Stainless Steel 321 Bars are titanium stabilized austenitic stainless bars which are capable of resisting intergranular corrosion during and after welding. Supplied by Andre Stainless in Singapore, 321 bars are suitable for those applications with frequent changes of temperature up to 870°C. They have good mechanical properties, corrosion resistance, and weldability, particularly where carbide precipitation during welding would normally reduce performance. 321 is a non-hardenable stainless steel for use in oxidising atmospheres. It is commonly used in high-temperature ducting, exhaust systems, and furnace components. Andre Stainless supplies these bars in different sizes and finishes, to ASTM specifications.
SS 321 contains ~17–19% chromium, ~9–12% nickel, ≤0.08% carbon, and titanium ≥5x carbon content. The alloy provides tensile strength of ~520 MPa, yield strength ~205 MPa, elongation ~40%, and hardness ~150 HB. Titanium stabilizes against the formation of chromium carbide during welding and thermal cycling. 321 is not magnetic in the annealed condition and has high strength and oxidation resistance to ~870°C. It is not for use at cryogenic temperatures but is excellent for high temperature service, providing consistent corrosion resistance in oxidizing and neutral environments.
Standard : 321 / 1.4541
Range : 3.17mm to 350mm dia
Designation : ASTM A276, ASME SA276
Finish : Bright, Black, Polish
Thickness: 4.0mm – 100mm
Type: Bar, Bright Bar, Black Bars, Hex Bar, Square Bar, Rods, Polish Bar, Forged Bar, Round Bar
Length : Random, Fix & Cut Length
Grade | Mn | N | P | C | S | Cr | Mo | Si | Ni | Other | |
321 Stainless Steel Nuts | minimum maximum | 2.00 | 0.10 | 0.045 | – 0.08 | 0.030 | 17.0 19.0 | – | 0.75 | 9.0 12.0 | Ti=5(C+N) 0.70 |
Grade | Tensile Strength (MPa) minimum | Yield Strength 0.2% Proof (MPa) minimum | Elongation (% in 50mm) minimum | Hardness | |
Rockwell B (HR B) maximum | Brinell (HB) maximum | ||||
321 Stainless Steel Nuts | 515 | 205 | 40 | 95 | 217 |
Contact us to get a quick quote for your requirement.
At Andre Stainless, 321 stainless steel panels are rigorously tested to ensure compliance with international quality standards. Necessary documentation, including material test reports (MTRs), chemical and mechanical analyses, and third-party testing certificates, is provided to ensure reliability, durability and accurately defined for industrial applications
Stainless Steel 321 Round Bars Corrosion-resistant product with excellent high-temperature stability. Available in diameters from 0.5″ to 12″, ideal for aerospace and chemical processing applications where durability is critical.
Stainless Steel 321 Flat Bars This product offers superior resistance to oxidation and is available in thicknesses from 0.25″ to 6″ and widths up to 12″. Perfect for structural and high-temperature applications.
Stainless Steel 321 Square Bars Corrosion-resistant product designed for strength, available in sizes ranging from 0.5″ to 6″ on each side. Suitable for industrial applications requiring high-temperature performance.
This Corrosion-resistant product with dimensions from 0.5″ x 1″ to 6″ x 12″. Ideal for use in heavy-duty applications and structures where thermal stability is essential.
Stainless Steel 321 Hexagonal Bars Corrosion-resistant product available in sizes from 0.5″ to 4″ across flats. Used in aerospace and chemical industries where high-temperature resistance is required.
Stainless Steel 321 T-Bars Corrosion-resistant product with dimensions ranging from 0.5″ x 0.5″ to 6″ x 6″. Suitable for structural support and applications demanding high-temperature stability and strength.
Stainless Steel 321 Bars find frequent application in aircraft exhaust systems, heat exchangers, chemical process tanks, and refinery equipment. They find their best applications in welded parts exposed to sustained high heat and thermal expansion like furnace linings, mufflers, and piping. Their titanium stabilization protects them from weld decay, guaranteeing long service lives under thermal cycling. 321 bars are also applied in bellows, expansion joints, and superheater tubing where scaling and thermal fatigue resistance are key. Their excellent corrosion resistance in oxidizing conditions qualifies them for use in pharmaceutical, food processing, and aerospace heat-treatment fixtures.
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