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SS 347H Tubes Suppliers. Top Quality UNS S34709/1.4961 Seamless & Welded Tubes

347H Stainless Steel Tubes


SS 347H Seamless & Welded Tubes Manufacturers & Suppliers, UNS S34709/1.4961 Tubes

  • Equivalents: WRN. 1.4961, UNS S34709 , AISI 347H
  • Specification: ASTM A312, ASTM A213, ASTM A268, ASTM A269
  • Size: 6mm to 101.4 mm, Thickness: 0.5mm to 10mm
  • Products: Seamless Tubes, Welded Tubes, ERW Tubes, Electropolished Tubes, Square Tubes, Rectangular Tubes, Thick Wall Tubes, Thin Wall Tubes, Decorative Tubes, Polished Tubes, Round Tubes
  • Stainless Steel 347H Tubes are available in sizes ranging from 1/4 in. OD to 5″ OD in. & lengths of 20 ft.

Metline is a professional stainless steel 347H tube supplier and manufacturer with more than 30 years experience. Our stainless steel 347H tubes are produced in compliance with ASTM A213/A269/A268 standards. SS 347H tubes supplied by Metline have excellent OD tolerance and mechanical properties enabling us to full fill the most demanding requirements from our customers. The quality of our tubes is ensured by our strict manufacturing process and testings at various stages of production.


  • ASTM A 269 Standard for Seamless Welded Stainless Steel Tube – Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
  • ASTM A312 – Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
  • ASTM A268 – Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
  • ASTM A213 – Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes

SS 347H Seamless Tubes, SS 347H Welded Tubes, SS 347H Tubes Manufacturers, SS 347H Welded Tubes Wholesalers, SS 347H Seamless Tubes Suppliers in Mumbai, SS 347H Seamless Tubes Importers


Manufacturers & Suppliers of Stainless Steel 347H Tubes, UNS S34709/1.4961 Seamless & Welded Tubes

Metline is a specialist manufacturer and supplier of 347H stainless steel tubes with Bright Annealing (BA Tube) or Polishing (Surface Roughness Ra 0.18). We produce 347H stainless steel tubes outside diameter 6mm upto 5″, in wall thickness upto 10mm. Metline is a professional producer of both thin wall and thick wall stainless steel tubes, with exports to over 70 countries across the globe. In addition to 347H stainless steel tubes, we can also produce and supply related tube fittings such as ferrule fittings, compression fittings, and couplings and valves.

Pipes are used to transport something, and tubes to construct something; hence, tubes are defined by the outside diameter and wall thickness (for construction stability), and pipes are measured by inside diameter to allow a calculation for transportation viz., speed, volumes, etc.

Stainless Steel 347H Tubes Size and Weight Chart

Stainless Steel Tube Size and Weight
Wall Thickness in mm 0.5 0.6 0.7 0.8 1 1.2 1.6 2 2.6 3 3.2 3.6
O. D. in mm Weight in kg/m
6 0.069 0.081 0.093 0.104 0.125 0.144 0.176
10 0.119 0.141 0.163 0.184 0.225 0.264 0.336
12.7 0.153 0.182 0.21 0.238 0.293 0.345 0.444
14 0.169 0.201 0.233 0.264 0.325 0.384 0.496
15.87 0.192 0.229 0.266 0.301 0.372 0.44 0.571 0.694
19 0.231 0.276 0.32 0.364 0.45 0.534 0.696 0.85 1.066 1.2 1.264
25 0.306 0.366 0.425 0.484 0.6 0.714 0.936 1.15 1.456 1.65 1.744 1.926
25.4 0.311 0.372 0.432 0.492 0.61 0.726 0.952 1.17 1.482 1.68 1.776 1.962
31.8 0.918 1.208 1.49 1.898 2.16 2.288 2.538
38 1.104 1.456 1.8 2.301 2.625 2.784 3.096
44.5 1.299 1.716 2.125 2.724 3.113 3.304 3.681
50.8 1.968 2.44 3.133 3.585 3.808 4.248
63.5 2.476 3.075 3.959 4.538 4.824 5.391
76.1 2.98 3.705 4.778 5.483 5.832 6.525
101.6 4 4.98 6.435 7.395 7.872 8.82
114.3 4.453 5.547 7.173 8.247 8.78 9.84
127 4.955 6.175 7.989 9.188 9.785 10.98
152.4 5.96 7.429 9.62 11.07 11.792 13.231

