SAE/AISI 1018 Carbon Steel (UNS UNSNUMBER)
SAE/AISI 1018 steel is known for its good machinability, weldability, and formability. It s often used in a wide range of applications such as gears, studs, bolts, couplings, axles, and machinery parts.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 98.81% | 99.26% |
| Carbon | 0.14% | 0.20% |
| Manganese | 0.60% | 0.90% |
| Phosphorous | 0.04% | |
| Sulfur | 0.05% | |
The following table provides a list of SAE/AISI 1018 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 7870 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 440 MPa |
| Tensile Strength (Yield) | 370 MPa |
| Young’s Modulus (E) | 200 GPa |
| Bulk Modulus (K) | 140 GPa |
| Shear Modulus (G) | 80 GPa |
| Elongation at Break | 15% |
| Poisson’s Ratio (ν) | 0.29 |
| Brinell Hardness | 126 |
| Thermal Properties | Metric |
| Thermal Conductivity | 52 W/m·K |
| Specific Heat Capacity (Cp) | 486 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.2×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 4.64×106 S/m |
| Electrical Resistivity | 2.19×10-7 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 1018 Carbon Steel
| Advantages | Disadvantages |
|---|---|
| Cost-Effective | Lower strength |
| Excellent Machinability | Susceptible to Corrosion |
| Good Weldability | Limited Impact Resistance |
Applications of 1018 Carbon Steel
1018 carbon steel finds application in various industries and sectors due to its favorable properties and cost-effectiveness. Here are some common applications of 1018 carbon steel:
- General Purpose Machinery: 1018 carbon steel is frequently used in the manufacturing of general-purpose machinery and equipment. Its good machinability and weldability make it suitable for producing components such as gears, shafts, bolts, nuts, studs, and couplings.
- Automotive Parts: The automotive industry relies on 1018 carbon steel for the production of numerous components. It is used in applications such as axles, crankshafts, connecting rods, steering components, and various brackets. Its machinability and moderate strength make it a preferred choice for these parts.
- Construction: 1018 carbon steel is used in the construction industry for a range of applications. It is commonly employed in the fabrication of structural components like beams, columns, and angles. Its cost-effectiveness and ease of fabrication make it suitable for various construction projects.
- Tools and Dies: Due to its good machinability and moderate hardness, 1018 carbon steel is utilized in the production of hand tools, cutting tools, dies, and molds. It can be shaped and hardened through heat treatment to withstand the demands of tooling applications.
- Fasteners: 1018 carbon steel is often employed in the manufacturing of fasteners such as screws, bolts, and rivets. Its moderate strength and weldability allow for reliable and secure fastening in a variety of assemblies and structures.
- Shafts and Pins: The mechanical properties of 1018 carbon steel make it suitable for the production of shafts and pins in machinery and equipment. These components are commonly found in power transmission systems, conveyor systems, and mechanical assemblies.
- Agricultural Equipment: In the agricultural sector, 1018 carbon steel is used for the fabrication of farm equipment such as plows, cultivators, and tractor components. Its cost-effectiveness and machinability make it a practical choice for these applications.
- Furniture and Decorative Items: 1018 carbon steel is sometimes utilized in the manufacture of furniture frames, decorative items, and ornamental structures. Its workability allows for the creation of intricate designs, while its affordability makes it a popular option.