Steel P275NL1
EN 1.0488, 10028-3
P275NL1 is the low-temperature-tough version of the P275 normalized fine-grain pressure steel to EN 10028-3 (1.0488), specified with additional impact testing and comparable in duty to ASTM A333 Grade 6.
Reference datasheet — P275NL1 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
P275NL1 tempers and conditions
P275NL1 is supplied in 9 conditions, soft to hard. N is the default FabDigit quotes; the values on this page are for it.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
N | Maximum thickness covered by EN 10028-3; specify centre-of-thickness impact testing. | 250 | 410 | 26 | 128 HB | 10.8 % IACS |
N | Very heavy sections where through-thickness normalizing response limits strength. | 260 | 415 | 26 | 130 HB | 10.8 % IACS |
N | Thick plate for nozzles/forged-equivalent sections; tensile band drops to 370–490 MPa. | 270 | 425 | 27 | 132 HB | 10.8 % IACS |
N | Heavy shell plate and tubesheet blanks; 255 MPa minimum yield. | 290 | 440 | 27 | 136 HB | 10.8 % IACS |
Normalized then stress relieved / simulated PWHT | Order when the fabricated vessel will see PWHT; properties verified after simulated heat-treatment cycles. | 295 | 440 | 29 | 135 HB | 10.8 % IACS |
N | Medium plate for vessel shells and heads; yield derated to 265 MPa minimum. | 300 | 445 | 28 | 138 HB | 10.8 % IACS |
N + HIC/SSC tested | Low-S, calcium-treated melt with NACE TM0284 HIC testing for wet H2S separators and knock-out drums. | 305 | 445 | 28 | 135 HB | 10.8 % IACS |
NDefault Normalized | Standard stocked condition for thin plate and shell courses; full 275 MPa yield with −40 °C impact guarantee. | 310 | 450 | 28 | 140 HB | 10.8 % IACS |
normalized with through-thickness (Z-quality) ductility per EN 10164 | Pick for nozzle-to-shell or T-joint welds loaded in the thickness direction to avoid lamellar tearing. | 310 | 450 | 28 | 140 HB | 10.8 % IACS |
What is P275NL1?
P275NL1 is the low-temperature-tough version of the P275 normalized fine-grain pressure steel to EN 10028-3 (1.0488), specified with additional impact testing and comparable in duty to ASTM A333 Grade 6. Engineers use it for pressure equipment in cold service, supplied as normalized plate in thickness bands from 16 mm to 250 mm, with N+SR, N+Z35 through-thickness and N+HIC options. Typical values are 310 MPa yield, 450 MPa tensile, 28 % elongation and about 140 HB, with weld procedures qualified to protect −40 °C toughness. Bare surfaces corrode in humid or marine air, so coating is mandatory; use P275NH where sub-zero impact energy is not required. P275NL1 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). P275NL1 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 83% of steel grades. Elongation at break is 28% and the elastic modulus is 210 GPa (30.5 Msi).
What is P275NL1 used for?
- low-temperature pressure vessels
- cryogenic piping
- offshore equipment
- gas storage tanks
Advantages
- High electrical conductivity — 10.8 % IACS, better than 94% of steel grades
- Ductile — tolerates forming and impact — 28%, better than 89% of steel grades
- Easy to machine — 62/100, better than 89% of steel grades
- Forms and bends easily — 72/100, better than 88% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
- Low strength — 310 MPa (45 ksi), worse than 83% of steel grades
P275NL1 properties
Typical room-temperature values for P275NL1-N; bars are the position among steel grades.
Physical3
P275NL1 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
P275NL1 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 83% of steel grades. Elongation at break is 28% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P275NL1 is rated for continuous service to 400°C (752 °F). It conducts heat at 49 W/m·K (28.3 BTU/hr·ft·°F), better than 83% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
P275NL1 conducts electricity at 10.8 % IACS, better than 94% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of P275NL1 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
P275NL1's machinability is good (62/100, better than 89% of steel grades); weldability excellent (88/100); formability very good (72/100).
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. P275NL1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with P275NL1
Is P275NL1 easy to machine?
