Why is Stainless Steel 347 preferred in high-temperature and welded applications?

This grade handles high heat without losing its strength. It stays stable during welding and does not become brittle.

What benefits does niobium stabilization provide in SS 347 pipes?

Niobium stops carbon from reacting at high heats. This prevents the pipe from rusting or cracking near weld points.

What industries commonly use Stainless Steel 347 pipes?

They are used in jet engines, oil refineries, and chemical processing plants. They also work well in power plants.

How do SS 347 pipes perform in highly corrosive environments?

They resist acids and harsh chemicals very well. The alloy stays clean and strong even in moist or salty air.

What certifications are essential when choosing a SS 347 pipe supplier?

Look for suppliers who meet ASTM A312 and ASME SA 312 standards. Quality test reports should come with every order.

Stainless Steel 347 Pipe Manufacturer & Supplier

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As leading Stainless Steel 347 Pipe Suppliers, Preston Alloys provide high-performance solutions for extreme heat and corrosive settings. These pipes use a blend of nickel, chromium, and columbium to boost strength. We use hot or cold rolling methods to suit your specific project needs. Focusing on quality raw materials and precise manufacturing. Our team maintains a perfect mix of elements to ensure every pipe lasts.

SS 347 Seamless Pipe is known for its incredible strength and long-term durability. It has a high yield strength of 205 and a tensile strength of 515. This makes the pipe both flexible and very tough. It can stretch up to 40% under stress without breaking. These pipes also resist damage from many different chemicals. The added columbium stops carbide buildup to prevent rust at the joints. 347 stainless steel round pipe is often used in aircraft parts and chemical plants. But avoid oxyacetylene welding to keep the metal strong.

We have various kinds of pipe, such as seamless, ERW and welded. These follow the strict ASTM A312 Tp347 and ASME SA 312 Tp347 standards. Choose sizes from ½ inch to 6 inches in NB. We offer a number of finishes, including polished, bright and pickled. We have all kinds of shapes in stock, including round, square and rectangular. For systems that need to be completely reliable, UNS S34709 seamless pipe is the best choice.

Every ASTM A312 tp347 pipe goes through hard testing before it leaves our shop. We check the pressure limits, hardness, and surface quality. Our team packs every order securely so it stays safe during shipping. We take pride in being a reliable stockist with fast delivery times. You can count on us for pipes that meet your exact standards every time.

Stainless Steel 347 Pipe Specification Chart

Standard Specification	ASTM A 312 Tp347 / ASME SA 312 Tp 347
Types	Seamless, ERW, Welded, EFW
Size	½ to 6 Inch NB
Surface Finish	Bright, Cold Finish, Annealing, Polished, Pickling
Manufacturing Technology	Hot / Cold Formed
Wall Thickness	0.1 To 60 mm
Standard	DIN, JIS, AMS, GB, AISI, ASME, ASTM, EN, GOST
Technique	Cold Rolled Hot Rolled
Manufacturing Shapes	Round, Rectangle, Square, Box Section
Schedule Pipe Thickness Range	SCH 80, SCH 40, SCH XXS, SCH 5, SCH 80S, SCH10, SCH XS, SCH 160
Supplier	Mumbai

Stainless Steel 347 Price Per Kg

Stainless Steel 347 Price	Origin	Price in INR (per kg)	Price in USD (per kg)	Price in Euro (per kg)
Stainless Steel 347 Price in India	Indian	Rs 255/-	$3.72	€3.18
Stainless Steel 347 Price in Japan	Japanese	Rs 350/-	$5.11	€4.37
Stainless Steel 347 Price in UK / Europe	European	Rs 400/-	$5.84	€4.99
Stainless Steel 347 Price in USA	USA	Rs 450/-	$6.57	€5.62

