90.20 Standard under periodical review Oct 15, 2024
CEN
CEN/TC 459/SC 5 Steels for heat treatment, alloy steels, free-cutting steels and stainless steels
European Norm
27.020 Internal combustion engines | 77.140.10 Heat-treatable steels
1.1 This European Standard applies to the grades of wrought high-alloy materials listed in table 1. These valve materials are used for intake and exhaust valves in reciprocating internal combustion engines. It is applicable to bars, wire, rod and forgings and for the surface finishes listed in note 3 of 6.3. 1.2 This European Standard does not apply to alloys resistant to wear and corrosion which are used to protect valve seat surfaces.
PUBLISHED
EN 10090:1998
90.20
Standard under periodical review
Oct 15, 2024