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Specifications, Types and Standards
order number product variety main steel grade standard
1 mechanical processing tube 20#,35#,45#,42CrMo,40Cr GB/T8162-2008
2 hydraulic prop tube 27SiMn GB/T17396-1998
3 low and medium pressure boiler tube 20G GB3087-2008
4 high pressure boiler tube 20G,15CrMoG GB5310-1999
5 car bridge tube 20Mn2 agreement
6 cylinder tube 35#,27SiMn agreement
7 oil cracking tube 12CrMo GB9948
8 Fertilizer tube 12CrMo,15CrMo GB6479
9 Drill collar tube AISI,4145H,1340 agreement
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