C15E vs C35E: 64% composition overlap. Moderate differences, generally not direct substitutes.
C15E vs C35E
Side-by-side chemical composition and mechanical property comparison.
Overview
C15E
1.1141
Low-carbon unalloyed case hardening steel — 0.12-0.18% C. Between C10E (softer core) and C22E (harder core) in the case-hardening range. Good balance of surface hardness (HRC 58-62) and core toughness after carburizing. Modern designation for Ck15. Used for small gears, pins, bushings, levers, and carburized parts where moderate core strength is acceptable. Also used for cold forming and deep drawing.
C35E
1.1181
Mid-carbon unalloyed Q&T steel — 0.32-0.39% C. Good balance between strength and toughness/weldability. Modern designation for Ck35. Used for moderately loaded shafts, axles, bolts, connecting rods, and machine parts where C45 would be too hard and C22E too soft. Also suitable for surface hardening (flame/induction) to HRC 50-55.
| C15E | C35E | |
|---|---|---|
| Material Number | 1.1141 | 1.1181 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10084 | EN 10083-2 |
Chemical composition (wt%)
| Element | C15E | C35E | Overlap |
|---|---|---|---|
| C | 0.12–0.18% | 0.32–0.39% | No overlap |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 0.3–0.6% | 0.5–0.8% | Partial |
| P | 0–0.025% | 0–0.025% | OK |
Mechanical properties
| Property | C15E | C35E | Unit |
|---|---|---|---|
| tensile_strength | 350–490 | 630–780 | MPa |
| yield_strength | 210–260 | 370–460 | MPa |
| elongation | 25–32 | 17–22 | % |
Compatibility Assessment
C15E and C35E have moderate differences (64% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is C15E the same as C35E?
C15E and C35E have a 64% composition overlap. They are generally not directly interchangeable.
Can I replace C15E with C35E?
Generally not recommended. The compositions differ significantly (64% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between C15E and C35E?
The main differences are in the following elements: C, Mn. C15E is a Carbon Steel grade, while C35E 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.