Steel GP280GH
EN 1.0625
GP280GH (1.0625) is a higher-strength carbon steel casting grade for pressure-retaining parts at elevated temperature, sitting one step above GP240GH in the same EN series.
Reference datasheet — GP280GH 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 +NT condition
GP280GH tempers and conditions
GP280GH is supplied in 3 conditions, soft to hard. +NT is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Normalized | Basic normalized condition for thin-walled, non-critical castings where a tempering step is not required. | 300 | 530 | 23 | 160 HB | 10 % IACS |
+NTDefault Normalized and tempered | Standard supply condition for pressure-retaining valve and pump castings; balanced strength, ductility and stress relief. | 310 | 540 | 24 | 165 HB | — |
Quenched and tempered | Choose for heavy-section castings needing uniform properties through wall thickness and higher notch toughness. | 345 | 570 | 24 | 180 HB | — |
What is GP280GH?
GP280GH (1.0625) is a higher-strength carbon steel casting grade for pressure-retaining parts at elevated temperature, sitting one step above GP240GH in the same EN series. Default-condition properties are 310 MPa yield, 540 MPa tensile, 24% elongation and about 165 HB, with a 425 °C service limit and supply in +N, +NT or +QT condition as sand or investment castings. It keeps good weldability (score 78, CE ≈ 0.45) while raising allowable stress, which reduces wall thickness on valve and fitting bodies. Corrosion resistance is essentially nil (score 10), so coatings or plated sealing faces are required; GP240GH is the alternative when maximum weldability matters more than strength. GP280GH has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). GP280GH has a yield strength of 310 MPa (45 ksi) and a tensile strength of 540 MPa (78.3 ksi) — weaker than 83% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
What is GP280GH used for?
- High-pressure valve bodies
- Steam piping fittings
- Pressure vessel castings
Advantages
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Tough — resists crack growth — 120 MPa·√m (109.2 ksi·√in), better than 81% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades
- Readily welded — 78/100, better than 78% of steel grades
Limitations
- Low strength — 310 MPa (45 ksi), worse than 83% of steel grades
- Limited formability — 20/100, worse than 80% of steel grades
GP280GH properties
Typical room-temperature values for GP280GH-+NT; bars are the position among steel grades.
Physical3
GP280GH has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
GP280GH has a yield strength of 310 MPa (45 ksi) and a tensile strength of 540 MPa (78.3 ksi) — weaker than 83% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
GP280GH is rated for continuous service to 425°C (797 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 11.9 µm/m·K (6.61 µin/in·°F).
Electrical3
GP280GH conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of GP280GH takes about 25 MJ of energy and emits 2.2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 80%.
Manufacturability7
GP280GH's machinability is good (60/100, better than 83% of steel grades); weldability very good (78/100); formability poor (20/100).
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. GP280GH is highlighted; hover a dot for its name, or open the interactive family chart.
Working with GP280GH
Is GP280GH easy to machine?
Machines like normalized 1020–1025 wrought steel; watch for hard skin, sand inclusions and shrinkage porosity at the casting surface — take a full first cut with tough carbide inserts.
Can GP280GH be welded?
Readily weldable (CE ≈ 0.45) by SMAW/GTAW/SAW with low-hydrogen consumables; preheat 100–150 °C on heavy sections and PWHT 580–620 °C for pressure-boundary repairs.
Can GP280GH be formed, bent or molded?
Supplied as sand or investment castings; use adequate risering and chills to avoid centreline shrinkage, then normalize/temper the whole casting.
GP280GH 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 |
|---|---|---|
| CEN 10213-2 | 0.18 – 0.25 | 0.22 |
| Si | ≤ 0.6 | 0.4 |
| Mn | 0.8 – 1.2 | 1 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Crresidual | ≤ 0.3 | 0.1 |
| Moresidual | ≤ 0.12 | 0.05 |
| Niresidual | ≤ 0.4 | 0.15 |
| Curesidual | ≤ 0.3 | 0.15 |
| Vresidual; total residuals ≤ 1.00 % | ≤ 0.03 | 0.01 |
| Fe | balance |
What surface finishes work on GP280GH?
No anodizing; protect with shot blast plus epoxy/zinc-rich primer, electroless nickel or hard-chrome on sealing faces for corrosive 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 GP280GH in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0625
How much does GP280GH cost?
GP280GH is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
GP280GH — frequently asked
What is GP280GH used for?
GP280GH is typically used for high-pressure valve bodies, steam piping fittings and pressure vessel castings. In short: higher-strength WCB alternative; weldable pressure-boundary casting; thinner walls than GP240GH.
What is the yield strength of GP280GH?
GP280GH has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 540 MPa (78.3 ksi) — weaker than 83% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is GP280GH easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Machines like normalized 1020–1025 wrought steel; watch for hard skin, sand inclusions and shrinkage porosity at the casting surface — take a full first cut with tough carbide inserts.
Can GP280GH be welded?
Yes — weldability is rated very good (78/100). Readily weldable (CE ≈ 0.45) by SMAW/GTAW/SAW with low-hydrogen consumables; preheat 100–150 °C on heavy sections and PWHT 580–620 °C for pressure-boundary repairs.
What surface finishes work on GP280GH?
No anodizing; protect with shot blast plus epoxy/zinc-rich primer, electroless nickel or hard-chrome on sealing faces for corrosive service.
Can GP280GH be formed, bent or molded?
Supplied as sand or investment castings; use adequate risering and chills to avoid centreline shrinkage, then normalize/temper the whole casting.
What is the maximum service temperature of GP280GH?
GP280GH is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does GP280GH cost?
GP280GH is a standard-cost steel ($$), cheaper than about 71% 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 10213 — Steel castings for pressure purposes — CEN (2016)
- EN 10027-2 / material number 1.0625 — CEN (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
- ASTM A216/A216M (WCB, comparable grade) — ASTM (2021)
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.