Chemical Requirements Austenitic Stainless Steels used in Piping applications

ASTM A182
Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service

Composition, %
Grade C Mn P S Si Ni Cr Mo Nb Ti Others
F304(1) 0.08 2.0 0.045 0.030 1.0 8.0-
11.0
18.0-
20.0
F304H 0.04-
0.10
2.0 0.045 0.030 1.0 8.0-
11.0
18.0-
20.0
F304L(1) 0.030 2.0 0.045 0.030 1.0 8.0-
13.0
18.0-
20.0
F304N(2) 0.08 2.0 0.045 0.030 1.0 8.0-
10.5
18.0-
20.0
F304LN(2) 0.030 2.0 0.045 0.030 1.0 8.0-
10.5
18.0-
20.0
F309H 0.04-
0.10
2.0 0.045 0.030 1.0 12.0-
15.0
22.0-
24.0
F310 0.25 2.0 0.045 0.030 1.0 19.0-
22.0
24.0-
26.0
F310H 0.04-
0.10
2.0 0.045 0.030 1.0 19.0-
22.0
24.0-
26.0
F310MoLN 0.030 2.0 0.030 0.015 0.40 21.0-
23.0
24.0-
26.0
2.0-
3.0
N 0.10-
0.16
F316 0.08 2.0 0.045 0.030 1.0 10.0-
14.0
16.0-
18.0
2.0-
3.0
F316H 0.04-
0.10
2.0 0.045 0.030 1.0 10.0-
14.0
16.0-
18.0
2.0-
3.0
F316L(1) 0.030 2.0 0.045 0.030 1.0 10.0-
15.0
16.0-
18.0
2.0-
3.0
F316N(2) 0.08 2.0 0.045 0.030 1.0 11.0-
14.0
16.0-
18.0
2.0-
3.0
F316LN(2) 0.030 2.0 0.045 0.030 1.0 11.0-
14.0
16.0-
18.0
2.0-
3.0
F316Ti 0.08 2.0 0.045 0.030 1.0 10.0-
14.0
16.0-
18.0
2.0-
3.0
(3) N 0.10
max
F317 0.08 2.0 0.045 0.030 1.0 11.0-
15.0
18.0-
20.0
3.0-
4.0
F317L 0.030 2.0 0.045 0.030 1.0 11.0-
15.0
18.0-
20.0
3.0-
4.0
F321 0.08 2.0 0.045 0.030 1.0 9.0-
12.0
17.0-
19.0
(4)
F321H 0.04-
0.10
2.0 0.045 0.030 1.0 9.0-
12.0
17.0-
19.0
(5)
F347 0.08 2.0 0.045 0.030 1.0 9.0-
13.0
17.0-
20.0
(6)
F347H 0.04-
0.10
2.0 0.045 0.030 1.0 9.0-
13.0
17.0-
20.0
(7)
F348 0.08 2.0 0.045 0.030 1.0 9.0-
13.0
17.0-
20.0
(6) Co 0.20
Ta 0.10
F348H 0.04-
0.10
2.0 0.045 0.030 1.0 9.0-
13.0
17.0-
20.0
(7) Co 0.20
Ta 0.10
Grade C Mn P S Si Ni Cr Mo Nb Ti Others

Notes:

  1. Grades F304, F304L, F316, and F316L shall have a maximum Nitrogen content of 0.10%.
  2. Grades F304N, F316N, F304LN, and F316LN shall have a Nitrogen content of 0.10 to 0.16%.
  3. Grade F316Ti shall have a Titanium content not less than five times the Carbon plus Nitrogen content and not more than 0.70%.
  4. Grade F321 shall have a Titanium content of not less than five times the Carbon content and not more than 0.70%.
  5. Grade F321H shall have a Titanium content of not less than four times the Carbon content and not more than 0.70%.
  6. Grades F347 and F348 shall have a Niobium content of not less than ten times the Carbon content and not more than 1.10%.
  7. Grades F347H and F348H shall have a Niobium content of not less than eight times the Carbon content and not more than 1.10%.

