1084
Data verified1084 is a eutectoid-plus high carbon steel popular for blades and springs because its simple chemistry heat treats forgivingly in small workshops. The manganese level gives slightly deeper hardening than 1095.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.80–0.93 |
| 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 | 820–980 MPa (normalized, typ.) |
| Hardness (hardened) | 58–63 HRC (thin sections) |
| Density | 7.85 g/cm³ |
Heat treatment
Anneal 790–815 °C; quench 800–830 °C oil; temper 200–400 °C by duty.
Equivalent grades
| Standard | Designation |
|---|---|
| din | C85 type (near) |
| aisi | 1084 |
| jis | SK5 family (near) |
| gb | 85 (near) |
Compare side by side: 1084 vs 1095 · 1084 vs 1080
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Knives and blades, springs, scrapers, agricultural cutting parts.
Processing: Forge and machine annealed; simple oil quench practice; avoid overheating to limit grain growth.
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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.