Stainless Steel 321/321H Pipe & Tube

HOME → Our Products → Pipe & Tube → Stainless Steel Pipes & Tubes → Stainless Steel 321/321H Pipe & Tube

321 Stainless Steel Pipe & Tubing Supplier

Sachin Steel Center is a leading supplier, stockist, and exporter of Stainless Steel 321 and 321H Pipes & Tubes, offering high-quality products that meet international standards. Our SS 321/321H pipes and tubes are manufactured from premium raw materials and undergo strict quality checks to ensure durability, reliability, and superior performance. These titanium-stabilized austenitic stainless steels provide excellent corrosion resistance, high-temperature strength, and exceptional toughness, making them suitable for demanding industrial applications. We offer a wide range of options in sizes, wall thicknesses, lengths, types, and finishes, including seamless, welded, and fabricated forms, with customized solutions available to meet specific requirements.

Our SS 321/321H pipes and tubes are widely used across industries such as petrochemical, chemical processing, oil and gas, fertilizer plants, water treatment, heat exchangers, boilers, aerospace, and automotive applications. At Sachin Steel Center, we prioritize delivering top-quality products on time, backed by competitive pricing and excellent customer service, making us a trusted partner for all your stainless steel needs.

SS ASTM A312 TP321H Seamless Pipes, ASTM A358 Stainless Steel 321H EFW Pipe Supplier, ASTM A213 Stainless Steel 321 Tubes, 321H Stainless Steel Pipes, 321H Stainless Steel High Pressure Tubes, Stainless Steel 321 High Pressure Seamless Tubes

Table Of Content

Overview of Stainless Steel 321/321H Pipes & Tubes
Characteristics of SS 321/321H Pipes & Tubes
321 Stainless Steel Pipe Available Types
Stainless Steel 321 Pipe (ASTM A312 TP321) Specification
Chemical Composition of Stainless Steel 321H Pipes
321/321H Stainless Steel Pipes and Tubes Equivalent Grades
Mechanical Properties of Stainless Steel 321/321H Seamless Pipes & Tubes
Physical Properties of 321/321H Stainless Steel Pipes & Tubes
Stainless Steel 321 Pipe Pressure Rating
SS 321 Pipe Size Chart
Dimensions of Stainless Steel 321 ERW Pipe

Overview of Stainless Steel 321/321H Pipes & Tubes

Stainless Steel 321 and 321H Pipes & Tubes are austenitic stainless steels stabilized with titanium, designed to resist intergranular corrosion and maintain strength at high temperatures. The addition of titanium prevents chromium carbide formation during welding, making these grades ideal for elevated temperature applications. SS 321/321H pipes and tubes offer excellent corrosion resistance, high-temperature strength, creep resistance, and durability, which makes them suitable for demanding industrial environments.

These pipes and tubes are available in seamless and welded forms. Seamless pipes are manufactured from a single-piece steel, ensuring uniform strength, smooth surfaces, and high durability, while welded pipes are joined electrically, providing cost-effective and long-lasting solutions. They are available in various shapes such as round, square, and rectangular, and in multiple finishes including polished, decorative, thick-wall, and electro-polished options. They can withstand temperatures ranging from 800–1500°C. SS 321/321H Pipes & Tubes are produced to meet international standards and are customizable in terms of size, wall thickness, length, schedule, shape, and finish. They are widely used in industries requiring high corrosion resistance and temperature tolerance.

Characteristics of SS 321/321H Pipes & Tubes

Stainless Steel 321H Pipes & Tubes are widely preferred across industries due to their exceptional qualities and performance. Some key characteristics include:

Excellent mechanical strength and durability
High tensile and yield strength
Superior weldability for various fabrication needs
Excellent resistance to corrosion, pitting, and oxidation
Ability to withstand high temperatures and pressures
Long-lasting performance and reliability
Greater hardness and structural stability

About Manufacturing of SS 321/321H Tubes

At Sachin Steel Center, the manufacturing of SS 321/321H Seamless and Welded Pipes is carried out under the supervision of experienced professionals with in-depth knowledge of stainless steel fabrication. Each stage of production is carefully monitored to ensure high-quality output. We use premium-grade alloys, advanced machinery, and refined technology to deliver pipes and tubes with precise dimensions, smooth surfaces, and flawless finishes. Our manufacturing processes adhere to national and international standards, ensuring that every product meets stringent quality and performance requirements.