ASTM A312
Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

Composition, % (2)
Grade UNS(1) Designation C Mn P S Si Cr Ni Mo Ti Nb Ta
max
N
(3)
TP304 S3040 0.08 2.0 0.045 0.030 1.0 18.0-
20.0
8.0-
11.0
TP304L S30403 0.035
(4)
2.0 0.045 0.030 1.0 18.0-
20.0
8.0-
13.0
TP304H S30409 0.04-
0.10
2.0 0.045 0.030 1.0 18.0-
20.0
8.0-
11.0
TP304N S30451 0.08 2.0 0.045 0.030 1.0 18.0-
20.0
8.0-
18.0
0.10-
0.16
TP304LN S30453 0.035 2.0 0.045 0.030 1.0 18.0-
20.0
8.0-
12.0
0.10-
0.16
TP309S S30908 0.08 2.0 0.045 0.030 1.0 22.0-
24.0
12.0-
15.0
0.75
TP309H S30909 0.04-
0.10
2.0 0.045 0.030 1.0 22.0-
24.0
12.0-
15.0
TP309Cb S30940 0.08 2.0 0.045 0.030 1.0 22.0-
24.0
12.0-
16.0
0.75 10xC
min
1.10
max
TP309HCb S30941 0.04-
0.10
2.0 0.045 0.030 1.0 22.0-
24.0
12.0-
16.0
0.75 10xC
min
1.10
max
TP310S S3108 0.08 2.0 0.045 0.030 1.0 24.0-
26.0
19.0-
22.0
0.75
TP310H S3109 0.04-
0.10
2.0 0.045 0.030 1.0 24.0-
26.0
19.0-
22.0
TP310Cb S31040 0.08 2.0 0.045 0.030 1.0 24.0-
26.0
19.0-
22.0
0.75 10xC
min
1.10
max
TP310HCb S31041 0.04-
0.10
2.0 0.045 0.030 1.0 24.0-
26.0
19.0-
22.0
0.75 10xC
min
1.10
max
TP316 S3160 0.08 2.0 0.045 0.030 1.0 16.0-
18.0
11.0-
14.0
2.0-
3.0
TP316L S31603 0.035
(4)
2.0 0.045 0.030 1.0 16.0-
18.0
10.0-
14.0
2.0-
3.0
TP316H S31609 0.04-
0.10
2.0 0.045 0.030 1.0 16.0-
18.0
11.0-
14.0
2.0-
3.0
TP316Ti S31635 0.08 2.0 0.045 0.030 0.75 16.0-
18.0
10.0-
14.0
2.0-
3.0
5x
(C-N)
-0.70
0.10
TP316N S31651 0.08 2.0 0.045 0.030 1.0 16.0-
18.0
10.0-
14.0
2.0-
3.0
0.10-
0.16
TP316LN S31653 0.035 2.0 0.045 0.030 1.0 16.0-
18.0
11.0-
14.0
2.0-
3.0
0.10-
0.16
TP317 S3170 0.08 2.0 0.045 0.030 1.0 18.0-
20.0
10.0-
14.0
3.0-
4.0
TP317L S31703 0.035 2.0 0.045 0.030 1.0 18.0-
20.0
11.0-
15.0
3.0-
4.0
TP321 S3210 0.08 2.0 0.045 0.030 1.0 17.0-
19.0
9.0-
12.0
(7) 0.10
TP321H S32109 0.04-
0.10
2.0 0.045 0.030 1.0 17.0-
19.0
9.0-
12.0
(8) 0.10
TP347 S3470 0.08 2.0 0.045 0.030 1.0 17.0-
19.0
9.0-
13.0
(9)
TP347H S34709 0.04-
0.10
2.0 0.045 0.030 1.0 17.0-
19.0
9.0-
13.0
(10)
TP347LN S34751 0.05-
0.02
2.0 0.045 0.030 1.0 17.0-
19.0
9.0-
13.0
0.20-
50.0
(6-11)
0.06-
0.10
TP348 S3480 0.08 2.0 0.045 0.030 1.0 17.0-
19.0
9.0-
13.0
(9) 0.10
TP348H S34809 0.04-
0.10
2.0 0.045 0.030 1.0 17.0-
19.0
9.0-
13.0
(10) 0.10
Grade UNS(1) Designation C Mn P S Si Cr Ni Mo Ti Nb Ta
max
N
(3)

