1.4571 Cold Drawn

EN/DIN

AISI/SAE/ASTM

Flat stainless steel grade 316Ti (1.4571) contains a small amount of titanium. Titanium content is typically only around 0.5% . Titanium atoms stabilize the structure of 316 at temperatures above 800 ° C. This prevents carbide precipitation at the grain boundaries and protects the metal from corrosion. The main advantage of 316Ti is that it can be kept at higher temperatures for longer without sensitivity (precipitation) occurring. 316Ti retains physical and mechanical properties similar to standard 316 grades.

Corrosion Resistance

Grade 316 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.

Heat resistance

316 has good resistance to oxidation up to 870 ° C in intermittent service and up to 925 ° C in continuous service . However, continuous use at 425-860 ° C is not recommended if corrosion resistance in water is required. In this case, 316L is recommended because of its resistance to carbide precipitation.

Where high strength is required at temperatures above 500 ° C, grade 316H is recommended .

Cold start

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

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

Hot Process

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

Machinability

316 flat stainless steel has good machinability . Processing following rules a compliance could be improved:

Cutting edges should be kept sharp. Blind edges cause overworking to harden.

The cuts should be light but deep enough to prevent hardening by getting on the surface of the material.

Chip breakers should be used to help keep chips out of business.

The low thermal conductivity of austenitic alloys causes heat to condense at the cutting edges. This means that coolants and lubricants are required and must be used in large quantities.

Weldability

Fusion welding performance for 316 stainless steel is excellent, both filled and unfilled. 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.

Physical Properties

Austenitic stainless steels, which have a very suitable combination in terms of forming, mechanical properties and corrosion resistance, constitute approximately 70-80% of stainless steel production in terms of usage area and alloy variety. These alloys feature high toughness and high strength values ​​in a wide temperature range and show good resistance to oxidation at temperatures up to 540 ° C. Austenitic chrome-nickel stainless steels are generally used in humid environments. The most common austenitic stainless steel type is 300 series alloys such as types 304 and 316. Austenitic stainless steels have a wide range of applications due to their superior properties. aircraft industry, panels, fuel pipes, wires, tanks in the chemical industry, pipes: condensers, milk tanks, transport tanks, fermentation vessels in the food industry, mixers, bottling machines, boiling pots, pharmacy, chemistry and petrochemical, computer keys springs and architecture.

Special Properties

It is soft at all temperatures. It has good resistance to high temperature oxidation up to 900 ° C. It has high friction ability. It is susceptible to stress corrosion cracking. It can be welded, bent and expanded without heat treatment.

Chemistry, petrochemical and food industry, pipes and heat exchangers, boilers and furnaces, varnish, synthetic resin rubber, and pump compressor parts in the motor fuel industries, nuclear engineering.

Chemical Composition