Grade 1.4305

1.4305 – The Machining Stainless Steel for Maximum Precision and Efficiency

1.4305, also known as AISI 303, is an austenitic stainless steel specially developed for machining applications. Due to its high sulfur content, it offers excellent machinability, making it ideal for use where high precision and efficiency are required. This free-cutting steel is the preferred choice in precision engineering and the production of complex components.

Key Properties of 1.4305

Excellent Machinability

1.4305 contains sulfur, which improves chip formation and allows for efficient processing on lathes and milling machines.

Good Corrosion Resistance

While 1.4305 has slightly lower corrosion resistance compared to other austenitic steels such as 1.4301 due to its sulfur content, it still offers adequate resistance to moisture and mild chemicals in many environments.

Excellent Surface Finish

The alloy enables the production of components with smooth, precise surfaces – a crucial advantage in precision engineering and automation technology.

Not Suitable for Welding

Due to its sulfur content, 1.4305 is only conditionally weldable. For applications requiring welding, alternatives such as 1.4301 are more appropriate.

Technical Specifications and Advantages

• Material number: 1.4305 (X8CrNiS18-9) according to DIN EN 10088-1
• Alloying elements:
• Chromium (approx. 17–19%), Nickel (approx. 8–10%), Sulfur (approx. 0.15–0.35%), balance iron
• Tensile strength: 500–700 MPa
• Delivery forms: Available as round and square bars and profiles
• Surface finishes: Turned, ground, or polished

Typical Applications of 1.4305

Precision Engineering

Perfect for producing precision parts such as gears, spindles, bolts, and nuts requiring tight tolerances.

Automation Technology

Used in machine components like shafts, guides, and couplings that require high-precision manufacturing.

Electronics Industry

Used in small parts such as connectors, contacts, or housings where machinability and dimensional accuracy are critical.

General Mechanical Engineering

Used in components that require easy machining combined with good corrosion resistance.

Conclusion

1.4305 is the ideal stainless steel for producing precise, complex components in large quantities. Its exceptional machinability makes it particularly economical and versatile. For applications where efficiency and dimensional accuracy are key, 1.4305 is the perfect choice. Contact us for more information or a quote tailored to your specific requirements.

Frequently Asked Questions (FAQ) about 1.4305