ASTM A506 4140 Introduce
ASTM A506 4140 steel is a medium-carbon, cold-rolled steel that is commonly used in structural and automotive applications. Its unique combination of physical and mechanical properties gives it a number of advantages over other grades of steel, such as its high strength-to-weight ratio, corrosion resistance and superior ductility. Heat treatment can also be used to modify its properties for certain applications. With all these advantages, it's no wonder why ASTM A506 4140 steel is such a popular choice for many projects.
Smelting temperature:1396°C - 1152°C
Application:Hot-rolled and cold-rolled alloy steel sheets and strips of regular quality and high quality structure
ASTM A506 4140 Material Chemical Composition
The chemical composition of the ASTM A506 4140 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.3000 |
| Sulfur (S) | - | 0.0250 |
| PhOsphorus (P) | - | 0.0250 |
| Molybdenum (Mo) | 0.1500 | 0.2500 |
| Manganese (Mn) | 0.7500 | 1.0000 |
| Chromium (Cr) | 0.8000 | 1.1000 |
| Carbon (C) | 0.3800 | 0.4300 |
ASTM A506 4140 Material Mechanical Properties
The mechanical properties of the ASTM A506 4140 steel are as follows:
| YieldRp0.2 | ≤ 996 (MPa) |
| TeileRm | ≤ 568 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 12% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 212 |
ASTM A506 4140 Material Thermal Properties
The thermal performance parameters of the ASTM A506 4140 steel are as follows:
| Temperature (°C) | 41 | 533 | 396 |
| Modulus of elasticity (GPa) | - | 359 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 31.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 421 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 414 |
| Poisson’s coefficient, ν | - | - | 333 |
ASTM A506 4140 Material Machining Technology
ASTM A506 4140 steel has two main types. These include hot-rolled and cold-rolled. Hot-rolled steel is characterized by its uniform shape and good machinability, while cold-rolled steel has a better tolerance against corrosion. Depending on the application and end goal, one of these types of steel is used to produce various components and parts.