Whether for industrial, chemical, petrochemical, or high-temperature applications, Sachin Steel Center guarantees durable, reliable, and superior-quality SS 321/321H Pipes & Tubes tailored to your specifications.

321 Stainless Steel Pipe Available Types

ASTM A312 TP 321 Round Pipe supplier in Mumbai, SS 321 Rectangular Pipe, 321 SS Tube, UNS S32100 Hollow Pipe, 321 SS Tube Exporter, 321 Stainless Steel Seamless Manufacturer, Stainless Steel 321H Pipes Exporters, ASTM A312 TP321H ERW Pipe.

Stainless Steel 321 Pipe (ASTM A312 TP321) Specification

ASTM / ASME Specification	ASTM A312 / ASTM SA 312
Dimensional Standards	ANSI/ASME B36.19M, ANSI/ASME B36.10M
Different Types and Shapes	Hydraulic, Square, Hex, Honed, Round, Rectangle
Most Common types	100% X Ray Welded, Seamless, CDW, Fabricated, ERW, Welded
Pipe End Types	Plain One End, Plain Both Ends, Bevel small end, Treaded On End, Beveled end, Bevel one end, Bevel large end, Beveled One End, Treaded Both Ends, Bevel both ends
Technical Conditions of The Pipe	Cold Drawn, Bright Annealed, Annealed and Pickled, Polished
Mechanical Surface Finishing	2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements
Wall Wall Thickness Schedule Chart	SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Chemical Composition of Stainless Steel 321H Pipes

Grade	C	Mn	Si	P	S	Cr	N	Ni	Ti
SS 321	0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	17.00 – 19.00	0.10 max	9.00 – 12.00	5(C+N) – 0.70 max
SS 321H	0.04 – 0.10	2.0 max	1.0 max	0.045 max	0.030 max	17.00 – 19.00	0.10 max	9.00 – 12.00	4(C+N) – 0.70 max

321/321H Stainless Steel Pipes and Tubes Equivalent Grades

STANDARD	UNS	WNR.	EN	JIS
SS 321	S32100	1.4541	X6CrNiTi18-10	SUS 321
SS 321H	S32109	1.4878	X12CrNiTi18-9	SUS 321H

Mechanical Properties of Stainless Steel 321/321H Seamless Pipes & Tubes

Grade	Tensile Strength ksi (min.)	Yield Strength 0.2% Offset ksi (min.)	Elongation – % in 50 mm (min.)	Hardness (Brinell) MAX
321/321H	75	30	40	217

Physical Properties of 321/321H Stainless Steel Pipes & Tubes

Denstiy lb_m/in³	Coefficient of Thermal Expansion (min/in)-°F		Thermal Conductivity BTU/hr-ft-°F	Specific Heat BTU/lb_m -°F	Modules of Elasticity (annealed)²-psi
at 68 °F	at 68 – 212°F	at 68 – 1832°F	at 200°F	at 32 – 212°F	in tension (E)
0.286	9.2	20.5	9.3	0.12	28 x 10⁶

