C10E vs C75: 50% composition overlap. Moderate differences, generally not direct substitutes.
C10E vs C75
Side-by-side chemical composition and mechanical property comparison.
Overview
C10E
1.1121
Lowest practical carbon case-hardening steel — 0.07-0.13% C. After carburizing: hard surface (HRC 55-60) with extremely soft, tough core (HRC 15-20). Maximum impact absorption. Modern designation for Ck10. Used for pins, bushings, small gears, camshaft lobes, and any carburized part where maximum core toughness and ductility are critical. Also used as cold-heading and deep-drawing wire/strip.
C75
1.0605
High-carbon unalloyed spring steel. Near-eutectoid composition (0.70-0.80% C). Excellent elastic properties after hardening and tempering. Limited hardenability — effective oil quench diameter ≤12mm. Cost-effective for small/medium springs. Used for spring wire, clock springs, saw blades, retaining rings, and precision strip springs. ≈ AISI 1075.
| C10E | C75 | |
|---|---|---|
| Material Number | 1.1121 | 1.0605 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10084 | EN 10132-4 |
Chemical composition (wt%)
| Element | C10E | C75 | Overlap |
|---|---|---|---|
| C | 0.07–0.13% | 0.7–0.8% | No overlap |
| Si | 0–0.4% | 0.15–0.35% | OK |
| Mn | 0.3–0.6% | 0.6–0.9% | Partial |
| P | 0–0.025% | 0–0.025% | OK |
Mechanical properties
| Property | C10E | C75 | Unit |
|---|---|---|---|
| tensile_strength | 310–440 | 850–1100 | MPa |
| yield_strength | 180–220 | 500–700 | MPa |
| elongation | 28–35 | 8–12 | % |
Compatibility Assessment
C10E and C75 have moderate differences (50% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is C10E the same as C75?
C10E and C75 have a 50% composition overlap. They are generally not directly interchangeable.
Can I replace C10E with C75?
Generally not recommended. The compositions differ significantly (50% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between C10E and C75?
The main differences are in the following elements: C, Mn. C10E is a Carbon Steel grade, while C75 is a Carbon Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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