Grey Cast Iron SAE J431 Grade G2500a (UNS F10009)
SAE J431 Grade G2500a is a grey cast iron alloy primarily used in automotive and mechanical applications. It offers excellent wear resistance, high strength, and good machinability, making it suitable for components subjected to friction and moderate stress.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | —— | Remainder |
| Carbon | 3.4% | —— |
| Manganese | 0.6% | 0.9% |
| Phosphorus | —— | 0.15% |
| Silicon | 1.6% | 2.1% |
| Sulfur | —— | 0.12% |
The following table provides a list of J431 Grade G2500a properties in both SI and US customary/Imperial units.
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| Physical Properties | Metric |
|---|---|
| Density | 7150 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | ≥ 173 MPa |
| Brinell Hardness | 170 - 229 |
| Knoop Hardness Converted from Brinell | 222 |
| Vickers Hardness Converted from Brinell | 209 |
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 J431 Grade G2500a
| Advantages | Disadvantages |
|---|---|
| High tensile strength | Brittle and prone to cracking |
| Good wear resistance | Not suitable for high-stress applications |
| Good machinability | Poor ductility |
| Good thermal conductivity | |
| Cost-effective |
Applications of Iron J431 Grade G2500a
SAE J431 Grade G2500a is widely used in automotive and mechanical components that require strength, durability, and wear resistance, including:
- Brake drums: Brake drums are used to slow down or stop a vehicle by converting the kinetic energy of the vehicle into heat. It is a good choice for brake drums because it is strong and wear-resistant.
- Clutch plates: Clutch plates are used to transfer power from the engine to the wheels. It is a good choice for clutch plates because it is strong and wear-resistant.
- Crankshafts: Crankshafts are used to convert the reciprocating motion of the pistons into rotary motion. It is a good choice for crankshafts because it is strong and machinable.
- Gears: Gears are used to transmit power from one shaft to another. It is a good choice for gears because it is strong and wear-resistant.
- Pistons: Pistons are used to convert the pressure of the combustion gases into linear motion. It is a good choice for pistons because it is strong and machinable.
- Wheels: Wheels are used to support the weight of the vehicle and to transfer the power from the engine to the road. It is a good choice for wheels because it is strong and machinable.