AISI 347 Schedule 40 Pipe Pressure ratings

Pipe Schedule	Pipe Size in Inch	Outside Diameter Inch	Wall Thickness Inch	Temperature
Pipe Schedule	Pipe Size in Inch	Outside Diameter Inch	Wall Thickness Inch	100	200	300	400	500	600	650	700	750
40	1 1/2	1.900	0.145	1629	1629	1629	1512	1404	1317	1287	1258	1229
80		1.900	0.200	2303	2303	2303	2138	1986	1862	1821	1779	1738
160		1.900	0.281	3362	3362	3362	3120	2899	2717	2657	2597	2536
40	1	1.315	0.133	2205	2205	2205	2047	1902	1783	1743	1703	1664
80		1.315	0.179	3061	3061	3061	2841	2640	2475	2420	2365	2310
160		1.315	0.250	4493	4493	4493	4170	3874	3632	3552	3471	3390
40	5	5.563	0.258	965	965	965	896	832	780	763	746	728
80		5.563	0.375	1428	1428	1428	1325	1231	1154	1129	1103	1077
160		5.563	0.625	2474	2474	2474	2296	2133	2000	1955	1911	1866
40	2	2.375	0.154	1371	1371	1371	1272	1182	1108	1083	1059	1034
80		2.375	0.218	1985	1985	1985	1843	1712	1605	1569	1534	1498
160		2.375	0.344	3283	3283	3283	3047	2831	2654	2595	2536	2477
40	3	3.500	0.216	1301	1301	1301	1208	1122	1052	1028	1005	982
80		3.500	0.300	1844	1844	1844	1712	1590	1491	1458	1425	1391
160		3.500	0.438	2787	2787	2787	2587	2403	2253	2203	2153	2103
40	4	4.500	0.237	1102	1102	1102	1023	950	891	871	851	831
80		4.500	0.337	1596	1596	1596	1482	1377	1291	1262	1233	1204
160		4.500	0.531	2611	2611	2611	2424	2552	2111	2064	2017	1970
40	8	8.625	0.322	771	771	771	716	665	623	610	596	582
80		8.625	0.500	1218	1218	1218	1131	1050	985	963	941	919
160		8.625	0.906	2298	2298	2298	2133	1982	1858	1817	1775	1734
40	6	6.625	0.280	877	877	877	814	756	709	693	677	661
80		6.625	0.432	1379	1379	1379	1280	1189	1115	1090	1065	1040
160		6.625	0.719	2382	2382	2382	2211	2054	1925	1883	1840	1797
40	10	10.750	0.365	699	699	699	649	603	565	553	540	528
80		10.750	0.594	1159	1159	1159	1075	999	937	916	895	874
160		10.750	1.125	2289	2289	2289	2124	1974	1850	1809	1768	1727

347 SS Seamless Pipe Dimension

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

Types of UNS S34700 Seamless Pipe

Stainless Steel 347 Seamless Pipe

Stainless Steel 347 Welded Pipe

Stainless Steel 347 ERW Pipe

Stainless Steel 347 EFW Pipe

Stainless Steel 347 Round Pipe

Stainless Steel 347 Square Pipe

Stainless Steel 347 Rectangular Pipe

Stainless Steel 347 Polished Pipe

Reach Out to Preston Pipes and Alloys for the Best Stainless Steel 347 Pipe Pricing and Quotations

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SUS 347 Pipe Chemical Compositions

Grade		Phosphorous	Manganese	Carbon	Silicon	Nickel	Molybdenum	Sulphur	Chromium
SS 347 Pipe	Minimum					9.0	2.00		17.0
SS 347 Pipe	Maximum	0.045	2.0	0.08	1.00	13.0	3.00	0.030	20.0

Stainless Steel 1.4550 Pipe Mechanical Properties

Grade	Yield Strength	Elongation	Tensile Strength	Hardness
				Rockwell B (HR B)	Brinell (HB)
SS 347 Pipe	205	40	515	95	201

Stainless Steel 347 Physical Properties

Grade	Density (kg/m³)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion 0–100°C	0–315°C	0–538°C	Thermal Conductivity at 100°C (W/m·K)	at 500°C (W/m·K)	Specific Heat 0–100°C (J/kg·K)	Electrical Resistivity (n·m)
347	8000	193	15.9	16.2	17.0	14.2	18.7	500	740

ASTM A312 TP 347 Pipe Equivalent

GRADE	WERKSTOFF NR.	UNS	EN
SS 347 Pipe	1.4550	S34700	X6CrNiNb18-10

View the dimensions and weight chart of UNS S34700 Grade 347 pipes, including Austenitic Stainless Steel 347 seamless pipes, from your trusted SS 347 stockist

Industrial Application of 347 Stainless Steel Pipe

Frequently Asked Questions

Stainless Steel 347 handles high temperatures without losing mechanical strength. It remains stable during welding and resists brittleness, making it reliable for continuous high-heat and welded service conditions.

Niobium stabilisation prevents carbon from reacting at elevated temperatures. This reduces the risk of intergranular corrosion and cracking, especially near weld zones, improving long-term durability.

Stainless Steel 347 pipes are widely used in jet engines, oil refineries, chemical processing plants, and power generation facilities where high heat and corrosion resistance are critical.

SS 347 pipes offer strong resistance to acids, harsh chemicals, and corrosive atmospheres. The alloy maintains surface integrity and strength even in humid, salty, or chemically aggressive environments.

SS 347 pipe suppliers should comply with ASTM A312 and ASME SA 312 standards. Each supply should be accompanied by quality documentation such as Mill Test Certificates (MTC) to ensure material traceability and compliance.

347 Stainless Steel Pipe