303 Stainless Steel Bars Manufacturer
What are 303 Stainless Steel Bars?
303 stainless steel bars are austenitic stainless steel bars specially formulated with added sulfur to improve machinability. While it offers slightly reduced corrosion resistance compared to SS 304, SS 303 is widely used for precision machining applications, especially in automotive, aerospace, electronics, and industrial equipment.
303 Stainless Steel Bars Specifications
| Property | Specification |
|---|---|
| Material Grade | SS 303 |
| UNS Number | S30300 |
| EN / WNR | 1.4305 / X8CrNiS18-9 |
| Shapes Available | Round, Square, Hexagonal, Flat |
| Size Range | 5mm – 200mm |
| Length | Up to 6 meters (Custom lengths available) |
| Surface Finish | Bright, Peeled, Ground, Polished |
| Manufacturing Process | Cold Drawn, Centerless Ground, Precision Machined |
| Tensile Strength | 500 – 750 MPa |
| Yield Strength | 190 – 300 MPa |
| Hardness | 85 – 95 HRB |
| Standards | ASTM A582, ASME SA479, EN 10088 |
Types of 303 Stainless Steel Bars
303 Stainless Steel Bar Chemical Composition
| Element | % Composition |
|---|---|
| Carbon (C) | 0.10 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 8.0 – 10.0 |
| Sulfur (S) | 0.15 – 0.35 |
| Phosphorus (P) | 0.20 max |
Mechanical Properties of 303 Stainless Steel Bars
| Property | Value |
|---|---|
| Tensile Strength | 500 – 750 MPa |
| Yield Strength | 190 – 300 MPa |
| Elongation | 35% (min) |
| Hardness | 85 – 95 HRB |
Applications of 303 Stainless Steel Bars
SS 303 bars are the go-to choice for high-speed machining, making them ideal for:
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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Frequently Asked Questions
What makes SS 303 more machinable than SS 304?
Can SS 303 be used in corrosive environments?
Is SS 303 magnetic?
Do you provide ground or turned SS 303 bars?
What is the delivery time for custom 303 bar sizes?
