Steel P280GH
EN P280GH
P280GH is a non-alloy pressure vessel and boiler steel to the EN 10028-2 family (1.0426), broadly comparable to ASTM A515 Gr.70 and Q345R, normally supplied normalized as plate, forgings and heavy-wall fittings.
Reference datasheet — P280GH 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
P280GH tempers and conditions
P280GH is supplied in 6 conditions, soft to hard. N is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Softest state, used between cold-drawing passes or where maximum cold formability and easy machining matter more than strength. | 250 | 420 | 32 | 120 HB | 10 % IACS |
As-rolled / hot finished | Intermediate hot-finished stock before normalizing; acceptable only for non-pressure or further-processed parts. | 305 | 500 | 23 | 150 HB | 10 % IACS |
normalized and tempered | Choose when residual stresses must be lowered and toughness scatter tightened, e.g. thick-wall headers after hot forming. | 310 | 460 | 27 | 138 HB | 10 % IACS |
NDefault Normalized | Default stocked condition: fine ferrite-pearlite grain, meets full EN 10216-2 room- and elevated-temperature property set. | 320 | 480 | 26 | 145 HB | — |
normalizing rolled (thermomechanically finished, plate/strip) | Plate/coil route giving properties equivalent to +N without a separate furnace cycle; economical for welded pressure tube and vessel shells. | 330 | 490 | 25 | 148 HB | 10 % IACS |
cold drawn / cold finished (hard, as-drawn) | Cold-drawn precision tube with tight tolerances and raised strength; must be re-normalized (+N) before use as pressure tube under EN 10216-2. | 460 | 570 | 12 | 175 HB | 9.5 % IACS |
What is P280GH?
P280GH is a non-alloy pressure vessel and boiler steel to the EN 10028-2 family (1.0426), broadly comparable to ASTM A515 Gr.70 and Q345R, normally supplied normalized as plate, forgings and heavy-wall fittings. It provides 320 MPa yield, 480 MPa tensile, 26 % elongation and 145 HB (78 HRB) with service to about 450 °C, which is why it is used for vessel shells, steam drums and flanges under pressure equipment codes. Weldability is good (CEV ≈ 0.40–0.45), but heavy walls need preheat and often PWHT, and the steel has no corrosion resistance. Where higher creep strength is required, move to a Mo-alloyed grade. P280GH 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). P280GH has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 81% of steel grades. Elongation at break is 26% and the elastic modulus is 212 GPa (30.7 Msi).
What is P280GH used for?
- high-pressure vessel shells
- boiler components
- heavy-wall pipe flanges
- steam drums
Advantages
- Readily welded — 90/100, better than 90% of steel grades
- High service temperature — 450°C (842 °F), better than 86% of steel grades
- Forms and bends easily — 70/100, better than 86% of steel grades
- High electrical conductivity — 10 % IACS, 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
- Low strength — 320 MPa (46.4 ksi), worse than 81% of steel grades
P280GH properties
Typical room-temperature values for P280GH-N; bars are the position among steel grades.
Physical3
P280GH 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
P280GH has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 81% of steel grades. Elongation at break is 26% and the elastic modulus is 212 GPa (30.7 Msi).
Thermal6
P280GH is rated for continuous service to 450°C (842 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
P280GH conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of P280GH takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
P280GH'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. P280GH is highlighted; hover a dot for its name, or open the interactive family chart.
Working with P280GH
Is P280GH easy to machine?
Machines like normalized 1020/1518 carbon steel — free chipping with carbide at 150–250 m/min, but gummy in the annealed state; use chip breakers and adequate coolant.
Can P280GH be welded?
Excellent weldability (CEV ≈ 0.40–0.45); SMAW/GTAW/SAW with matching low-hydrogen consumables, preheat 100–150 °C for wall >30 mm, PWHT per EN 13480/EN 13445 when required.
Can P280GH be formed, bent or molded?
Good cold bending and tube bending (min bend radius ≈ 3D); hot forming 850–1050 °C followed by re-normalizing at 880–920 °C to restore certified properties.
P280GH 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 | ≤ 0.2 | 0.17 |
| Si | 0.15 – 0.35 | 0.25 |
| Mn | 0.8 – 1.4 | 1.1 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.03 |
| Cr | ≤ 0.3 | 0.08 |
| Cu | ≤ 0.3 | 0.1 |
| Mo | ≤ 0.08 | 0.02 |
| Ni | ≤ 0.3 | 0.1 |
| Nb | ≤ 0.04 | 0.01 |
| Ti | ≤ 0.04 | 0.01 |
| V | ≤ 0.03 | 0.01 |
| Cr+Cu+Mo+Nisum limit per EN 10216-2 | ≤ 0.7 | |
| Fe | balance |
What surface finishes work on P280GH?
Not anodizable — protect with shop primer, epoxy/high-temperature silicone paint, phosphating or hot-dip galvanizing; internal boiler surfaces rely on controlled water chemistry and magnetite films.
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 P280GH in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0426
- Similar grades
- Q345RA515 Gr.70
How much does P280GH cost?
P280GH 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.
P280GH — frequently asked
What is P280GH used for?
P280GH is typically used for high-pressure vessel shells, boiler components, heavy-wall pipe flanges and steam drums. In short: higher-strength boiler plate; rated to 450 °C; weldable pressure vessel grade.
What is the yield strength of P280GH?
P280GH has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 81% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is P280GH easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Machines like normalized 1020/1518 carbon steel — free chipping with carbide at 150–250 m/min, but gummy in the annealed state; use chip breakers and adequate coolant.
Can P280GH be welded?
Yes — weldability is rated excellent (90/100). Excellent weldability (CEV ≈ 0.40–0.45); SMAW/GTAW/SAW with matching low-hydrogen consumables, preheat 100–150 °C for wall >30 mm, PWHT per EN 13480/EN 13445 when required.
What surface finishes work on P280GH?
Not anodizable — protect with shop primer, epoxy/high-temperature silicone paint, phosphating or hot-dip galvanizing; internal boiler surfaces rely on controlled water chemistry and magnetite films.
Can P280GH be formed, bent or molded?
Good cold bending and tube bending (min bend radius ≈ 3D); hot forming 850–1050 °C followed by re-normalizing at 880–920 °C to restore certified properties.
What is the maximum service temperature of P280GH?
P280GH is rated for continuous use to about 450°C (842 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between P280GH-N and P280GH-C?
N is the default condition — default stocked condition: fine ferrite-pearlite grain, meets full EN 10216-2 room- and elevated-temperature property set. C: cold-drawn precision tube with tight tolerances and raised strength; must be re-normalized (+N) before use as pressure tube under EN 10216-2. Yield strength is 320 MPa in N versus 460 MPa in C.
How much does P280GH cost?
P280GH 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 10216-2 — Seamless steel tubes for pressure purposes, non-alloy and alloy steels with specified elevated temperature properties — CEN (2020)
- EN 10217-2 — Welded steel tubes for pressure purposes with specified elevated temperature properties — CEN (2019)
- EN 10028-2 — Flat products of steels for pressure purposes: alloy steels with specified elevated temperature properties — CEN (2017)
- EN 10027-2 / material number 1.0426 — CEN (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
- GB/T 5310 ( , 20G/Q345R comparison grades) — SAC (2017)
- Mysteel / SMM (2025)
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.