Notes:

  1. New designation established in accordance with Practice E 527 and SAE J1086.
  2. Maximum, unless otherwise indicated. Where elipses (…) appear in this table, there is no requirement and analysis for the element need not be determined or reported.
  3. The method of analysis for Nitrogen shall be a matter of agreement between the purchaser and manufacturer.
  4. For small diameter or thin walls or both, where many drawing passes are required, a Carbon maximum of 0.040% is necessary in grades TP304L and TP316L. Small outside diameter tubes are defined as those less than 0.50 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).
  5. For welded TP316, TP316N, TP316LN, and TP316H pipe, the Nickel range shall be 10.0-14.0%.
  6. For welded pipe, the Phosphorus maximum shall be 0.045%.
  7. The Titanium content shall be not less than five times the Carbon content and not more than 0.70%.
  8. The Titanium content shall be not less than four times the Carbon content and not more than 0.60%.
  9. The Niobium content shall be not less than ten times the Carbon content and not more than 1.0%.
  10. The Niobium content shall be not less than eight times the Carbon content and not more than 1.0%.
  11. Grade S34751 shall have a Niobium plus Tantalum content of not less than 15 times the Carbon content.

ASTM A351
Specification for Castings, Austenitic, for Pressure-Containing Parts

Composition. % (max. except whers range is given)
Grade UNS
Designation
C Mn Si S P Cr Ni Mo Nb V N Cu
CF3+CF3A J9270 0.03 1.5 2.0 0.040 0.040 17.0-
21.0
8.0-
11.0
0.50
CF8+CF8A J9260 0.08 1.5 2.0 0.040 0.040 18.0-
21.0
8.0-
11.0
0.50
CF3M+CF3MA J9280 0.03 1.5 1.50 0.040 0.040 17.0-
21.0
9.0-
13.0
2.0-
3.0
CF8M J9290 0.08 1.5 1.50 0.040 0.040 18.0-
21.0
9.0-
12.0
2.0-
3.0
CF3MN J92804 0.03 1.5 1.50 0.040 0.040 17.0-
21.0
9.0-
13.0
2.0-
3.0
0.10-
0.20
CF8C J92710 0.08 1.5 2.0 0.040 0.040 18.0-
21.0
9.0-
12.0
0.50 ( 1 )
CF10 J92950 0.04-
0.10
1.5 2.0 0.040 0.040 18.0-
21.0
8.0-
11.0
0.50
CF10M J92901 0.04-
0.10
1.5 1.50 0.040 0.040 18.0-
21.0
9.0-
12.0
2.0-
3.0
CH8 J9340 0.08 1.5 1.50 0.040 0.040 22.0-
26.0
12.0-
15.0
0.50
CH10 J93401 0.04-
0.10
1.5 2.0 0.040 0.040 22.0-
26.0
12.0-
15.0
0.50
CH20 J93402 0.04-
0.20
1.5 2.0 0.040 0.040 22.0-
26.0
12.0-
15.0
0.50
CK20 J94202 0.04-
0.20
1.5 1.75 0.040 0.040 23.0-
27.0
19.0-
22.0
0.50
HK30 J94203 0.25-
0.35
1.5 1.75 0.040 0.040 23.0-
27.0
19.0-
22.0
0.50
HK40 J94204 0.35-
0.45
1.5 1.75 0.040 0.040 23.0-
27.0
19.0-
22.0
0.50
HT30 N08030 0.25-
0.35
2.0 2.50 0.040 0.040 13.0-
17.0
33.0-
37.0
0.50
CF10MC 0.10 1.50 1.50 0.040 0.040 15.0-
18.0
13.0-
16.0
1.75-
2.25
( 2 )
CN7M N0807 0.07 1.50 1.50 0.040 0.040 19.0-
22.0
27.5-
30.5
2.0-
3.0
3.0-
4.0
CN3MN J94651 0.03
max
2.0
max
1.0
max
0.010
max
0.040
max
20.0-
22.0
23.5-
25.5
6.0-
7.0
0.18-
0.26
0.75
max
CE8MN 0.08 1.0 1.50 0.040 0.040 22.5-
25.5
8.0-
11.0
3.0-
4.5
0.10-
0.30
CG-6MMN J93790 0.06 4.0-
6.0
1.0 0.030 0.040 20.5-
23.5
11.5-
13.5
1.50-
3.0
0.10-
0.30
0.10-
0.30
0.20-
0.40
CG8M J9300 0.08 1.50 1.50 0.040 0.040 18.0-
21.0
9.0-
13.0
3.0-
4.0
CF10SMnN J92972 0.10 7.0-
9.0
3.50-
4.50
0.030 0.060 16.0-
18.0
8.0-
9.0
0.08-
0.18
CT15C N08151 0.05-
0.15
0.15-
1.50
0.50-
1.50
0.030 0.030 19.0-
21.0
31.0-
34.0
0.50-
1.50
CK-3MCuN J93254 0.025 1.20 1.0 0.010 0.045 19.5-
20.5
17.5-
19.5
6.0-
7.0
0.18-
0.24
0.50-
1.0
CE20N J92802 0.20 1.50 1.50 0.040 0.040 23.0-
26.0
8.0-
11.0
0.50 0.08-
0.20
CG3M J92999 0.03 1.50 1.50 0.040 0.040 18.0-
21.0
9.0-
13.0
3.0-
4.0
Grade UNS
Designation
C Mn Si S P Cr Ni Mo Nb V N Cu