Stainless Steel 321 Pipe Pressure Rating

Pipe Size (inches)	Pipe Schedule	Temperature (°F)
Pipe Size (inches)	Pipe Schedule	100	200	300	400	500	600	650	700	750
1″	40	3048	2629	2362	2171	2019	1924	1867	1824	1810
1″	80	4213	3634	3265	3002	2791	2659	2580	2528	2501
1″	160	6140	5296	4759	4375	4068	3876	3761	3684	3646
1.5″	40	2257	1947	1750	1608	1496	1425	1383	1354	1340
1.5″	80	3182	2744	2466	2267	2108	2009	1949	1909	1889
1.5″	160	4619	3984	3580	3291	3060	2916	2829	2772	2743
2″	40	1902	1640	1474	1355	1260	1201	1165	1141	1129
2″	80	2747	2369	2129	1957	1820	1734	1682	1648	1631
2″	160	4499	3880	3486	3205	2980	2840	2755	2699	2671
3″	40	1806	1558	1400	1287	1196	1140	1106	1084	1072
3″	80	2553	2202	1979	1819	1691	1612	1564	1532	1516
3″	160	3840	3312	2976	2736	2544	2424	2352	2304	2280
4″	40	1531	1321	1187	1091	1014	967	938	919	909
4″	80	2213	1909	1715	1577	1466	1397	1355	1328	1314
4″	160	3601	3106	2791	2566	2386	2273	2206	2161	2138
5″	40	1342	1158	1040	956	889	847	822	805	797
5″	80	1981	1709	1535	1411	1312	1250	1213	1189	1176
5″	160	3414	2945	2646	2433	2262	2155	2091	2049	2027
6″	40	1219	1052	945	869	808	770	747	732	724
6″	80	1913	1650	1483	1363	1267	1208	1172	1148	1136
6″	160	3289	2836	2549	2343	2179	2076	2014	1973	1953
8″	40	1073	926	832	765	711	678	657	644	637
8″	80	1692	1459	1311	1205	1121	1068	1036	1015	1005
8″	160	3175	2738	2460	2262	2103	2004	1944	1905	1885
10″	40	974	840	755	694	945	615	596	584	578
10″	80	1609	1388	1247	1147	1066	1016	986	966	956
10″	160	3147	2714	2439	2242	2085	1986	1927	1880	1868

SS 321 Pipe Size Chart

OD (mm)	WT (mm)	Sch	in.	Kg/m
13.72	1.65	10S	1/4	0.50
17.15	1.65	10S	3/8	0.64
21.34	2.11	10S	1/2	1.02
26.67	2.11	10S	3/4	1.30
33.40	2.77	10S	1	2.13
42.16	2.77	10S	1¼	2.73
48.26	2.77	10S	1½	3.16
60.33	2.77	10S	2	3.99
73.03	3.05	10S	2½	5.35
88.90	3.05	10S	3	6.56
101.60	3.05	10S	3½	7.53
114.30	3.05	10S	4	8.50
141.30	6.55	40S	5	22.10
168.28	3.4	10S	6	14.04
219.08	8.18	40S	8	43.20

Dimensions of Stainless Steel 321 ERW Pipe

Size (in.)	OD (mm)	OD (in.)	WT (in.)	WT (mm)	Weight (kg/m)	Weight (lb/ft)
1/2	21.3	0.840	0.065	1.65	0.80	0.54
8	219.1	8.625	0.109	2.77	14.87	9.99
12	323.9	12.750	0.156	3.96	31.44	21.13
1	33.4	1.315	0.065	1.65	1.30	0.87
18	457.0	18.000	0.165	4.19	47.09	31.64
1 1/4	42.2	1.660	0.065	1.65	1.66	1.12
22	559.0	22.000	0.188	4.78	65.75	44.18
10	273.1	10.750	0.134	3.4	22.76	15.29
2 1/2	73.0	2.875	0.083	2.11	3.71	2.49
6	168.3	6.625	0.109	2.77	11.38	7.65
14	355.6	14.000	0.156	3.96	34.56	23.22
3 1/2	101.6	4.000	0.083	2.11	5.21	3.50
3/4	26.7	1.050	0.065	1.65	1.03	0.69
1 1/2	48.3	1.900	0.065	1.65	1.91	1.28
30	762.0	30.000	0.250	6.35	119.09	80.02
2	60.3	2.375	0.065	1.65	2.40	1.61
3	88.9	3.500	0.083	2.11	4.54	3.05
16	406.4	16.000	0.165	4.19	41.83	28.11
5	141.3	5.563	0.109	2.77	9.52	6.40
4	114.3	4.500	0.083	2.11	5.88	3.95
24	610.0	24.000	0.218	5.54	83.11	55.85
20	508.0	20.000	0.188	4.78	59.70	40.12

