What is the difference between SS 309 and 304 stainless steel?
ترك رسالة
304 stainless steel: mainly composed of chromium and nickel, without molybdenum, chromium content of 18%-20%, nickel content of 8%-10.5%.
309 stainless steel: chromium and nickel content are higher than 304, and contains a small amount of molybdenum, which increases its special properties.
304 stainless steel: performs well in general environment, but corrosion resistance may be reduced in chloride ion or acidic environment.
309 stainless steel: has excellent corrosion resistance, especially suitable for high temperature and high corrosion environment.
304 stainless steel: suitable for general high temperature environment, but high temperature performance is relatively limited.
309 stainless steel: mainly used in high temperature application scenarios, such as chemical industry, electric power and other fields, can maintain stable performance and strength at high temperature.
304 is widely used in construction, furniture and other fields; 309 is mainly used in high temperature equipment, heat exchangers and other fields that require high temperature resistance.
| | SS 304 | SS 309 |
|---|---|---|
| | - : 18%-20% - : 8%-10.5% - C: Less than or equal to 0.08% - |
- : Higher than 304 - : Higher than 304 - C: Less than or equal to {{0}}.18% (or Less than or equal to 0.08% in some cases) - |
| | - : Greater than or equal to 520 MPa - : Greater than or equal to 205 MPa - : Greater than or equal to 40% |
- : ≈520 MPa - : ≈205 MPa - : ≈40% - Higher strength at high temperatures |
