AISI 1018 is a low-carbon steel known for its good machinability, weldability, ductility, and consistent mechanical properties. It is widely used for precision-machined components, shafts, pins, spacers, and general engineering applications.
AISI 1018 is a versatile low-carbon steel commonly used in general manufacturing and precision engineering. Its balanced combination of strength, ductility, machinability, and weldability makes it suitable for components that require reliable performance and ease of fabrication. It is frequently used in the production of shafts, pins, spacers, bushings, fixtures, and general-purpose machine parts.
The material is commonly supplied in cold-finished bar forms, depending on the applicable product specification. Its suitability for machining and fabrication makes it a practical choice for automotive, industrial machinery, and equipment manufacturing applications. ASTM A108 covers cold-finished carbon steel bars, but the exact grade and specification should be confirmed when selecting a material. Typical Applications: Precision components, shafts, pins, spacers, bushings, fixtures, and machine parts.Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.15% | 0.20% |
| Manganese (Mn) | 0.60% | 0.90% |
| Phosphorus (P) | — | 0.040% |
| Sulfur (S) | — | 0.050% |
| Iron (Fe) | 98.81% | 99.26% |
| Property | Value |
|---|---|
| Ultimate Tensile Strength | 440 MPa (63,800 psi) |
| Yield Strength | 370 MPa (53,700 psi) |
| Elongation at Break (in 50 mm) | 15% |
| Reduction of Area | 40% |
| Hardness (Brinell) | 126 HB |
| Hardness (Rockwell B) | 71 HRB |
| Modulus of Elasticity | 205 GPa (29,700 ksi) |
| Poisson's Ratio | 0.29 |
| Machinability Rating | 70% |
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