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Stainless Steel - Grade 316 , 316L, 317 , 317L
Types 316 (UNS S31600), 316L(S31603), 317 (S31700), and 317L (S31703) are molybdenum-bearing austenitic stainless steels which are more resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steels such as Type 304. These alloys also offer higher creep, stress-to-rupture and tensile strength at elevated temperature. In addition to excellent corrosion resistance and strength properties, the Types 316, 316L, 317, and 317L Cr-Ni-Mo alloys also provide the excellent fabricability and formability which are typical of the austenitic stainless steels.
| Chemical Analysis (%Weight) | |||||
|---|---|---|---|---|---|
| C | Cr | Ni | Mo | N | Mn |
| < 0,030 | 18 | 12,5 | 3,1 | 0.1 | 2.0 |
| Properties | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0,2 Y.S. - Rp 0,2min ASTM / EN | 0,2 Y.S. - Rp 0,2(2)typical value | UTS - Rm min ASTM / EN | UTS - Rm(2)typical value |
EI- A(1)% |
PREN(4) | Hardness | ||||
| MPa | Ksi | MPa | Ksi | MPa | Ksi | MPa | Ksi | |||
| 220 | 32 | 318 | 46 | 520 | 75 | 599 | 87 | 40 | 29 | 217HB |
Resistance to Corrosion: Types 316, 316L, 317 and 317L are more resistant to atmospheric and other mild types of corrosion than Types 302, 304 and 304L. In general, media that do not corrode Types 302, 304, and 304L, will not attack these molybdenum-containing grades. One known exception is highly oxidizing acids such as nitric acid to which the molybdenum-bearing stainless steels are less resistant.
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