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Materials

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, %
Gr. C Mn P S Si Ni
F 304 (1) 0.08 2.0 0.045 0.03 1.0 8.0
11.0
F 304 H 0.04
0.10
2.0 0.045 0.03 1.0 8.0
11.0
F 304 L (1) 0.03 2.0 0.045 0.03 1.0 8.0
13.0
F 304N (2) 0.08 2.0 0.045 0.03 1.0 8.0
10.5
F 304 LN (2) 0.03 2.0 0.045 0.03 1.0 8.0
10.5
F 309 H 0.04
0.10
2.0 0.045 0.03 1.0 12.0
15.0
F 310 0.25 2.0 0.045 0.03 1.0 19.0
22.0
F 310 H 0.04
0.10
2.0 0.045 0.03 1.0 19.0
22.0
F 310 MoLN 0.03 2.0 0.03 0.015 0.40 21.0
23.0
F 316 0.08 2.0 0.045 0.03 1.0 10.0
14.0
F 316 H 0.04
0.10
2.0 0.045 0.03 1.0 10.0
14.0
F 316 L (1) 0.03 2.0 0.045 0.03 1.0 10.0
15.0
F 316N (2) 0.08 2.0 0.045 0.03 1.0 11.0
14.0
F 316 LN (2) 0.03 2.0 0.045 0.03 1.0 11.0
14.0
F 316 Ti 0.08 2.0 0.045 0.03 1.0 10.0
14.0
F 317 0.08 2.0 0.045 0.03 1.0 11.0
15.0
F 317 L 0.03 2.0 0.045 0.03 1.0 11.0
15.0
F 321 0.08 2.0 0.045 0.03 1.0 9.0
12.0
F 321 H 0.04
0.10
2.0 0.045 0.03 1.0 9.0
12.0
F 347 0.08 2.0 0.045 0.03 1.0 9.0
13.0
F 347 H 0.04
0.10
2.0 0.045 0.03 1.0 9.0
13.0
F 348 0.08 2.0 0.045 0.03 1.0 9.0
13.0
F 348 H 0.04
0.10
2.0 0.045 0.03 1.0 9.0
13.0
Gr. C Mn P S Si Ni
Composition, %
Gr. Cr Mo Nb Ti Others
F 304 (1) 18.0
20.0
       
