Steel P285NH
EN P285NH
P285NH (1.0477) is a normalized non-alloy carbon steel plate to EN 10028-3, supplied in N, NR, N+SR and normalized-forged conditions with guaranteed toughness at ambient and elevated temperature.
Reference datasheet — P285NH 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
P285NH tempers and conditions
P285NH is supplied in 4 conditions, soft to hard. N is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Normalized plus stress relieved / simulated PWHT | Choose when the vessel will see post-weld heat treatment (typ. 560–620 °C) and the plate must be tested in the simulated PWHT condition; slight softening, better dimensional stability. | 305 | 435 | 27 | 133 HB | 10 % IACS |
normalized weldable fine-grain forging per EN 10222-4 | Flanges, nozzles, tube sheets and heavy forged fittings; property class follows section thickness, with reduced proof stress in heavy sections. | 305 | 440 | 24 | 138 HB | 10 % IACS |
NDefault Normalized | Standard supply condition for pressure vessel shells, heads and forgings requiring 285 MPa minimum yield and 40 J at -20 °C. | 320 | 450 | 26 | 140 HB | — |
Normalizing rolled plate | Plate rolled so that the final pass leaves a normalized-equivalent structure — same guaranteed properties as +N without a separate furnace cycle, cheaper on heavy plate. | 330 | 455 | 26 | 145 HB | 10 % IACS |
What is P285NH?
P285NH (1.0477) is a normalized non-alloy carbon steel plate to EN 10028-3, supplied in N, NR, N+SR and normalized-forged conditions with guaranteed toughness at ambient and elevated temperature. It is used for pressure vessel and boiler parts at 320 MPa yield, 450 MPa tensile, 26 % elongation and about 140 HB (77 HRB), with a weldability rating of 90 that suits heavy welded fabrication. Maximum service temperature is 400 °C and the surface has no corrosion resistance, so a coating and corrosion allowance are needed. P295GH offers higher strength in the same EN 10028 plate family. P285NH 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). P285NH has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 81% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
What is P285NH used for?
- pressure vessel shells
- boiler drums
- heat exchanger plate
- process equipment
Advantages
- Readily welded — 90/100, better than 90% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Forms and bends easily — 72/100, better than 88% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
- Low strength — 320 MPa (46.4 ksi), worse than 81% of steel grades
P285NH properties
Typical room-temperature values for P285NH-N; bars are the position among steel grades.
Physical3
P285NH 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
P285NH has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 81% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P285NH 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 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
P285NH conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of P285NH takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
P285NH's machinability is good (60/100, better than 83% of steel grades); weldability excellent (90/100); 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. P285NH is highlighted; hover a dot for its name, or open the interactive family chart.
Working with P285NH
Is P285NH easy to machine?
Machines like normalized 1020/1518 C-Mn steel at roughly 60 % of AISI 1212; use sharp positive-rake carbide, moderate speeds and good chip control since the low-carbon structure is gummy.
Can P285NH be welded?
Excellent weldability by SMAW/SAW/GMAW with low-hydrogen consumables matching 285 MPa yield; preheat 100–150 °C for heavy sections and apply PWHT at 560–620 °C where the code requires it.
Can P285NH be formed, bent or molded?
Cold roll and press for shells and heads with generous bend radii (≥2 t); hot forming above ~900 °C should be followed by re-normalizing to restore the fine-grain properties.
P285NH 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 | ≤ 0.18 | 0.15 |
| Si | ≤ 0.4 | 0.3 |
| Mn | 0.9 – 1.5 | 1.2 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Altotal Al, grain refining | ≥ 0.02 | 0.03 |
| N | ≤ 0.02 | 0.01 |
| Cr | ≤ 0.3 | 0.05 |
| Cu | ≤ 0.3 | 0.1 |
| Ni | ≤ 0.5 | 0.1 |
| Mo | ≤ 0.08 | 0.02 |
| Nb | ≤ 0.05 | 0.02 |
| Ti | ≤ 0.03 | 0.01 |
| V | ≤ 0.1 | 0.02 |
| Fe | balance |
What surface finishes work on P285NH?
No anodizing; protect by blasting plus epoxy/alkyd painting, metallizing or hot-dip galvanizing, and add a corrosion allowance for wet service.
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 P285NH in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0477
How much does P285NH cost?
P285NH 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.
P285NH — frequently asked
What is P285NH used for?
P285NH is typically used for pressure vessel shells, boiler drums, heat exchanger plate and process equipment. In short: easy-welding vessel plate; normalized fine-grain toughness; available as forged shapes.
What is the yield strength of P285NH?
P285NH has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 81% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is P285NH easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Machines like normalized 1020/1518 C-Mn steel at roughly 60 % of AISI 1212; use sharp positive-rake carbide, moderate speeds and good chip control since the low-carbon structure is gummy.
Can P285NH be welded?
Yes — weldability is rated excellent (90/100). Excellent weldability by SMAW/SAW/GMAW with low-hydrogen consumables matching 285 MPa yield; preheat 100–150 °C for heavy sections and apply PWHT at 560–620 °C where the code requires it.
What surface finishes work on P285NH?
No anodizing; protect by blasting plus epoxy/alkyd painting, metallizing or hot-dip galvanizing, and add a corrosion allowance for wet service.
Can P285NH be formed, bent or molded?
Cold roll and press for shells and heads with generous bend radii (≥2 t); hot forming above ~900 °C should be followed by re-normalizing to restore the fine-grain properties.
What is the maximum service temperature of P285NH?
P285NH 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 P285NH-N and P285NH-NR?
N is the default condition — standard supply condition for pressure vessel shells, heads and forgings requiring 285 MPa minimum yield and 40 J at -20 °C. NR: plate rolled so that the final pass leaves a normalized-equivalent structure — same guaranteed properties as +N without a separate furnace cycle, cheaper on heavy plate. Yield strength is 320 MPa in N versus 330 MPa in NR.
How much does P285NH cost?
P285NH 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 of steels for pressure purposes: weldable fine grain steels, normalized — CEN (2017)
- EN 10222-4 — Steel forgings for pressure purposes: weldable fine grain steels with high proof strength — CEN (2017)
- EN 10027-2 — Designation systems for steels: numerical system (1.0477) — CEN (2015)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- EN 13445-3 — Unfired pressure vessels: design (material physical data annex) — CEN (2021)
- Mysteel / SMM (2026)
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.