Stainless steel powders

Steels with more than 10% Cr

Steels containing more than approximately 10% Cr are defined as stainless materials. Depending on the amount of Cr and other alloying elements such as Ni and Mo, properties like mechanical strength and corrosion resistance are defined.

Höganäs' standard PM grades are all low-carbon versions and optimised for compaction and sintering/heat treatment. The grades can be categorised in three groups: austenitic, ferritic and ferritic/martensitic.

Compressibility differs between the austenitic and ferritic grades, but the biggest difference is workability for a fully dense material. Most shapes can be made with both powder types so only corrosion resistance needs to be taken under consideration.

 Powder grade Cr Ni Mo Nb
304 L 18.5 % 11.0 %    
316 L 17.0 12.0 2.2  
Cold 100 20.0 19.0 6.5  
409 L 12.0   19.0 0.5
434 L 17.0      
410 L 12.0      
430 L 17.0      

Austenitic grades

304 L is a standard austenitic grade.

316 L contains Mo for better resistance to localised corrosion. The highest corrosion resistance is exhibited by the "Cold 100"-material, which is a super-austenitic material for higher chloride contents and high-temperature corrosions in e.g. hot gases.

Application examples are lock parts, small gears, cams and connectors.

Ferritic and ferritic/martensitic grades

These materials have  a very attractive cost/performance ratio but a somewhat lower corrosion resistance in some environments compared to the austenitic materials.

Application examples are automotive exhaust flanges and hot exhaust gas oxygen (HEGO) sensor bosses.