AISI 303 Stainless Steel Properties, SS 303 Density, Hardness, Magnetic, Equivalent (UNS S30300)
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Family: Stainless Steel
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Cr | 17.0-19.0 |
| Ni | 8.0-10.0 |
| Notes | Free-Machining Stainless Steel Bars |
| C, ≤ | 0.15 |
| P, ≤ | 0.20 |
| S, ≥ | 0.15 |
| Mn, ≤ | 2.00 |
| Si, ≤ | 1.00 |
| AISI (UNS) | Billets and bars for forging |
| AISI Type (UNS) | 303 (UNS S30300) |
| Grade (Steel Number) | X8CrNiS18-9 (1.4305) |
| ISO Name (ISO Number) | X10CrNiS18-9 (4305-303-00-I) |
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Description
AISI 303 stainless steel (UNS S30300) was developed for easy cutting and basically belongs to 18-8 stainless steel. It improves the cutting performance while maintaining good mechanical properties. SS 303 material has a higher sulfur content, which reduces the resistance on the cutting tool, but has a negative impact on the corrosion resistance, so the corrosion resistance is not as good as AISI 304 stainless steel. The following datasheet give 303 stainless steel properties including chemical composition, physical and mechanical properties, heat treatment, welding, etc. SS 303 material chemical composition is listed in the following table based on cast analysis.