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All You Need to Know About Stainless Steel 347/347H Pipes & Tubes – Sandvik
At Sandvik, we specialize in delivering high-grade Stainless Steel 347/347H Pipes & Tubes Manufacturers solutions to industries that demand strength, durability, and resistance to extreme conditions. These pipe and tube products are engineered with precision, making them an ideal choice for environments involving high temperatures and corrosive substances. Whether you're in petrochemicals, aerospace, or power generation, 347 and 347H stainless steels are go-to materials for critical systems.
So, what exactly are Stainless Steel 347/347H Pipes & Tubes? SS 347 is a columbium-stabilized austenitic stainless steel, offering exceptional resistance to intergranular corrosion after exposure to high temperatures. 347H is a high carbon version of 347, designed for enhanced creep strength and heat resistance. The added carbon content allows 347H to withstand temperatures above 1000°F, making it perfect for high-stress applications. These variants are particularly valuable in operations involving welding or where post-weld heat treatment is impractical.
One of the main advantages of using Sandvik’s Stainless Steel 347/347H Pipes & Tubes Suppliers products is their ability to perform in extreme conditions without compromising structural integrity. They offer excellent mechanical properties, including high tensile strength, good creep strength, and outstanding oxidation resistance. Their resistance to sensitization makes them ideal for applications involving welding or fluctuating thermal cycles. Moreover, these stainless steels remain stable and reliable under prolonged exposure to high pressure and heat.
Our Stainless Steel 347/347H Pipes & Tubes Stockists inventory supports diverse industries including chemical processing, oil & gas, heat exchangers, food processing, aerospace, power generation, marine engineering, and pharmaceuticals. In these sectors, consistent material performance and long service life are not optional — they’re essential. That’s why engineers across the globe rely on Sandvik’s precision-manufactured 347/347H piping products for safe, long-lasting operations.
When it comes to types, Sandvik offers a full spectrum of SS 347/347H piping products: Seamless Pipes & Tubes: Produced without any welding joints, ideal for high-pressure and high-temperature environments. Welded Pipes & Tubes: Cost-effective and suitable for low-pressure applications; available in custom sizes. ERW (Electric Resistance Welded) Pipes: Known for uniformity and smooth surface finish, suitable for structural and engineering use. EFW (Electric Fusion Welded) Pipes: Designed for heavy-duty applications where high strength is required. Capillary Tubes: Thin-walled tubes used in instrumentation and precision applications. Round, Square, and Rectangular Tubes: Used in structural applications where shape and design matter.
As one of the leading Stainless Steel 347/347H Pipes & Tubes Exporters, Sandvik ensures global delivery with uncompromising quality standards and timely logistics. Our products conform to ASTM A312, A213, and other international standards, guaranteeing compatibility with global infrastructure and industrial protocols.
Specification of Stainless Steel 347/347H Pipes & Tubes
| Stainless Steel Pipe Specification : | ASTM A312, A358 / ASME SA312, SA358 |
|---|---|
| SS Tube Specification : | ASTM A213, A269, A249, A511, A554 / ASME SA213, SA269, SA249, SA511, SA554 |
| Pipe Size : | 1/8” NB to 24” NB, 1/4” OD to 24” OD sizes. |
| Tube Size : | 1/2" OD to 8" OD. |
| Thickness Range : | 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Type : | Seamless / ERW / Welded / Fabricated Pipes |
| Form : | Round, Square, Rectangular, Oval, Hydraulic Etc |
| Length : | Single Random, Double Random & Required Length |
| End : | Plain End, Beveled End, Treaded |
| End Protection : | Plastic Caps |
| Outside Finish : | 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements |
| Delivery Condition : | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Inspection, Test Reports : | Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports |
| Packing : | Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests |
| Specials : | Sizes and Specifications other than above can be manufactured on request |
Equivalent Grades of Stainless Steel 347/347H Pipes & Tubes
| STANDARD | UNS | WNR. | EN | JIS |
|---|---|---|---|---|
| SS 347 | S34700 | 1.4541 | X6CrNiTi18-10 | SUS 347 |
| SS 347H | S34709 | 1.4878 | X12CrNiTi18-9 | SUS 347H |
Chemical Composition of Stainless Steel 347/347H Pipes & Tubes
| % | Cr | Ni | C | Si | Mn | P | S | N | Ti | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 347 | min:17.0 max:19.0 |
min: 9.0 max:12.0 |
max:0.08 | max:0.75 | max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 |
Balance |
| 347H | min:17.0 max:19.0 |
min: 9.0 max:12.0 |
min:0.04 max:0.10 |
min:18.0 max:20.0 |
max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 |
Balance |
Mechanical Properties of Stainless Steel 347/347H 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 |