ASTM A213 T91 Seamless alloy tube
alloy steel, ASTM A213, ASTM A213 T91, Seamless alloy tube, steel
tubes, superheater tubes, t91, Tubing
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 provide higher creep-rupture strength
than normally achievable in similar grades without these different