ALLOY STEEL PIPE/TUBE( ASTM A335, ASTM A213) for PETROLEUM, CHEMICAL AND ELECTRIC POWER INDUSTRIES,especially Large O.D. pipes: Cr5Mo (STFA25 STPA25 STBA25 T5 P5 ) 15CrMo (STFA22 STPA22 STBA22 T12 P12 ) 1.25Cr0.5Mo (STFA23 STPA23 STBA23 T11 P11 ) Cr9Mo (STFA26 STPA26 STBA26 T9 P9 ) 12Cr1MoV 12Cr2Mo (10CrMo910 T22 P22 ) T91 ( P91 )