ASTM A675/A675M Grade 45 Introduce
ASTM A675/A675M Grade 45 is a versatile metal alloy that is widely used in various industries, ranging from construction and manufacturing to automotive and aerospace. It is a medium-carbon steel that is composed of a variety of alloying elements, and it is usually supplied untreated but can be heat treated to achieve the desired properties. It can be machined using a variety of processes, such as turning, milling, grinding, and drilling. With proper planning and preparation, ASTM A675/A675M Grade 45 can be machined to a high level of accuracy and precision.
Smelting temperature:1743°C - 1156°C
Application:Mechanical properties of special hot rolled carbon steel rods
ASTM A675/A675M Grade 45 Material Chemical Composition
The chemical composition of the ASTM A675/A675M Grade 45 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0100 |
| PhOsphorus (P) | - | 0.0200 |
| Nickel (Ni) | - | 0.5000 |
| Manganese (Mn) | 0.2500 | 1.0000 |
| Copper (Cu) | - | 0.2500 |
| Chromium (Cr) | 12.0000 | 14.0000 |
| Carbon (C) | 0.1500 | 0.2200 |
ASTM A675/A675M Grade 45 Material Mechanical Properties
The mechanical properties of the ASTM A675/A675M Grade 45 steel are as follows:
| YieldRp0.2 | ≤ 389 (MPa) |
| TeileRm | ≤ 939 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 423 |
ASTM A675/A675M Grade 45 Material Thermal Properties
The thermal performance parameters of the ASTM A675/A675M Grade 45 steel are as follows:
| Temperature (°C) | 12 | 289 | 697 |
| Modulus of elasticity (GPa) | - | 729 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 21 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 222 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 141 |
| Poisson’s coefficient, ν | - | - | 321 |