11SMnPb30 vs C15E: 9% composition overlap. Significantly different materials serving different application areas.
11SMnPb30 vs C15E
Side-by-side chemical composition and mechanical property comparison.
Overview
11SMnPb30
1.0718
Leaded free-cutting steel — the highest machinability rating among carbon steels. Pb+S combination gives excellent chip breaking and surface finish. The standard grade for high-volume automatic lathe parts. Used for screws, nuts, bolts, bushings, pins, and automotive turned parts. ≈ AISI 12L14.
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.
| 11SMnPb30 | C15E | |
|---|---|---|
| Material Number | 1.0718 | 1.1141 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10087 | EN 10084 |
Chemical composition (wt%)
| Element | 11SMnPb30 | C15E | Overlap |
|---|---|---|---|
| C | 0–0.14% | 0.12–0.18% | Partial |
| Si | 0–0.05% | 0–0.4% | OK |
| Mn | 0.9–1.3% | 0.3–0.6% | No overlap |
| P | 0–0.11% | 0–0.025% | OK |
Mechanical properties
| Property | 11SMnPb30 | C15E | Unit |
|---|---|---|---|
| tensile_strength | 460–710 | 350–490 | MPa |
| yield_strength | ≥ 375 | 210–260 | MPa |
| elongation | ≥ 8 | 25–32 | % |
Compatibility Assessment
11SMnPb30 and C15E have significantly different compositions (9% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 11SMnPb30 the same as C15E?
11SMnPb30 and C15E have a 9% composition overlap. They are generally not directly interchangeable.
Can I replace 11SMnPb30 with C15E?
Generally not recommended. The compositions differ significantly (9% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 11SMnPb30 and C15E?
The main differences are in the following elements: C, Mn, S. 11SMnPb30 is a Carbon Steel grade, while C15E is a Carbon Steel grade.
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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.