ASTM A684/A684M 1045 Introduce
ASTM A684/A684M 1045 steel is an alloy of iron, carbon, and other elements. It has excellent chemical properties, including corrosion resistance, high weldability, and good heat treatment properties. It is used in a variety of industries, including construction, automotive, aerospace, and energy.
Smelting temperature:1349°C - 1124°C
Application:Cold rolled high carbon steel strip
ASTM A684/A684M 1045 Material Chemical Composition
The chemical composition of the ASTM A684/A684M 1045 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Carbon (C) | 0.4300 | 0.5000 |
| Manganese (Mn) | 0.6000 | 0.9000 |
| PhOsphorus (P) | - | 0.0300 |
| Sulfur (S) | - | 0.0350 |
| Silicon (Si) | 0.1500 | 0.3000 |
| Nickel (Ni) | - | 0.3000 |
| Chromium (Cr) | - | 0.2500 |
| Molybdenum (Mo) | - | 0.1000 |
| Copper (Cu) | - | 0.3000 |
| (Cr+Ni+Cu+Mo) | - | 0.8000 |
| Silicon (Si) | 0.1500 | 0.3000 |
| Nickel (Ni) | - | 0.3000 |
| Molybdenum (Mo) | - | 0.1000 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | - | 0.2500 |
ASTM A684/A684M 1045 Material Mechanical Properties
One of the major advantages of ASTM A684/A684M 1045 steel is its corrosion resistance. Increased chromium and molybdenum contents make the steel more resistant to corrosion in different environments, including salt water and certain acidic solutions. Chromium forms a protective oxide layer on the surface of the steel, which helps to prevent further corrosion. The nickel content also improves corrosion resistance, making it a great choice for marine applications.
The mechanical properties of the ASTM A684/A684M 1045 steel are as follows:
| YieldRp0.2 | ≤ 786 (MPa) |
| TeileRm | ≤ 197 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 244 |
ASTM A684/A684M 1045 Material Thermal Properties
The thermal performance parameters of the ASTM A684/A684M 1045 steel are as follows:
| Temperature (°C) | 21 | 483 | 656 |
| Modulus of elasticity (GPa) | - | 315 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 211 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 232 |
| Poisson’s coefficient, ν | - | - | 233 |
ASTM A684/A684M 1045 Material Machining Technology
Machining ASTM A684/A684M 1045 steel is a complex process that requires a high degree of skill and safety awareness. The process offers multiple advantages, such as the accuracy, repeatability and cost savings, which make the material suitable for a wide range of industries. Moreover, the machining process can be done using a variety of cutting tools and techniques, such as CNC turning and milling.