Nakamura Stainless, located in Pulau Ujong, Singapore, is a well-known maker and supplier of high-quality stainless steel products, including stainless steel 321H bars. These bars are designed for high-temperature environments where strength, stability, and resistance to oxidation and intergranular corrosion are crucial. Stainless steel 321H is a high-carbon version of grade 321, which provides better creep strength and durability when exposed to high temperatures for long periods. Nakamura Stainless maintains precise manufacturing and strict quality checks, offering 321H bars that meet the tough standards of industries such as petrochemical, power generation, and aerospace.
Stainless steel 321H bars contain 17 to 19% chromium, 9 to 13% nickel, and titanium, with higher carbon content compared to standard 321. The increased carbon boosts high-temperature strength and creep resistance, while titanium stabilization stops carbide from forming during welding or prolonged heating. These bars generally have tensile strength between 520 and 750 megapascals and keep their shape at temperatures up to 900°C. 321H has excellent weldability, oxidation resistance, and thermal stability, making it fit for tough service conditions.
| Standard | ASTM A276 / A479, ASME SA276 / A479 |
| Round Bar Size | 3mm~ 800mm |
| Square Bar Size | 4mm* 4mm ~100mm* 100mm |
| Flat Bar Size | 2mm ~ 100mm |
| Hex Bar Size | 2mm ~ 100mm |
| Angle Size | 3mm* 20mm* 20mm~ 12mm* 100mm* 100mm |
| Thickness | 50 mm to 6000 mm Long |
| Length | 1 To 6 Meters, Custom Cut Length |
| Form | Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti | SS 321H | 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 % |
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At Nakamura Stainless, Our stainless steel 321H poles undergo rigorous testing, including tensile, hardness and chemical analysis to ensure they meet international standards. Each product incorporates certifications such as ISO, ASTM, and mill test reports, providing reliability, durability and performance for a variety of industrial applications
Stainless Steel 321H Round Bars are designed for high-temperature applications, offering excellent oxidation resistance and mechanical strength. Ideal for use in aerospace, chemical processing, and high-temperature industrial components where durability and resistance to thermal degradation are crucial.
Stainless Steel 321H Flat Bars provide superior strength and resistance to high temperatures and oxidation. Suitable for manufacturing structural components, heat exchangers, and exhaust systems, these bars are used in industries where high performance under extreme conditions is required.
Stainless Steel 321H Square Bars are engineered for high-stress, high-temperature environments. They are commonly used in aerospace, petrochemical, and power generation industries for components such as reactor vessels, furnace parts, and structural supports due to their excellent thermal stability and strength.
Stainless Steel 321H Rectangular Bars offer high resistance to thermal and oxidation damage, making them suitable for high-temperature applications like furnace components, chemical processing equipment, and structural supports in demanding environments.
Stainless Steel 321H Hexagonal Bars provide exceptional strength and thermal stability, ideal for use in high-temperature applications such as gas turbines, exhaust systems, and chemical processing equipment. Their resistance to carbide precipitation ensures durability under extreme conditions.
Stainless Steel 321H T-Bars are utilized in high-temperature and high-stress environments, offering excellent strength and resistance to oxidation. They are commonly used in structural applications, including supports and frames in the aerospace, chemical processing, and energy sectors.
Stainless steel 321H bars are commonly used in high-temperature and high-pressure situations where resistance to thermal fatigue and corrosion is vital. Typical applications include heat exchangers, furnace parts, superheaters, exhaust manifolds, and boiler equipment. These bars are especially suitable for power plants, petrochemical facilities, and refineries. Their ability to handle thermal cycling and maintain strength over time ensures reliable performance in systems that experience continuous or intermittent high temperatures.
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