321 Stainless Steel Bars Manufacturer
Precision Alloys is a trusted manufacturer and supplier of 321 stainless steel bars in India, delivering heat-resistant and corrosion-resistant bars engineered to meet international standards like ASTM A276, ASME SA479, EN 10088, and DIN 1.4541. Our SS 321 bars are available in multiple shapes, sizes, and finishes—ideal for high-temperature and pressure applications across demanding industries.
What are 321 Stainless Steel Bars?
321 stainless steel bars are titanium-stabilized austenitic stainless steel bars known for excellent resistance to intergranular corrosion after welding or exposure to high temperatures. SS 321 bars are widely used in applications involving continuous or intermittent exposure to temperatures between 427°C – 900°C (800°F – 1650°F), making them ideal for aerospace, heat exchangers, exhaust systems, and refinery equipment.
321 Stainless Steel Bars Specifications
| Property | Specification |
|---|---|
| Material Grade | SS 321 |
| UNS Number | S32100 |
| EN / WNR | 1.4541 / X6CrNiTi18-10 |
| Shapes Available | Round, Square, Hexagonal, Flat |
| Size Range | 5mm – 200mm |
| Length | Up to 6 meters (Custom lengths available) |
| Surface Finish | Bright, Black, Polished, Peeled, Ground |
| Manufacturing Process | Hot Rolled, Cold Drawn, Centerless Ground |
| Tensile Strength | 515 – 650 MPa |
| Yield Strength | 205 MPa (min) |
| Hardness | 80 HRB (max) |
| Standards | ASTM A276, ASME SA479, EN 10088, DIN 1.4541 |
Types of 321 Stainless Steel Bars
321 Stainless Steel Bar Chemical Composition
| Element | % Composition |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5x C (min) |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
Mechanical Properties of 321 Stainless Steel Bars
| Property | Value |
|---|---|
| Tensile Strength | 515 – 650 MPa |
| Yield Strength | 205 MPa (min) |
| Elongation | 40% (min) |
| Hardness | 80 HRB (max) |
Applications of 321 Stainless Steel Bars
SS 321 bars are designed for high-temperature, high-pressure, and corrosive industrial environments:
Construction & Infrastructure
Automotive & Transportation
Marine & Offshore
Aerospace & Defence
Oil & Gas Industry
Manufacturing & Industrial Machinery
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