Schedule Chart of Stainless Steel 321 Pipe

NPS	OD	DN	SCH-l0s	SCH-5s	SCH-10	SCH-30	SCH-20	SCH40s	SCH-40	SCH-STD	SCH-60	SCH-XS	SCH80s	SCH-80	SCH-120	SCH-100	SCH-140	SCH-XXS	SCH-160
1/4	13.7	8	1.65	–	–	–	–	2.24	2.24	2.24	–	3.02	3.02	3.02	–	–	–	–	–
1/2	21.3	15	2.11	1.65	–	–	–	2.77	2.77	2.77	–	3.73	3.73	3.73	–	–	–	7.47	4.78
3/8	17.1	10	1.65	–	–	–	–	2.31	2.31	2,31	–	3.20	3.20	3.20	–	–	–	–	–
3/4	26.7	20	2.11	1.65	–	–	–	2.87	2.87	2.87	–	3.91	3.91	3.91	–	–	–	7.82	5.56
1 1/4	42.2	32	2.77	1.65	–	–	–	3.56	3,56	3.56	–	4.85	4.85	4.85	–	–	–	9.70	6.35
1	33.4	25	2.77	1.65	–	–	–	3.38	3.38	3.38	–	4.55	4.55	4.55	–	–	–	9.09	6.35
1 1/2	48.3	40	2.77	1.65	–	–	–	3.68	3.68	3.68	–	5.08	5.08	5.08	–	–	–	10.15	7.14
2 1/2	73	65	3.05	2.11	–	–	–	5.16	5.16	5.16	–	7.01	7.01	7.01	–	–	–	14.02	9.53
2	60.3	50	2.77	1.65	–	–	–	3.91	3.91	3.91	–	5.54	5.54	5.54	–	–	–	11.07	8.74
3	88.9	80	3.05	2.11	–	–	–	5.49	5.49	5.49	–	7.62	7.62	7.62	–	–	–	15.24	11.13
4	114.3	100	3.05	2.11	–	–	–	6.02	6.02	6.02	–	8.56	8.56	8.56	11.13	–	–	17.12	13.49
3 1/2	101.6	90	3.05	2.11	–	–	–	5.74	5.74	5.74	–	8.08	8.08	8.08	–	–	–	–	–
5	141.3	125	3.40	2.77	–	–	–	6.55	6.55	6.55	–	9,53	9.53	9.53	12.70	–	–	19.05	15.88
8	219.1	200	3.76	2.77	–	7.04	6.35	8.18	8.18	8.18	10.31	12.70	12.70	12.70	18.26	15.09	20.62	22.23	23.01
1/8	10.3	6	1.24	–	–	–	–	1.73	1.73	1.73	–	2.41	2.41	2.41	–	–	–	–	–
6	168.3	150	3.40	2.77	–	–	–	7.11	7.11	7.11	–	10.97	10.97	10.97	14.27	–	–	21.95	18.26
10	273.1	250	4.19	3.40	–	7.80	6.35	9.27	9.27	9.27	12.70	12.70	12.70	15.09	21.44	18.26	25.40	25.40	28.58
14	355.6	350	4.78	3.96	6.35	9.53	7.92	–	11.13	9.53	15.09	12.70	–	19.05	27.79	23.83	31.75	–	35.71
12	323.9	300	4.57	3.96	–	8.38	6.35	9.53	10.31	9.53	14.27	12.70	12.70	17.48	25.40	21.44	28.58	25.40	33.32
16	406.4	400	4.78	4.19	6.35	9.53	7.92	–	12.70	9.53	i6.66	12.70	–	21.44	30.96	26.19	36.53	–	40.49
20	508	500	5.54	4.78	6.35	12.70	9.53	–	15.09	9.53	20.62	12.70	–	26.19	38.10	32.54	44.45	–	50.01
18	457.2	450	4.78	4.19	6.35	11.13	7.92	–	14.27	9.53	19.05	12.70	–	23.83	34.93	29.36	39,67	–	45.24

