe Co., Ltd. (www.lczygg.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Katherine source of innovative ideas will lead pipe and you work into the brilliant, for a better future!