Mitchell Stainless is a reliable manufacturer and supplier of top-notch Stainless Steel 347H Bars based in Hamilton, New Zealand, serving various demanding industrial sectors. With a strong commitment to quality, precision, and adherence to international standards, the company provides bars that excel in high-temperature strength and corrosion resistance. By sourcing only the finest raw materials and implementing rigorous quality control measures, Mitchell Stainless ensures consistent performance and dependability. Catering to industries like petrochemical, power generation, and process engineering, they are recognized for their prompt delivery, competitive pricing, and tailored solutions that meet both local and global project needs.
Stainless Steel 347H Bars are a type of stabilized austenitic stainless steel, enriched with chromium and nickel, and enhanced with columbium (niobium) to boost resistance against intergranular corrosion. The increased carbon content compared to 347 improves creep strength and tensile properties at higher temperatures. These bars are known for their good ductility, excellent weldability, and robust oxidation resistance. They maintain their structural integrity even under prolonged heat exposure, making them ideal for high-stress and high-temperature applications while ensuring reliable mechanical performance.
| Specifications | ASTM A276 / ASME SA276 |
| Dimensions | ASTM, ASME |
| Range | 3.17 MM TO 350 MM DIA |
| Diameter | 25mm to 152mm |
| Length | 1 to 6 Meters, Custom Cut Length |
| Finish | Bright, Polish & Black |
| Form | Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wiremesh, Billet, Ingot, Forging |
| Condition | Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
| 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 | 40 | 92 | 201 |
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At Mitchell Stainless quality matters. Our Stainless Steel 347H Bars undergo rigorous testing, including tensile strength hardness, corrosion resistance tests so as to be in international standards. We have credible agencies certified thus we furnish material test certificates (MTCs) and third-party inspections. Ensuring reliability and unmatched performance in critical industrial applications.
Stainless Steel 347H Round Bars offer excellent corrosion resistance. Available in sizes ranging from 3mm to 200mm in diameter, these bars are ideal for applications in high-temperature environments due to their stability and durability.
These bars provide outstanding resistance to corrosion and oxidation. Stainless Steel 347H Flat Bars come in thicknesses from 1mm to 50mm and widths from 10mm to 500mm, making them suitable for a variety of industrial uses.
Stainless Steel 347H Square Bars are perfect for high-stress applications. Available in sizes from 5mm to 100mm, they combine excellent mechanical properties with superior resistance to intergranular corrosion.
These bars are highly resistant to corrosion and scaling. Stainless Steel 347H Rectangular Bars are available in thicknesses from 1mm to 50mm and widths from 10mm to 500mm, ideal for structural and mechanical applications.
Stainless Steel 347H Hexagonal Bars offer excellent resistance to high temperatures and corrosion. Available in sizes ranging from 6mm to 75mm, they are widely used in the manufacturing of fasteners and other high-strength components.
These corrosion-resistant bars are available in a range of sizes. Stainless Steel 347H T-Bars provide excellent mechanical strength and are ideal for structural applications requiring high resistance to oxidation and corrosion.
The Stainless Steel 347H Bars from Mitchell Stainless find extensive use in environments that experience high temperatures and corrosive conditions. They are commonly employed in heat exchangers, boiler components, superheater tubes, furnace parts, and pressure vessels. Additionally, these bars are widely utilized in petrochemical plants, oil and gas processing facilities, and power generation systems where long-term thermal stability is crucial. They also serve well in chemical processing equipment and structural applications, showcasing their versatility and reliability in demanding settings.
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