Notes:

  1. Grade CF8C shall have a Niobium content of not less than 8 times the Carbon content but not over 1.00%.
  2. Grade CF10MC shall have a Niobium content of not less than 10 times the Carbon content butnot over 1.20%.

ASTM A403
Specification for Wrought Austenitic Stainless Steel Piping Fittings

Composition, %
Grade UNS
Designation
C
(1)
Mn
(1)
P
(1)
S
(1)
Si
(1)
Ni Cr Mo Ti N
(2)
Others
WPXM-19 S20910 0.06 4.0-
6.0
0.045 0.030 1.0 11.5-
13.5
20.5-
23.5
1.50-
3.0
0.20-
0.40
(3)
WP304 S3040 0.08 2.0 0.045 0.030 1.0 8.0-
11.0
18.0-
20.0
WP304L S30403 0.030
(4)
2.0 0.045 0.030 1.0 8.0-
12.0
18.0-
20.0
WP304H S30409 0.04-
0.10
2.0 0.045 0.030 1.0 8.0-
11.0
18.0-
20.0
WP304N S30451 0.08 2.0 0.045 0.030 1.0 8.0-
11.0
18.0-
20.0
0.10-
0.16
WP304LN S30453 0.030 2.0 0.045 0.030 1.0 8.0-
11.0
18.0-
20.0
0.10-
0.16
WP309 S3090 0.20 2.0 0.045 0.030 1.0 12.0-
15.0
22.0-
24.0
WP310S S3108 0.08 2.0 0.045 0.030 1.0 19.0-
22.0
24.0-
26.0
WPS31254 S31254 0.020 1.0 0.030 0.010 0.80 17.5-
18.5
19.5-
20.5
6.0-
6.5
0.18-
0.22
Cu
0.50-
1.0
WP316 S3160 0.08 2.0 0.045 0.030 1.0 10.0-
14.0
16.0-
18.0
2.0-
3.0
WP316L S31603 0.030
(4)
2.0 0.045 0.030 1.0 10.0-
14.0
(5)
16.0-
18.0
2.0-
3.0
WP316H S31609 0.04-
0.10
2.0 0.045 0.030 1.0 10.0-
14.0
16.0-
18.0
2.0-
3.0
0.10-
0.16
WP316N S31651 0.08 2.0 0.045 0.030 1.0 10.0-
13.0
16.0-
18.0
2.0-
3.0
0.10-
0.16
WP316LN S31653 0.030 2.0 0.045 0.030 1.0 10.0-
13.0
16.0-
18.0
2.0-
3.0
0.10-
0.16
WP317 S3170 0.08 2.0 0.045 0.030 1.0 11.0-
15.0
18.0-
20.0
3.0-
4.0
WP317L S31703 0.030 2.0 0.045 0.030 1.0 11.0-
15.0
18.0-
20.0
3.0-
4.0
WPS31725 S31725 0.030 2.0 0.045 0.030 1.0 13.5-
17.5
18.0-
20.0
4.0-
5.0
0.20
WPS31726 S31726 0.030 2.0 0.045 0.030 1.0 13.5-
17.5
17.0-
20.0
4.0-
5.0
0.10-
0.20
WPS31727 S31727 0.030 1.0 0.030 0.030 1.0 14.5-
16.5
17.5-
19.0
