| Category | Steel grade | Standard | Country | Application |
|---|---|---|---|---|
| Special Alloy | 1.4875 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | X55CrMnNiN20-8 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | 1.4871 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | X53CrMnNiN21-9 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | 1.4866 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | X33CrNiMnN23-8 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | 1.4718 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | 1.4731 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | X40CrSiMo10-2 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | X45CrSi9-3 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) |
| Special Alloy | NC20TA | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | NC15Fe7TA | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z85CDV18-02 | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z80CNS20-02 | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z60CMDVNb21-10Az | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z55CMN20-08Az | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z53CMNS21-09Az | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z53CMNNb21-09-02Az | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z53CMN21-09Az | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z50CMNNb21-09-02Az | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z45CS9 | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z45CNW18-09 | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z40CSD10 | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z35CNWS14-14 | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z25CNWS20-09 | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z20CN21-12Az | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z12CKNDWNb21-20-20 | AFNOR | France | Steel Exhaust Valves |
| Special Alloy | Z12CKNDWNb21-20-20 | AFNOR | France | The vent valve steel |
| Special Alloy | A35-586 347F20 | AFNOR | France | Resistant to high boron steel(NF A 36-580(1983)) |
| Special Alloy | Z6CNNb18.12B | AFNOR | France | Resistant to high boron steel(NF A 36-580(1983)) |
| Special Alloy | A35-586 321F20 | AFNOR | France | Resistant to high boron steel(NF A 36-580(1983)) |
| Special Alloy | Z6CNT18.12B | AFNOR | France | Resistant to high boron steel(NF A 36-580(1983)) |
| Special Alloy | A35-586 316F22 | AFNOR | France | Resistant to high boron steel(NF A 36-580(1983)) |
| Special Alloy | Z6CNDNb17.13B | AFNOR | France | Resistant to high boron steel |
| Special Alloy | A35-586 316F21 | AFNOR | France | Resistant to high boron steel |
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