9SMnPb28 vs C10E: 21% composition overlap. Significantly different materials serving different application areas.
9SMnPb28 vs C10E
Side-by-side chemical composition and mechanical property comparison.
Overview
9SMnPb28
1.0718
Leaded free-cutting steel — Pb (0.15-0.35%) + S (0.24-0.33%) for maximum machinability. THE ultimate Automatenstahl: machinability rating ~175% (vs 100% for 11SMn30). Pb acts as chip-breaker and tool lubricant. Used for high-speed automatic screw machine production of screws, nuts, fittings, bushings, and any part where surface finish and cycle time matter most. NOTE: Pb content being phased out under EU ELV/RoHS — replacement grades emerging.
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.
| 9SMnPb28 | C10E | |
|---|---|---|
| Material Number | 1.0718 | 1.1121 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10087 | EN 10084 |
Chemical composition (wt%)
| Element | 9SMnPb28 | C10E | Overlap |
|---|---|---|---|
| C | 0–0.14% | 0.07–0.13% | OK |
| Si | — | 0–0.4% | — |
| Mn | 0.9–1.3% | 0.3–0.6% | No overlap |
| P | 0–0.06% | 0–0.025% | OK |
Mechanical properties
| Property | 9SMnPb28 | C10E | Unit |
|---|---|---|---|
| tensile_strength | 370–500 | 310–440 | MPa |
| yield_strength | 230–300 | 180–220 | MPa |
| elongation | 14–22 | 28–35 | % |
Compatibility Assessment
9SMnPb28 and C10E have significantly different compositions (21% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 9SMnPb28 the same as C10E?
9SMnPb28 and C10E have a 21% composition overlap. They are generally not directly interchangeable.
Can I replace 9SMnPb28 with C10E?
Generally not recommended. The compositions differ significantly (21% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 9SMnPb28 and C10E?
The main differences are in the following elements: Mn, S. 9SMnPb28 is a Carbon Steel grade, while C10E 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.