Chung Metal manufactures high-performance Stainless Steel 321H Rectangular Bars, a titanium-stabilized, heat-resistant austenitic stainless steel. SS 321H is the carbon content-enhanced version of SS 321 with superior creep strength for service in elevated temperatures. The rectangular bar form best suits high-stress structural usage, welded thermal parts, and oxidizing condition-exposed flat plates. Chung Metal guarantees uniform mechanical properties, clean surface, and accurate thickness in each and every 321H rectangular bar, ensuring that they are suitable for applications in the power, oil, and gas sectors.
SS 321H has 17–19% chromium, 9–12% nickel, titanium stabilization, and carbon content of 0.04–0.10%. It provides tensile strength of 550–750 MPa, 200–300 MPa of yield strength, and 30–40% elongation. The material is not magnetic and can be used for continuous service up to 900°C. The rectangular shape provides structural integrity and convenient fabrication into thermal equipment and supports welded together. Chung Metal supplies these bars in industrial sizes and heat-treated conditions.
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.
321H rectangular bars are applied in furnace hardware, heat exchangers, pressure vessels, thermal expansion bellows, and welded high-temperature assemblies. They are resistant to intergranular corrosion and scaling at high temperatures and thus suitable for aerospace, refinery, and power plant usage. Their flat shape enables application in thermal cycling-exposed mounting frames, welded plates, and machinery bases. SS 321H is the first choice in applications where there is a need for both thermal strength and weld integrity. Chung Metal offers custom-length 321H rectangular bars for high thermal and mechanical stress service.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chung Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Da Nang, Vietnam
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