ASTM A312 / ASME SA312 / Seamless and Welded Austenitic Stainless Steel Pipe supplier & distributor in India

ASTM A 312-89a / ASME SA 312

SEAMLESS AND WELDED AUSTENITIC STAINLESS STEEL PIPE

This standard is issued under the fixed designation A 271; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon ( ε) indicates an editorial change since the last revision or reapproval.

1.Scope

1.1 This specification covers grades of minimum-wall-thickness, seamless, hot-finished and cold-finished, austenitic chromium-nickel steel sill tubes as designated in Table 1 for use in carrying fluids at elevated temperatures and pressures in various types of heaters, in which the tubes may be subjected to a furnace temperature higher than that of the contained fluids.

1.2 The specification covers tubes 2 to 9 in., (50.8 to 228.6 mm) inclusive, in outside diameter and over 0.220 in. (5.59 mm) in minimum wall thickness.

1.3 Grades TP304H, TP321H, TP347H, and TP316H are modifications of Grades TP304, TP321, TP347 and TP316, and are intended for high-temperature service.

1.4 Where butt welding is used to obtain lengths longer than single lengths normally produced on the mill, Specification A 422, shall cover the requirements for butt welds.

1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

1.6 Optional supplementary requirements are provided, and when desired, shall be o stated in the order.

Grade	Remarks (Similar to JIS)	possibility temperature
TP304	(SUS304TP)
TP304H	(SUS304HTP)
TP304L	(SUS304LTP)
TP304N	-
TP304LN	-
TP309Cb	-
TP309H	-
TP309CHb	-
TP309S	(SUS309STP)
TP310Cb	-
TP310H	-
TP310HCb	-
TP310S	(SUS310STP)
TP316	(SUS316TP)
TP316H	(SUS316HTP)
TP316L	(SUS316LTP)
TP316N	-
TP316LN	-
TP317	(SUS317TP)
TP317L	(SUS317LTP)
TP321	(SUS321TP)
TP321H	(SUS321HTP)
TP347	(SUS347TP)
TP347H	(SUS347HTP)
TP348	-
TP348H	-
TPXM-10	-
TPXM-11	-
TPXM-15	-
TPXM-19	-
TPXM-29	-
S31254	-
S30815	-
S31050	-
S30600	-
S34725	-
S31726	-

