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  MATERIALS (continued) ______________________________________________________________________________

AISI 440C STAINLESS STEEL

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.

CHEMICAL COMPOSITION (%):
C
CARBON
Si
SILICON
Mn
MANGANESE
P
PHOSPHOROUS
S
SULPHUR
Cr
CHROMIUM
Mo
MOLYBDENUM
.44 - 46
.2 - .4
.2 - .4
Max .03
Max .01
12.8 - 13.2
Max .25
Hardness: 58 - 60 Rockwell 'C'

ES1 material exposed to hgh humidity
52100 material exposed to high humidity



 

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