F 304 H 18.0
20.0
       
F 304 L (1) 18.0
20.0
       
F 304N (2) 18.0
20.0
       
F 304 LN (2) 18.0
20.0
       
F 309 H 22.0
24.0
       
F 310 24.0
26.0
       
F 310 H 24.0
26.0
       
F 310 MoLN 24.0
26.0
2.0
3.0
    N 0.10
0.16
F 316 16.0
18.0
2.0
3.0
     
F 316 H 16.0
18.0
2.0
3.0
     
F 316 L (1) 16.0
18.0
2.0
3.0
     
F 316N (2) 16.0
18.0
2.0
3.0
     
F 316 LN (2) 16.0
18.0
2.0
3.0
     
F 316 Ti 16.0
18.0
2.0
3.0
  (3) N 0.10
max
F 317 18.0
20.0
3.0
4.0
     
F 317 L 18.0
20.0
3.0
4.0
     
F 321 17.0
19.0
    (4)  
F 321 H 17.0
19.0
    (5)  
F 347 17.0
20.0
  (6)    
F 347 H 17.0
20.0
  (7)    
F 348 17.0
20.0
  (6)   Co 0.20
Ta 0.10
F 348 H 17.0
20.0
  (7)   Co 0.20
Ta 0.10
Gr. 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)
Gr. UNS (1) Des. C Mn P S Si Cr
TP 304 S 304
0
0.08 2.0 0.045 0.03 1.0 18.0
20.0
TP 304 L S 304
03
0.035
(4)
2.0 0.045 0.03 1.0 18.0
20.0
TP 304 H S 304
09
0.04
0.10
2.0 0.045 0.03 1.0 18.0
20.0
TP 304 N S 304
51
0.08 2.0 0.045 0.03 1.0 18.0
20.0
TP 304 LN S 304
53
0.035 2.0 0.045 0.03 1.0 18.0
20.0
TP 309 S S 309
08
0.08 2.0 0.045 0.03 1.0 22.0
24.0
TP 309 H S 309
09
0.04
0.10
2.0 0.045 0.03 1.0 22.0
24.0
TP 309
Cb
S 309
40
0.08 2.0 0.045 0.03 1.0 22.0
24.0
TP 309 HCb S 309
41
0.04
0.10
2.0 0.045 0.03 1.0 22.0
24.0
TP 310 S S 310
8
0.08 2.0 0.045 0.03 1.0 24.0
26.0
TP 310 H S 310
9
0.04
0.10
2.0 0.045 0.03 1.0 24.0
26.0
TP 310 Cb S 310
40
0.08 2.0 0.045 0.03 1.0 24.0
26.0
TP 310 HCb S 310
41
0.04
0.10
2.0 0.045 0.03 1.0 24.0
26.0
TP 316 S 316
0
0.08 2.0 0.045 0.03 1.0 16.0
18.0
TP 316 L S 316
03
0.035
(4)
2.0 0.045 0.03 1.0 16.0
18.0
TP 316 H S 316
09
0.04
0.10
2.0 0.045 0.03 1.0 16.0
18.0
TP 316 Ti S 316
35
0.08 2.0 0.045 0.03 0.75 16.0
18.0
TP 316 N S 316
51
0.08 2.0 0.045 0.03 1.0 16.0
18.0
TP 316 LN S 316
53
0.035 2.0 0.045 0.03 1.0 16.0
18.0
TP 317 S 317
0
0.08 2.0 0.045 0.03 1.0 18.0
20.0
TP 317 L S 317
03
0.035 2.0 0.045 0.03 1.0 18.0
20.0
TP 321 S 321
0
0.08 2.0 0.045 0.03 1.0 17.0
19.0
TP 321 H S 321
09
0.04
0.10
2.0 0.045 0.03 1.0 17.0
19.0
TP 347 S 347
0
0.08 2.0 0.045 0.03 1.0 17.0
19.0
TP 347 H S 347
09
0.04
0.10
2.0 0.045 0.03 1.0 17.0
19.0
TP 347 LN S 347
51
0.05
0.02
2.0 0.045 0.03 1.0 17.0
19.0
TP 348 S 348
0
0.08 2.0 0.045 0.03 1.0 17.0
19.0
TP 348 H S 348
09
0.04
0.10
2.0 0.045 0.03 1.0 17.0
19.0
Gr. UNS (1) Des. C Mn P S Si Cr
Composition, % (2)
Gr. UNS (1) Des. Ni Mo Ti Nb Ta
max
N
(3)
TP 304 S 304
0
8.0
11.0
         
TP 304 L S 304
03
8.0
13.0
         
TP 304 H S 304
09
8.0
11.0
         
TP 304 N S 304
51
8.0
18.0
        0.10
0.16
TP 304 LN S 304
53
8.0
12.0
        0.10
0.16
TP 309 S S 309
08
12.0
15.0
0.75        
TP 309 H S 309
09
12.0
15.0
         
TP 309
Cb
S 309
40
12.0
16.0
0.75   10xC
min
1.10
max
   
TP 309 HCb S 309
41
12.0
16.0
0.75   10xC
min
1.10
max
   
TP 310 S S 310
8
19.0
22.0
0.75        
TP 310 H S 310
9
19.0
22.0
         
TP 310 Cb S 310
40
19.0
22.0
0.75   10xC
min
1.10
max
   
TP 310 HCb S 310
41
19.0
22.0
0.75   10xC
min
1.10
max
   
TP 316 S 316
0
11.0
14.0
2.0
3.0
       
TP 316 L S 316
03
10.0
14.0
2.0
3.0
       
TP 316 H S 316
09
11.0
14.0
2.0
3.0
       
TP 316 Ti S 316
35
10.0
14.0
2.0
3.0
5x
(C-N)
-0.70
    0.10
TP 316 N S 316
51
10.0
14.0
2.0
3.0
      0.10
0.16
TP 316 LN S 316
53
11.0
14.0
2.0
3.0
      0.10
0.16
TP 317 S 317
0
10.0
14.0
3.0
4.0
       
