ASTM A312 - Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipe
Chemical Compositions (max %)
| Grade |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mo |
Ti |
Co |
Ta |
N |
| TP304 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
8.0-11.0 |
|
|
|
|
|
| TP304L |
0.035a |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
8.0-13.0 |
|
|
|
|
|
| TP304H |
0.04-0.10 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
8.0-11.0 |
|
|
|
|
|
| TP304N |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
8.0-18.0 |
|
|
|
|
0.10-0.16 |
| TP304LN |
0.035 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
8.0-12.0 |
|
|
|
|
0.10-0.16 |
| TP316 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0-18.0 |
11.0-14.0b |
2.00-3.00 |
|
|
|
|
| TP316L |
0.035a |
2.00 |
0.045 |
0.030 |
1.00 |
16.0-18.0 |
10.0-14.0 |
2.00-3.00 |
|
|
|
|
| TP316H |
0.04-0.10 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0-18.0 |
11.0-14.0b |
2.00-3.00 |
|
|
|
|
| TP316Ti |
0.08 |
2.00 |
0.045 |
0.030 |
0.75 |
16.0-18.0 |
10.0-14.0 |
2.00-3.00 |
5×(C+N) min, 0.70 |
|
|
0.1 |
| TP316N |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0-18.0 |
11.0-14.0b |
2.00-3.00 |
|
|
|
0.10-0.16 |
| TP316LN |
0.035 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0-18.0 |
11.0-14.0b |
2.00-3.00 |
|
|
|
0.10-0.16 |
| TP317 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
11.0-14.0 |
3.0-4.0 |
|
|
|
|
| TP317L |
0.035 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0-20.0 |
11.0-15.0 |
3.0-4.0 |
|
|
|
|
| TP321 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0-19.0 |
9.0-12.0 |
|
c |
|
|
0.1 |
| TP321H |
0.04-0.10 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0-19.0 |
9.0-12.0 |
|
d |
|
|
|
| TP347 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0-19.0 |
9.0-13.0 |
|
|
e |
|
|
| TP347H |
0.04-0.10 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0-19.0 |
9.0-13.0 |
|
|
f |
|
|
| TP348 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0-19.0 |
9.0-13.0 |
|
|
e |
0.1 |
|
| TP348H |
0.04-0.10 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0-19.0 |
9.0-13.0 |
|
|
f |
0.1 |
|
Notes:
a For small diameter or thin walls or both, where many drawing passes are required, a C maximum of 0.040 % is necessary in grades TP304L and TP316L. Small outside diameter tubes are defined as those less than 0.500 in. [12.7 mm] in outside diameter and light wall tubes as those less than 0.049 in. [1.20 mm] in average wall thickness (0.044 in. [1.10 mm] in minimum wall thickness).
b For welded TP316, TP316N, TP316LN, and TP316H pipe, the Ni range shall be 10.0–14.0 %.
c The Ti content shall be not less than five times the carbon content and not more than 0.70 %.
d The Ti content shall be not less than four times the carbon content and not more than 0.60 %.
e The Co content shall be not less than ten times the carbon content and not more than 1.00 %.
f The Co content shall be not less than eight times the carbon content and not more than 1.0 %.
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