The use of 440C material has declined in
favor of other, more modern stainless steel formulations. However,
it is still widely available and has very high resistance to
corrosion.
CHEMICAL COMPOSITION (%):
C
CARBON
Si
SILICON
Mn
MANGANESE
P
PHOSPHOROUS
S
SULPHUR
Cr
CHROMIUM
Mo
MOLYBDENUM
.95 -
1.2
Max 1.0
Max 1.0
Max .04
Max .03
16 - 18
Max
.75
Hardness: 58
- 60 Rockwell 'C'
ES1 STAINLESS
STEEL
This is a relatively new stainless steel
formulation with excellent machinability that allows raceway finish
characteristics approaching those of chrome steel, combined with a
corrosion-resistance at least the equal of AISI 440C.
