Grey Cast Iron SAE J431 Grade G4000 (UNS F10008)
SAE J431 Grade G4000 is a type of gray cast iron that is used in a variety of automotive applications, including diesel engine castings, liners, cylinders, and pistons.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | Remainder | |
| Carbon | 3.0% | 3.3% |
| Manganese | 0.70% | 1.0% |
| Phosphorus | 0.10% | |
| Silicon | 1.8% | 2.1% |
| Sulfur | 0.15% | |
The following table provides a list of SAE J431 Grade G4000 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 7150 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | ≥ 276 MPa |
| Brinell Hardness | 217 - 269 |
| Knoop Hardness Converted from Brinell | 271 |
| Vickers Hardness Converted from Brinell | 256 |
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 Iron SAE J431 Grade G4000
| Advantages | Disadvantages |
|---|---|
| High tensile strength | Brittle material |
| Good machinability | Limited ductility |
| Wear resistance | Poor corrosion resistance |
| Good castability |
Applications of Iron SAE J431 Grade G4000
Iron SAE J431 Grade G4000, being a type of gray iron with specific mechanical properties, is commonly used in various automotive applications. Some of the typical applications of Iron SAE J431 Grade G4000 include:
- Brake Components: Grade G4000 iron is often used in the production of brake components such as brake drums and brake rotors. The high tensile strength and wear resistance of G4000 make it suitable for enduring the friction and heat generated during braking.
- Engine Blocks: The good machinability and thermal conductivity of G4000 iron make it a suitable material for engine blocks. It helps in efficient heat dissipation and provides structural integrity to support the engine's operation.
- Transmission Components: G4000 iron can be used in the manufacturing of transmission components such as housings and gears. Its high tensile strength and good castability make it suitable for these applications.
- Suspension Parts: Components like suspension arms, brackets, and steering knuckles can be made from Grade G4000 iron. Its strength and wear resistance contribute to the durability and performance of these parts.
- Powertrain Components: Certain powertrain components like flywheels and crankshafts can utilize Grade G4000 iron. The material's properties enable it to handle the mechanical stresses and high torque requirements of powertrain systems.
- Machinery and Equipment: Beyond automotive applications, Grade G4000 iron can find use in various machinery and equipment components where strength, wear resistance, and castability are required.