ASTM A276 303 (UNS S30300) Stainless Steel Rod
Premier Super 303 Stainless Steel Rod Manufacturer in China
ASTM A276 303 (UNS S30300) is the foremost choice for applications demanding superior machinability. As a free-machining variant of the classic 18-8 austenitic stainless steel, its composition is modified with the addition of sulfur. This key difference significantly enhances its machinability, allowing for higher cutting speeds, reduced tool wear, and excellent surface finishes, which makes it ideal for use in automatic screw machines. This austenitic stainless steel offers a cost-effective and highly reliable solution for a wide range of industrial and manufacturing projects, delivering outstanding performance in complex, precision-machined components.
Discover high-quality 303 stainless steel rod products here.
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Characteristics of 303 Stainless Steel
- Exceptional Machinability: The defining characteristic of Type 303 stainless steel is its outstanding machinability, the best among all austenitic grades.
- Good Corrosion Resistance: It offers good resistance to corrosion in mild atmospheric and less aggressive chemical environments.
- Non-Magnetic Properties: In its annealed (non-hardened) condition, Type 303 is generally non-magnetic.
- Versatile for Intricate Components: Its superior machinability makes it the material of choice for producing a wide array of intricate, high-precision components.
- Generally Not Recommended for Welding: Weldable with precautions (e.g., ER312 filler + low heat input), but challenging for critical uses.
- Balanced Mechanical Properties: This grade offers a suitable balance of strength and ductility for a wide range of applications.
- Cost-Effective for High-Volume Production: Type 303 boosts productivity – faster machining and longer tool life deliver cost savings that outweigh its slight price premium over Type 304 in mass production.
- Good High-Temperature Oxidation Resistance: It exhibits good resistance to oxidation in intermittent service up to 760°C and in continuous service up to 870°C.
ASTM A276 303 (UNS S30300) Stainless Steel Technical Specifications
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.15 max |
| Chromium (Cr) | 17.0 - 19.0 |
| Nickel (Ni) | 8.0 - 10.0 |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.20 max |
| Sulfur (S) | 0.15 min |
| Property | Typical Value |
|---|---|
| Tensile Strength | 85,000 psi (approx. 586 MPa) |
| Yield Strength (0.2% Offset) | 45,000 psi (approx. 310 MPa) |
| Elongation | 50% |
| Hardness, Rockwell B | 180 |
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1400 °C (2550 °F) |
| Modulus of Elasticity | 193 GPa |
| Thermal Conductivity | 15.1 W/m-K |
| Electrical Resistivity | 720 nΩ·m |
- UNS： S30300
- WERKSTOFF NR.： 1.4305
- EN： 1.4305
- JIS： SUS 303
- BS： 303S31
Common Applications of 303 Stainless Steel
Fasteners and Fittings Manufacturing
Mechanical and Automotive Engineering
Aerospace Industry
Electrical and Electronic Components
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303 Stainless Steel Rod Customization
Beyond our extensive standard stock, we offer comprehensive processing services to deliver ASTM A276 303 (UNS S30300) stainless steel rods that meet your exact project specifications.
- Custom Diameters and Lengths: We provide precision cutting services to deliver rods in the specific lengths your project requires.
- Wide Range of Diameters: Rods are available in a comprehensive range of diameters, from small to large, suitable for all types of machining applications.
- Surface Finishing and Polishing: Select from a range of surface finishes. Polishing services are also available for aesthetic or specific functional requirements.
- Value-Added Machining Services: Chamfering, facing & custom part manufacturing per your drawings to optimize production efficiency.
Contact our technical team to discuss your custom fabrication needs.
Contact Us
Your project’s success hinges on the use of superior materials. We supply certified ASTM A276 303 stainless steel rods that meet rigorous industry standards, ensuring absolute confidence in your machining performance and the longevity of your components. As your dedicated partner, we utilize our vast inventory and advanced processing services to meet your exact specifications, from standard stock to fully customized parts. We deliver not just a product, but a promise of unwavering quality and reliability for your most demanding production runs.
Ready to begin? Contact our expert team for a detailed, no-obligation quote and professional material consultation. We are here to discuss your technical requirements and provide a tailored solution with competitive pricing and on-time delivery. Let us simplify your procurement process and help bring your project to life with the support it deserves. Send your inquiry now to secure the premium free-machining materials you need.
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