C10E vs C75S: 50% composition overlap. Moderate differences, generally not direct substitutes.
C10E vs C75S
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.
C75S
1.1248
High-carbon spring strip steel — C 0.70-0.80%. Between C67S (0.65-0.72%) and C85S (0.83-0.90%). Good fatigue strength and edge retention. Used for flat springs, leaf springs, saw blades, snap rings, and reed valves. Available as cold-rolled precision strip in hardened & tempered condition (HRC 58-62).
| C10E | C75S | |
|---|---|---|
| Material Number | 1.1121 | 1.1248 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10084 | EN 10132-4 |
Chemical composition (wt%)
| Element | C10E | C75S | 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 | C75S | Unit |
|---|---|---|---|
| tensile_strength | 310–440 | 1250–1500 | MPa |
| yield_strength | 180–220 | 1100–1350 | MPa |
| elongation | 28–35 | 4–7 | % |
Compatibility Assessment
C10E and C75S 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 C75S?
C10E and C75S have a 50% composition overlap. They are generally not directly interchangeable.
Can I replace C10E with C75S?
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 C75S?
The main differences are in the following elements: C, Mn. C10E is a Carbon Steel grade, while C75S is a Carbon Steel grade.
View full data for each material:
Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.