Production & Stock Range for 347H UNS S34709/1.4961 Seamless & Welded Tubes

Product Stainless Steel 347H Tube
Origin India, Japan, Europe, US
Form Welded and Seamless
Specification ASTM A213, ASTM A268, ASTM A269, ASTM A789, ASTM A790
Type Fluid, Food, Decorative, Structural, Instrumentation
Round Tube (mm) 4.76 OD to 203.2 OD
Square (mm) 12.7 to 152.6
Rectangular (mm) 25.4 x 12.7 to 203.2 x 101.6
  • Austenitic Stainless Steel: 304/304L/304H(1.4301/1.4306/1.4948); 316/316L(1.4401/1.4404); 316Ti(1.4571); 321(1.4541); 309S (1.4833); 310S(1.4845); 317L(1.4438)321H(1.4878); 347H (1.4550);
  • Duplex Stainless Steel: S32001, S32003, S31500, 2205(1.4462); S32304,(1.4362);S31803,2507 (S32750), S32760(1.4501);S32101(1.4162);
  • Super Austenitic Stainless Steel: 904L, S30432, S31042, 6Mo (S31254, N08367)
  • Nickel Base Alloys: Alloy 20 (UNS N08020), Monel 200 (UNS 02200), Monel 400 (UNS N04400), Incoloy 800 (UNS N08800), Incoloy 800H (UNS N08810), Incoloy 800HT (UNS N08811), Incoloy 825 (UNS N08825), Inconel 600 (UNS N06600), 4J29, 4J36, GH3030, GH3039, C276 (UNS N10276)
  • Martensitic Stainless Steel: 410(1.4006), 410S(1.4000), 420(1.4021)
  • Ferritic Stainless Steel: 405(1.4002), 430(1.4016)
Wall Thickness 0.33 to 10.0mm
Fittings Ttri-clamp, Butt Welding, Flanges, Compression Fittings, Double Compression, Ferrule Fittings
Processing Cut-to-length, Polishing, Bright Annealed, 180 Grit, 240 Grit, 400 Grit
Test Certificates As per EN 10204 3.1
Other Tests As per Customer QAP, Hydro Test, Destructive & Non Destructive Tests
Packing Bundled Packing, or Wooden Box Packing

About 347H Stainless Steel Tube

347H is another stainless steel in a class of metals labeled of precipitation-hardened steels. It possesses many of the same properties and characteristics of stainless steel 347. In addition to its higher carbon content, the alloy is stabilized with an addition of columbium, or sometimes tantalum. Both these properties allow 347H to be exposed to higher temperatures than both 347 and the 304 stainless steel grades can withstand. Because of its elevated resistance to corrosion, 347H is often applied in high stress, high corrosion environments where exposure tends to be severe. High temperature manufacturing, steam pipes, boiler tubes, chemical processes and steam servicing all benefit from 347H’s resilience. This resilience in turn is due to the potentially elevated levels of chromium in 347H’s composition. The metal can contain anywhere from 4-30%.
The metal displays high workability under most common welding techniques. It can be treated with heat, however, it will not respond. Only cold working is sufficient to increase 347H’s toughness and strength.

Types of 347H, UNS S34709, 1.4961 Stainless Steel Seamless & Welded Tubes

SS 347H Seamless Tubes UNS S34709 Seamless Tubes WNR. 1.4961 Seamless Tubes
SS 347H Welded Tubes Stainless Steel 347H Round Tubes Stainless Steel 347H Square Tubes
Stainless Steel 347H Rectangular Tubes Fabricated 347H Stainless Steel Tubes 347H Electropolished Tubes

Equivalents of 347H, S34709/1.4961 Stainless Steel Seamless & Welded Tubes Grade

SS 347H 1.4961 S34709 SUS 347H _ X6CrNiNb18-12

Chemical Composition of 347H, S34709/1.4961 Stainless Steel Seamless & Welded Tubes

Ni 9 – 13
Cr 17 – 19
C 0.04 – 0.10
Mo 3 – 4
Fe Balance
Mn 2 max
Si 0.75 max
S 0.03 max
P 0.045 max
Co + Ta 8xC min
1.00 max

