Steel 13MnNi6-3-N (Normalized)
Heat-treated state · default condition
EN 13MnNi6-3
Standard supply condition for low-temperature pressure-vessel plate; best balance of strength and -60 °C notch toughness.
Values for the N condition
Other 13MnNi6-3 tempers and conditions
13MnNi6-3 is listed in 6 conditions; see the grade overview at 13MnNi6-3.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Only for intermediate machining or severe cold forming; final component must be re-normalized to regain certified low-temperature toughness. | 310 | 480 | 30 | 140 HB | 8 % IACS |
+N + stress relieved / simulated PWHT | Property set to use for design when the vessel receives post-weld heat treatment — slightly lower yield, toughness retained. | 365 | 525 | 27 | 152 HB | 7.8 % IACS |
normalized and tempered | Pick for heavier plate/forgings where tempering is used to stabilise properties and lower residual stress with only a small strength loss. | 375 | 530 | 27 | 155 HB | 7.8 % IACS |
Forging, normalized (EN 10222-3 13MnNi6-3) | Flanges, nozzles and tube sheets forged and normalized to match plate properties in the same low-temperature vessel. | 375 | 540 | 24 | 158 HB | 7.8 % IACS |
NDefaultThis page Normalized | Standard supply condition for low-temperature pressure-vessel plate; best balance of strength and -60 °C notch toughness. | 385 | 550 | 26 | 160 HB | — |
Quenched and tempered | Used for thick sections and forgings needing uniform through-thickness strength and the highest low-temperature toughness reserve. | 410 | 570 | 25 | 12 HRC | 7.8 % IACS |
What is 13MnNi6-3-N?
13MnNi6-3-N is 13MnNi6-3 heat treated to N — standard supply condition for low-temperature pressure-vessel plate; best balance of strength and -60 °C notch toughness. 13MnNi6-3-N has a yield strength of 385 MPa (55.8 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 65% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi). 13MnNi6-3-N 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).
Advantages
- Tough — resists crack growth — 150 MPa·√m (136.5 ksi·√in), better than 96% of steel grades
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
- Forms and bends easily — 72/100, better than 88% of steel grades
- Readily welded — 85/100, better than 83% of steel grades
- Ductile — tolerates forming and impact — 26%, better than 82% of steel grades
13MnNi6-3-N properties
Typical room-temperature values for 13MnNi6-3-N; 10 are specific to this condition. Other listed values are 13MnNi6-3 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
13MnNi6-3-N 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).
Mechanical15
13MnNi6-3-N has a yield strength of 385 MPa (55.8 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 65% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
13MnNi6-3-N 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 11.7 µm/m·K (6.5 µin/in·°F).
Electrical2
13MnNi6-3-N has an electrical resistivity of 2.2×10⁻⁷ Ω·m.
Chemical & Environmental3
Corrosion resistance is not recommended (14/100), better than 70% of steel grades.
Sustainability4
Producing a kilogram of 13MnNi6-3-N takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
13MnNi6-3-N's machinability is good (58/100, better than 75% of steel grades); weldability excellent (85/100); formability very good (72/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 13MnNi6-3-N
Is 13MnNi6-3 easy to machine?
Machines like normalized 1.5 % Mn plate steel — moderate cutting speeds, coated carbide, watch for gummy chips in the annealed state.
Can 13MnNi6-3 be welded?
Readily weldable by SMAW/SAW/GMAW with matching low-alloy Ni consumables; use low-hydrogen practice, 100–150 °C preheat on thick sections and control heat input to preserve -60 °C Charpy values.
Can 13MnNi6-3 be formed, bent or molded?
Good hot and cold formability for shells and dished heads; cold-formed strains above roughly 5 % should be followed by normalizing or stress relief to restore toughness.
What surface finishes work on 13MnNi6-3?
No natural corrosion resistance — shot-blast to Sa 2½ and apply epoxy/zinc-rich paint, metallize or line; not anodizable.
13MnNi6-3 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 |
|---|---|---|
| Cproduct analysis limit slightly higher | ≤ 0.16 | 0.13 |
| Si | 0.15 – 0.5 | 0.3 |
| Mn | 0.85 – 1.7 | 1.4 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.02 | 0.01 |
| Ni | 0.3 – 0.85 | 0.55 |
| Cr | ≤ 0.3 | 0.1 |
| Mo | ≤ 0.08 | 0.03 |
| Cu | ≤ 0.3 | 0.1 |
| Al totalgrain refining; Al/N ratio controlled | ≥ 0.02 | 0.04 |
| N | ≤ 0.01 | 0.01 |
| Nb | ≤ 0.05 | 0.02 |
| V | ≤ 0.05 | 0.01 |
| Ti | ≤ 0.03 | 0.01 |
| Fe | balance | — |
13MnNi6-3-N — frequently asked
What is 13MnNi6-3-N used for?
13MnNi6-3-N is typically used for pressure vessels, boiler drums, cryogenic/low-temperature tanks and welded structural plate. In short: highly weldable vessel plate; -60 °C Charpy toughness; low-cost low-temperature steel.
What is the yield strength of 13MnNi6-3-N?
13MnNi6-3-N has a typical yield strength of 385 MPa (55.8 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 65% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 13MnNi6-3-N easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Machines like normalized 1.5 % Mn plate steel — moderate cutting speeds, coated carbide, watch for gummy chips in the annealed state.
Can 13MnNi6-3-N be welded?
Yes — weldability is rated excellent (85/100). Readily weldable by SMAW/SAW/GMAW with matching low-alloy Ni consumables; use low-hydrogen practice, 100–150 °C preheat on thick sections and control heat input to preserve -60 °C Charpy values.
What surface finishes work on 13MnNi6-3-N?
No natural corrosion resistance — shot-blast to Sa 2½ and apply epoxy/zinc-rich paint, metallize or line; not anodizable.
Can 13MnNi6-3-N be formed, bent or molded?
Good hot and cold formability for shells and dished heads; cold-formed strains above roughly 5 % should be followed by normalizing or stress relief to restore toughness.
What is the maximum service temperature of 13MnNi6-3-N?
13MnNi6-3-N 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.
What is the difference between 13MnNi6-3-N and 13MnNi6-3-A?
N is the default condition — standard supply condition for low-temperature pressure-vessel plate; best balance of strength and -60 °C notch toughness. A: only for intermediate machining or severe cold forming; final component must be re-normalized to regain certified low-temperature toughness. Yield strength is 385 MPa in N versus 310 MPa in A.
Sources
- EN 10028-4 — Flat products 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 13445-3 — Unfired pressure vessels: Design (material data, E, CTE) — CEN (2021)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Low-temperature pressure vessel plate 13MnNi6-3 (1.6217) data sheet — European plate producer (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.