Steel P355NL2 N t50-100
Grade
EN 1.1106
Thick section for high-pressure vessels; both yield and tensile bands step down.
Values for the N t50-100 condition
Other P355NL2 tempers and conditions
P355NL2 is listed in 8 conditions; see the grade overview at P355NL2.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
N | Very heavy plate (nozzles, forgings replacement); lowest guaranteed strength band, toughness confirmed at ¼ t. | 330 | 505 | 23 | 145 HB | 10.5 % IACS |
N t50-100This page N | Thick section for high-pressure vessels; both yield and tensile bands step down. | 350 | 525 | 24 | 148 HB | 10.5 % IACS |
N | Heavier shell courses and tubesheets where 335 MPa yield still suffices. | 365 | 540 | 25 | 150 HB | 10.5 % IACS |
Normalized plus simulated post-weld heat treatment / stress relief | Order this when the vessel gets PWHT and the purchaser requires properties tested in the simulated PWHT condition. | 370 | 535 | 27 | 148 HB | 10.5 % IACS |
N | Medium plate for shells and heads; yield guarantee drops one step with thickness. | 375 | 545 | 25 | 152 HB | 10.5 % IACS |
NDefault Normalized | Standard stocked delivery condition for thin plate; full 355 MPa yield with −50 °C impact guarantee. | 385 | 550 | 26 | 155 HB | 10.5 % IACS |
normalized with through-thickness (Z-quality) tensile testing per EN 10164 | Choose for heavily restrained T-joints or thick nozzle-to-shell welds where lamellar tearing is a risk. | 385 | 550 | 26 | 155 HB | 10.5 % IACS |
Normalized rolling | Mill-route alternative to furnace normalizing; same mechanical guarantees, lower cost, but re-normalizing after hot forming may be required. | 390 | 555 | 26 | 158 HB | 10.5 % IACS |
What is P355NL2 N t50-100?
P355NL2 N t50-100 is P355NL2 in the N t50-100 grade — thick section for high-pressure vessels; both yield and tensile bands step down. P355NL2 N t50-100 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 525 MPa (76.1 ksi) — weaker than 74% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi). P355NL2 N t50-100 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). N is the default condition FabDigit quotes; N t50-100 is available on request or by drawing note.
Advantages
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
- Easy to machine — 62/100, better than 89% of steel grades
- Readily welded — 86/100, better than 85% of steel grades
- Forms and bends easily — 64/100, better than 79% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
P355NL2 N t50-100 properties
Typical room-temperature values for P355NL2 N t50-100; 22 are specific to this condition. Other listed values are P355NL2 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
P355NL2 N t50-100 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
P355NL2 N t50-100 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 525 MPa (76.1 ksi) — weaker than 74% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P355NL2 N t50-100 is rated for continuous service to 400°C (752 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
P355NL2 N t50-100 conducts electricity at 10.5 % IACS, better than 89% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of P355NL2 N t50-100 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
P355NL2 N t50-100's machinability is good (62/100, better than 89% of steel grades); weldability excellent (86/100); formability good (64/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with P355NL2 N t50-100
Is P355NL2 easy to machine?
Machines like normalized C-Mn steel (~60 % of AISI 1212): use carbide at 120–180 m/min, generous feed to avoid work-hardened, gummy chips.
Can P355NL2 be welded?
Excellent weldability by SMAW/SAW/GMAW with low-hydrogen basic consumables (e.g. E7018-1 / S2Ni1); preheat 100–150 °C for thick or restrained joints and control heat input to preserve −50 °C HAZ toughness.
Can P355NL2 be formed, bent or molded?
Good cold formability for heads and rolled shells (min bend radius ≈ 2t); after cold forming >5 % strain or any hot forming, re-normalize to restore low-temperature impact properties.
What surface finishes work on P355NL2?
No inherent corrosion resistance — shot-blast to Sa 2½ and apply epoxy/zinc-rich paint, metallize, or use stainless weld-overlay/roll-bonded cladding for corrosive duty.
P355NL2 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 |
|---|---|---|
| C≤0.18 % for t ≤ 30 mm per EN 10028-3 | ≤ 0.18 | 0.15 |
| Si | ≤ 0.5 | 0.35 |
| Mn | 0.9 – 1.7 | 1.4 |
| PNL2 quality | ≤ 0.02 | 0.01 |
| SNL2 quality, low S for toughness | ≤ 0.01 | 0 |
| Nhigher if N-binding elements present | ≤ 0.02 | 0.01 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.04 |
| Cr | ≤ 0.3 | 0.05 |
| Cu | ≤ 0.3 | 0.1 |
| Mo | ≤ 0.08 | 0.02 |
| Ni | ≤ 0.5 | 0.15 |
| NbNb+Ti+V ≤ 0.12 % | ≤ 0.05 | 0.02 |
| Ti | ≤ 0.03 | 0.01 |
| V | ≤ 0.1 | 0.02 |
| Nb+Ti+Vsum limit | ≤ 0.12 | 0.05 |
| Fe | balance | — |
P355NL2 N t50-100 — frequently asked
What is P355NL2 N t50-100 used for?
P355NL2 N t50-100 is typically used for pressure vessels, boiler shells, cryogenic storage tanks, piping flanges and chemical process equipment. In short: impact tested to −50 °C; normalized fine-grain plate; code-grade weldability.
What is the yield strength of P355NL2 N t50-100?
P355NL2 N t50-100 has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 525 MPa (76.1 ksi) — weaker than 74% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is P355NL2 N t50-100 easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% of steel grades). Machines like normalized C-Mn steel (~60 % of AISI 1212): use carbide at 120–180 m/min, generous feed to avoid work-hardened, gummy chips.
Can P355NL2 N t50-100 be welded?
Yes — weldability is rated excellent (86/100). Excellent weldability by SMAW/SAW/GMAW with low-hydrogen basic consumables (e.g. E7018-1 / S2Ni1); preheat 100–150 °C for thick or restrained joints and control heat input to preserve −50 °C HAZ toughness.
What surface finishes work on P355NL2 N t50-100?
No inherent corrosion resistance — shot-blast to Sa 2½ and apply epoxy/zinc-rich paint, metallize, or use stainless weld-overlay/roll-bonded cladding for corrosive duty.
Can P355NL2 N t50-100 be formed, bent or molded?
Good cold formability for heads and rolled shells (min bend radius ≈ 2t); after cold forming >5 % strain or any hot forming, re-normalize to restore low-temperature impact properties.
What is the maximum service temperature of P355NL2 N t50-100?
P355NL2 N t50-100 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between P355NL2-N and P355NL2-NR?
N is the default condition — standard stocked delivery condition for thin plate; full 355 MPa yield with −50 °C impact guarantee. NR: mill-route alternative to furnace normalizing; same mechanical guarantees, lower cost, but re-normalizing after hot forming may be required. Yield strength is 385 MPa in N versus 390 MPa in NR.
Sources
- EN 10028-3 — Flat products made of steels for pressure purposes, Part 3: Weldable fine grain steels, normalized — CEN (2017)
- EN 10164 — Steel products with improved deformation properties perpendicular to the surface (Z-quality) — CEN (2018)
- EN 13445-3 — Unfired pressure vessels: Design (physical property data) — CEN (2021)
- ASTM A537/A537M — Heat-Treated Carbon-Manganese-Silicon Steel Plates for Pressure Vessels — ASTM (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Pressure vessel plate P355NL1/NL2 datasheet — Dillinger / Voestalpine Grobblech (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.