Steel 11MnNi5-3
EN 11MnNi5-3
11MnNi5-3 (1.6212) is a fine-grain low-alloy manganese-nickel steel for low-temperature service, with nickel added to hold notch toughness down to −60 °C.
Reference datasheet — 11MnNi5-3 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the +N condition
11MnNi5-3 tempers and conditions
11MnNi5-3 is supplied in 5 conditions, soft to hard. +N 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 |
|---|---|---|---|---|---|---|
+N | Same normalized condition in heavier gauges, where the specified minimum yield drops with thickness. | 310 | 455 | 30 | 145 HB | 8.6 % IACS |
EN 10222-3 forged flanges/fittings, normalized + tempered | Delivery condition for forged flanges, nozzles and fittings matched to +N/+NT plate in cryogenic vessels. | 320 | 470 | 28 | 150 HB | 8.6 % IACS |
+NDefault Normalized | Standard delivery condition for EN 10028-4 low-temperature pressure-vessel plate; pick for tanks and vessels down to −60 °C. | 330 | 470 | 30 | 150 HB | — |
Normalized and tempered | Choose when extra stress relief and the most uniform low-temperature toughness are needed in thicker plate or after heavy forming. | 335 | 460 | 31 | 148 HB | 8.6 % IACS |
Quenched and tempered | Less common condition for heavy forgings and thick shells where higher yield and through-thickness toughness are required. | 380 | 510 | 28 | 165 HB | 8.4 % IACS |
Supply forms, finishes and certifications
Ways 11MnNi5-3 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Tube +N | EN 10216-4 seamless tube, normalized | Supply form |
What is 11MnNi5-3?
11MnNi5-3 (1.6212) is a fine-grain low-alloy manganese-nickel steel for low-temperature service, with nickel added to hold notch toughness down to −60 °C. Engineers use it for structural plate, shells, heads, forgings and seamless tube in +N, +NT and +QT conditions; typical values are 330 MPa yield, 470 MPa tensile, 30 % elongation, 150 HB and service to 350 °C. Its low carbon equivalent gives very good weldability (score 88) and good cold formability (75), but it has no inherent corrosion resistance and must be coated or painted. 11MnNi5-3 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F). 11MnNi5-3 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 78% of steel grades. Elongation at break is 30% and the elastic modulus is 210 GPa (30.5 Msi).
What is 11MnNi5-3 used for?
- offshore structures
- shipbuilding plate
- low temperature forgings
Advantages
- Ductile — tolerates forming and impact — 30%, better than 93% of steel grades
- Easy to machine — 65/100, better than 93% of steel grades
- Forms and bends easily — 75/100, better than 90% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- Tough — resists crack growth — 120 MPa·√m (109.2 ksi·√in), better than 81% of steel grades
Limitations
- Low strength — 330 MPa (47.9 ksi), worse than 78% of steel grades
11MnNi5-3 properties
Typical room-temperature values for 11MnNi5-3-+N; bars are the position among steel grades.
Physical3
11MnNi5-3 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical14
11MnNi5-3 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 78% of steel grades. Elongation at break is 30% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
11MnNi5-3 is rated for continuous service to 350°C (662 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 11.8 µm/m·K (6.56 µin/in·°F).
Electrical2
11MnNi5-3 has an electrical resistivity of 2×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 11MnNi5-3 takes about 26 MJ of energy and emits 2 kg of CO₂ — less than 64% of steel grades. Typical recycled content is 25%.
Manufacturability7
11MnNi5-3's machinability is good (65/100, better than 93% of steel grades); weldability excellent (88/100); formability very good (75/100).
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. 11MnNi5-3 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 11MnNi5-3
Is 11MnNi5-3 easy to machine?
Machines like normalized C-Mn pressure-vessel plate — moderate feeds with coated carbide, gummy chips, no work-hardening problems.
Can 11MnNi5-3 be welded?
Very good weldability with low carbon equivalent; use low-hydrogen consumables with matching Ni content, moderate preheat in thick sections and control heat input to preserve −60 °C toughness.
Can 11MnNi5-3 be formed, bent or molded?
Good cold formability for heads and shells; hot forming 850–950 °C followed by re-normalizing, and stress relief 550–600 °C after heavy cold work.
11MnNi5-3 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 |
|---|---|---|
| Cgrade designator 11 ≈ 0.11 % C | ≤ 0.14 | 0.11 |
| Si | ≤ 0.5 | 0.25 |
| Mn | 0.7 – 1.5 | 1.1 |
| P | ≤ 0.03 | 0.01 |
| Slow S for through-thickness toughness | ≤ 0.01 | 0 |
| Ni | 0.3 – 0.85 | 0.55 |
| Crresidual | ≤ 0.3 | 0.08 |
| Curesidual | ≤ 0.3 | 0.1 |
| Moresidual | ≤ 0.08 | 0.02 |
| Nbgrain refining | ≤ 0.05 | 0.02 |
| V | ≤ 0.05 | 0.01 |
| Ti | ≤ 0.05 | 0.01 |
| Altotal Al, fine-grain treatment | ≥ 0.02 | 0.04 |
| N | ≤ 0.01 | 0.01 |
| Fe | balance |
What surface finishes work on 11MnNi5-3?
No self-protection: shot-blast then paint, epoxy or metallize; hot-dip galvanizing possible but check toughness after zinc bath exposure.
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).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 11MnNi5-3 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.6212
How much does 11MnNi5-3 cost?
11MnNi5-3 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
11MnNi5-3 — frequently asked
What is 11MnNi5-3 used for?
11MnNi5-3 is typically used for offshore structures, shipbuilding plate and low temperature forgings. In short: toughness to −60 °C; highly weldable low-alloy plate; fine-grain cold-service steel.
What is the yield strength of 11MnNi5-3?
11MnNi5-3 has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 78% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 11MnNi5-3 easy to machine?
Reasonably — machinability is rated good (65/100, better than 93% of steel grades). Machines like normalized C-Mn pressure-vessel plate — moderate feeds with coated carbide, gummy chips, no work-hardening problems.
Can 11MnNi5-3 be welded?
Yes — weldability is rated excellent (88/100). Very good weldability with low carbon equivalent; use low-hydrogen consumables with matching Ni content, moderate preheat in thick sections and control heat input to preserve −60 °C toughness.
What surface finishes work on 11MnNi5-3?
No self-protection: shot-blast then paint, epoxy or metallize; hot-dip galvanizing possible but check toughness after zinc bath exposure.
Can 11MnNi5-3 be formed, bent or molded?
Good cold formability for heads and shells; hot forming 850–950 °C followed by re-normalizing, and stress relief 550–600 °C after heavy cold work.
What is the maximum service temperature of 11MnNi5-3?
11MnNi5-3 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 11MnNi5-3 cost?
11MnNi5-3 is a standard-cost steel ($$), cheaper than about 71% 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.
Sources
- EN 10028-4 Flat products made of steels for pressure purposes — Nickel alloy steels with specified low temperature properties — CEN (2017)
- EN 10222-3 Steel forgings for pressure purposes — Nickel steels with specified low temperature properties — CEN (1998)
- EN 10216-4 Seamless steel tubes for pressure purposes — Non-alloy and alloy steels with specified low temperature properties — CEN (2013)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Low-temperature pressure-vessel plate datasheets (1.6212 / 11MnNi5-3) — European plate mills (2022)
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.