ICI 4340
USA AISI ICI 4340 and ICI 4340 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Type | Steel Grade | Standard | Country | Application |
|---|---|---|---|---|---|
| Steel Grades | Special Alloy | ICI 4340 | AISI | USA | |
| ASTM 5N | |||||
| ASTM 6N | |||||
| ICI 4020 | |||||
| ASTM 7Q | |||||
| ICI 4130 | |||||
| ICI 4140 | |||||
| ASTM 8Q | |||||
| ICI 4330 | |||||
| ASTM 9Q | |||||
| ASTM 10Q |
Chemical composition(mass fraction)(wt.%) of the ICI 4340
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | Mo(％) | W(%) | Cu(%) |
|---|---|---|---|---|---|---|---|---|---|
| 0.35-0.45 | 0.20-0.80 | 0.70-1.00 | Max 0.04 | Max 0.045 | 0.70-0.90 | 1.65-2.00 | 0.20-0.30 | Max 0.10 | Max 0.50 |
Mechanical Properties of steel grade ICI 4340
| 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) |
|---|---|---|---|---|---|---|
| 462 (≥) | 256 (≥) | 13 | 31 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 133 |
Physical Properties of steel grade ICI 4340
| 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 | – | – | 0.43 | – | |||
| 243 | 259 | – | 24.3 | 422 | – | ||
| 948 | – | 21 | 31.2 | 224 | 242 |
Heat Treatment of steel grade ICI 4340
Heat treated : 1914°C – 1176°C
Technological Curves of steel grade ICI 4340
No Curve
Cross Reference Table (Equivalent Grade) of ICI 4340
| Grade | Standard | Country | Application |
|---|---|---|---|
| ICI 1020 | AISI | USA | |
| ICI 1030 | AISI | USA | |
| ICI 1040 | AISI | USA | |
| ICI 1050 | AISI | USA | |
| ICI 6120 | AISI | USA | |
| ICI 4020 | AISI | USA | |
| ICI 4130 | AISI | USA | |
| ICI 4140 | AISI | USA | |
| ICI 4330 | AISI | USA | |
| ICI 4340 | AISI | USA | |
| ICI 4620 | AISI | USA | |
| ICI 6150 | AISI | USA | |
| ICI 8620 | AISI | USA | |
| ICI 8630 | AISI | USA | |
| ICI 52100 | AISI | USA | |
| OTA10TiMoNiCil70 | STAS/SR | Romania | Cast Steel |
| Q195 | GBT | China | Engineering and welding |
| Q215 | China | Engineering and welding | |
| Q215 B | China | Engineering and welding | |
| Q235 | China | Engineering and welding |