TP 317 L S 317
03
11.0
15.0
3.0
4.0
       
TP 321 S 321
0
9.0
12.0
  (7)     0.10
TP 321 H S 321
09
9.0
12.0
  (8)     0.10
TP 347 S 347
0
9.0
13.0
    (9)    
TP 347 H S 347
09
9.0
13.0
    (10)    
TP 347 LN S 347
51
9.0
13.0
    0.20
50.0
(6-11)
  0.06
0.10
TP 348 S 348
0
9.0
13.0
    (9) 0.10  
TP 348 H S 348
09
9.0
13.0
    (10) 0.10  
Gr. UNS (1) Des. 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)
Gr. UNS
Des.
C Mn Si S P Cr
CF 3 CF 3A J 92 70 0.03 1.5 2.0 0.040 0.040 17.0
21.0
CF 8 CF8A J 92 60 0.08 1.5 2.0 0.040 0.040 18.0
21.0
CF 3 M CF3 MA J 92 80 0.03 1.5 1.50 0.040 0.040 17.0
21.0
CF 8 M J 92 90 0.08 1.5 1.50 0.040 0.040 18.0
21.0
CF 3 MN J 92 804 0.03 1.5 1.50 0.040 0.040 17.0
21.0
CF 8 C J 92 710 0.08 1.5 2.0 0.040 0.040 18.0
21.0
CF 10 J 92 950 0.04
0.10
1.5 2.0 0.040 0.040 18.0
21.0
CF 10 M J 92 901 0.04
0.10
1.5 1.50 0.040 0.040 18.0
21.0
CH 8 J 93 40 0.08 1.5 1.50 0.040 0.040 22.0
26.0
CH 10 J 93 401 0.04
0.10
1.5 2.0 0.040 0.040 22.0
26.0
CH 20 J 93 402 0.04
0.20
1.5 2.0 0.040 0.040 22.0
26.0
CK 20 J 94 202 0.04
0.20
1.5 1.75 0.040 0.040 23.0
27.0
HK 30 J 94 203 0.25
0.35
1.5 1.75 0.040 0.040 23.0
27.0
HK 40 J 94 204 0.35
0.45
1.5 1.75 0.040 0.040 23.0
27.0
HT 30 N0 80 30 0.25
0.35
2.0 2.50 0.040 0.040 13.0
17.0
CF 10 MC   0.10 1.50 1.50 0.040 0.040 15.0
18.0
CN 7 M N0 807 0.07 1.50 1.50 0.040 0.040 19.0
22.0
CN 3 MN J 94 651 0.03
max
2.0
max
1.0
max
0.010
max
0.040
max
20.0
22.0
CE 8 MN   0.08 1.0 1.50 0.040 0.040 22.5
25.5
CG 6 MMN J 93 790 0.06 4.0
6.0
1.0 0.03 0.040 20.5
23.5
CG 8 M J 93 00 0.08 1.50 1.50 0.040 0.040 18.0
21.0
CF 10 SM nN J 92 972 0.10 7.0
9.0
3.50
4.50
0.03 0.060 16.0
18.0
CT 15 C N 08 151 0.05
0.15
0.15
1.50
0.50
1.50
0.03 0.03 19.0
21.0
CK 3 MC uN J 93 254 0.025 1.20 1.0 0.010 0.045 19.5
20.5
CE 20 N J 92 802 0.20 1.50 1.50 0.040 0.040 23.0
26.0
CG 3 M J 92 999 0.03 1.50 1.50 0.040 0.040 18.0
21.0
Gr. UNS
Des.
C Mn Si S P Cr
Composition. % (max. except whers range is given)
Gr. UNS
Des.
Ni Mo Nb V N Cu
CF 3 CF 3A J 92 70 8.0
11.0
0.50        
CF 8 CF8A J 92 60 8.0
11.0
0.50        
CF 3 M CF3 MA J 92 80 9.0
13.0
2.0
3.0
       
