SS 304 & 304L Round Bar Manufacturer
Precision Alloys is a reliable and certified manufacturer of SS 304 and 304L Stainless Steel Round Bars, catering to a wide spectrum of industries including construction, petrochemical, food processing, and fabrication. These austenitic stainless steel bars are widely known for their excellent corrosion resistance, weldability, and mechanical performance, making them one of the most versatile stainless steel grades.
We supply both standard and custom-dimension bars in various surface finishes, lengths, and diameters. With adherence to ASTM, ASME, DIN, EN, and other international standards, our 304/304L bars are ready for global dispatch.
What Are SS 304 & 304L Round Bars?
SS 304 is the most commonly used stainless steel grade due to its excellent corrosion resistance, formability, and strength. SS 304L is the low-carbon variant, specifically developed to improve weldability and eliminate the risk of intergranular corrosion after welding or heat exposure.
Both grades provide durable performance in ambient and moderately aggressive environments, and are suited for both structural and hygienic applications.
Specifications – SS 304 & 304L Round Bars
| Specification | Details |
|---|---|
| Standards | ASTM A276 / A479, ASME SA276 / SA479 |
| Sizes Available | 6 mm to 250 mm diameter |
| Length | Up to 6 meters or custom cut-to-length |
| Tolerance | h9, h10 or as per drawing |
| Form | Hot Rolled, Cold Drawn, Centerless Ground |
| Finish Options | Bright, Black, Peeled, Polished |
| Documentation | Mill Test Certificates (MTC), NABL-certified testing, and Third-Party Inspection (TPI) |
Chemical Composition – SS 304 & 304L Round Bars
| Element | SS 316 (%) | SS 316L (%) |
|---|---|---|
| Chromium (Cr) | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 | 2.0 – 3.0 |
| Carbon (C) | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 |
| Iron (Fe) | Balance | Balance |
Mechanical Properties – SS 304 & 304L Round Bars
| Property | SS 316 | SS 316L |
|---|---|---|
| Tensile Strength | 515 – 760 MPa | 485 – 700 MPa |
| Yield Strength | ≥ 205 MPa | ≥ 170 MPa |
| Elongation | ≥ 40% | ≥ 40% |
| Hardness | ≤ 95 HRB | ≤ 95 HRB |
| Modulus of Elasticity | ~193 GPa | ~193 GPa |
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