Nickel Alloy G-NiCr28W
EN 2.4879
G-NiCr28W (2.4879) is a cast nickel-chromium alloy with a tungsten addition and relatively high carbon, developed for carburising and high-temperature furnace atmospheres.
Reference datasheet — G-NiCr28W 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 F condition
G-NiCr28W tempers and conditions
G-NiCr28W is supplied in 3 conditions, soft to hard. F 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 |
|---|---|---|---|---|---|---|
Solution annealed | Optional treatment used after repair welding or heavy machining to dissolve network carbides and relieve casting stresses, giving slightly higher ductility. | 220 | 430 | 10 | 175 HB | 1.5 % IACS |
FDefault As fabricated | Standard supply condition for furnace fixtures, trays and grids; used directly with no heat treatment. | 240 | 450 | 6 | 190 HB | 1.5 % IACS |
Centrifugally cast | Choose for radiant tubes, furnace rolls and sleeves where a denser, more directional structure raises creep and rupture strength. | 260 | 500 | 8 | 195 HB | 1.5 % IACS |
What is G-NiCr28W?
G-NiCr28W (2.4879) is a cast nickel-chromium alloy with a tungsten addition and relatively high carbon, developed for carburising and high-temperature furnace atmospheres. It carries the highest maximum service temperature in this cast group at 1150 °C, with 240 MPa yield, 450 MPa tensile and 190 HB as cast, and is supplied as sand, investment or centrifugal castings. Elongation is only 6 % and machinability scores 20, so hard interdendritic carbides usually have to be ground, and welding is a repair operation only. Use G-NiCr15 where ductility matters more than carburisation resistance. G-NiCr28W has a density of 8.1 g/cm³ (0.293 lb/in³), lighter than 80% of nickel alloy grades. It melts at 1,320°C (2,408 °F). G-NiCr28W has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 90% of nickel alloy grades. Elongation at break is 6% and the elastic modulus is 180 GPa (26.1 Msi).
What is G-NiCr28W used for?
- furnace rollers
- heat-treatment baskets
- radiant tube fittings
Advantages
- High service temperature — 1,150°C (2,102 °F), better than 95% of nickel alloy grades
Limitations
- Hard to polish — 45/100, worse than 99% of nickel alloy grades
- Low fracture toughness — 40 MPa·√m (36.4 ksi·√in), worse than 95% of nickel alloy grades
- Limited formability — 5/100, worse than 91% of nickel alloy grades
- Low strength — 240 MPa (34.8 ksi), worse than 90% of nickel alloy grades
- Limited ductility — 6%, worse than 90% of nickel alloy grades
G-NiCr28W properties
Typical room-temperature values for G-NiCr28W-F; bars are the position among nickel alloy grades.
Physical3
G-NiCr28W has a density of 8.1 g/cm³ (0.293 lb/in³), lighter than 80% of nickel alloy grades. It melts at 1,320°C (2,408 °F).
Mechanical15
G-NiCr28W has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 90% of nickel alloy grades. Elongation at break is 6% and the elastic modulus is 180 GPa (26.1 Msi).
Thermal5
G-NiCr28W is rated for continuous service to 1,150°C (2,102 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), better than 57% of nickel alloy grades. Thermal expansion is 15 µm/m·K (8.33 µin/in·°F).
Electrical3
G-NiCr28W conducts electricity at 1.5 % IACS, better than 59% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (75/100), worse than 63% of nickel alloy grades.
Sustainability4
Producing a kilogram of G-NiCr28W takes about 180 MJ of energy and emits 13 kg of CO₂ — more than 69% of nickel alloy grades. Typical recycled content is 45%.
Manufacturability8
G-NiCr28W's machinability is poor (20/100, better than 53% of nickel alloy grades); weldability fair (35/100); formability not recommended (5/100).
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 nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. G-NiCr28W is highlighted; hover a dot for its name, or open the interactive family chart.
Working with G-NiCr28W
Is G-NiCr28W easy to machine?
