ASTM A213 alloy tube ASTM A213, ASTM A213 T91, ASTM A213 T22, ASTM A213 T12, ASTM A213 T11, ASTM A213 T9, ASTM A213 T5 ASTM A213 Standard covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes. Our products for ASTM A213 alloy steel tubes have been listed as follows: A STM A213 T911 Seamless alloy tube ASTM A213 T23 Seamless alloy tube ASTM A213 T17 Seamless alloy tube ASTM A213 T22 Seamless alloy pipe ASTM A213 T9 Alloy Steel tubes ASTM A213 T91 alloy tube ASTM A213 T24 Seamless alloy tube ASTM A213 T21 Seamless alloy tube ASTM A213 T11 Seamless boiler tube ASTM A213 T5 Superheater Tubes ASTM A213 T12 Seamless alloy tube ASTM A213 T91 Seamless alloy tube ASTM A213 T91 Standard covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes. Grades containing the letter H in their designation have requirements different from those of similar grades not containing the letter H. These different requirements prov...