Regular and Controlled Carbon Grades of Stainless Steels Such as Types

Regular and controlled carbon grades of stainless steels such as types 304/304H and 316/316H are particularly susceptible to sensitization in the weld HAZ. Low carbon "L" grades are less susceptible and usually can be welded without sensitizing. The "L" grades will not sensitize provided long term operating temperatures do not exceed about __________.

A) 700º F
B) 750º F
C) 800º F
D) 900º F