Hemi Metals, located in Hamilton, New Zealand, is a reliable manufacturer and supplier of top-notch Stainless Steel 347H Forgings, designed for high-temperature and pressure-critical industrial applications. SS 347H is a niobium-stabilized, high-carbon austenitic stainless steel that’s been specially crafted to provide exceptional creep strength and long-lasting thermal stability. These forgings are made using cutting-edge forging techniques, resulting in a refined grain structure, impressive load-bearing capacity, and precise dimensional accuracy. Hemi Metals caters to industries like power generation, petrochemical, refinery, and heavy engineering, where strength, reliability, and consistent high-temperature performance are vital.
Stainless Steel 347H is composed of about 17–19% chromium and 9–13% nickel, along with a higher carbon content and niobium stabilization to prevent carbide precipitation during high-temperature use. This unique blend offers remarkable resistance to intergranular corrosion and outstanding creep strength. Typically, SS 347H forgings boast a tensile strength ranging from 515–620 MPa and a yield strength of about 205–240 MPa, all while maintaining good ductility and impact toughness. The forged structure significantly enhances fatigue resistance, mechanical integrity, and load-bearing performance, especially under prolonged exposure to high temperatures and pressure.
| Standard | ASTM A182, ASME SA182 |
| Specification | DIN, ASTM, BS and all International Standards |
| Flat bar blocks | up to 27″ width and 15,000 lbs. |
| Cylinders and sleeves | up to 50″ maximum O.D. and 65″ maximum length |
| Discs and hubs | up to 50″ diameter and 20,000 lbs. |
| Rolled, hand forged or mandrel forged rings | up to 84″ maximum O.D. and 40″ maximum length |
| Rounds, shafts and step shafts | up to 144″ maximum length and 20,000 lbs. |
| Forging Types | Impression Die Forging, Open Die Forging, Seamless Rolled Forging, Hot Forging, Cold Forging, Open die hammer forging, Impression die drop forging, Closed Die Forging, Press Forging, Upset Forging, Compression Forging, Swaging, Rotary Forging, Roll forging. |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti | SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Yes, Stainless Steel 347H forgings can be used for potable water applications, offering excellent corrosion resistance and durability, particularly in high-temperature systems or environments with varying water quality.
Yes, Stainless Steel 347H forgings are highly suitable for high-temperature applications due to their niobium stabilization, which enhances resistance to oxidation, thermal stress, and intergranular corrosion at elevated temperatures.
Stainless Steel 347H Forgings find their place in various high-temperature and pressure-intensive settings where both strength and corrosion resistance are crucial. Common applications include components for boilers, superheaters, heat exchangers, pressure vessels, turbine hardware, and exhaust systems. In the petrochemical and power generation sectors, SS 347H forgings are utilized for valve bodies, flanges, fittings, expansion joints, and structural supports. They’re also essential in refinery systems, gas processing units, and thermal processing equipment, thanks to their excellent weldability.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hemi Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hamilton New Zealand
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