List of stainless for the generation turbine applications (for reference)

Chemical composition (%) ( * typical )

Steel Type 12Cr 12Cr-MoV 12Cr-MoVW
Equivalent AISI 403 AISI 410 X20CrMoV 12 1 X22CrMoV 12 1 AISI 422*
Country of
Origin
US/UK US/UK Germany Germany USA
C <=0.15 <=0.15 0.17-0.23 0.18-0.24 0.23
Si 0.20-0.35 <=1.0 <=0.50 0.10-0.50 0.40
Mn 0.46-0.53 <=1.0 <=1.0 0.30-0.80 0.60
Cr 11.5-13.0 11.5-13.0 10.0-12.5 11.0-12.5 12.5
Ni - - 0.30-0.80 0.30-0.80 0.70
Mo - - 0.80-1.20 0.80-1.20 1.0
V - - 0.25-0.35 0.25-0.35 0.25
Nb - - - - -
W - - - - 1.0
N - - - - -
B - - - - -
Others 0.015Cu
0.05Al
- - - -
Applications Blade
Rotor
Blade Blade
Bolt
Blade
Bolt
Blade
Tube

Chemical composition (%) ( * typical )

Steel Type 12Cr-MoVNb
Equivalent H46* TAF* X19CrMoVNbN 11 1 COST 'F'*
Country of
Origin
UK Japan Germany Europe
C 0.15 0.18 0.16-0.22 0.11
Si 0.40 0.30 0.10-0.50 0.03
Mn 0.60 0.50 0.30-0.80 0.52
Cr 12.0 10.5 10.0-11.5 10.2
Ni 0.50 - 0.30-0.80 0.60
Mo 0.50 1.5 0.50-1.00 1.4
V 0.30 0.20 0.10-0.30 0.18
Nb 0.25 0.15 0.15-0.50 0.05
W - - - -
N 0.050 - 0.05-0.19 0.056
B - 0.030 <=0.01 0.001
Others - - - -
Applications Blade
Rotor
Blade
Rotor
Blade
Bolt
Blade
Rotor

TAF is registered trademark of Hitachi Metals, Ltd.

Chemical composition (%) ( * typical )

Steel Type 12Cr-MoVNbW 12Cr-MoVNbWCu 12Cr-MoVNbWCo
Equivalent na COST 'E'* na FV535
Country of
Origin
na Europe na UK
C <=0.14 0.12 0.07-0.14 0.06-0.11
Si <=0.50 0.10 <=0.50 0.10-0.70
Mn 0.40-0.70 0.45 <=0.70 0.60-1.15
Cr 11.0-13.0 10.4 10.0-12.5 9.8-11.2
Ni   0.75 <=0.50 0.20-0.80
Mo 0.80-1.20 1.1 0.25-0.60 0.50-1.00
V 0.20-0.30 0.18 0.15-0.30 0.10-0.35
Nb <=0.20 0.045 0.04-0.10 0.20-0.45
W 0.8-1.2 0.8 1.5-2.5 <=0.70
N - 0.052 0.04-0.10 0.010-0.035
B - 0.0002 <=0.005 0.005-0.012
Others - - 0.3-1.7Cu
<=0.04Al
5.0-7.0Co
Applications Blade
Rotor
Blade
Rotor
Blade
Rotor
Blade
Rotor
Bolt

Chemical composition (%) ( * typical )

Steel Type 12Cr-MoNiV 17-4PH 15-5PH PH13-8Mo
Equivalent M152* X5CrNiCuNb 17 4 - X3CrNiMoAl 13 8 2
Country of
Origin
USA Germany - Germany
C 0.1 <=0.07 <=0.07 <=0.05
Si 0.25 <=1.00 <=1.00 <=0.10
Mn 0.65 <=1.00 <=1.00 <=0.10
Cr 11.7 15.0-17.5 14.0-15.5 12.25-13.25
Ni 2.65 3.00-5.00 3.50-5.50 7.50-8.50
Mo 1.6 - - 2.00-2.50
V 0.28 - - -
Nb - - - -
W - - - -
N - - - -
B - - - -
Others - 3.0-5.0Cu
0.15-0.45(Nb+Ta)
2.5-4.5Cu
0.15-0.45(Nb+Ta)
0.90-1.35Al
Applications Blade
Rotor
Bolt
Blade Blade Blade

TAF is registered trademark of Hitachi Metals, Ltd.