SS 321 Round Bar Manufacturer
SS 321 Round Bar is a high-performance, titanium-stabilised austenitic stainless steel product renowned for its exceptional resistance to intergranular corrosion and high-temperature strength. Specifically designed for service in the 427–870°C (800–1600°F) temperature range, it is the preferred choice for applications involving continuous or intermittent heating and welding.
At [Your Company Name], we manufacture and supply SS 321 Round Bars in a wide range of sizes and finishes, suitable for various industrial applications where superior thermal resistance and corrosion durability are essential.
What is SS 321 Round Bar?
SS 321 is a stabilised grade of 18/8 stainless steel, enhanced with titanium to improve resistance against intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range. Unlike SS 304, which can be prone to corrosion in such conditions, SS 321 maintains its integrity due to the titanium’s ability to bind with carbon.
SS 321 round bars are manufactured through hot or cold rolling and are finished using machining or grinding. These bars are available in annealed, pickled, or polished conditions, depending on the requirement.
Specifications – SS 321 Round Bars
| Parameter | Specification |
|---|---|
| Product Name | SS 321 Round Bar |
| Diameter Range | 6 mm to 350 mm |
| Length | 1000 mm to 6000 mm (Custom lengths available) |
| Finish Available | Bright, Black, Peeled, Polished |
| Condition | Annealed / Hardened / Tempered / Cold Drawn |
| Form | Round Bars, Shafts, Rods |
| Manufacturing Process | Hot Rolled / Cold Drawn / Forged |
| Tolerance Standard | ISO h9 / h10 / h11 |
| Material Grade | AISI 321 / ASTM A276 / A479 |
| Delivery Condition | Mill Finish, Heat Treated, Custom Finish |
| Certification | EN 10204 3.1 / 3.2, NACE MR0175, IBR, PED Certified |
Chemical Composition – SS 321 Round Bars
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5 x C (min 0.60) |
| Iron (Fe) | Balance |
Mechanical Properties – SS 321 Round Bars
| Property | Value |
|---|---|
| Tensile Strength | 515 – 750 MPa |
| Yield Strength (0.2% Proof) | ≥ 205 MPa |
| Elongation (in 50mm) | ≥ 40% |
| Modulus of Elasticity | ~193 GPa |
| Hardness | ≤ 217 HB (Brinell) |
| Impact Toughness | Excellent at cryogenic temps |
| Melting Point | ~1400°C |
Applications of SS 321 Round Bars
SS 321 round bars are used in diverse industries that demand durability under elevated temperatures and corrosive environments. Some major applications include:
Construction & Infrastructure
Automotive & Transportation
Marine & Offshore
Aerospace & Defence
Oil & Gas Industry
Manufacturing & Industrial Machinery
Why Choose Precision Alloy?
- ISO 9001:2015 Certified Manufacturer
- Wide Range of Stainless Steel Bar Shapes & Sizes in Stock
- Surface Finish Options for Decorative or Industrial Use
- Customized Machining & Fast Lead Times
- Global Delivery with Competitive Pricing
