1055
Data verified1055 is a high-medium carbon steel for parts needing a hard, wear-resistant surface with a resilient core. It overlaps the lower spring range and is common in agricultural and hand-tool applications.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.50–0.60 |
| 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 | 650–780 MPa (normalized, typ.) |
| Density | 7.85 g/cm³ |
Heat treatment
Normalize 840–860 °C; quench 830–850 °C oil; temper 400–550 °C for spring-type duty.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.0535 (C55) |
| aisi | 1055 |
| jis | S55C |
| gb | 55 |
Compare side by side: 1055 vs 1060 · 1055 vs 1050
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Leaf and coil springs (light), scraper and mower blades, hand tools, wear strips.
Processing: Machine normalized or annealed; weld only with high preheat and post-weld treatment.
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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.