Chemical Requirements

Grade	UNS Desi- gna- tionA	Composition,%
Grade	UNS Desi- gna- tionA	Carbon, maxB	Mang- anese, maxB	Phos- phorus, max	Sulfur, max	Silicon	Nickel	Chrom	Molyb- denum	Tita- nium	Colum- bium plus Tant- alum	Tant- alum, max	Nitro- genV	Vana- dium	Cop- per	Cer- ium	Boron
TP304	S30400	0.08	2.00	0.040	0.030	0.75 max	8.00-11.0	18.0- 22.0	...	...	...	...	...	...	...	...
TP304H	S30409	0.04-0.10	2.00	0.040	0.030	0.75 max	8.00-11.0	18.0- 22.0	...	...	...	...	...	...	...	...
TP304L	S30403	0.035E	2.00	0.040	0.030	0.75 max	8.00-11.0	18.0- 22.0	...	...	...	...	...	...	...	...
TP304N	S30451	0.08	2.00	0.040	0.030	0.75 max	8.00-11.0	18.0- 22.0	...	...	...	...	0.10-0.16s	...	...	...
TP304LN	S30453	0.035	2.00	0.040	0.030	0.75 max	8.00-11.0	18.0- 22.0	...	...	...	...	0.10-0.16	...	...	...
TP309HCb	S30940	0.08	2.00	0.045	0.030	0.75 max	12.0-16.0	22.0- 24.0	0.75max	...	10xC min, 1.10 max	...	...	...	...	...
TP309H	S30909	0.04-0.10	2.00	0.040	0.030	0.75 max	12.0-15.0	22.0- 24.0	...	...	...	...	...	...	...	...
TP309HCb	S30941	0.04-0.10	2.00	0.045	0.030	0.75 max	12.0-16.0	22.0- 24.0	0.75max	...	10xC min, 1.10 max	...	...	...	...	...
TP309S	S30908	0.08	2.00	0.045	0.030	0.75 max	12.0-15.0	22.0- 24.0	0.75max	...	...	...	...	...	...	...
TP310Cb	S31040	0.08	2.00	0.045	0.030	0.75 max	19.0-22.0	24.0- 26.0	0.75max	...	10xC min, 1.10 max	...	...	...	...	...
TP310H	S31009	0.04-0.10	2.00	0.040	0.030	0.75 max	19.0-22.0	24.0- 26.0	...	...	...	...	...	...	...	...
TP310HCb	S31041	0.04-0.10	2.00	0.045	0.030	0.75 max	19.0-22.0	24.0- 26.0	0.75max	...	10xC min, 1.10 max	...	...	...	...	...
TP310S	S31008	0.08	2.00	0.045	0.030	0.75 max	19.0-22.0	24.0- 26.0	0.75max	...	...	...	...	...	...	...
	S31272	0.08-0.12	1.5-2.00	0.030	0.015	0.3 -0.7	14.0-16.0	14.0- 16.0	1.0-1.4	0.3-0.6	...	...	...	...	...	...	0.004-0.008
TP316	S31600	0.08	2.00	0.040	0.030	0.75 max	11.0-14.0D	16.0- 18.0	2.00-3.00	...	...	...	...	...	...	...
TP316H	S31609	0.04-0.10	2.00	0.040	0.030	0.75 max	11.0-14.0D	16.0- 18.0	2.00-3.00	...	...	...	...	...	...	...
TP316L	S31603	0.035	2.00	0.040	0.030	0.75 max	10.0-15.0	16.0- 18.0	2.00-3.00	...	...	...	...	...	...	...
TP316N	S31651	0.08	2.00	0.040	0.030	0.75 max	11.0-14.0D	16.0- 18.0	2.00-3.00	...	...	...	...	...	...	...
TP316LN	S31653	0.035	2.00	0.040	0.030	0.75 max	11.0-14.0D	16.0- 18.0	2.00-3.00s	...	...	...	...	...	...	...
TP317	S31700	0.08	2.00	0.040	0.030	0.75 max	11.0-14.0	18.0- 20.0	3.00-4.00	...	...	...	...	...	...	...
TP317L	S31703	0.035E	2.00	0.040	0.030	0.75 max	11.0-15.0	18.0- 20.0	3.00-4.00	...	...	...	...	...	...	...
TP321	S32100	0.08	2.00	0.040	0.030	0.75 max	9.00-13.0	17.0- 20.0	...	F	...	...	...	...	...	...
TP321H	S32109	0.04-0.10	2.00	0.040	0.030	0.75 max	9.00-13.0	17.0- 20.0	...	G	...	...	...	...	...	...
TP347	S34700	0.08	2.00	0.040	0.030	0.75 max	9.00-13.0	17.0- 20.0	...	...	H	...	...	...	...	...
TP347H	S34709	0.04-0.10	2.00	0.040	0.030	0.75 max	9.00-13.0	17.0- 20.0	...	...	I	...	...	...	...	...
TP348	S34800	0.08	2.00	0.040	0.030	0.75 max	9.00-13.0	17.0- 20.0	...	...	H	0.10	...	...	...	...
TP348H	S34809	0.04-0.10	2.00	0.040	0.030	0.75 max	9.00-13.0	17.0- 20.0	...	...	I	0.10	...	...	...	...
TPXM-10	S21900	0.08	8.00-10.00	0.040	0.030	1.00 max	5.50-7.50	19.0- 21.5	...	...	...	...	0.15-0.40	...	...	...
TPXM-11	S21904	0.04	8.00-10.00	0.040	0.030	1.00	5.50-7.50	19.0- 21.5	...	...	...	...	0.15-0.40	...	...	...
TPXM-15	S38100	0.08	2.00	0.030	0.030	1.50- 2.50	17.5-18.5	17.0- 19.0	...	...	...	...	...	...	...	...
TPXM-19	S20910	0.060	4.00-6.00	0.040	0.030	1.00 max	11.5-13.5	20.5- 23.5	1.50-3.00	...	...	...	0.20-0.40	...	...	...
TPXM-29	S24000	0.080	11.5-14.5	0.060	0.030	1.00 max	2.25-3.75	17.0- 19.0	...	...	...	...	0.20-0.40	...	...	...
...	S31254	0.020	1.00	0.030	0.010	0.80 max	17.5-18.5	19.5- 20.5	6.00-6.50	...	...	...	0.18-0.22	...	0.50-1.00	...
...	S30815	0.05-0.10	0.80	0.040	0.030	1.40- 2.00	10.0-12.0	20.0- 22.0	...	...	...	...	0.14-0.20	...	...	0.03-0.08
...	S31050	0.25	2.00	0.020	0.015	0.4	20.5-23.5	24.0- 26.0	1.6-2.6	...	...		0.09-0.15	...	...	...
...	S30600	0.018	2.00	0.02	0.02	3.7 -4.3	14.0-15.5	17.0- 18.5	0.20max	...	...	...	...	...	0.50max	...
...	S31725	0.03	2.00	0.040J	0.030	0.75	13.5-17.5	18.0- 20.0	4.0-5.0	...	...	...	0.10max	...	0.75max	...
...	S31726	0.03	2.00	0.040J	0.030	0.75	13.5-17.5	17.0- 20.0	4.0-5.0	...	...	...	0.10-0.20	...	0.75max	...
...	S32615	0.07	2.00	0.045	0.030	4.8 -6.0	19.0-22.0	16.5- 19.5	0.3-1.5	...	...	...	...	...	1.5-2.5	...
...	S24565	0.03	5.0-7.0	0.030	0.010	1.00 max	16.0-18.0	23.0- 25.0	4.0-5.0	...	...	...	0.1-0.6	...	...	...

