SAE J1268 4817H Introduce
SAE J1268 4817H steel is well-suited for use in automotive and aerospace applications. It can be used for components such as engine blocks, crankshafts, pistons, cylinder liners, wheels, and frames. It is also commonly found in aircraft, such as propellers, wing spars, and fuselage components. It is available in sheet, plate, and bar forms, with a wide range of thicknesses available. Its resistance to corrosion makes it an excellent choice for marine vessels and boat trailers.
Smelting temperature:1775°C - 1167°C
Application:Hardenability bands for carbon and alloy H steels
SAE J1268 4817H Material Chemical Composition
The chemical composition of the SAE J1268 4817H steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.3500 |
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | 3.2000 | 3.8000 |
| Molybdenum (Mo) | 0.2000 | 0.3000 |
| Manganese (Mn) | 0.3000 | 0.7000 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | - | 0.2000 |
| Carbon (C) | 0.1400 | 0.2000 |
SAE J1268 4817H Material Mechanical Properties
The mechanical properties of the SAE J1268 4817H steel are as follows:
| YieldRp0.2 | ≤ 131 (MPa) |
| TeileRm | ≤ 142 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 13% |
| Reduction in cross section on fractureZ | 13% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 422 |
SAE J1268 4817H Material Thermal Properties
The thermal performance parameters of the SAE J1268 4817H steel are as follows:
| Temperature (°C) | 14 | 416 | 264 |
| Modulus of elasticity (GPa) | - | 564 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 31.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 341 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 433 |
| Poisson’s coefficient, ν | - | - | 333 |