... time -Material: GR42, GR50, GR55, GR60, GR65 ASTM A335 is a ASTM standard specifies Seamless Ferritic Alloy Steel Pipe for High ... . Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.This specification covers seamless ferritic ... and hardness or bend test are presented.Mainly Grade of ASTM A335:ASTM A335 P11, P22, P5, P9, P91, P92Chemical ...