What is 303 Stainless Steel Free-Machining Austenitic?
303/S30300 is a high-performance metal alloy used in various industrial applications. This comprehensive guide covers chemical composition, mechanical properties, and machining characteristics.
Chemical Composition
| Element | Content (%) | Standard |
|---|---|---|
| C | 0.27-0.35 | ASTM/GB |
| Mn | 0.50-0.80 | ASTM/GB |
| P | ≤0.035 | ASTM/GB |
| S | ≤0.035 | ASTM/GB |
| Si | 0.17-0.37 | ASTM/GB |
| Fe | Balance | ASTM/GB |
Mechanical Properties
| Property | Value | Standard |
|---|---|---|
| Tensile Strength | ≥515 MPa | ASTM |
| Yield Strength | ≥205 MPa | ASTM |
| Elongation | ≥15% | ASTM |
| Hardness | Material dependent | HV |
| Density | 7.90 g/cm³ | 20°C |
Key Features
- Excellent mechanical properties for demanding applications
- Good corrosion resistance in various environments
- Suitable for CNC machining with proper parameters
- Widely used in industrial manufacturing
Common Applications
- CNC machined precision parts
- Industrial equipment components
- Marine and offshore applications
- Automotive and aerospace industries
Machinability & CNC Processing
303 has good machinability with proper tool selection:
- Cutting Speed: 80-150 m/min (Carbide tools)
- Feed Rate: 0.1-0.3 mm/rev
- Tool Material: YG6/YG8 Carbide
- Coolant: Soluble oil or synthetic
Why Choose Us for 303 Parts?
At CNC Machining Factory, we specialize in precision machining:
- ✅ Material expertise and technical support
- ✅ Advanced 3/4/5-axis CNC equipment
- ✅ ISO 9001 certified quality control
- ✅ Fast turnaround: 3-5 days prototype
- ✅ Competitive factory pricing
Need a quote? Contact us today with your drawings!
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