Stainless Steel Round Bar 321
Stainless Steel Round Bar 321 is a titanium-stabilized austenitic stainless steel with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C). The alloy resists oxidation to 1500°F (816°C) and has higher creep and stress rupture properties than alloys 304 and 304L. It also possesses good low-temperature toughness.
321 stainless is a titanium stabilized grade commonly used for service in the 1000-1600°F temperature range. For service temperatures up to about 1600°F, a stabilizing treatment at 1550-1650°F, air cool, may be used to provide optimum resistance to intergranular corrosion and to polythionic acid stress corrosion cracking.
321 stainless is readily welded by all common methods, including submerged arc. Appropriate weld fillers are AWS ER347 bare wire and E347 covered electrodes. 321 stainless is similar in machinability to 304 stainless steel. It has a machinability rating of 45% relative to AISI B1112.
Product Description
| Specification | ASTM A276 / ASTM A479 /ASTM A182 / ASME SA276 / ASME SA479 / ASME SA182 |
| Manufacturing Process | Hot Rolled / Cold Rolled / Hot Forging / Rolling / Machining |
| Dimension | Round Bars: Outside Diameter in the range of 4mm to 500mm Bright Bars: Outside Diameter in the range of 4mm to 200mm Hex Bars: 18mm to 57mm (11/16″ to 2-3/4″) Square Bars: 18mm to 57mm (11/16″ to 2-3/4″) Flat Bars: 1/2″ to 10″in thickness range of 2mm to 150mm, Custom Size Stainless Steel Flats available |
| Length | 2 meters to 7.5 meters ( 8 feet to 24 feet), or Custom Length as per Requirement |
| Finish | Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish |
| Dimension Standard | ASTM A 484 / ISO h11 / ISO K12 Tolerances F8 / h8, h9, h10, h11, h12, k12, k13, A-484, EN-10060, DIN-1013 etc. |
| Heat Treatment | Condition A, in which the bars are annealed Condition H in which the bars are hardened and tempered at a relative Temperature Condition T in which the bars are Hardened and Tempered at a relatively High Temperature Condition S in which the bars are Strain Hardened or relatively Light Cold Worked Condition B, in which the bars are relatively severely Cold worked. Solution Annealed, Aging, and Double Aging |
| Surface Finish | Centreless Ground & Belt Polished, up to Ra value = 0.2 μm (12 RMS), and Grit Polished of up to 180 to 600 |
| Packaging | Loose / Carrate / Wooden Pallet / Wooden Box / Plastic Cloth Wraps |
Chemical Composition Limits
| Weight% | C | Si | Mn | P+S | Cr | Ni | Ti | N | Fe | Cu | Mo |
| AMS 5510 Alloy 321 |
0.08 max | 0.25-1.00 | 2.0 max | 0.040P 0.030S |
17-19 | 9-12 | 0.7 max | 0.1 max | Bal | 0.75 max | 0.75 max |
Physical Properties
| Density | 0.287 lb/in3 |
| Ultimate Tensile Strength | 92.5 ksi |
| Yield Tensile Strength | 41.5 ksi |
| Shear Modulus | 11,000 ksi |
| Shear Strength | 64 ksi |
| Fatigue Strength | 36 ksi |
| Hardness Rockwell | Brinell | B92 | 190 |
| Elongation at Break Percentage | 42% |
| Reduction of Area | 65% |
| Modulus of Elasticity | 29,000 ksi |
| Poisson’s Ratio | 0.28 |
| Machinability Percentage | 36% |
| Melting Point | 2,550-2,600 °F |
| Specific Heat | 1.1 x 10^-1 BTU/lb-°F |
| Thermal Conductivity | 108 BTU-in/hr-ft^2-°F |
| Electrical Conductivity | 2.4% IACS |
Typical Mechanical Properties
| Material | Condition | Tensile Strength (ksi) | Yield Strength (ksi) | % Elongation | Hardness HB |
| Alloy 321 AMS 5510 |
AMS 5510 Sheet (Sol Trtd) | 70-100 | 25 | 40 | – |
| Alloy 321 AMS 5645 |
AMS 5645 Bar (Sol Trtd) | – | – | – | 255 max |
Applications
- Jet engine parts
- Heat-treated parts
- Expansion joints
- Turbo superchargers
- Exhaust manifolds.
Application
Agricultural Modernization
Construction Engineering
Environmental Protection Engineering
Food Processing Industry
Intelligent Home Appliances
Medical and Health Field
New Energy Infrastructure
