Steel 11SMn30
EN 11SMn30
11SMn30 is a resulfurized, non-leaded free-cutting carbon steel to EN 10087 (1.0736) with roughly 0.3 % sulfur forming manganese-sulfide inclusions; the closest US grade is AISI 1215.
Values for the HR condition
11SMn30 tempers and conditions
11SMn30 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 annealed (+A) | Choose when maximum ductility for secondary forming or minimum residual stress before precision machining is required. | 230 | 400 | 26 | 112 HB | — |
HRDefault Hot rolled | Cheapest input stock for large diameters or where the bar will be peeled, forged or drawn afterwards. | 250 | 420 | 22 | 125 HB | — |
Cold drawn | Standard stocked form for automatic-lathe work: good size tolerance (h9/h11), straightness and chip control. | 420 | 560 | 10 | 170 HB | — |
cold drawn then centreless ground/polished (+C+SH) | Pick for shaft-quality bar needing h7/h8 tolerance and low Ra straight from stock, with no further turning. | 440 | 580 | 9 | 175 HB | 10.5 % IACS |
Cold rolled | Cold-rolled flats, squares and shaped bars where a bright surface and tight thickness tolerance are needed. | 460 | 590 | 8 | 10 HRC | 10.3 % IACS |
Supply forms, finishes and certifications
Ways 11SMn30 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 11SMn30?
11SMn30 is a resulfurized, non-leaded free-cutting carbon steel to EN 10087 (1.0736) with roughly 0.3 % sulfur forming manganese-sulfide inclusions; the closest US grade is AISI 1215. It is chosen when cycle time and turned surface finish on automatic and Swiss lathes matter more than strength, and is stocked as hot-rolled, cold-rolled, cold-drawn, annealed and peeled bar. Strength is modest (250 MPa yield, 420 MPa tensile, 125 HB), it is effectively unweldable, forms poorly and needs plating or oiling for corrosion protection. Where lead is acceptable, 11SMnPb30 machines faster still. 11SMn30 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). 11SMn30 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 94% of steel grades. Elongation at break is 22% and the elastic modulus is 205 GPa (29.7 Msi).
What is 11SMn30 used for?
- Screw machine parts
- Threaded fasteners
- Hydraulic and pneumatic fittings
- Bushings and spacers
- Pins and dowels
- Instrument and connector bodies
Advantages
- Easy to machine — 82/100, better than 98% of steel grades
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
Limitations
- Hard to polish — 30/100, worse than 100% of steel grades
- Difficult to weld — 12/100, worse than 96% of steel grades
- Low strength — 250 MPa (36.3 ksi), worse than 94% of steel grades
- Limited service temperature — 300°C (572 °F), worse than 78% of steel grades
11SMn30 properties
Typical room-temperature values for 11SMn30-HR; bars are the position among steel grades.
Physical3
11SMn30 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).
Mechanical15
11SMn30 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 94% of steel grades. Elongation at break is 22% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
11SMn30 is rated for continuous service to 300°C (572 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades. Thermal expansion is 11.7 µm/m·K (6.5 µin/in·°F).
Electrical3
11SMn30 conducts electricity at 10.5 % IACS, better than 89% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (8/100), worse than 99% of steel grades.
Sustainability4
Producing a kilogram of 11SMn30 takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
11SMn30's machinability is very good (82/100, better than 98% 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. 11SMn30 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 11SMn30
Is 11SMn30 easy to machine?
Benchmark free-cutting steel — short chips, high feeds/speeds, long tool life; ideal for CNC swiss/automatic lathes, but keep cuts light on thin walls due to low ductility.
Can 11SMn30 be welded?
Not recommended: 0.3% S and up to 0.11% P cause hot cracking and porosity; use mechanical joining or switch to a weldable grade.
Can 11SMn30 be formed, bent or molded?
Poor cold heading, bending and riveting behaviour (sulfide stringers split transversely); hot forming above 1050 °C only, with care against hot shortness.
Manufacturability
The process limits FabDigit applies to 11SMn30. Every 11SMn30 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Excellent82 / 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 |
11SMn30 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 | 0.09 |
| Sirimmed/low-Si practice | ≤ 0.05 | 0.03 |
| Mn | 0.9 – 1.3 | 1.1 |
| Pdeliberately high for chip breaking | ≤ 0.11 | 0.06 |
| SMnS free-machining inclusions | 0.27 – 0.33 | 0.3 |
| Fe | balance |
What surface finishes work on 11SMn30?
No anodizing; protect with zinc/nickel plating, black oxide or phosphate + oil — plating baths can leach inclusions, so degrease thoroughly and avoid aggressive pickling.
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 11SMn30 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.07151.073610087
- Similar grades
- 1215
How much does 11SMn30 cost?
11SMn30 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.
11SMn30 — frequently asked
What is 11SMn30 used for?
11SMn30 is typically used for screw machine parts, threaded fasteners, hydraulic and pneumatic fittings, bushings and spacers, pins and dowels and instrument and connector bodies. In short: free-machining sulfurized bar.
What is the yield strength of 11SMn30?
11SMn30 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 94% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 11SMn30 easy to machine?
Yes — machinability is rated very good (82/100, better than 98% of steel grades). Benchmark free-cutting steel — short chips, high feeds/speeds, long tool life; ideal for CNC swiss/automatic lathes, but keep cuts light on thin walls due to low ductility.
Can 11SMn30 be welded?
Not readily — weldability is rated not recommended (12/100). Not recommended: 0.3% S and up to 0.11% P cause hot cracking and porosity; use mechanical joining or switch to a weldable grade.
What surface finishes work on 11SMn30?
No anodizing; protect with zinc/nickel plating, black oxide or phosphate + oil — plating baths can leach inclusions, so degrease thoroughly and avoid aggressive pickling.
Can 11SMn30 be formed, bent or molded?
Poor cold heading, bending and riveting behaviour (sulfide stringers split transversely); hot forming above 1050 °C only, with care against hot shortness.
What is the maximum service temperature of 11SMn30?
11SMn30 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 11SMn30-HR and 11SMn30-CR?
HR is the default condition — cheapest input stock for large diameters or where the bar will be peeled, forged or drawn afterwards. CR: cold-rolled flats, squares and shaped bars where a bright surface and tight thickness tolerance are needed. Yield strength is 250 MPa in HR versus 460 MPa in CR.
How much does 11SMn30 cost?
11SMn30 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 11SMn30?
Yes — 11SMn30 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)
- Free-cutting steel bright bar datasheets (Ovako / Saarstahl / Deutsche Edelstahlwerke) — various (2022)
- GB/T 8731 (Y15 equivalent) — SAC (2008)
- SMM / Mysteel 1688 (2025)
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.