This grade is capable of attaining, after heat treatment, the highest strength and wear resistant properties of all the stainless alloys. Its relatively high carbon content is responsible for these strength wear characteristics which make Type 440C particularly suited to such applications as ball bearings and valve parts.

Corrision Resistance:
Good resistance to the atmosphere, fresh water, foods alkalies and mild acids when in the hardened, tempered and passivated condition.

Heat Resistance:
Not recommended for use above 700 degrees F.

Heat Treatment:
Hardened by heating to 1850-1950 degrees F, cooling in oil and tempering to suit mechanical conditions as indicated in the accompanying table and graph. Annealing: Heat to 1550-1650 degrees F and slow cool.
NOTE: TEMPERING ABOVE 700 DEGREES F IS TO BE AVOIDED.

Welding:
If welding is necessary preheat at 500 degrees F and follow with a full anneal. Types 420, 309, and 310 filler rods can be used following this pre-heat and post-annealing proceedure.

Typical Applications:
High grade cutlery.
Surgical Tools
Bearings and races