Construction alloy steel for hardening and tempering 40H2MF,40HMFA,40KHMFA,40ChMFA,40XMФA - 

Construction alloy steel - for hardening and tempering chromium-molybdenum-vanadium 40H2MF PN-89/H-84030/04
Steel grade

Standard

Chemical composition (%)
C
Mn
Si
P
S
Cu
Cr
Ni
Mo
other
40H2MF
PN
0,38
0,45
0,50
0,80
0,17
0,37
max
0,035
max
0,035
max
0,30
1,60
1,90
max
0,30
0,30
0,40
V 0,15-0,25
40HMFA
40KHMFA
40ChMFA
40XMФA
GOST
0,37
0,44
0,40
0,70
0,17
0,37
max
0,025
max
0,025
max
0,30
0,80
1,10
max
0,30
0,20
0,30
V 0,10-0,18
W max 0,20
Ti max 0,03
N max 0,008
40ChMFA
BDS
0,37
0,44
0,40
0,70
0,17
0,37
max
0,025
max
0,025
max
0,30
0,80
1,10
max
0,30
0,20
0,30
V 0,10-0,18
W max 0,20
Ti max 0,03
 
Steel used in the automotive industry for the production of heavily loaded parts: gears, crankshafts, axles, etc. 
grades of the steel can be used also for parts operating at higher temperatures and for parts working at very low temperatures. 

40H2MF grade is provided as round-rolled bars, forgings, round bars, square bars, flat bars.
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