Grey Cast Iron SAE J431 Grade G4000d (UNS F10012)
SAE J431 Grade G4000d is a gray cast iron alloy valued for its high strength, wear resistance, and versatility. Commonly used in the automotive, industrial, and agricultural sectors, it provides a reliable balance of mechanical performance and castability, making it suitable for demanding structural and mechanical components.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | —— | Remainder |
| Carbon | 3.10% | 3.60% |
| Chromium | 0.85% | 1.25% |
| Manganese | 0.60% | 0.90% |
| Molybdenum | 0.40% | 0.60% |
| Nickel | 0.20% | 0.45% |
| Phosphorus | —— | 0.10% |
| Silicon | 1.95% | 2.40% |
| Sulfur | —— | 0.15% |
The following table provides a list of SAE J431 Grade G4000d 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) | ≥ 276 MPa |
| Brinell Hardness | 241 - 321 |
| Knoop Hardness Converted from Brinell | 314 |
| Vickers Hardness Converted from Brinell | 298 |
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 G4000d
| Advantages | Disadvantages |
|---|---|
| High strength | Brittle |
| Good toughness | Poor machinability |
| Good machinability | Low thermal conductivity |
| Wide range of applications | High cost |
Applications of Iron J431 Grade G4000d
SAE J431 Grade G4000d is utilized across various industries due to its mechanical performance and castability, including:
- Automotive: Engine blocks, cylinder heads, camshafts, crankshafts, connecting rods, and other components.
- Industrial machinery: Gearboxes, bearings, shafts, and other components.
- Agricultural machinery: Tractors, harvesters, and other equipment.
- Machine tools: Dies, molds, and other tooling.
- Mining equipment: Drills, bits, and other tools.
- Construction equipment: Excavators, loaders, and other machines.
- HVAC equipment: Furnaces, boilers, and other components.
- Petroleum and chemical processing equipment: Pumps, valves, and other components.