Steel 11SMnPb30
EN 11SMnPb30
11SMnPb30 (1.0737, EN 10087) is a resulfurized and leaded free-cutting carbon steel, the European counterpart to AISI 12L14; lead globules together with MnS inclusions give it a machinability rating of 88.
Values for the HR condition
11SMnPb30 tempers and conditions
11SMnPb30 is supplied in 5 conditions, soft to hard. HR is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
soft/subcritical annealed bar | Use when maximum ductility for cold heading, staking or riveting is required, accepting lower strength. | 240 | 420 | 25 | 120 HB | — |
HRDefault Hot rolled | Cheapest bar form for large diameters or when parts are fully machined from oversize stock. | 260 | 480 | 22 | 135 HB | — |
Cold rolled | Use for cold-rolled flats, squares and hexagons where a smooth as-rolled surface and tight thickness are wanted. | 410 | 540 | 9 | 165 HB | 9.5 % IACS |
Cold drawn | Default stock condition: close tolerance h9/h11 bright bar for automatic-lathe / CNC turning of small parts. | 420 | 560 | 8 | 170 HB | — |
Cold drawn to higher strength | Pick when higher yield strength / straightness is needed for slender turned or ground shafts. | 550 | 660 | 6 | 14 HRC | 9.2 % IACS |
Supply forms, finishes and certifications
Ways 11SMnPb30 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Peeled | Peeled/turned bar | Coating |
What is 11SMnPb30?
11SMnPb30 (1.0737, EN 10087) is a resulfurized and leaded free-cutting carbon steel, the European counterpart to AISI 12L14; lead globules together with MnS inclusions give it a machinability rating of 88. It is the default bar for high-volume turned parts on automatic and Swiss lathes, stocked hot-rolled, cold-rolled, cold-drawn, annealed, peeled and in special hardness. Strength is low (260 MPa yield, 480 MPa tensile, 135 HB), it is not weldable, forms poorly and has no corrosion resistance. Where lead is not permitted, 11SMn30 is the direct substitute. 11SMnPb30 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F). 11SMnPb30 has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 92% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
What is 11SMnPb30 used for?
- Screw machine parts
- Hydraulic and pneumatic fittings
- Threaded inserts and nuts
- Bushings and spacers
- Connector shells
- Low-pressure valve stems
Advantages
- Easy to machine — 88/100, better than 99% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades
- High electrical conductivity — 9.5 % IACS, better than 75% of steel grades
Limitations
- Difficult to weld — 12/100, worse than 96% of steel grades
- Low strength — 260 MPa (37.7 ksi), worse than 92% of steel grades
- Limited service temperature — 250°C (482 °F), worse than 85% of steel grades
11SMnPb30 properties
Typical room-temperature values for 11SMnPb30-HR; bars are the position among steel grades.
Physical3
11SMnPb30 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical14
11SMnPb30 has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 92% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
11SMnPb30 is rated for continuous service to 250°C (482 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
11SMnPb30 conducts electricity at 9.5 % IACS, better than 75% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of 11SMnPb30 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 35%.
Manufacturability7
11SMnPb30's machinability is excellent (88/100, better than 99% of steel grades); weldability not recommended (12/100); formability fair (35/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. 11SMnPb30 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 11SMnPb30
Is 11SMnPb30 easy to machine?
Outstanding: high speeds with HSS or carbide, short broken chips, excellent surface and long tool life — the benchmark free-cutting steel for automatic lathes.
Can 11SMnPb30 be welded?
Not recommended — high sulphur and lead cause hot cracking and porosity; if unavoidable, use low-hydrogen filler, preheat and fume extraction for Pb.
Can 11SMnPb30 be formed, bent or molded?
Poor cold formability and bendability due to MnS/Pb inclusions; only light cold heading or staking in the annealed condition, hot forming above ~1150 °C with care.
Manufacturability
The process limits FabDigit applies to 11SMnPb30. Every 11SMnPb30 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Excellent88 / 100 |
|---|---|
| ISO material group | P.1 |
| Cutting speed (rough / finish) | 220 / 260 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 5× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
11SMnPb30 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| CEN 10087 max | ≤ 0.14 | 0.1 |
| Silow Si to keep chips brittle | ≤ 0.05 | 0.03 |
| Mn | 0.9 – 1.3 | 1.1 |
| P | ≤ 0.11 | 0.06 |
| SMnS inclusions for chip breaking | 0.27 – 0.33 | 0.3 |
| Pbfree-machining additive | 0.2 – 0.35 | 0.27 |
| Fe | balance |
What surface finishes work on 11SMnPb30?
No anodizing; protect by zinc or Zn-Ni electroplating, phosphating, black oxide or oiling. Case-carbonitriding or salt-bath nitrocarburising can be applied for wear surfaces.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Plating
CVD Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 11SMnPb30 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.07181.073710087
- Similar grades
- 12L14
How much does 11SMnPb30 cost?
11SMnPb30 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
11SMnPb30 — frequently asked
What is 11SMnPb30 used for?
11SMnPb30 is typically used for screw machine parts, hydraulic and pneumatic fittings, threaded inserts and nuts, bushings and spacers, connector shells and low-pressure valve stems. In short: leaded free-machining bar.
What is the yield strength of 11SMnPb30?
11SMnPb30 has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 92% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 11SMnPb30 easy to machine?
Yes — machinability is rated excellent (88/100, better than 99% of steel grades). Outstanding: high speeds with HSS or carbide, short broken chips, excellent surface and long tool life — the benchmark free-cutting steel for automatic lathes.
Can 11SMnPb30 be welded?
Not readily — weldability is rated not recommended (12/100). Not recommended — high sulphur and lead cause hot cracking and porosity; if unavoidable, use low-hydrogen filler, preheat and fume extraction for Pb.
What surface finishes work on 11SMnPb30?
No anodizing; protect by zinc or Zn-Ni electroplating, phosphating, black oxide or oiling. Case-carbonitriding or salt-bath nitrocarburising can be applied for wear surfaces.
Can 11SMnPb30 be formed, bent or molded?
Poor cold formability and bendability due to MnS/Pb inclusions; only light cold heading or staking in the annealed condition, hot forming above ~1150 °C with care.
What is the maximum service temperature of 11SMnPb30?
11SMnPb30 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 11SMnPb30-HR and 11SMnPb30-SH?
HR is the default condition — cheapest bar form for large diameters or when parts are fully machined from oversize stock. SH: pick when higher yield strength / straightness is needed for slender turned or ground shafts. Yield strength is 260 MPa in HR versus 550 MPa in SH.
How much does 11SMnPb30 cost?
11SMnPb30 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in 11SMnPb30?
Yes — 11SMnPb30 is available for CNC machining; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- EN 10087 — Free-cutting steels: technical delivery conditions — CEN (1998)
- EN 10277-3 — Bright steel products: free-cutting steels — CEN (2008)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ASM Handbook Vol.16 — Machining (machinability ratings) — ASM International (1989)
- Bright bar 1.0718 free-cutting steel data — European bright bar producers (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.