3.8-
4.5
0.15-
0.21
Cu
2.8-
4.0
WPS32053 S32053 0.030 1.0 0.030 0.010 1.0 24.0-
26.0
22.0-
24.0
5.0-
6.0
0.17-
0.22
WP321 S3210 0.08 2.0 0.045 0.030 1.0 9.0-
12.0
17.0-
19.0
(6)
WP321H S32109 0.04-
0.10
2.0 0.045 0.030 1.0 9.0-
12.0
17.0-
19.0
(7)
WPS33228 S33228 0.04-
0.08
1.0 0.020 0.015 0.30 31.0-
33.0
26.0-
28.0
Ce 0.05-
0.10
Al 0.025
Nb 0.6-
0.10
WPS34565 S34565 0.030 5.0-
7.0
0.030 0.010 1.0 16.0-
18.0
23.0-
25.0
4.0-
5.0
0.40-
0.60
Nb 0.10
WP347 S3470 0.08 2.0 0.045 0.030 1.0 9.0-
12.0
17.0-
19.0
(8)
WP347H S34709 0.04-
0.10
2.0 0.045 0.030 1.0 9.0-
12.0
17.0-
19.0
(9)
WP348 S3480 0.08 2.0 0.045 0.030 1.0 9.0-
12.0
17.0-
19.0
Nb+Ta=
103(C)-1.10
Ta 0.10
Co 0.20
WP348H S34809 0.04-
0.10
2.0 0.045 0.030 1.0 9.0-
12.0
17.0-
19.0
Nb+Ta=
83(C)-1.10
Ta 0.10
Co 0.20
WPS38815 S38815 0.030 2.0 0.040 0.020 5.5-
6.5
13.0-
17.0
13.0-
15.0
0.75-
1.50
Cu 0.75-
1.50
Al 0.30
Grade UNS
Designation
C
(1)
Mn
(1)
P
(1)
S
(1)
Si
(1)
Ni Cr Mo Ti N
(2)
Others

Notes:

  1. Maximum, unless otherwise indicated.
  2. The method of analysis for Nitrogen shall be a matter of agreement between the purchaser and manufacturer.
  3. Niobium 0.10-0.30%; Vanadium, 0.10-0.30%.
  4. For small diameter or thin walls, or both, where many drawing passes are required, a Carbon maximum of 0.040% is necessary in grades TP304L and TP316L. Small outside diameter tubes are defined as those less than 0.50 in. [12.7 mm] in outside diameter and light wall tubes as those less than 0.049 in. [1.24 mm] in average wall thickness.
  5. On pierced tubing, the Nickel may be 11.0-16.0%.
  6. 5X(C+N2)-0.70.
  7. 4X(C+N2)-0.70.
  8. The Niobium content shall be not less than ten times the Carbon content and not more than 1.10%.
  9. The Niobium content shall be not less than eight times the Carbon content and not more than 1.10%.