... GB/T8162Machine elements,pipe fittings,netware 140-340 6-35 35#,45#,27SiMn,20SiMn4,30CrMo4 GB/T17396Mining machinery ... manufacturePetroleum cracking tube140-340 6-35 20#,16Mn,12CrMo,15CrMo,T5,T9 GB9948ASMESA213 ... Cracked stillHigh-pressure fertilizer pipe140-340 6-35 20#,16Mn,12CrMo,15CrMo GB6479Chemical fertilizer equipmentsAutomobile ...