It is an austenitic chromium-nickel alloy that contains molybdenum and nitrogen. This combination of elements makes it durable and provides it with a number of other desirable properties. The addition of molybdenum results in improved corrosion resistance with good stability against chloric and non-oxidizing acid. It has good heat resistance which reduces in continuous use at 425 – 861°C in water. It can be readily formed into different products. It has good machinability and is used in food processing equipment, boat fittings, bolts, nuts, and springs.
316L stainless steel plates are used in many fields and sectors of industries:
Architecture or construction: for façades, roofs, all types of cladding and other architectural elements, especially for outdoor and technical applications
Construction of specialised industrial plants: in the chemical, food, paper and cellulose production,
Mining, pharmaceutical, and petrochemical industries: for the construction of containers, silos, vessels, tanks, pipes, etc.
| Particular ranges of sulphur content may provide improvement of particular properties. For machinability a controlled sulphur content of 0.015 % to 0.030% is recommended and permitted. For weldability, a controlled sulphur content of 0.008 % to 0.030 % is recommended and permitted. For polishability, a controlled sulphur content of 0.015 % max is recommended. Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. |
| C | Si | Mn | Ni | P | S | Cr | Mo | N |
| max 0.03 | max 1 | max 2 | 10 – 13 | max 0.045 | max 0.015 | 16.5 – 18.5 | 2 – 2.5 | max 0.11 |
Mechanical properties of steel X2CrNiMo17-12-2 (1.4404)
| Rm – Tensile strength (MPa) (+A) | 490-700 |
| Rm – Tensile strength (MPa) (+AT) | 490-690 |
| Rm – Tensile strength (MPa) (+AT+C) | 750-780 |
| Rp0.2 0.2% proof strength (MPa) (+AT) | 190 |
| Rp0.2 0.2% proof strength (MPa) (+A) | 190-235 |
| KV – Impact energy (J) transverse, (+A) | +20° 60 | -196° 60 |
| KV – Impact energy (J) longitud., (+A) | +20° 100 |
| A – Min. elongation at fracture (%) (+A) | 30-45 |
| A – Min. elongation at fracture (%) longitud., (+AT) | 40 |
| Nominal diameter (mm): | 2 – 50 |
| Z – Reduction in cross section on fracture (%) | 63-68 |
| Brinell hardness (HB): (+A) | 215 |
| Brinell hardness (HB): (+AT) | 200 |
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