Hemi Metals, located in Hamilton, New Zealand, is a reliable manufacturer and supplier of top-notch Stainless Steel 321H Rectangular Bars, specifically designed for high-temperature and pressure-critical industrial applications. SS 321H is a titanium-stabilized, high-carbon austenitic stainless steel that’s built to deliver exceptional strength and thermal stability even at elevated temperatures. With meticulous attention to dimensional accuracy, a smooth surface finish, and rigorous quality control, these rectangular bars promise outstanding mechanical reliability and a long service life. Hemi Metals caters to industries like power generation, petrochemical, refinery, aerospace, and heavy engineering, where high-temperature performance and corrosion resistance are crucial.
Stainless Steel 321H is composed of about 17–19% chromium and 9–12% nickel, featuring a higher carbon content than SS 321, along with titanium stabilization to prevent carbide precipitation during high-temperature use. This unique composition grants it excellent resistance to intergranular corrosion and significantly boosts its high-temperature strength. Typically, SS 321H rectangular bars exhibit tensile strength ranging from 515–620 MPa and yield strength around 205–240 MPa, while also offering good ductility, impact toughness, and creep resistance. These bars are non-magnetic when annealed and maintain stable mechanical properties even after prolonged exposure to high temperatures.
Standard : 321H / 1.4878
Range : 3.17mm to 350mm dia
Designation : ASTM A276, ASME SA276
Finish : Bright, Black, Polish
Thickness: 4.0mm – 100mm
Type: Bright Bar, Black Bars, Hex Bar, Square Bar, Rods, Polish Bar, Forged Bar, Round Bar
Length : Random, Fix & Cut Length
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Ti |
| 321H | 0.04 – 0.10 | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 – 19 | 3 – 4 | 9 – 12 | – | 4xC min 0.60% max |
| Density | 8.0 g/cm3 |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000, MPa – 205 |
| Elongation | 35 % |
| Standard | SS 321H |
| UNS | S32109 |
| WERKSTOFF NR. / DIN | 1.4878 |
Choose Stainless Steel 321H Rectangular Bars based on their excellent high-temperature resistance and resistance to carbide precipitation in welding applications. Consider mechanical strength, corrosion resistance, and desired thermal stability for specific use cases.
Stainless Steel 321H Rectangular Bars generally do not require corrosion protection coatings due to their inherent corrosion resistance. However, coatings can be applied for enhanced protection in aggressive environments or specific applications.
Yes, Stainless Steel 321H Rectangular Bars can be welded, offering excellent weldability. However, using appropriate filler materials and controlling heat input is essential to prevent carbide precipitation and maintain corrosion resistance.
Stainless Steel 321H Rectangular Bars find extensive use in high-temperature and pressure-intensive settings where both strength and corrosion resistance are essential. Common applications include boiler structures, superheater supports, heat exchanger frames, furnace components, exhaust system supports, and parts for pressure vessels. In the petrochemical and power generation sectors, SS 321H rectangular bars are utilized for piping frameworks, valve bodies, structural supports, and expansion joints.
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
Copyright 2024 Hemi Metals. All rights reserved