CF 8 M J 92 90 9.0
12.0
2.0
3.0
       
CF 3 MN J 92 804 9.0
13.0
2.0
3.0
    0.10
0.20
 
CF 8 C J 92 710 9.0
12.0
0.50 ( 1 )      
CF 10 J 92 950 8.0
11.0
0.50        
CF 10 M J 92 901 9.0
12.0
2.0
3.0
       
CH 8 J 93 40 12.0
15.0
0.50        
CH 10 J 93 401 12.0
15.0
0.50        
CH 20 J 93 402 12.0
15.0
0.50        
CK 20 J 94 202 19.0
22.0
0.50        
HK 30 J 94 203 19.0
22.0
0.50        
HK 40 J 94 204 19.0
22.0
0.50        
HT 30 N0 80 30 33.0
37.0
0.50        
CF 10 MC   13.0
16.0
1.75
2.25
( 2 )      
CN 7 M N0 807 27.5
30.5
2.0
3.0
      3.0
4.0
CN 3 MN J 94 651 23.5
25.5
6.0
7.0
    0.18
0.26
0.75
max
CE 8 MN   8.0
11.0
3.0
4.5
    0.10
0.30
 
CG 6 MMN J 93 790 11.5
13.5
1.50
3.0
0.10
0.30
0.10
0.30
0.20
0.40
 
CG 8 M J 93 00 9.0
13.0
3.0
4.0
       
CF 10 SM nN J 92 972 8.0
9.0
      0.08
0.18
 
CT 15 C N 08 151 31.0
34.0
  0.50
1.50
     
CK 3 MC uN J 93 254 17.5
19.5
6.0
7.0
    0.18
0.24
0.50
1.0
CE 20 N J 92 802 8.0
11.0
0.50     0.08
0.20
 
CG 3 M J 92 999 9.0
13.0
3.0
4.0
       
Gr. UNS
Des.
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, %
Gr. UNS
Des.
C
(1)
Mn
(1)
P
(1)
S
(1)
Si
(1)
Ni
WP XM 19 S 20 910 0.06 4.0
6.0
0.045 0.03 1.0 11.5
13.5
WP 304 S 304
0
0.08 2.0 0.045 0.03 1.0 8.0
11.0
WP 304 L S 304
03
0.03
(4)
2.0 0.045 0.03 1.0 8.0
12.0
WP 304 H S 304
09
0.04
0.10
2.0 0.045 0.03 1.0 8.0
11.0
WP 304 N S 304
51
0.08 2.0 0.045 0.03 1.0 8.0
11.0
WP 304 LN S 304
53
0.03 2.0 0.045 0.03 1.0 8.0
11.0
WP 309 S 309
0
0.20 2.0 0.045 0.03 1.0 12.0
15.0
WP 310 S S 310
8
0.08 2.0 0.045 0.03 1.0 19.0
22.0
WPS 31 254 S 31 254 0.020 1.0 0.03 0.010 0.80 17.5
18.5
WP 316 S 316
0
0.08 2.0 0.045 0.03 1.0 10.0
14.0
WP 316 L S 316
03
0.03
(4)
2.0 0.045 0.03 1.0 10.0
14.0
(5)
WP 316 H S 316
09
0.04
0.10
2.0 0.045 0.03 1.0 10.0
14.0
WP 316 N S 316
51
0.08 2.0 0.045 0.03 1.0 10.0
13.0
WP 316 LN S 316
53
0.03 2.0 0.045 0.03 1.0 10.0
13.0
WP 317 S 317
0
0.08 2.0 0.045 0.03 1.0 11.0
15.0
WP 317 L S 317
03
0.03 2.0 0.045 0.03 1.0 11.0
15.0
WPS 31 725 S 31 725 0.03 2.0 0.045 0.03 1.0 13.5
17.5
WPS 31 726 S 31 726 0.03 2.0 0.045 0.03 1.0 13.5
17.5
WPS 31 727 S 31 727 0.03 1.0 0.03 0.03 1.0 14.5
16.5
WPS 32 053 S 32 053 0.03 1.0 0.03 0.010 1.0 24.0
26.0
WP 321 S 321
0
0.08 2.0 0.045 0.03 1.0 9.0
12.0
WP 321 H S 321
09
0.04
0.10
2.0 0.045 0.03 1.0 9.0
12.0
WPS 33 228 S 33 228 0.04
0.08
1.0 0.020 0.015 0.30 31.0
33.0
WPS 34 565 S 34 565 0.03 5.0
7.0
0.03 0.010 1.0 16.0
18.0
WP 347 S 347
0
0.08 2.0 0.045 0.03 1.0 9.0
12.0
WP 347 H S 347
09
0.04
0.10
2.0 0.045 0.03 1.0 9.0
12.0
WP 348 S 348
0
0.08 2.0 0.045 0.03 1.0 9.0
12.0
WP 348 H S 348
09
0.04
0.10
2.0 0.045 0.03 1.0 9.0
12.0
WPS 38 815 S 38 815 0.03 2.0 0.040 0.020 5.5
6.5
13.0
17.0
Gr. UNS
Des.
C
(1)
Mn
(1)
P
(1)
S
(1)
Si
(1)
Ni
Composition, %
Gr. UNS
Des.
Cr Mo Ti N
(2)
Others
WP XM 19 S 20 910 20.5
23.5
1.50
3.0
  0.20
0.40
(3)
WP 304 S 304
0
18.0
20.0
       
