3> 21-4NWNb=X50=VA63=1.4882
2> 5Cr9Si3=SUH1=HNV3=1.4718=X45 ;
1> 21-4N=SUH35=EV-8=1.4871=X53 ;
Engine Valve Steel
Engine Valve Steel
1> 21-4N=SUH35=EV-8=1.4871=X53 ; 2> 5Cr9Si3=SUH1=HNV3=1.4718=X45 ; 3> 21-4NWNb=X50=VA63=1.4882
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Special Use: | Valve Steels |