Mechanical Properties of 347H, S34709/1.4961 Stainless Steel Seamless & Welded Tubes

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
347H 515 205 35 92 201

Physical Properties of 347H, S34709/ 1.4961 Stainless Steel Seamless & Welded Tubes

Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
347H 8000 193 15.9 16.2 17.0 14.2 18.7 500 740

Applications of UNS S34709/1.4961 & 347H Stainless Steel Seamless & Welded Tubes

  • Off-Shore Oil Drilling Companies
  • Power Generation
  • Petrochemicals
  • Gas Processing
  • Specialty Chemicals
  • Pharmaceuticals
  • Pharmaceutical Equipment
  • Chemical Equipment
  • Sea Water Equipment
  • Heat Exchangers
  • Condensers
  • Pulp and Paper Industry

Additional information


Stainless Steel 347H Tubes, UNS S34709/1.4961 Stainless Steel Seamless & Welded Tubes

Product Size

OD (NB Sizes) 1/2" to 72"
Wall Thickness: SCH 5 to SCH XXS, Custom Thickness


Seamless, Welded, Coiled, Straight Lengths

Material Grades

304, 304L, 316, 316L, 317/L, 321/321H, 310/310S, 347/347H, 904L, 254 SMO, Alloy 20, Duplex & Super Duplex

Quality Assurance

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report


As per Manufacturing Specification, Heat Number Traceability

Export to Africa

Burundi, Comoros, Djibouti, Eritrea, Ethiopia, Kenya, Madagascar, Malawi, Mauritius, Mayotte, Mozambique, Reunion, Rwanda, Seychelles, Somalia, Tanzania, United Republic of Uganda, Zambia, Zimbabwe, Angola, Cameroon, Central African Republic, Chad, Congo (Brazzaville), Congo, Democratic Republic of the Equatorial Guinea, Gabon, Sao Tome and Principe, Algeria, Egypt, Libyan Arab Jamahiriya, Morroco, South Sudan, Sudan, Tunisia, Western Sahara, Botswana, Lesotho, Namibia, South Africa, Swaziland, Benin, Burkina Faso, Cape Verde, Cote d\\'Ivoire (Ivory Coast), Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mali, Mauritania, Niger, Nigeria, Saint Helena, Senegal, Sierra Leone, Togo

Export to America

Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Bonaire, Saint Eustatius and Saba, British Virgin Islands, Cayman Islands, Cuba, Curaçao, Dominica, Dominican Republic, Grenada, Guadeloupe, Haiti, Jamaica, Martinique, Monserrat, Puerto Rico, Saint-Barthélemy, St. Kitts and Nevis, Saint Lucia, Saint Martin, Saint Vincent and the Grenadines, Sint Maarten, Trinidad and Tobago, Turks and Caicos Islands, Virgin Islands (US), Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands (Malvinas), French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela, Bermuda, Canada, Greenland, Saint Pierre and Miquelon, United States

Export to Asia

Afghanistan, Armenia, Azerbaijan, Bangladesh, Bhutan, Brunei Darussalam, Cambodia, China, Georgia, Hong Kong, India, Indonesia, Japan, Kazakhstan, South Korea, Kyrgyzstan, Laos, Macao, Malaysia, Maldives, Mongolia, Myanmar (ex-Burma), Nepal, Pakistan, Phillipines, Singapore, Sri Lanka (ex-Ceilan), Taiwan, Tajikistan, Thailand, Timor Leste (West), Turkmenistan, Uzbekistan, Vietnam

Export to Europe

Albania, Andorra, Belarus, Bosnia, Croatia, European Union, Faroe Islands, Gibraltar, Guerney and Alderney, Iceland, Jersey, Kosovo, Liechtenstein, Macedonia, Man, Island of Moldova, Monaco, Montenegro, Norway, Russia, San Marino, Serbia, Svalbard and Jan Mayen Islands, Switzerland, Turkey, Ukraine, Vatican City State (Holy See)

Export to European Union

Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, United Kingdom

Export to Middle East

Bahrain, Iraq, Iran, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Saudi Arabia, Syria, United Arab Emirates, Yemen


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