WP 304 L S 304
03
18.0
20.0
       
WP 304 H S 304
09
18.0
20.0
       
WP 304 N S 304
51
18.0
20.0
    0.10
0.16
 
WP 304 LN S 304
53
18.0
20.0
    0.10
0.16
 
WP 309 S 309
0
22.0
24.0
       
WP 310 S S 310
8
24.0
26.0
       
WPS 31 254 S 31 254 19.5
20.5
6.0
6.5
  0.18
0.22
Cu
0.50
1.0
WP 316 S 316
0
16.0
18.0
2.0
3.0
     
WP 316 L S 316
03
16.0
18.0
2.0
3.0
     
WP 316 H S 316
09
16.0
18.0
2.0
3.0
  0.10
0.16
 
WP 316 N S 316
51
16.0
18.0
2.0
3.0
  0.10
0.16
 
WP 316 LN S 316
53
16.0
18.0
2.0
3.0
  0.10
0.16
 
WP 317 S 317
0
18.0
20.0
3.0
4.0
     
WP 317 L S 317
03
18.0
20.0
3.0
4.0
     
WPS 31 725 S 317 25 18.0
20.0
4.0
5.0
  0.20  
WPS 31 726 S 317 26 17.0
20.0
4.0
5.0
  0.10
0.20
 
WPS 31 727 S 317 27 17.5
19.0
3.8
4.5
  0.15
0.21
Cu
2.8
4.0
WPS 32 053 S 32 053 22.0
24.0
5.0
6.0
  0.17
0.22
 
WP 321 S 321
0
17.0
19.0
  (6)    
WP 321 H S 321
09
17.0
19.0
  (7)    
WPS 33 228 S 33 228 26.0
28.0
      Ce 0.05
0.10
Al 0.025
Nb 0.6
0.10
WPS 34 565 S 34 565 23.0
25.0
4.0
5.0
  0.40
0.60
Nb 0.10
WP 347 S 347
0
17.0
19.0
      (8)
WP 347 H S 347
09
17.0
19.0
      (9)
WP 348 S 348
0
17.0
19.0
      Nb+Ta=
103(C) -1.10
Ta 0.10
Co 0.20
WP 348 H S 348
09
17.0
19.0
      Nb+Ta=
83(C) -1.10
Ta 0.10
Co 0.20
WPS 38 815 S 38 815 13.0
15.0
0.75
1.50
    Cu 0.75
1.50
Al 0.30
Gr. UNS
Des.
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%.
PP
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