Internal Combustion Engine Valve Steels :
Engine Valve Steels graded highly alloyed (Mn-ni-cr-Mo-N) magnetic
and Non-magnetic steels, used for inlet & Exhaust Valves
and shafts for Bimetallic Valves, which function under severly
stressed conditions.
Intemation
Standards of Valve Steels
IS
DIN
BS
SAE
JIS
X45Cr9Si3
/X50Cr9Si2
1.4718
X45CrSi93
EN52
HNV3
SUH 1/
SUH 11
Cr11SI2Mo1
1.4731
X40CrSimo82
--
--
SUH 3
X85CrMOv18-2
1.4748
X85CrMoV182
--
--
--
X55Cr21Mn8Ni2N
1.4875
X55CrMnNiN208
21-2N
EV 12
--
X53Cr22Mn9Ni4N
1.4871
X53CrMnNiN219
21-4N
EV 8
SUH 35
X20Cr21Ni12N
--
21.12 N
EV4
SUH 37
--
1.4866
X33CrNiMN238
23-8N
EV16
--
--
1.4882
X50CrMnNiNb219
21-43
EV 8+Nb
--
Chemical
Combustion
DIN
C
Si
Mn
Pmax
S max
Cr
Mo
Ni
N
V
W
Nb
1.4718
0.40
0.50
2.75
3.75
0.80
max
0.040
0.040
7.50
9.50
--
0.50
max
--
--
--
--
SUH 11
0.45
0.55
1.00
2.00
0.60
max
0.040
0.035
7.50
9.50
--
0.60
max
--
--
--
--
1.4731
0.35
0.45
1.80
2.50
0.60
max
0.040
0.040
10.00
12.00
0.70
1.30
0.60
max
--
--
--
--
1.4748
0.80
0.90
1.00
max
1.50
max
0.040
0.030
16.50
18.50
2.00
2.50
--
--
0.30
0.60
--
--
1.4875
0.50
0.60
1.00
max
7.00
9.50
0.050
0.035
20.00
22.00
--
1.50
2.75
0.20
0.40
--
--
--
1.4871
0.48
0.58
0.25
max
8.00
10.00
0.050
0.035
20.00
23.00
--
3.25
4.50
0.38
0.55
--
--
--
21-12N
0.15
0.25
0.75
1.25
1.50
max
0.050
0.035
20.00
22.00
--
10.50
12.50
0.15
0.30
--
--
--
1.4866
0.28
0.38
0.50
1.00
1.50
3.50
0.040
0.030
22.00
24.00
--
7.00
9.00
0.25
0.50
--
--
--
1.4882
0.45
0.55
0.45
max
8.00
10.00
0.040
0.030
20.00
22.00
--
3.50
5.00
0.40
0.60
--
0.80
1.50
1.90
2.50
Size
Range
Dia. : 5.00 mm to 40mm
Dim. Tol. : h9, +/-0.05, +/-0.05,
+/-0.10 and Black
Supply
Conditions
Martensitic grades are
supplied in the Hot Rolled, Annealed or Hardened &
Tempered Condition.
Austentic grades are suppplied in
Hot Rolled & Solution Annealed Condition.
Centreless ground/ Peeled/Hot Rolled
Black condition.
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