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40Mn2 1340/1341 40Mn5 SMn2

40Mn2 1340/1341 40Mn5 SMn2

40Mn2 1340/1341 40Mn5 SMn2

 
 
40Mn2
 
Comparision of steel grades
ASTM/AISI
1340/1341
BS
-
NF
40 M5
DIN
-
JIS
SMn2
ISO 683/1
-

Chemical Composition


 

Grade
C
Si
Mn
P max
S max
Ni max
Cr max
Cu max
others
40Mn2
0.35-0.45
0.20-0.40
1.60-1.80
0.03
0.03
0.3
0.309
0.25
-

Mechanical Properties
 


 

Grade
Properties in hardened
and tempered condition
Normalizing
Temperature
Hardening
Temperature
Quenching
medium
Temperating
Temperature
Tensile strength
Kgf/m㎡
Yield stress Min
Kgf/m㎡
40Mn2
60-75
40
840-870
840-870
Oil
550-660

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