11SMnPb30 vs C75: 5% composition overlap. Significantly different materials serving different application areas.
11SMnPb30 vs C75
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.
C75
1.0605
High-carbon unalloyed spring steel. Near-eutectoid composition (0.70-0.80% C). Excellent elastic properties after hardening and tempering. Limited hardenability — effective oil quench diameter ≤12mm. Cost-effective for small/medium springs. Used for spring wire, clock springs, saw blades, retaining rings, and precision strip springs. ≈ AISI 1075.
| 11SMnPb30 | C75 | |
|---|---|---|
| Material Number | 1.0718 | 1.0605 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10087 | EN 10132-4 |
Chemical composition (wt%)
| Element | 11SMnPb30 | C75 | Overlap |
|---|---|---|---|
| C | 0–0.14% | 0.7–0.8% | No overlap |
| Si | 0–0.05% | 0.15–0.35% | No overlap |
| Mn | 0.9–1.3% | 0.6–0.9% | Partial |
| P | 0–0.11% | 0–0.025% | OK |
Mechanical properties
| Property | 11SMnPb30 | C75 | Unit |
|---|---|---|---|
| tensile_strength | 460–710 | 850–1100 | MPa |
| yield_strength | ≥ 375 | 500–700 | MPa |
| elongation | ≥ 8 | 8–12 | % |
Compatibility Assessment
11SMnPb30 and C75 have significantly different compositions (5% 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 C75?
11SMnPb30 and C75 have a 5% composition overlap. They are generally not directly interchangeable.
Can I replace 11SMnPb30 with C75?
Generally not recommended. The compositions differ significantly (5% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 11SMnPb30 and C75?
The main differences are in the following elements: C, Si, Mn, S. 11SMnPb30 is a Carbon Steel grade, while C75 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.