11SMnPb30 vs 9SMnPb28: 79% composition overlap. Some similarities but notable differences in alloying elements.
11SMnPb30 vs 9SMnPb28
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.
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.
| 11SMnPb30 | 9SMnPb28 | |
|---|---|---|
| Material Number | 1.0718 | 1.0718 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10087 | EN 10087 |
Chemical composition (wt%)
| Element | 11SMnPb30 | 9SMnPb28 | Overlap |
|---|---|---|---|
| C | 0–0.14% | 0–0.14% | OK |
| Si | 0–0.05% | — | — |
| Mn | 0.9–1.3% | 0.9–1.3% | OK |
| P | 0–0.11% | 0–0.06% | OK |
Mechanical properties
| Property | 11SMnPb30 | 9SMnPb28 | Unit |
|---|---|---|---|
| tensile_strength | 460–710 | 370–500 | MPa |
| yield_strength | ≥ 375 | 230–300 | MPa |
| elongation | ≥ 8 | 14–22 | % |
Compatibility Assessment
11SMnPb30 and 9SMnPb28 share some characteristics (79% overlap) but have notable differences. They may be substitutable in some applications but not all. Verify suitability carefully.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 11SMnPb30 the same as 9SMnPb28?
11SMnPb30 and 9SMnPb28 have a 79% composition overlap. For most purposes, they can be considered similar.
Can I replace 11SMnPb30 with 9SMnPb28?
In many cases, yes. The compositions overlap significantly (79%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between 11SMnPb30 and 9SMnPb28?
The main differences are in the following elements: overall alloying content. 11SMnPb30 is a Carbon Steel grade, while 9SMnPb28 is a Carbon Steel grade.
Related Comparisons
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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.