Grey Cast Iron SAE J431 Grade G2500a (UNS F10009)
SAE J431 Grade G2500a is a type of grey cast iron commonly used in automotive applications, particularly for brake drums and clutch plates. It is known for its good strength and wear resistance, making it suitable for moderate service requirements.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | Remainder | |
| Carbon | 3.4% | |
| Manganese | 0.60% | 0.90% |
| 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.
Click on the icon to switch between Metric and Imperial units.
| 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
Some of the applications of SAE J431 Grade G2500a include:
- Brake drums: Brake drums are used to slow down or stop a vehicle by converting the kinetic energy of the vehicle into heat. SAE J431 Grade G2500a 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. SAE J431 Grade G2500a 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. SAE J431 Grade G2500a is a good choice for crankshafts because it is strong and machinable.
- Gears: Gears are used to transmit power from one shaft to another. SAE J431 Grade G2500a 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. SAE J431 Grade G2500a 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. SAE J431 Grade G2500a is a good choice for wheels because it is strong and machinable.