1.4401

X5CrNiMo17-12-2

Austenitic stainless steel, substantially harmful chlorides, acid i to intergranular corrosion resistant grains used in the environment. 316 / 316L is the base grade from the Molybdenum CrNiMo group and significantly increases the pitting and crevice corrosion resistance of steel 2-3 times. 1.4404 / 1.4401 quality materials are suitable for use in a phosphoric environment. alkalis - hydroxides and salts - nitric, citric, lactic, formic, acetic acids in the presence of nitrates, chlorides, fluorides , acetates and sulphates. 1.4401 quality stainless steel materials also resist the marine environment and salts.

Corrosion Resistance

316 grade stainless steel has excellent corrosion resistance when exposed to a range of corrosive environments and environments. Generally considered "marine grade" stainless steel, it is not resistant to warm seawater. Hot chloride environments can cause pitting and crevice corrosion. 316 grade is also subjected to stress corrosion cracking above 60 ° C.

Weldability

Fusion welding performance for 316 stainless steel is excellent, both filled and unfilled. 316 and 316 recommended filler rods and electrodes for, respectively, 316 and 316 are identical to the parent metal. Heavily welded sections may require post-weld annealing. 316Ti quality can be used as an alternative to 316 in heavy section welds .

Oxyacetylene welding has not been found to be successful in joining 316 stainless steel.

Hot Processing

All common hot working methods can be performed on 316 stainless steel. Hot processing below 927 ° C should be avoided. Ideal for hot working temperature range 1149-1260 ° C 'is. Post-work annealing is recommended to ensure optimum corrosion resistance.

Cold Processing

Grade 316 is easily braked or rolled into various pieces. It is also suitable for stamping, heading and drawing, but post-working annealing is recommended to reduce internal stress.

Cold working will increase both the strength and hardness of 316 stainless steel.