SAE/AISI 4037 Alloy Steel (UNS G40370)
SAE/AISI 4037 steel is commonly used in various applications that require high strength and toughness, such as gears, shafts, axles, and other components in automotive and machinery industries.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 97.98% | 98.60% |
| Carbon | 0.35% | 0.40% |
| Manganese | 0.70% | 0.90% |
| Molybdenum | 0.20% | 0.30% |
| Phosphorous | 0.035% | |
| Silicon | 0.15% | 0.35% |
| Sulfur | 0.04% | |
The following table provides a list of SAE/AISI 4037 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 7850 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 190 - 210 GPa |
| Bulk Modulus (K) | 140 GPa |
| Shear Modulus (G) | 80 GPa |
| Poisson’s Ratio (ν) | 0.27 - 0.30 |
| Brinell Hardness | 196 |
| Thermal Properties | Metric |
| Thermal Conductivity | 48 W/m·K |
| Specific Heat Capacity (Cp) | 470 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.3×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 4.12×106 S/m |
| Electrical Resistivity | 2.43×10-7 Ω·m |
The values in this table are approximate and can vary depending on various factors such as the specific manufacturing process and heat treatment applied to the alloy.
Advantages & Disadvantages of 4037 Alloy Steel
| Advantages | Disadvantages |
|---|---|
| High strength and toughness | Limited corrosion resistance |
| Good wear resistance | Relatively low hardenability |
| Excellent fatigue resistance | Susceptible to cracking during welding |
| Good machinability | Limited availability in certain regions |
| Cost-effective compared to some high-alloy steels | Requires proper heat treatment for optimal properties |
Applications of 4037 Alloy Steel
AISI 4037 steel finds applications in various industries due to its desirable properties. Here are some common applications of 4037 steel:
- Gears and Shafts: The high strength, toughness, and wear resistance of 4037 steel make it suitable for use in gears, shafts, and other power transmission components.
- Automotive Parts: 4037 steel is used in the manufacturing of automotive components such as axles, crankshafts, and connecting rods. Its combination of strength and toughness ensures reliable performance under demanding conditions.
- Machine Parts: Due to its good machinability, 4037 steel is employed in the production of various machine parts. These include bolts, nuts, studs, and other fasteners that require strength and durability.
- Springs: 4037 steel can be utilized in the fabrication of springs, including coil springs and leaf springs. Its excellent fatigue resistance makes it suitable for applications where repeated loading and unloading occur.
- Tooling and Die Making: The wear resistance and toughness of 4037 steel make it suitable for tooling and die making. It can be used for manufacturing cutting tools, dies, punches, and other components that require resistance to wear and deformation.
- Construction Machinery: Components used in construction machinery, such as crane hooks, pins, and bushings, can be made from 4037 steel. Its strength and toughness allow these parts to withstand heavy loads and harsh working conditions.
- Railroad Components: 4037 steel is employed in the production of railroad components like axles, wheel sets, and couplings. Its mechanical properties ensure reliable performance and durability in the demanding railway environment.