France AFNOR X45CrSi9-3 Valve Internal Combustion Engines steel (NF-EN 1009-1998) and X45CrSi9-3 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Type | Steel Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Valve Steel | X45CrSi9-3 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) | 
| Z50CMNNb21-09-02Az | |||||
| Z53CMN21-09Az | |||||
| Z53CMNNb21-09-02Az | |||||
| Z53CMNS21-09Az | |||||
| Z55CMN20-08Az | |||||
| Z60CMDVNb21-10Az | |||||
| Z80CNS20-02 | |||||
| Z85CDV18-02 | |||||
| NC15Fe7TA | |||||
| NC20TA | 
| C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Ni(%) | 
|---|---|---|---|---|---|---|
| 0.40-0.50 | 2.70-3.30 | Max 0.60 | Max 0.040 | Max 0.030 | 8.00-10.0 | Max 0.50 | 
| Yield Rp0.2 (MPa) | Tensile Rm (MPa) | Impact KV/Ku (J) | Elongation A (%) | Reduction in cross section on fracture Z (%) | As-Heat-Treated Condition | Brinell hardness (HBW) | 
|---|---|---|---|---|---|---|
| 322 (≥) | 477 (≥) | 34 | 23 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 133 | 
| Temperature (°C) | Modulus of elasticity (GPa) | Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) | Specific thermal capacity (J/kg·°C) | Specific electrical resistivity (Ω mm²/m) | Density (kg/dm³) | Poisson’s coefficient, ν | 
|---|---|---|---|---|---|---|---|
| 43 | - | - | 0.31 | - | |||
| 185 | 662 | - | 41.3 | 332 | - | ||
| 165 | - | 12 | 14.2 | 444 | 424 | 
Heat treated : 1521°C - 1654°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| X45CrSi9-3 | AFNOR | France | Valve Internal Combustion Engines steel (NF-EN 1009-1998) | 
| ISO X45CrSi9 3 | ISO | ISO | ISO standard valve martensite steel | 
| EN X45CrSi9-3 | EN | Euronorm | Euronorm Stainless Steel | 
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