1144
Data verified1144 is a heavily resulfurized, high manganese carbon steel that reaches high strength in the as-drawn condition while machining freely. In North America it is sold under trade names for stress-proof-type shafting applications (trademark names belong to their owners).
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.40–0.48 |
| Mn | 1.35–1.65 |
| P | ≤0.040 |
| S | 0.24–0.33 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Tensile strength | 660–780 MPa (hot rolled, typ.) |
| Yield strength | ≥410 MPa (typ.) |
| Density | 7.85 g/cm³ |
Heat treatment
Often used stress-relieved cold drawn at high as-supplied strength; induction hardening possible.
Equivalent grades
| Standard | Designation |
|---|---|
| aisi | 1144 |
Compare side by side: 1144 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: Shafts, spindles, studs, hydraulic ram parts, high-volume turned components.
Processing: Top-tier machinability; high sulfur makes it unsuitable for welding and severe transverse loading.
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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.