SAE/AISI 1025 Carbon Steel (UNS G102500)
SAE/AISI 1025 is a medium-carbon steel valued for its balanced strength, machinability, and weldability. It exhibits good toughness and formability, making it suitable for general engineering and manufacturing uses such as shafts, fasteners, and structural components.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 99.03% | 99.48% |
| Carbon | 0.22% | 0.28% |
| Manganese | 0.30% | 0.60% |
| Phosphorous | —— | 0.04% |
| Sulfur | —— | 0.05% |
The following table provides a list of SAE/AISI 1025 properties in both SI and US customary/Imperial units.
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| Physical Properties | Metric |
|---|---|
| Density | 7858 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 440 - 500 MPa |
| Tensile Strength (Yield) | 250 - 420 MPa |
| Young’s Modulus (E) | 190 - 210 GPa |
| Bulk Modulus (K) | 140 GPa |
| Shear Modulus (G) | 80 GPa |
| Elongation at Break | 15 - 30% |
| Poisson’s Ratio (ν) | 0.27 - 0.30 |
| Brinell Hardness | 130 |
| Thermal Properties | Metric |
| Thermal Conductivity | 52 W/m·K |
| Specific Heat Capacity (Cp) | 470 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.21×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 4.1×106 S/m |
| Electrical Resistivity | 2.4×10-7 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 1025 Carbon Steel
| Advantages | Disadvantages |
|---|---|
| Cost-effective | Limited hardness |
| Good balance of strength and toughness | Susceptible to corrosion |
| Good machinability | Limited impact resistance |
| Good weldability |
Applications of 1025 Carbon Steel
SAE/AISI 1025 is used across multiple sectors due to its mechanical versatility and cost-effectiveness. Common applications include:
- Automotive Components: Used for manufacturing various automotive components such as shafts, gears, axles, and crankshafts due to its good strength, toughness, and machinability.
- Fasteners: Commonly employed in the production of bolts, studs, nuts, and other fasteners. Its moderate strength and weldability make it suitable for fastening applications.
- Machinery and Equipment: Utilized in the construction of machinery and equipment parts, including machine frames, brackets, couplings, and fittings, thanks to its machinability and moderate strength.
- Construction: Used in structural components like beams, columns, and support structures, where moderate strength and good weldability are desired.
- Shafts and Rotating Equipment: Suitable for manufacturing shafts used in pumps, motors, and other rotating equipment due to its good balance of strength and machinability.
- Agricultural Equipment: Components of agricultural machinery, such as plows, tillers, and harvesters, can be made from this steel due to its strength and cost-effectiveness.
- Tooling and Dies: Occasionally used in the production of tooling and dies, particularly for less demanding applications that don’t require higher alloy or tool steels.