Steel P275NH
EN P275NH
P275NH is a normalized fine-grain non-alloy pressure-vessel steel to EN 10028-3 (1.0487), broadly equivalent in duty to ASTM A516 Grade 60.
Reference datasheet — P275NH 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
P275NH tempers and conditions
P275NH 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 | Maximum thickness range of the standard; lowest guaranteed strength level. | 230 | 405 | 26 | 122 HB | 10.5 % IACS |
N | Very heavy plate; 215 MPa min yield, toughness verified at mid-thickness. | 240 | 410 | 27 | 124 HB | 10.5 % IACS |
N | Heavy sections for nozzles and tubesheets; 225 MPa minimum yield. | 250 | 420 | 28 | 126 HB | 10.5 % IACS |
N | Thick plate for large tanks; yield 235 MPa min and lower tensile band. | 260 | 425 | 28 | 128 HB | 10.5 % IACS |
N | Heavier vessel shells; minimum yield 255 MPa, tensile band unchanged. | 280 | 440 | 29 | 132 HB | 10.5 % IACS |
N | Medium-thickness plate; yield drops one step to 265 MPa minimum. | 290 | 445 | 29 | 133 HB | 10.5 % IACS |
Normalized then stress relieved / simulated PWHT | Choose when the fabricated vessel will see PWHT; slightly lower strength but improved dimensional stability and residual-stress state. | 290 | 440 | 31 | 130 HB | 10.5 % IACS |
NDefault Normalized | Standard stocked delivery condition for thin pressure-vessel plate with full 275 MPa yield. | 300 | 450 | 30 | 135 HB | 10.5 % IACS |
Supply forms, finishes and certifications
Ways P275NH is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
HIC | HIC/sour-service tested plate | Certification |
Z25/Z35 | Z-quality | Certification |
What is P275NH?
P275NH is a normalized fine-grain non-alloy pressure-vessel steel to EN 10028-3 (1.0487), broadly equivalent in duty to ASTM A516 Grade 60. It is chosen for good low-temperature toughness combined with excellent weldability (CEV typically ≤ 0.40), and is supplied as normalized plate in thickness bands from 16 mm to 250 mm, with N+SR, Z25/Z35 through-thickness and HIC-tested variants. Typical values are 300 MPa yield, 450 MPa tensile, 30 % elongation and about 135 HB, with service to 400 °C. The steel has no inherent corrosion resistance and needs paint or galvanizing; specify P275NL1 where guaranteed sub-zero impact energy is required. P275NH has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,490°C (2,714 °F). P275NH has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Elongation at break is 30% and the elastic modulus is 210 GPa (30.5 Msi).
What is P275NH used for?
- pressure vessels
- pipeline components
- heat exchangers
- boiler parts
Advantages
- Ductile — tolerates forming and impact — 30%, better than 93% of steel grades
- Readily welded — 90/100, better than 90% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- Forms and bends easily — 70/100, better than 86% of steel grades
Limitations
- Low strength — 300 MPa (43.5 ksi), worse than 86% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
P275NH properties
Typical room-temperature values for P275NH-N; bars are the position among steel grades.
Physical3
P275NH has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,490°C (2,714 °F).
Mechanical16
P275NH has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Elongation at break is 30% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P275NH is rated for continuous service to 400°C (752 °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
P275NH 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 P275NH takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability8
P275NH's machinability is good (60/100, better than 83% of steel grades); weldability excellent (90/100); formability very good (70/100).
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. P275NH is highlighted; hover a dot for its name, or open the interactive family chart.
Working with P275NH
Is P275NH 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 S levels.
Can P275NH be welded?
Excellent weldability with CEV typically ≤ 0.40; SAW/SMAW/GMAW with low-hydrogen consumables, preheat 50–100 °C for thick sections, PWHT 550–620 °C when required by EN 13445 / PED.
Can P275NH be formed, bent or molded?
Cold rollable into shells with generous bend radii (≥ 2t for t ≤ 20 mm); hot forming 850–1000 °C followed by re-normalizing to restore fine-grain properties.
P275NH 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 ≤ 150 mm | ≤ 0.18 | 0.14 |
| Si | ≤ 0.4 | 0.25 |
| Mn | 0.5 – 1.4 | 1.1 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.01 | 0 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.04 |
| N | ≤ 0.01 | 0.01 |
| Cr | ≤ 0.3 | 0.05 |
| Cu | ≤ 0.3 | 0.08 |
| Ni | ≤ 0.5 | 0.1 |
| Mo | ≤ 0.08 | 0.02 |
| Nb | ≤ 0.05 | 0.02 |
| Ti | ≤ 0.03 | 0.01 |
| VNb+Ti+V ≤ 0.05 combined | ≤ 0.05 | 0.01 |
| Fe | balance |
What surface finishes work on P275NH?
No anodizing; shot-blast to Sa 2½ then epoxy/zinc-rich primer, hot-dip galvanize or weld-overlay clad 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 P275NH in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.048710028-3
- Similar grades
- A516 Grade 60
How much does P275NH cost?
P275NH 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.
P275NH — frequently asked
What is P275NH used for?
P275NH is typically used for pressure vessels, pipeline components, heat exchangers and boiler parts. In short: workhorse EN vessel plate; weldable at CEV ≤ 0.40; A516 Grade 60 counterpart.
What is the yield strength of P275NH?
P275NH has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is P275NH easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% 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 S levels.
Can P275NH be welded?
Yes — weldability is rated excellent (90/100). Excellent weldability with CEV typically ≤ 0.40; SAW/SMAW/GMAW with low-hydrogen consumables, preheat 50–100 °C for thick sections, PWHT 550–620 °C when required by EN 13445 / PED.
What surface finishes work on P275NH?
No anodizing; shot-blast to Sa 2½ then epoxy/zinc-rich primer, hot-dip galvanize or weld-overlay clad for corrosive duty.
Can P275NH be formed, bent or molded?
Cold rollable into shells with generous bend radii (≥ 2t for t ≤ 20 mm); hot forming 850–1000 °C followed by re-normalizing to restore fine-grain properties.
What is the maximum service temperature of P275NH?
P275NH 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 P275NH-N and P275NH N-50-70?
N is the default condition — standard stocked delivery condition for thin pressure-vessel plate with full 275 MPa yield. N-50-70: thick plate for large tanks; yield 235 MPa min and lower tensile band. Yield strength is 300 MPa in N versus 260 MPa in N-50-70.
How much does P275NH cost?
P275NH 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 — CEN (2018)
- EN 13445-3 Unfired pressure vessels — Design — CEN (2021)
- ASTM A516/A516M Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service — ASTM (2021)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Pressure vessel plate P275NH data sheet — European plate mill (Dillinger/voestalpine typical) (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.