AISI 1020 is a low-carbon steel valued for its ductility, weldability, and ease of machining and fabrication. It is commonly used for general-purpose shafts, forgings, brackets, and machinery components.
AISI 1020 is a low-carbon steel suitable for a wide range of general engineering and manufacturing applications. Its relatively low carbon content provides good ductility and weldability, making it useful for components that require forming, machining, and conventional fabrication processes.
It is commonly used in the manufacture of machine parts, pins, shafts, brackets, forgings, and general industrial components. Depending on its condition and processing, AISI 1020 can provide a practical balance of strength, toughness, and fabrication flexibility. The required material form and mechanical properties should be specified to ensure suitability for the intended application. Typical Applications: Forgings, shafts, brackets, pins, machine parts, and general fabricationFinal chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.
| Element | Symbol | Min (%) | Max (%) | Nominal Target |
|---|---|---|---|---|
| Carbon | C | 0.18% | 0.23% | 0.20% |
| Manganese | Mn | 0.30% | 0.60% | 0.45% |
| Silicon | Si | 0.15% | 0.35% | 0.25% |
| Phosphorus | P | — | 0.040% | Max 0.040% |
| Sulfur | S | — | 0.050% | Max 0.050% |
| Iron | Fe | Balance | Balance | ~99.1% |
| Condition / Thermal State | Tensile Strength (Rm) | Yield Strength (Re) | Elongation (A5) | Hardness (HBW / HRB) |
|---|---|---|---|---|
| As-Rolled / Hot Rolled | 380 – 480 MPa | 210 – 280 MPa | 25% – 35% | 111 – 143 HBW |
| Cold Drawn | 470 – 570 MPa | 390 – 480 MPa | 15% – 20% | 137 – 166 HBW |
| Normalized (900°C) | 420 – 500 MPa | 250 – 320 MPa | 28% – 36% | 121 – 149 HBW |
| Annealed (870°C) | 390 – 450 MPa | 200 – 260 MPa | 30% – 38% | 111 – 131 HBW |
| Carburized Case (Surface) | — | — | — | 58 – 62 HRC |
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