1065
Data verified1065 is a high carbon spring-range steel, close in carbon to GB 65 steel but with the lower manganese of the SAE series. It is used for springs, blades and wear parts in thin to medium sections.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.60–0.70 |
| 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 | 700–850 MPa (normalized, typ.) |
| Density | 7.85 g/cm³ |
Heat treatment
Normalize 840 °C; quench 820–840 °C oil; temper 380–500 °C for spring temper.
Equivalent grades
| Standard | Designation |
|---|---|
| din | C65 type (near) |
| aisi | 1065 |
| gb | 65 |
Compare side by side: 1065 vs 65Mn · 1065 vs 1060
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Springs, saw blades, scraper blades, clutch plates, wear parts.
Processing: Anneal before machining; through-hardens in thin sections; avoid welding where possible.
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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.