Hemi Metals, located in Hamilton, New Zealand, is a reliable manufacturer and supplier of top-notch Stainless Steel 347H Square Bars and Rods, specifically designed for high-temperature and pressure-critical industrial applications. SS 347H is a niobium-stabilized, high-carbon austenitic stainless steel that’s built for exceptional creep strength and long-lasting thermal stability. With a focus on precise dimensions, sharp square profiles, and rigorous quality control, these square bars and rods guarantee outstanding mechanical reliability. Hemi Metals provides SS 347H square bars to industries like power generation, petrochemical, refinery, and heavy engineering, where high-temperature strength and corrosion resistance are vital.
Stainless Steel 347H is composed of about 17–19% chromium and 9–13% nickel, featuring a higher carbon content and niobium stabilization to avoid carbide precipitation during high-temperature use. This composition ensures excellent resistance to intergranular corrosion and remarkable creep strength. Typically, SS 347H square bars deliver a tensile strength of around 515–620 MPa and a yield strength close to 205–240 MPa, along with good ductility and impact toughness. These bars are non-magnetic when annealed and maintain stable mechanical properties even after prolonged exposure to high temperatures.
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A582, A276, A564, ASTM A484, 484M
Surface : hrap, hot rolled pickled or sand blasting finished, cold drawn, polished, hairline
Size : Tolerance: H8, H9, H10, H11, H12, H13K9, K10, K11, K12
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 347H | 0.04 – 0.10 | 17.0 – 19.0 | 2.00 max. | 9.0-12.0 | 0.045 max. | 0.03 max. | 0.75 max. |
| Element | Density | Melting Range,℃ | Tensile Strength | Yield Strength | Elongation | Hardness (Brinell) |
| SS 347H | 7.96 | 1450 ℃ | 515 | 205 | 40 | 201 |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 347H | 1.4550 | S34709 |
| SQUARES | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.62 | 2.05 |
| 18 | 0.79 | 2.59 |
| 20 | 0.76 | 2.49 |
| 22 | 1.18 | 3.87 |
| 25 | 1.52 | 5.00 |
| 28 | 1.91 | 6.27 |
| 30 | 2.19 | 7.20 |
| 32 | 2.50 | 8.19 |
| 36 | 3.16 | 10.37 |
| 38 | 3.52 | 11.55 |
| 40 | 3.90 | 12.80 |
| 45 | 4.94 | 16.20 |
| 50 | 6.10 | 20.00 |
| 56 | 7.65 | 25.08 |
| 60 | – | – |
| 65 | – | – |
| 70 | – | – |
| 75 | – | – |
| 80 | – | – |
| 90 | – | – |
| 100 | – | – |
Stainless Steel 347H Square Bars offer excellent high-temperature strength, resistance to intergranular corrosion, and superior weldability. They are ideal for applications in extreme environments, such as chemical processing and heat exchangers.
Yes, Stainless Steel 347H Square Bars are fully recyclable and retain their properties after recycling. This makes them an environmentally sustainable choice for various applications.
No, Stainless Steel 347H Square Bars are generally non-magnetic in their annealed condition. However, slight magnetism may develop after cold working.
Stainless Steel 347H Square Bars and Rods find extensive use in high-temperature and high-pressure settings where both strength and corrosion resistance are crucial. You’ll often see them in applications like boiler structures, superheater supports, heat exchanger frames, furnace components, exhaust system supports, and pressure vessel parts. In the petrochemical and power generation sectors, SS 347H square bars are utilized for valve bodies, structural supports, expansion joints, and piping frameworks. They’re also employed 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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