Machines like normalized C-Mn steel (~65 % of AISI 1212); use sharp positive-rake carbide, moderate speeds, and expect gummy chips at low hardness.
Can P275NL1 be welded?
Excellent weldability with CEV ≤ 0.40 — SAW/SMAW/GMAW with low-hydrogen consumables; preheat 100–150 °C for thick sections and control heat input to protect the −40 °C toughness.
Can P275NL1 be formed, bent or molded?
Cold-rolls and dishes readily; hot forming above 950 °C requires re-normalizing, and heavy cold strains (>5 %) should be followed by normalizing or stress relief per EN 13445-4.
P275NL1 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, t ≤ 30 mm | ≤ 0.16 | 0.13 |
| Si | ≤ 0.4 | 0.3 |
| Mn | 0.5 – 1.4 | 1.1 |
| Ptighter than P275NH | ≤ 0.03 | 0.01 |
| Stighter than P275NH | ≤ 0.02 | 0.01 |
| Altotal Al, grain refining | ≥ 0.02 | 0.04 |
| N | ≤ 0.02 | 0.01 |
| Cr | ≤ 0.3 | 0.08 |
| Cu | ≤ 0.3 | 0.1 |
| Ni | ≤ 0.5 | 0.15 |
| Mo | ≤ 0.08 | 0.02 |
| NbNb+Ti+V ≤ 0.05 combined limit applies | ≤ 0.05 | 0.02 |
| Ti | ≤ 0.03 | 0.01 |
| V | ≤ 0.05 | 0.01 |
| Fe | balance |
What surface finishes work on P275NL1?
No anodizing; shot-blast to Sa 2½ then epoxy/zinc primer, hot-dip galvanize or metallize — bare surfaces rust quickly in humid or marine air.
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 P275NL1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.048810028-3
- Similar grades
- A333 Grade 6
How much does P275NL1 cost?
P275NL1 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.
P275NL1 — frequently asked
What is P275NL1 used for?
P275NL1 is typically used for low-temperature pressure vessels, cryogenic piping, offshore equipment and gas storage tanks. In short: cold-service P275 variant; impact-tested to −40 °C; A333 Grade 6 counterpart.
What is the yield strength of P275NL1?
P275NL1 has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 83% of steel grades. Strength varies by condition: see the 9 listed tempers.
Is P275NL1 easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% of steel grades). Machines like normalized C-Mn steel (~65 % of AISI 1212); use sharp positive-rake carbide, moderate speeds, and expect gummy chips at low hardness.
Can P275NL1 be welded?
Yes — weldability is rated excellent (88/100). Excellent weldability with CEV ≤ 0.40 — SAW/SMAW/GMAW with low-hydrogen consumables; preheat 100–150 °C for thick sections and control heat input to protect the −40 °C toughness.
What surface finishes work on P275NL1?
No anodizing; shot-blast to Sa 2½ then epoxy/zinc primer, hot-dip galvanize or metallize — bare surfaces rust quickly in humid or marine air.
Can P275NL1 be formed, bent or molded?
Cold-rolls and dishes readily; hot forming above 950 °C requires re-normalizing, and heavy cold strains (>5 %) should be followed by normalizing or stress relief per EN 13445-4.
What is the maximum service temperature of P275NL1?
P275NL1 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 P275NL1-N and P275NL1 N-40-60?
N is the default condition — standard stocked condition for thin plate and shell courses; full 275 MPa yield with −40 °C impact guarantee. N-40-60: heavy shell plate and tubesheet blanks; 255 MPa minimum yield. Yield strength is 310 MPa in N versus 290 MPa in N-40-60.
How much does P275NL1 cost?
P275NL1 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 — Weldable fine grain steels, normalized — CEN (2017)
- EN 10164 Steel products with improved deformation properties perpendicular to the surface — CEN (2018)
- ASTM A333/A333M Grade 6 (low-temperature service pipe, comparable properties) — ASTM (2018)
- GB 3531 (16MnDR, domestic counterpart) — SAC (2014)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- EN 13445-3 Unfired pressure vessels — Design — CEN (2021)
- worldsteel LCI data for steel plate — World Steel Association (2023)
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.