C15E vs S275JR: 52% composition overlap. Moderate differences, generally not direct substitutes.
C15E vs S275JR
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.
S275JR
1.0044
Medium-strength structural steel with minimum yield strength of 275 MPa. Bridges the gap between S235JR and S355JR. Used for general structural applications, lattice towers, masts, and light crane components. Impact tested at +20°C (JR).
| C15E | S275JR | |
|---|---|---|
| Material Number | 1.1141 | 1.0044 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10084 | EN 10025-2 |
Chemical composition (wt%)
| Element | C15E | S275JR | Overlap |
|---|---|---|---|
| C | 0.12–0.18% | 0–0.21% | OK |
| Si | 0–0.4% | 0–0.6% | OK |
| Mn | 0.3–0.6% | 0–1.5% | OK |
| P | 0–0.025% | 0–0.035% | OK |
Mechanical properties
| Property | C15E | S275JR | Unit |
|---|---|---|---|
| tensile_strength | 350–490 | 410–560 | MPa |
| yield_strength | 210–260 | ≥ 275 | MPa |
| elongation | 25–32 | ≥ 23 | % |
Compatibility Assessment
C15E and S275JR have moderate differences (52% 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 S275JR?
C15E and S275JR have a 52% composition overlap. They are generally not directly interchangeable.
Can I replace C15E with S275JR?
Generally not recommended. The compositions differ significantly (52% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between C15E and S275JR?
The main differences are in the following elements: overall alloying content. C15E is a Carbon Steel grade, while S275JR 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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