321H Stainless Steel Tube Weight Chart

Size (in)	WT (in)	Weight
Size (in)	WT (in)	(lb/ft)	(kg/m)
20	0.59	123	183.05
24	0.69	171	254.48
14	0.44	63	93.75
16	0.50	78	116.08
18	0.56	105	156.26
12	0.41	53.60	79.77
10	0.37	40.48	60.24
8	0.32	28.55	42.49
6	0.28	18.97	28.23
5	0.26	14.61	21.74
4	0.24	10.79	16.06
3 ½	0.23	9.11	13.56
3	0.22	7.58	11.27
2 ½	0.20	5.79	8.62
2	0.15	3.65	5.43
1 ½	0.15	2.72	4.04
1 ¼	0.14	2.27	3.38
1	0.13	1.68	2.50
¾	0.11	1.13	1.68
½	0.11	0.85	1.26
3/8	0.09	0.57	0.84
¼	0.09	0.42	0.63
1/8	0.07	0.24	0.36

Thickness Chart for SS 321/321H Pipe & Tubes

WT (in.)
NB	OD in.	10S	10	40S	40	80S	80	160
1/4	.540	.065	.065	.088	.088	.119	.119	–
1/2	.840	.083	.083	.109	.109	.147	.147	.187
3/8	.675	.065	.065	.091	.091	.126	.126	–
3/4	1.050	.083	.083	.113	.113	.154	.154	.218
1/8	.405	.049	.049	.068	.068	.095	.095	–
1 1/4	1.660	.109	.109	.140	.140	.191	.191	.250
1	1.315			.133	.133	.179	.179	.250
1 1/2	1.900			.145	.145	.200	.200	.281
2	2.375			.154	.154	.218	.218	.343
2 1/2	2.875	.120	.120	.203	.203	.276	.276	.375
3	3.500			.216	.216	.300	.300	.437
4	4.500			.237	.237	.337	.337	.531
3 1/2	4			.226	.226	.318	.318	–
4 1/2	5	–	–	.247	–	.355	–	–
6	6.625	.134	.134	.280	.280	.432	.432	.718
5	5.563	.134	.134	.258	.258	.375	.375	.625
7	7.625	–	–	.301	–	.500	–	–
9	9.625	–	–	.342	–		–	–
8	8.625	.148	.148	.322	.322		.500	.906
10	10.750	.165	.165	.365	.365		.593	1.125
12	12.750	.180	.180	.375	.406		.687	1.312
11	11.750	–	–		–		–	–
14	14	.188	.250		.437		.750	1.406
18	18		.250		.562		.937	1.781
16	16		.250		.500		.843	1.593

Application of Stainless Steel 321H Pipes & Tubes

- Petrochemical Industry
- Chemical Industry
- Oil and Gas Industry
- Pulp & Paper Indusry
- Power Plant Industry
- Food Processing Industry
- Pharmaceuticals Industry
- Energy Industry
- Aerospace Industry

Frequently Asked Questions About SS 321/321H Pipes & Tubes

Which industries use SS 321/321H Pipes & Tubes?

SS 321/321H pipes are widely used in petrochemical, chemical processing, oil & gas, aerospace, fertilizer plants, water treatment, boilers, heat exchangers, and exhaust systems, as they offer excellent corrosion resistance and high-temperature strength.

What is the difference between SS 304 and SS 321?

SS 321 is titanium-stabilized to prevent intergranular corrosion during welding, whereas SS 304 is not stabilized. This makes SS 321 ideal for high-temperature applications, while SS 304 is suitable for general-purpose applications at moderate temperatures.

What are the advantages of SS 321/321H Pipes & Tubes?

High tensile and yield strength
Excellent corrosion and oxidation resistance
Can withstand high temperatures and pressures
Superior weldability and long service life
Creep resistance in elevated temperature conditions

Can SS 321/321H be welded to SS 316?

Yes, SS 321 can be welded to SS 316 using appropriate filler materials and welding techniques. Proper post-weld treatment is recommended to maintain corrosion resistance and mechanical strength.

What forms of SS 321/321H Pipes & Tubes are available?

They are available in seamless, welded, round, square, rectangular, thick wall, polished, and electro-polished forms, with customizable dimensions and finishes as per project requirements.

What standards do SS 321/321H Pipes & Tubes comply with?

They are manufactured as per ASTM, ASME, DIN, and UNS standards, ensuring international quality compliance.

Stainless Steel Pipes & Tubes

Materials

Our Products

Enquire Now

Fill out the form below, and our team will get in touch with you within 24 hours.