Tensile Requirements

Grade	UNS Designation	Tensile Strength, min ksi[MPa]	Yield Strength, min ksi[MPa]
TP304L	S30403	70[480]	25[170]
TP316L	S31603	70[480]	25[170]
TP304	S30400	75[515]	30[205]
TP304H	S30409	75[515]	30[205]
TP309Cb	S30940	75[515]	30[205]
TP309H	S30909	75[515]	30[205]
TP309HCb	S30941	75[515]	30[205]
TP309S	S30908	75[515]	30[205]
TP310Cb	S31040	75[515]	30[205]
TP310H	S31009	75[515]	30[205]
TP310HCb	S31041	75[515]	30[205]
TP310S	S31008	75[515]	30[205]
	S31272	65[450]	29[200]
TP316	S31600	75[515]	30[205]
TP316H	S31609	75[515]	30[205]
TP317	S31700	75[515]	30[205]
TP317L	S31703	75[515]	30[205]
TP321	S32100	70[485]	25[170]
Welded Seamless :		75[515]	30[205]
< 3/8 in.		75[515]	30[205]
> 3/8 in.		70[485]	25[170]
TP347	S34700	75[515]	30[205]
TP347H	S34709	75[515]	30[205]
TP348	S34800	75[515]	30[205]
TP348H	S34809	75[515]	30[205]
TPXM-10	S21900	90[620]	50[345]
TPXM-11	S21904	90[620]	50[345]
TPXM-15	S38100	75[515]	30[205]
TPXM-19	S24000	100[690]	55[380]
TPXM-29	S30910	100[690]	55[380]
TP304N	S30451	80[550]	35[240]
TP306N.	S31651	50[550]	35[240]
TP 304LN	S30453	75[515]	30[205]
TP 306LN.	S31653	75[515]	30[205
...	S31254	94[650]	44[300]
...	S30815	87[600]	45[310]
...	S30600	78[540]	35[240]
...	S31725	75[515]	30[205]
...	S31726	80[550]	35[240]
...	S31050
t ≤ 0.25 in.		84[580]	39[270]
t > 0.25 in.A		78[540]	37[25]
...	S32615	80[550]	32[220]
...	S24565	115[795	60[415]
Elongation in 2 in. or 50mm(or 4D), min, %;		35	25
All Grades except S31050		25	...

