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What is A815 S31803
Duplex stainless steels are extremely corrosion-resistant, work-hardenable alloys. Their microstructure consists of a mixture of austenitic and ferrite phases. Thus, duplex stainless steels display the properties of both austenitic and ferritic stainless steels. This combination of properties implies some compromises compared to pure austenitic and pure ferritic steel grades.
Duplex stainless steels are, in most cases, harder than ferritic stainless steels. The strength of duplex stainless steels can be twice that of austenitic stainless steels in some cases.
Although duplex stainless steels are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steels.
A815 S31803 Mechanical Properties
| Mechanical Property | Value |
| Proof Stress | 450 Min MPa |
| Tensile Strength | 620 Min MPa |
| Elongation A50 mm | 25 Min % |
| Hardness Brinell | 290 Max HB |
A815 S31803 Chemical Composition
| Element | Content (%) |
|---|---|
| Iron, Fe | 63.75-71.92 |
| Chromium, Cr | 21.0-23.0 |
| Nickel, Ni | 4.50-6.50 |
| Molybdenum, Mo | 2.50-3.50 |
| Manganese, Mn | 2.0 |
| Silicon, Si | 1.0 |
| Nitrogen, N | 0.080-0.20 |
| Carbon, C | 0.030 |
| Phosphorous, P | 0.030 |
| Sulfur, S | 0.020 |
A815 S31803 Application:
