316 stainless steel is an austenitic stainless steel. Due to the addition of Mo element, it has a great improvement in corrosion resistance and high temperature strength. It can withstand high temperatures up to 1200-1300 degrees and can be used under harsh conditions.
The main uses are heat exchangers for pulp and paper equipment, dyeing equipment, film processing equipment, pipes, and materials for exterior use in coastal areas. Also used in the field of solenoid valves in 2013, mainly used for housings, clamps, spheres, valve bodies, valve seats, nuts, valve stems, etc.
chemical composition
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chemical composition/% |
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| Grade | C | Si | Mn | P | S | Ni | Cr | Mo | N | Other |
| 316 | ≤0.08 | ≤1 | ≤2 | ≤0.045 | ≤0.030 | 10.0~14.0 | 16.0~18.0 | 2.00-3.00 | — | |
Corrosion resistance
Corrosion resistance is better than 304 stainless steel, with good corrosion resistance in the production of pulp and paper. Moreover, 316 stainless steel is also resistant to erosion by marine and aggressive industrial atmospheres.
Heat resistance
316 stainless steel (06Cr17Ni12Mo2) has good oxidation resistance in intermittent use below 871 ° C (1600 ° F) and continuous use above 927 ° C (1700 ° F). In the range of 427 ° C – 857 ° C (800 ° F – 1575 ° F), it is preferable not to continuously use 316 stainless steel, but when 316 stainless steel is continuously used outside this temperature range, the stainless steel has good heat resistance. 316L stainless steel has better carbide precipitation resistance than 316 stainless steel and can be used in the above temperature range.
Heat treatment
Annealing is carried out at a temperature ranging from 850 to 1050 ° C, followed by rapid annealing and then rapid cooling. 316 stainless steel cannot be hardened by heat treatment.
welding
316 stainless steel has good welding properties. All standard welding methods can be used for welding. When welding, 316Cb, 316L or 309Cb stainless steel filler rods or welding rods can be used for welding according to the application. For best corrosion resistance, the welded section of 316 stainless steel requires post-weld annealing. If 316L stainless steel is used, post-weld annealing is not required.