TABLE 3 Pipe and Filler Metal Specificaton

Pipe		Filler Metal
Grade	UNS Designation	AWS A5.9 Class	UNS Designation
TP304	S30400	ER308	S30800, W30840
TP304L	S30403	ER308L	S30883, W30843
TP304N	S30451	ER308	S30880, W30840
TP304LN	S30453	ER308L	S30883, W30843
TP304H	S30409	ER308	S30880, W30840
TP309Cb	S30940	...	...
TP309S	S30908	...	...
TP310Cb	S31040	...	...
TP310S	S31008	...	...
	S31272	...	...
TP316	S31600	ER316	S31680, W31640
TP316L	S31603	ER316L	S31683, W31643
TP316N	S31651	ER316	S31680, W31640
TP316LN	S31653	ER316L	S31683, W31643
TP316H	S31609	ER316H	S31680, W31640
		ER321	S32180, W32140
TP321	S32100	ER347	S34780, W34740
TP347	S24700	ER347	S34780, W34740
TP348	S34800	ER347	S34780, W34740
TPXM-19	S22100	ER209	S20980, W32240
TPXM-29	S28300	ER240	S23980, W32440

Grade	UNS Designation
TP304	S30400
TP304L	S30403
TP304N	S30451
TP316	S31600
TP316L	S31603
TP316N	S31651
TP317	S31700
TP317L	S31703
TP321	S32100
TP347	S24700

14.1.4 Part Number : Example : ASTM A 312 Pipe 304 NPS 12 SCH 40S SMLS Specificatioin

Number............................................................................................ASTM A 312
Pipe................................................................................................P
Grade..............................................................................................304
NPS................................................................................................12
Wall................................................................................................0.375
SMLS OR WELDED...........................................................................SML 14.1.4.2 Specification Number............................................................................................ASTM A 312
Tube................................................................................................T
Grade...............................................................................................304
Outside Diameter...............................................................................0.250
Wall.................................................................................................0.035
SMLS OR WELDED............................................................................WLD

APPENDIX (Nonmandatory Information) X1.

TABLE X1.1 IS BASED ON TABLE 1 OF THE AMERICAN NATIONAL STANDARD FOR STAINLESS
STEEL PIPE (ANSI B36.19-1965)

TABLE X1.1 Dimensions of Welded and Seamless Stainless Steel Pipe

NOTE - The decimal thickness listed for the respective pipe sizes represents their nominal or average walll dimensions.

NPS Designator	Outside Diameter		Nominal Wall Thickness
	in.	mm	Schedule 5SA		Schedule 10SA		Schedule 40SA		Schedule 80SA
	in.	mm	in.	mm	in.	mm	in.	mm	in.	mm
1/8	0.405	10.29	...	...	0.049	1.24	0.068	1.73	0.095	2.41
1/4	0.540	13.72	...	...	0.065	1.65	0.088	2.24	0.119	3.02
3/8	0.675	17.15	...	...	0.065	1.65	0.091	2.31	0.126	3.20
1/2	0.840	21.34	0.065	1.65	0.083	2.11	0.109	2.77	0.147	3.73
3/4	4.050	26.67	0.065	1.65	0.083	2.11	0.113	2.87	0.154	3.91
1.0	1.315	33.40	0.065	1.65	0.109	2.77	0.133	3.38	0.179	4.55
1 1/4	1.660	42.16	0.065	1.65	0.109	2.77	0.140	3.56	0.191	4.85
1 1/2	1.900	48.26	0.065	1.65	0.109	2.77	0.145	3.68	0.200	5.08
2	2.375	60.33	0.065	1.65	0.109	2.77	0.154	3.91	0.218	5.54
2 1/2	2.875	73.03	0.083	2.11	0.120	3.05	0.203	5.16	0.276	7.01
3	3.500	88.90	0.083	2.11	0.120	3.05	0.1216	5.49	0.300	7.62
3 1/2	4.000	101.60	0.083	2.11	0.120	3.05	0.226	5.74	0.318	8.08
4	4.500	114.30	0.083	2.11	0.120	3.05	0.237	6.02	0.337	8.56
5	5.563	141.30	0.10*9	2.77	0.134	3.40	0.258	6.55	0.375	9.52
6	6.625	168.28	0.10*9	2.77	0.134	3.40	0.280	7.11	0.432	10.97
8	8.625	219.08	0.109	2.77	0.148	3.76	0.322	8.18	0.500	12.70
10	10.750	273.05	0.134	3.40	0.165	4.19	0.365	9.27	0.500B	12.70B
12	12.750	323.85	0.156	3.96	0.180	4.57	0.375B	9.52B	0.500B	12.70B
14	14.000	355.60	0.156	3.96	0.188B	4.78B	...	...	...	...
16	16.000	406.40	0.165	4.19	0.188B	4.78B	...	...	...	...
18	18.000	457.20	0.165	4.19	0.188B	4.78B	...	...	...	...
20	20.000	508.00	0.188	4.78	0.188B	4.78B	...	...	...	...
22	22.000	558.80	0.188	4.78	0.218B	5.54B	...	...	...	...
24	24.000	609.60	0.218	5.54	0.250	6.35	...	...	...	...
30	30.000	762.00	0.250	6.35	0.312	7.92	...	...	...	...

