9SMnPb28 vs ASTM A588 (Corten): 53% composition overlap. Moderate differences, generally not direct substitutes.
9SMnPb28 vs ASTM A588 (Corten)
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.
ASTM A588 (Corten)
High-strength low-alloy weathering steel. Forms a stable protective rust patina eliminating the need for paint. Cu-Cr-Ni-V composition provides 4-8x atmospheric corrosion resistance vs carbon steel. Used for unpainted bridges, architectural facades, sculptures, outdoor structures, and freight cars.
| 9SMnPb28 | ASTM A588 (Corten) | |
|---|---|---|
| Material Number | 1.0718 | — |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10087 | ASTM A588 |
Chemical composition (wt%)
| Element | 9SMnPb28 | ASTM A588 (Corten) | Overlap |
|---|---|---|---|
| C | 0–0.14% | 0–0.19% | OK |
| Si | — | 0.3–0.65% | — |
| Mn | 0.9–1.3% | 0.8–1.25% | Partial |
| P | 0–0.06% | 0–0.04% | OK |
Mechanical properties
| Property | 9SMnPb28 | ASTM A588 (Corten) | Unit |
|---|---|---|---|
| tensile_strength | 370–500 | ≥ 485 | MPa |
| yield_strength | 230–300 | ≥ 345 | MPa |
| elongation | 14–22 | ≥ 18 | % |
Compatibility Assessment
9SMnPb28 and ASTM A588 (Corten) have moderate differences (53% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 9SMnPb28 the same as ASTM A588 (Corten)?
9SMnPb28 and ASTM A588 (Corten) have a 53% composition overlap. They are generally not directly interchangeable.
Can I replace 9SMnPb28 with ASTM A588 (Corten)?
Generally not recommended. The compositions differ significantly (53% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 9SMnPb28 and ASTM A588 (Corten)?
The main differences are in the following elements: Mn, S. 9SMnPb28 is a Carbon Steel grade, while ASTM A588 (Corten) 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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