Steel P355NL2
EN 1.1106
P355NL2 is a normalized, fine-grain carbon-manganese pressure vessel plate (1.1106) supplied to EN 10028-3, with guaranteed low-temperature impact testing for sub-zero service.
Reference datasheet — P355NL2 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
P355NL2 tempers and conditions
P355NL2 is supplied in 8 conditions, soft to hard. N is the default FabDigit quotes; the values on this page are for it.
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 | 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?
P355NL2 is a normalized, fine-grain carbon-manganese pressure vessel plate (1.1106) supplied to EN 10028-3, with guaranteed low-temperature impact testing for sub-zero service. Engineers specify it for welded shells, heads and flanges where toughness at −50 °C is required; default-condition plate gives 385 MPa yield, 550 MPa tensile, 26 % elongation and about 155 HB, with service to 400 °C. Thickness-graded conditions (N t16-35 through N t100-150), N+SR and through-thickness N+Z35 are on file. It has no corrosion resistance of its own and needs coating or cladding; where sub-zero toughness is not required, P355NL1 or P355NH plate is the cheaper choice. P355NL2 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). P355NL2 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).
What is P355NL2 used for?
- Pressure vessels
- Boiler shells
- Cryogenic storage tanks
- Piping flanges
- Chemical process equipment
Advantages
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- Forms and bends easily — 68/100, better than 83% of steel grades
- Ductile — tolerates forming and impact — 26%, better than 82% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
P355NL2 properties
Typical room-temperature values for P355NL2-N; bars are the position among steel grades.
Physical3
P355NL2 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 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
P355NL2 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 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 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's machinability is good (60/100, better than 83% of steel grades); weldability excellent (88/100); formability good (68/100).
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. P355NL2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with P355NL2
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.
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 |
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.
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 P355NL2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.1106
- Similar grades
- A537 Class 1Q345R
How much does P355NL2 cost?
P355NL2 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.
P355NL2 — frequently asked
What is P355NL2 used for?
P355NL2 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?
P355NL2 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 8 listed tempers.
Is P355NL2 easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% 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 be welded?
Yes — weldability is rated excellent (88/100). 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?
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 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?
P355NL2 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.
How much does P355NL2 cost?
P355NL2 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.
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; 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.