Difficult: use rigid setups, positive-rake carbide or ceramic inserts, low speed with heavy feed, flood coolant; grind rather than turn where hard interdendritic carbides dominate.
Can G-NiCr28W be welded?
Repair welding only, with matched Ni-Cr-W or Ni-Cr filler, high preheat (200–300 °C) and slow cooling; hot-crack sensitive because of high carbon.
Can G-NiCr28W be formed, bent or molded?
Not cold formable — supplied as sand, investment or centrifugal castings; design generous fillets and uniform sections to avoid hot tears.
G-NiCr28W 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 |
|---|---|---|
| Chigh C for carbide strengthening | 0.35 – 0.55 | 0.45 |
| Siaids oxidation/carburization resistance | 1 – 2.5 | 1.6 |
| Mn | ≤ 2 | 1 |
| Cr | 26 – 30 | 28 |
| Wsolid-solution / carbide strengthener | 4 – 6 | 5 |
| Feresidual | ≤ 3 | 1.5 |
| P | ≤ 0.04 | |
| S | ≤ 0.03 | |
| Nibalance, approx. 60–66 % | balance |
What surface finishes work on G-NiCr28W?
Shot blast or pickle to remove casting scale; no anodizing, coatings are rarely needed since the Cr₂O₃ scale is self-protecting.
Surface treatments FabDigit runs on nickel alloy 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).
Plating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy G-NiCr28W in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 2.4879
How much does G-NiCr28W cost?
G-NiCr28W is a high-cost nickel alloy ($$$$), pricier than about 78% 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.
G-NiCr28W — frequently asked
What is G-NiCr28W used for?
G-NiCr28W is typically used for furnace rollers, heat-treatment baskets and radiant tube fittings. In short: carburisation-resistant cast Ni-Cr; highest service temperature, 1150 °C; grinds better than it turns.
What is the yield strength of G-NiCr28W?
G-NiCr28W has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 90% of nickel alloy grades. Strength varies by condition: see the 3 listed tempers.
Is G-NiCr28W easy to machine?
Not especially — machinability is rated poor (20/100, better than 53% of nickel alloy grades). Difficult: use rigid setups, positive-rake carbide or ceramic inserts, low speed with heavy feed, flood coolant; grind rather than turn where hard interdendritic carbides dominate.
Can G-NiCr28W be welded?
With care — weldability is rated fair (35/100). Repair welding only, with matched Ni-Cr-W or Ni-Cr filler, high preheat (200–300 °C) and slow cooling; hot-crack sensitive because of high carbon.
What surface finishes work on G-NiCr28W?
Shot blast or pickle to remove casting scale; no anodizing, coatings are rarely needed since the Cr₂O₃ scale is self-protecting.
Can G-NiCr28W be formed, bent or molded?
Not cold formable — supplied as sand, investment or centrifugal castings; design generous fillets and uniform sections to avoid hot tears.
What is the maximum service temperature of G-NiCr28W?
G-NiCr28W is rated for continuous use to about 1,150°C (2,102 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between G-NiCr28W-F and G-NiCr28W-CF?
F is the default condition — standard supply condition for furnace fixtures, trays and grids; used directly with no heat treatment. CF: choose for radiant tubes, furnace rolls and sleeves where a denser, more directional structure raises creep and rupture strength. Yield strength is 240 MPa in F versus 260 MPa in CF.
How much does G-NiCr28W cost?
G-NiCr28W is a high-cost nickel alloy ($$$$), pricier than about 78% 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
- DIN 17465 — Hitzebeständiger Stahlguss / heat-resistant cast alloys (incl. material 2.4879) — DIN (1990)
- EN 10295 — Heat resistant steel castings — CEN (2002)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys (heat-resistant castings) — ASM International (1990)
- ASM Handbook Vol.15 — Casting — ASM International (2008)
- Heat-resistant alloy castings for furnace fixtures (Ni-Cr-W grades) — European/Chinese heat-resistant foundries (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.