UK B.S. BS 970, En19 Specialsteel Wrought steels for mechanical and allied engineering purposes and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | En19 | B.S. | UK | Wrought steels for mechanical and allied engineering purposes | 
| Si | S | P | Mo | Mn | Cr | C | 
|---|---|---|---|---|---|---|
| 0.1000 -0.4000 | ≤0.0400 | ≤0.0350 | 0.2500 -0.3500 | 0.7000 -1.0000 | 0.9000 -1.2000 | 0.3600 -0.4400 | 
| 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) | 
|---|---|---|---|---|---|---|
| 626 (≥) | 761 (≥) | 23 | 43 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 313 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 13 | - | - | 0.13 | - | |||
| 528 | 555 | - | 43.3 | 244 | - | ||
| 863 | - | 34 | 12.2 | 122 | 214 | 
Heat treated : 1528°C - 1383°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| S41400 | |||
| NV7 (4140) | |||
| H41400 | |||
| S41400 | |||
| AISI 4140 | |||
| SAE 4140 | |||
| UNS G41400 | |||
| AISI TS4140 | |||
| ASTM 4140 | |||
| UNS G41400 | |||
| ASTM 4140 | |||
| ASTM 4140H | |||
| UNS H41400 | |||
| 4140 | |||
| SAE 4140H | |||
| UNS H41400 | |||
| SAE 4140RH | |||
| ICI 4140 | |||
| SAE NV7(4140) | |||
| SAE NV7(4140) | 
| BS 970 | Wrought steels for mechanical and allied engineering purposes | BS-970.pdf | 
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