SS 303 Round Bar Manufacturer
Precision Alloy is a trusted SS 303 Round Bar Manufacturer and Global Supplier, offering high-quality machining-grade stainless steel bars tailored for precision engineering, high-speed turning, and automatic screw machines. SS 303 offers the best machinability among austenitic stainless steels, making it ideal for industries where productivity and surface finish matter most.
We supply SS 303 round bars in a wide range of diameters, surface finishes, and tolerances, fully compliant with ASTM A276 / A582, and available with MTCs and optional third-party inspection.
What is SS 303 Round Bar?
Stainless Steel 303 is an austenitic stainless steel specially designed for improved machinability through the addition of sulfur. It retains good corrosion resistance, strength, and toughness while offering superior performance in CNC, lathe, and screw machine operations. Though not recommended for marine or chloride environments, SS 303 is ideal for high-speed manufacturing and dry machining.
SS 303 Round Bar Specifications
| Property | Details |
|---|---|
| Standard | ASTM A276 / A582, ASME SA276 |
| Diameter Range | 6 mm to 200 mm |
| Length | Up to 6 meters or custom cut-to-length |
| Tolerance | h9, h10, or as specified |
| Finish | Bright, Peeled, Ground, Black |
| Forms | Cold Drawn, Hot Rolled, Centerless Ground |
| Certification | MTCs, NABL-certified test reports, TPI on request |
Chemical Composition
| Element | % Composition |
|---|---|
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 8.0 – 10.0 |
| Sulfur (S) | 0.15 – 0.35 |
| Carbon (C) | ≤ 0.10 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.20 |
| Iron (Fe) | Balance |
Mechanical Properties
| Element | % Composition |
|---|---|
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 8.0 – 10.0 |
| Sulfur (S) | 0.15 – 0.35 |
| Carbon (C) | ≤ 0.10 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.20 |
| Iron (Fe) | Balance |
Applications of SS 303 Round Bars
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
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