What is 305 stainless steel
305 stainless steel is an austenitic chromium–nickel stainless steel known for its excellent formability, low work-hardening rate, and superior deep-drawing performance. It is widely used in parts that require extensive cold forming—such as appliance components, drawn housings, kitchen equipment, and electronic hardware.
Chemical Composition of 305 Stainless Steel
|
Element |
Typical Content (%) |
Purpose |
|
Chromium (Cr) |
17.0–19.0 |
Corrosion resistance |
|
Nickel (Ni) |
10.5–13.0 |
Higher nickel improves formability |
|
Carbon (C) |
≤ 0.12 |
Strength and structure |
|
Manganese (Mn) |
≤ 2.0 |
Formability |
|
Silicon (Si) |
≤ 1.0 |
Oxidation resistance |
|
Nitrogen (N) |
≤ 0.10 |
Strength |
|
Iron (Fe) |
Balance |
Base material |
Mechanical Propertie
|
Property |
Typical Value |
|
Tensile Strength |
520 MPa |
|
Yield Strength |
205 MPa |
|
Elongation |
40–50% |
|
Hardness (Annealed) |
≤ 88 HRB |
|
Density |
8.0 g/cm³ |
Key Features & Advantages
①Outstanding Deep-Drawability
High nickel stabilizes the austenitic structure and minimizes work hardening, allowing complex shapes without cracking.
② Low Work-Hardening Rate
Unlike 301 or 304, 305 remains ductile longer during forming—ideal for multi-step drawing.
③ Non-Magnetic After Cold Work
High nickel prevents magnetic transformation, making 305 suitable for electronic components.
④ Good Corrosion Resistance
Comparable to 304 stainless steel in many indoor and mildly corrosive environments.
⑤ Smooth Surface Finish
Provides a clean, bright appearance for consumer products and professional kitchen equipment.
Is 305 Stainless Steel the Right Choice for You?
Choose 305 if you need:
✔ Deep-drawn or heavily formed components
✔ Non-magnetic parts
✔ Smooth surface with good visual quality
✔ Moderate corrosion resistance at a mid-range cost
Conclusion
305 stainless steel is a specialized austenitic grade designed to excel in deep drawing and complex forming applications. With its higher nickel content, low work-hardening rate, and clean surface finish, it is widely used in appliances, electronics, food equipment, and decorative components.
If your application requires heavy forming with consistent surface quality, 305 stainless steel is one of the best options in the 300-series.
Post time: Dec-11-2025
