Steel P215NL +N (Normalized)
Heat-treated state · default condition
EN P215NL
Standard delivery condition for EN 10216-4 seamless low-temperature tube; use for all -50 °C pressure service.
Values for the +N condition
Other P215NL tempers and conditions
P215NL is listed in 6 conditions; see the grade overview at P215NL.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Applied to welded assemblies to relieve residual stress; slightly lowers yield but keeps low-temperature toughness. | 240 | 410 | 32 | 115 HB | 10.5 % IACS |
+N | Lower-cost EFW/SAW tube in the same normalized condition; pick when seamless is not required by the design code. | 245 | 415 | 29 | 120 HB | 10.5 % IACS |
+NDefaultThis page Normalized | Standard delivery condition for EN 10216-4 seamless low-temperature tube; use for all -50 °C pressure service. | 250 | 420 | 30 | 120 HB | — |
+N plate/strip | Normalized flat product supplied for tube-making, headers and low-temperature fabricated shells. | 250 | 420 | 31 | 118 HB | 10.5 % IACS |
Cold drawn then normalized | Cold-drawn precision tube given a final normalizing anneal — tight tolerances and smooth bore with full low-temperature toughness restored. | 255 | 420 | 29 | 125 HB | 10.5 % IACS |
Cold drawn | As-drawn tube for non-pressure or mechanical use only — higher strength but degraded -50 °C impact values. | 400 | 500 | 14 | 160 HB | 10.5 % IACS |
What is P215NL +N?
P215NL +N is P215NL heat treated to +N — standard delivery condition for EN 10216-4 seamless low-temperature tube; use for all -50 °C pressure service. P215NL +N 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 30% and the elastic modulus is 210 GPa (30.5 Msi). P215NL +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
- Readily welded — 95/100, better than 97% of steel grades
- Forms and bends easily — 85/100, better than 96% of steel grades
- Ductile — tolerates forming and impact — 30%, better than 93% of steel grades
- Easy to machine — 65/100, better than 93% of steel grades
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
Limitations
- Low strength — 250 MPa (36.3 ksi), worse than 94% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
- Limited service temperature — 300°C (572 °F), worse than 78% of steel grades
P215NL +N properties
Typical room-temperature values for P215NL +N; 10 are specific to this condition. Other listed values are P215NL reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
P215NL +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).
Mechanical16
P215NL +N 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 30% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P215NL +N 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 12 µm/m·K (6.67 µin/in·°F).
Electrical3
P215NL +N conducts electricity at 10.5 % IACS, better than 89% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of P215NL +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%.
Manufacturability6
P215NL +N's machinability is good (65/100, better than 93% of steel grades); weldability excellent (95/100); formability excellent (85/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with P215NL +N
Is P215NL easy to machine?
Soft and gummy — use sharp positive-rake tools, high speed and generous coolant to avoid built-up edge and stringy chips.
Can P215NL be welded?
Excellent weldability (CEV ≈ 0.30–0.38); use low-hydrogen consumables with matching -50 °C impact properties, minimal preheat below ~30 mm, limit heat input to protect the fine grain size.
Can P215NL be formed, bent or molded?
Cold bends and flanges readily in the normalized condition; hot forming above 950 °C must be followed by re-normalizing to restore low-temperature toughness.
What surface finishes work on P215NL?
No inherent corrosion resistance — shot blast then paint, zinc-coat or galvanize; not anodizable.
P215NL 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 |
|---|---|---|
| Cladle analysis | ≤ 0.16 | 0.12 |
| Si | ≤ 0.35 | 0.22 |
| Mn | 0.4 – 1.2 | 0.8 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.03 |
| N | ≤ 0.01 | 0.01 |
| Crresidual | ≤ 0.3 | 0.05 |
| Curesidual | ≤ 0.3 | 0.1 |
| Niresidual | ≤ 0.3 | 0.05 |
| Moresidual | ≤ 0.08 | 0.02 |
| Nbmicro-alloy, optional | ≤ 0.05 | — |
| Timicro-alloy, optional | ≤ 0.04 | — |
| Vmicro-alloy, optional | ≤ 0.05 | — |
| Fe | balance | — |
P215NL +N — frequently asked
What is P215NL +N used for?
P215NL +N is typically used for cryogenic vessel plate, LPG storage tanks, low-temperature piping and pressure equipment shells. In short: best weldability in family; sub-zero vessel plate; highly formable pressure steel.
What is the yield strength of P215NL +N?
P215NL +N 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 6 listed tempers.
Is P215NL +N easy to machine?
Reasonably — machinability is rated good (65/100, better than 93% of steel grades). Soft and gummy — use sharp positive-rake tools, high speed and generous coolant to avoid built-up edge and stringy chips.
Can P215NL +N be welded?
Yes — weldability is rated excellent (95/100). Excellent weldability (CEV ≈ 0.30–0.38); use low-hydrogen consumables with matching -50 °C impact properties, minimal preheat below ~30 mm, limit heat input to protect the fine grain size.
What surface finishes work on P215NL +N?
No inherent corrosion resistance — shot blast then paint, zinc-coat or galvanize; not anodizable.
Can P215NL +N be formed, bent or molded?
Cold bends and flanges readily in the normalized condition; hot forming above 950 °C must be followed by re-normalizing to restore low-temperature toughness.
What is the maximum service temperature of P215NL +N?
P215NL +N 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 P215NL +N and P215NL-CD?
+N is the default condition — standard delivery condition for EN 10216-4 seamless low-temperature tube; use for all -50 °C pressure service. CD: as-drawn tube for non-pressure or mechanical use only — higher strength but degraded -50 °C impact values. Yield strength is 250 MPa in +N versus 400 MPa in CD.
Sources
- EN 10216-4 Seamless steel tubes for pressure purposes — Non-alloy and alloy steel tubes with specified low temperature properties — CEN (2013)
- EN 10217-6 Welded steel tubes for pressure purposes — Submerged arc welded non-alloy steel tubes with specified low temperature properties — CEN (2019)
- EN 10027-1/-2 Designation systems for steels (1.0451) — CEN (2016)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- EN 13480-3 Metallic industrial piping — Design and calculation (physical property tables) — CEN (2017)
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.