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
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

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
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

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
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

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
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%.