Home > Stainless Steel >Stainless Steel 347 and 347H EFW Pipes
Kamron Pipe and Tubes, a well-respected manufacturer and supplier based in Bangkok, Thailand, specializes in high-quality Stainless Steel 347 and 347H EFW (Electric Fusion Welded) Pipes that are designed for exceptional strength and durability. These pipes are crafted using cutting-edge fusion welding techniques and are stabilized with niobium (columbium) to guard against intergranular corrosion, making them a reliable choice for high-temperature applications. The 347H variant, which has a higher carbon content, offers improved creep and stress rupture strength, making it ideal for elevated temperature service. Kamron Pipe and Tubes adheres to global quality standards, ensuring that their welded pipes perform efficiently in critical industrial settings.
The Stainless Steel 347 and 347H EFW Pipes are made from a blend of chromium, nickel, and columbium, with carefully controlled carbon levels to enhance thermal stability. They boast excellent mechanical properties, including impressive tensile and yield strength, toughness, and resistance to oxidation and scaling at high temperatures. Some of the key benefits include outstanding weldability, high creep resistance, protection against intergranular corrosion, and a long service life even in harsh conditions. The 347H grade, with its elevated carbon content, provides enhanced mechanical properties for reliable performance under high stress and temperature.
| Specification | ASTM A358 / ASME SA358 |
| Specification | A / SA358 CLASS 1, A / SA358 CLASS 2, A / SA358 CLASS 3, A / SA358 CLASS 4, A / SA358 CLASS 5 |
| Grades | 304, 304L, 304H, 309S, 310S, 316, 316L, 316H, 317L, 321, 321H, 347, 347H, 904L ETC. |
| Type | EFW, ELECTRIC FUSION WELDED |
| Outer Diameter Size | Electric Fusion Welded / ERW- 8″ NB To 110″ NB (Nominal Bore Size) |
| Wall Thickness | Schedule 10 To Schedule 160 (3 mm to 100 mm Thickness) |
| Length | 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size. |
| Ends | Plain Ends / Beveled Ends |
| Delivery Conditions | As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered |
| Coating | Electropolish, Mechanical Polish, Satin Finish, Passivated |
| Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME |
| Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment |
| Packaging | Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
| Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
| STANDARD | UNS | WERKSTOFF NR. | EN | JIS | GOST |
| SS 347 | S34700 | 1.4550 | X6CrNiNb18-10 | SUS 347 | 08Ch18N12B |
| SS 347H | S34709 | 1.4961 | X6CrNiNb18-12 | SUS 347H | – |
| Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
| SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 8xC – 1.10 | 9.0 -13.0 | 63.72 min |
| Tensile Strength | Yield Strength (0.2%Offset) | Elongation | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | |||
| Psi – 75000, MPa – 515 | Psi – 30000, MPa – 205 | 35 % | 92 | 201 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Stainless Steel 347 and 347H EFW Pipes from Kamron Pipes and Tubes guarantees excellent corrosion resistance, high strength, and durability. Designed for diverse industrial applications, it delivers reliable performance in tough environments while maintaining competitive pricing for cost-effective solutions.
| 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 | |||
| 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 | … | … | … | … |
We offer custom sizes for Stainless Steel 347 and 347H EFW Pipes to meet your specific needs. Our dedicated team at Kamron Pipes and Tubes provides tailored solutions for all your piping and tubing requirements. For more information, contact us at sales@www.kamronpipes.com.
These Stainless Steel 347 and 347H EFW Pipes are commonly utilized in chemical and petrochemical processing, power plants, and refineries where heat and corrosion resistance are essential. They are found in boilers, heat exchangers, superheaters, and exhaust systems that operate at high temperatures. In the marine and aerospace industries, they are used for components that face extreme heat and corrosive environments. Additionally, they are valuable in food processing, pharmaceutical sectors, and structural systems. Their durability, stability, and resistance to heat and corrosion make them a trusted choice for demanding industrial applications.
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