Stainless Steel AISI 310

Nr. 1.4845 / AISI 310 / UNS S31000 is a very common austenitic steel that applied in the high temperature environment. Due to its high content of chromium and nickel, it performs better in corrosion resistance while compared with AISI 304.

AISI 310 one of the materials that has the best performance on heat and high temperature resistance. When it is put into continuous use, it can tolerate the temperature at the maximum of 1100 degrees. Under such high temperature, its internal structure is still very even. The even structure has great influences on the corrosion resistance for the stainless-steel materials.

Generally, this stainless steel can be divided into AISI310, 310S and 310H according to their carbon content:

AISI 310: C<0.250%

AISI 310S: C<0.080%

AISI 310H: 0.040%<C<0.100%

 

And with the increasing content of carbon, the corrosion resistance of this steel will be poorer, and its welding ability will also be lowered.

 

Chemical Components of Stainless 310:

Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel
0.25 max	2.00 max	0.045 max	0.030 max	1.50 max	24.00-26.00	19.00-22.00

Application of Stainless Steel 310:

Alloy AISI310 can be continuously used under the temperature reaching 1500 degree, and put into intermittent use when temperature is under 1090 degree. It has good resistance toward oxidation, carburizing and sulfur, and it has been proved to be resistant to marine atmosphere.

 

Forged Stainless Steel 310:

This alloy shall be forged at the temperature of 2150ºF (1175ºC), and close to the temperature 1800ºF (980ºC). For small parts, they all be directly treated with fast cooling in air or water quenching after forging. If these parts are treated with annealing after forge, they will obtain the best corrosion resistance.

 

Heat Treatment of AISI 310 Stainless Steel:

Annealing:

The parts made by this stainless steel shall be annealed under the temperature at 1900/2050ºF (1040/1120ºC), and treated with water quenching.

 

Processing:

The machine made by AISI310 is like other 18/8 machines, which can also provide tough and slender cuttings. And its maximum feeding and low speed have offered the best machinability. Besides, treating the steel bars with slight cold work will improve the finish of its surface.

 

Welding:

AISI310 can be welded with shielded fusion and resistance method. However, carbon accumulation shall be avoided when treated with oxyacetylene welding. And the risk of cracking for this stainless steel is small. If there is need to filled with metal, it is suggested to use the rod in AISI310. And after welding, intergranular corrosion will be avoided if treating with annealing.