SAE/AISI 1215 Carbon Steel (UNS G12150)
SAE/AISI 1215 is a resulfurized, low-carbon steel alloy engineered for exceptional machinability, making it ideal for high-speed manufacturing processes. Its fine surface finish, cost-effectiveness, and ease of machining make it a popular choice for precision components in the automotive, tooling, and electronics industries.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 98.42% | 98.95% |
| Carbon | —— | 0.09% |
| Manganese | 0.75% | 1.05% |
| Phosphorous | 0.04% | 0.09% |
| Sulfur | 0.26% | 0.35% |
The following table provides a list of SAE/AISI 1215 properties in both SI and US customary/Imperial units.
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| Physical Properties | Metric |
|---|---|
| Density | 7870 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 540 MPa |
| Tensile Strength (Yield) | 415 MPa |
| Young’s Modulus (E) | 190 - 210 GPa |
| Bulk Modulus (K) | 140 GPa |
| Shear Modulus (G) | 80 GPa |
| Elongation at Break | 10% |
| Reduction of Area | 35% |
| Poisson’s Ratio (ν) | 0.27 - 0.30 |
| Brinell Hardness | 167 |
| Thermal Properties | Metric |
| Thermal Conductivity | 52 W/m·K |
| Specific Heat Capacity (Cp) | 470 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.15×10-5 1/°C |
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 1215 Carbon Steel
| Advantages | Disadvantages |
|---|---|
| Excellent machinability | Lower strength compared to some other carbon steels |
| Improved chip formation during machining | Reduced ductility compared to some other carbon steels |
| Cost-effective for high-volume production | Reduced impact resistance compared to some other carbon steels |
| Good surface finish | Limited wear resistance compared to some other carbon steels |
Applications of 1215 Carbon Steel
AISI 1215 carbon steel finds applications in various industries and is particularly suited for parts and components that require excellent machinability. Key applications inlcude:
- Machined Components: Due to its exceptional machinability, it is widely used for producing machined components such as bushings, couplings, fittings, studs, bolts, nuts, and hydraulic fittings.
- Fasteners: Often employed in the production of fasteners such as screws, studs, and bolts.
- Precision Shafts: The excellent machinability and good surface finish make it suitable for manufacturing precision shafts used in applications like motors, pumps, and machinery.
- Automotive Components: Certain automotive components benefit from its machinability and cost-effectiveness. Examples include bushings, fittings, spacers, and other small parts used in engines, transmissions, and braking systems.
- Electrical and Electronic Equipment: Found in electrical and electronic equipment, particularly in parts that require machining, such as connectors, terminals, and contacts.
- Hardware and Tooling: Its machinability makes it useful in the production of hardware items, hand tools, and tooling components that require precise machining and dimensional accuracy.