What is the difference between ss304 and ss305?
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The difference between SS304 and SS305 is often confused. Today, as a supplier with 18 years of experience in exporting stainless steel, I would like to explain the key differences between these two grades. I hope this helps you when choosing stainless steel products. If you have any questions related to your projects, feel free to contact us for assistance.
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SS304 vs SS305 stainless steel chemical composition
| Element | SS304 (%) | SS305 (%) |
|---|---|---|
| Carbon | ≤0.08 | ≤0.12 |
| Manganese | ≤2 | ≤2 |
| Phosphorus | ≤0.045 | ≤0.045 |
| Sulfur | ≤0.03 | ≤0.03 |
| Silicon | ≤1 | ≤0.75 |
| Chromium | 18 - 20 | 17 - 19 |
| Nickel | 8 - 10.5 | 10.5 - 13 |
| Nitrogen | ≤0.1 | - |
SS304 vs SS305 stainless steel mechanical properties
| Property | SS304 | SS305 |
|---|---|---|
| Tensile Strength (MPa) | ≥520 | ≥520 |
| Yield Strength (MPa) | ≥205 | ≥205 |
| Elongation (%) | ≥40 | ≥40 |
| Hardness (HB) | ≤187 | ≤187 |
SS304 vs SS305 stainless steel physical properties
| Property | SS304 | SS305 |
|---|---|---|
| Density (lbs per cu in) | 0.287 | 0.290 |
| Modulus of Elasticity (x 10⁶ psi) | 28 | 28 |
| Electrical Resistivity (microohm-in) | 432 | 432 |
| Thermal Conductivity (BTU per sq ft per hr per °F @ 68°F) | 9.4 | 9.4 |
| Coefficient of Thermal Expansion (inches per inch x 10⁻⁶ from 32°F - 212°F) | 9.6 | 9.6 |
Machinability:
SS304 has good machinability and is easy to perform various cold, hot working, and welding processes.
SS305 has a slower work hardening rate, making it more advantageous for deep processing, such as deep stamping and drawing. However, it requires more advanced processes and equipment for welding.
Magnetic Properties:
Both materials are usually non-magnetic or weakly magnetic, but SS304 may develop some magnetism after cold working, while SS305, due to its higher nickel content, is less likely to become magnetic.
Applications:
SS304 is widely used in various fields, including food processing, architectural decoration, medical equipment, chemical equipment, and more.
SS305 is mainly used in textile machinery parts, electronic components, and other applications requiring high fatigue resistance. It is also used to manufacture products that need non-magnetic materials.
