Seamless steel tubes for coal mining- GB/T 17396-2009

Overview Application Seamless steel pipe for coal mine is mainly used to manufacture seamless pipe for hydraulic prop in coal mine. Main Grade Grade of high-quality carbon structural steel: 20#、35# Chemical Component   C Si Mn Nb RE Cr Ni Cu Mo P S 20 0.17-0.23 0.17-0.37 0.35-0.65 一 一 <0. 25 <0. 25 <0. 20 一 <0. 035 <0. 035 35 0.32-0.39 0.17—0. 37 0. 50一0.8 一 一 <0. 25 <0. 25 <0. 20 一 <0. 035 <0. 035 45 0.42-0.50 0.17 一0. 37 0.50 一0.8 一 一 <0. 25 WO. 25 WO. 20 一 <0. 035 <0. 035 27SiMn 0.24-0.32 1.10 一1.4 1.10 一1.4 一 一 W0. 30 <0.30 <0. 20 <0.15 <0. 035 <0. 035 30MnNbREa 0.27-0.36 0. 20一0. 60 1.20 一1. 60 0.020一0. 050 0. 02一0. 04 <0.30 <0.30 <0. 20 <0.15 <0. 035 <0. 035 a The content of re is calculated as 0.02% ~ 0.04% added to the molten steel. Mechanical Property Mechanical Property Grade Tensile strength Yield Elong after fracture Reduction of area Shork absorption energy （KV2）/J Rm/MPa MPa A/% Z/%   Steel tube wall thickness/mm       <16 >16 〜30 >30     no more less 20 410 245 235 225 20 —   35 510 305 295 285 17 — — 45 590 335 325 315 14 — — 27SiMn 980 835 12 40 39 30MnNbRE 850 720 13 45 48 Test Requirement In addition to ensuring the chemical composition and mechanical properties, the steel pipe directly rolled with ingot shall be subject to low power inspection. Supply Ability Supply Ability: 2000 Tons Per Month Per Grade of   Seamless steel tubes for coal mining. Packaging In Bundles And In Strong Wooden Box Delivery 7-14 days if in stock, 30-45 days to produce Payment 30% depsoit, 70% L/C or B/L copy   or  100% L/C at sight Product Detail mechanical/Chemical&Fertilizer Pipes  GB/T8162-2008 ASTM_A519-2006  BS EN 10210-1-2006  ASTM A53A53M-2012  GB9948-2006  GB6479-2013  GB/T 17396-2009