Construction alloy steel – for hardening and tempering 45HNMF - 45HNMFA - 

Construction alloy steel – for hardening and tempering nickel-chromium-molybdenum-vanadium
45HNMF / 45HNMFA  PN-89/H-84030/04
Steel grade

Standard

Chemical composition  (%)
C
Mn
Si
P
S
Cu
Cr
Ni
Mo
other
45HNMF
PN
0,42
0,50
0,50
0,80
0,17
0,37
max
0,035
max
0,035
max
0,30
0,80
1,10
1,30
1,80
0,20
0,30
V max
0,10 - 0,20
45HNMFA
PN
0,42
0,50
0,50
0,80
0,17
0,37
max
0,025
max
0,025
max
0,30
0,80
1,10
1,30
1,80
0,20
0,30
V max
0,10 - 0,20
45HN2MFA
45KHN2MFA
45ChN2MFA
45ХН2МФА

45HNMFA
45KHNMFA
45ChNMFA
45ХНМФА
GOST
0,42
0,50
0,50
0,80
0,17
0,37
max
0,025
max
0,025
max
0,30
0,45
0,75
1,30
1,80
0,20
0,30
V 0,10 - 0,18
Ti max 0,03
W max 0,20
N max 0,008
K 24045
A 290 CI G
UNS
ASTM
0,35
0,45
0,60
0,90
0,20
0,35
max
0,040
max
0,040
max
0,35
0,60
0,90
1,65
2,00
0,20
0,50
V max 0,10
K 24070
A 579 (22)
UNS
ASTM
0,38
0,44
0,60
0,90
0,20
0,35
max
0,025
max
0,025
-
0,70
0,90
1,65
2,00
0,30
0,60
V max
0,05 - 0,10
K 24070
A 288 (4)
UNS
ASTM
max
0,44
min
0,90
0,15
0,35
max
0,025
max
0,020
-
0,70
1,25
1,65
3,50
min
0,20
V max
0,07 - 0,12
40CrNiMoA
GB/T
0,37
0,44
0,50
0,80
0,17
0,37
max
0,025
max
0,025
max
0,25
0,60
0,90
1,25
1,65
0,15
0,25
-
 
Steel used for heavily loaded parts of machines, engines and vehicles: shafts subjected to torsion, transmission shafts, 
crankshafts, drills for stone, parts subjected to wear out and tear, mining machinery parts, highly loaded aircraft parts and 
road machines, parts and components of pumps, connecting rods. 

45HNMF / 45HNMFA grades are characterized by very high hardenability at hardening up to 170 mm, limited weldability. 

45HNMF / 45HNMFA grades or equivalent are provided as round-rolled bars, forgings, square bars, flat bars, 
plates, cubes, rings, rings.
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