40Mn2 1340/1341 40Mn5 SMn2
|
40Mn2
|
Comparision of steel grades
|
|
|
ASTM/AISI
|
1340/1341
|
|
|
BS
|
-
|
|
|
NF
|
40 M5
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|
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DIN
|
-
|
|
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JIS
|
SMn2
|
|
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ISO 683/1
|
-
|
|
|
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
|
-
|
|
Grade
|
Properties in hardened
and tempered condition
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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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