303 Stainless Steel
UNS S30300
Description
Alloy 303 is a non-magnetic, austenitic, free-machining stainless steel specifically designed to improve machinability while maintaining good mechanical and corrosion resistance. Due to the presence of sulfur in the steel composition, alloy 303 is the most readily machineable austenitic stainless steel. However, the addition of sulfur will negatively affect the corrosion resistance of 303 stainless steel, making its corrosion resistance lower than 304 stainless steel. The alloy is non-magnetic in annealed state, but it may become slightly magnetic due to cold working.
Chemical Component
| C | Mn | P | S | Si | Cr | Ni | Fe |
|---|---|---|---|---|---|---|---|
| 0.12% max | 2.00% max | 0.20% max | 0.150% min | 1.00% max | 17.00-19.00% | 8.00-10.00% | Balance |
Basic Information
| Items | 303 Stainless Steel |
|---|---|
| Catalog | ACMA-Fe-A006 |
| Density | 0.283 lb/in3, 8.00 g/cm3 |
| Electrical Resistivity, ohm-cir-mil/ft | At 70 °F: 433.0 |
| Specific Heat, BTU/lb-°F (J/g-°C) | 32-212 °F (0-100 °C): 0.12(0.5) |
| Thermal Conductivity, BTU-in/hr-ft2-°F (W/m·K) | At 212 °F (100 °C): 112 (16.20) |
| Mean Coefficient of Thermal Expansion, µin/in-°F (µm/m-°C) | 68-392 °F (20-200 °C): 9.3 (16.7) |
| Modulus of Elasticity, KSI (MPa) | 28 x 103 (193 x 103) in tension |
| Melting Range, °F (°C) | 2550-2590 (1400-1420) |
Material Forms
Alfa Chemistry offers 303 stainless steel in a variety of forms, including Wire, Strip, Plate, Sheet.
Mechanical Properties
| Conditions | Ultimate Tensile Strength | Yield Strength | Elongation |
|---|---|---|---|
| Annealed | 75 KSI min (517 MPa min) | 25 KSI min (172MPa min) | 35% min |
Specifications
Wire: AMS 5640, ASTM A314, ASTM A581, ASTM A582, QQ-S-764
Applications
- Medical Instruments
- Shafts
- Valves
- Fittings
- Intricate parts that can only be made by machining
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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Alfa Chemistry is a manufacturer of standard & custom specialty metals & alloys. We stock a wide variety of alloys in different shapes and specifications. If you can't find the product or specification you need, please contact us directly.
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