1.0737 (11SMnPb37)
Data verified11SMnPb37 (1.0737) pushes the EN leaded free-cutting concept furthest: sulfur raised to 0.34–0.40% and manganese to 1.00–1.50% on top of the standard lead addition, for maximum chip-breaking and cutting speed on the most demanding automatic-lathe work.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.14 |
| Si | ≤0.05 |
| Mn | 1.00–1.50 |
| P | ≤0.11 |
| S | 0.34–0.40 |
| Pb | 0.20–0.35 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Tensile strength | 390–530 MPa (delivery-condition dependent) |
| Machinability | Outstanding (highest-sulfur EN leaded grade) |
| Density | 7.85 g/cm³ |
Heat treatment
Used as-rolled or cold drawn; no hardening response.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.0737 (11SMnPb37) |
| aisi | 12L14 (near) |
Compare side by side: 1.0737 (11SMnPb37) vs 12L14 · 1.0737 (11SMnPb37) vs 1.0718 (11SMnPb30)
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Complex, high-output turned parts where cycle time dominates cost; fittings, connectors and precision small components.
Processing: The highest machinability of the EN free-cutting family, with correspondingly poor weldability and the usual lead restrictions; surface quality in cold-drawn execution is excellent.
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Ask for a quotationVisit NasteelSource: EN 10087 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.