Material Comparison Tables (ASTM →KS, JIS, DIN, BS, NBN, NF, UNI)

ASTM
STANDARD

UNS NO.

KOREA/JAPANES

GERMAN

BRITISH

FRENCH

ITALIAN

KS/JIS Symbol

KS/JIS Numbe

Remarks

DIN Type

DIN Number

Materiral Number

Remarks

B.S Number

B.S Grade

Remarks

AFNOR Type

NF Number

Ramarks

UNI Type

UNI Number

Ramarks

A 312 Seamless and Welded Austenitic Stainless Steel Pipe

TP 304

S30400

STS 304TP / SUS 304 TP

D3576 / G3459

(16)

X5CrNi 18 9

17440

1.4301

(3b)

3605

304S18

TU Z6 CN19-10

A 49-230

X5 CrNi 18 10

6904

(3b)

TP 304H

S30409

STS 304HTP / SUS 304HTP

D3576 / G3459

(16)

(3)

3605

304S59

TU Z6 CN19-10

A 49-214

X8 CrNi 19 10

6904

(3b)

TP 304L

S30403

STS 304LTP/SU

D3576 / G3459

(16)

X2 CrNi 19 9

17440

1.4306

(3b)

3605

304S14

TU Z2 CN19-11

A 49-230

X2 CrNi 18 11

6904

(3b)

TP 310

S31000

304LTP

D3576 / G3459

(16)

(3)

X22 Cr Ni 25 20

6904

(3b)(11)

TP 316

S31600

STS 310STP/SU

D3576 / G3459

(16)

X5 CrNiMo 18 10

17440

1.4401

(3b)

3605

316S18

Z 6 CND 17.11

A 35-573

(3b)

X5 CrNiMo 17 12

6904

(3b)

TP 316H

S34609

310STP

D3576 / G3459

(16)

(3)

3605

316S59

TUZ6CND17-12

A 49-230

X8 CrNiNb 17 12

6904

(3b)

TP 316L

S31603

STS 316TP / SUS 316TP

D3576 / G3459

(16)

X2 CrNiMo 18 10

17440

1.4404

(3b)

3605

316S14

TUNZ2CND17-12

A 49-230

X2 CrNiMo 17 12

6904

Dalmine 941(3b)

TP 321

S32100

STS 316HTP /SU

D3576 / G3459

(16)

x10 CrNiTi 18 9

17440

1.4541

(3b)

3605

321S18

Z6 CNT 18.11

A 49-230

X6 CrNiTi 18 11

6904

(3b)

TP 347

S34700

316HTP

D3576 / G3459

(16)

X5 CrNiNb 18 9

1.4543

(3b)

3605

347S18

Z6 CNNb 18.11

A 35-573

(3b)

X6 CrNiNb 18 11

6904

(3b)

TP 347H

S34709

STS 316LTP /SU

D3576 / G3459

(16)

(3)

X6 CrNiNb 18 11

6904

(3b)

321LTP

STS 321TP / SUS 321TP

STS 347TP / SUS 347TP

STS 347HTP / SUS 347HTP

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