1080
Data verified1080 sits at the eutectoid carbon level: fully pearlitic when normalized and capable of high hardness after quenching. It is a classic spring and blade steel for thicker sections than 1075 handles.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.75–0.88 |
| Mn | 0.60–0.90 |
| P | ≤0.040 |
| S | ≤0.050 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Tensile strength | 800–950 MPa (normalized, typ.) |
| Hardness (spring temper) | 45–52 HRC typical |
| Density | 7.85 g/cm³ |
Heat treatment
Anneal 790–820 °C; quench 800–830 °C oil; temper 330–450 °C.
Equivalent grades
| Standard | Designation |
|---|---|
| din | C80 type (near) |
| aisi | 1080 |
| jis | SK5 family (near) |
| gb | 80 |
Compare side by side: 1080 vs 1084 · 1080 vs 1075
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Heavy springs, plough and cultivator parts, blades, torsion bars, high-carbon wire.
Processing: Anneal for machining; toughness drops fast above ~50 HRC — temper selection is critical.
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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.