TBT1979 Standard specifies Technical specification for the procurement of atmospheric corrosion resisting steel for railway rolling stock.TBT1979 standard main steel grade:05CuPCrNi,09CuPCrNi-B,09CuPTiRE-B,09CuPTiRE-A,08CuPVRE,09CuPCrNi-A and so on.