1140
Data under review1140 is the resulfurized free-machining counterpart of 1040, with the same carbon class but sulfur added for chip breaking. It serves screw-machine production of medium-strength parts.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.37–0.44 |
| Mn | 0.70–1.00 |
| P | ≤0.040 |
| S | 0.08–0.13 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Tensile strength | 540–640 MPa (hot rolled, typ.) |
| Density | 7.85 g/cm³ |
Heat treatment
Normalize 850 °C; induction or flame hardening for wear surfaces.
Equivalent grades
| Standard | Designation |
|---|---|
| aisi | 1140 |
Compare side by side: 1140 vs 1040 · 1140 vs 1141
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Turned shafts, bolts, fittings, hydraulic components (non-welded).
Processing: Good machinability; sulfur rules out critical welds and lowers transverse toughness.
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Ask for a quotationVisit NasteelSource: SAE J403 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.