Hello everyone,
I need your assistance regarding the allowable stresses for austenitic steels.
In Table A-3, Note (10) states that for temperatures above 1000°F, the carbon content must be at least 0.04%.
This note applies to steels that are not low-carbon grades, which raises the question: Why is this requirement even mentioned?
After all, in standard (non-L) austenitic stainless steels, the carbon content is usually above 0.04%. So why is it necessary to specify this?
In addition, does this note serve as a limitation regarding the carbon content of the steel, and in effect prohibit the use of low-carbon grades ("L") or dual certified steels at temperatures above 1000°F?
Example:
Seamless Pipe and Tube: Austenitic
Spec. No. A312, Grade TP316 (first row) (% Carbon<0.08)
Applicable Note: 10
Allowable stress at 1,050°F = 11.1ksi.
Spec. No. A312, Grade TP316L (first row) (% Carbon<0.03)
Applicable Notes: 1, 29
Allowable stress at 1,050°F = 8.3ksi.
Thanks,
I need your assistance regarding the allowable stresses for austenitic steels.
In Table A-3, Note (10) states that for temperatures above 1000°F, the carbon content must be at least 0.04%.
This note applies to steels that are not low-carbon grades, which raises the question: Why is this requirement even mentioned?
After all, in standard (non-L) austenitic stainless steels, the carbon content is usually above 0.04%. So why is it necessary to specify this?
In addition, does this note serve as a limitation regarding the carbon content of the steel, and in effect prohibit the use of low-carbon grades ("L") or dual certified steels at temperatures above 1000°F?
Example:
Seamless Pipe and Tube: Austenitic
Spec. No. A312, Grade TP316 (first row) (% Carbon<0.08)
Applicable Note: 10
Allowable stress at 1,050°F = 11.1ksi.
Spec. No. A312, Grade TP316L (first row) (% Carbon<0.03)
Applicable Notes: 1, 29
Allowable stress at 1,050°F = 8.3ksi.
Thanks,
