Cr3C2 75-25NICR-HVOF
Matrix
75-25NICR-HVOF = cr3C2–25 % NiCr (80/20 NiCr binder), HVOF-sprayed coating
The standard high-temperature wear/erosion coating — best toughness and thermal-shock tolerance of the blends, for boiler tubes, valves and turbine hardware to ~870 °C.
Values for the 75-25NICR-HVOF condition
Other Cr3C2 tempers and conditions
Cr3C2 is listed in 4 conditions; see the grade overview at Cr3C2.
- 80-20NICR-HVOF
- 75-25NICR-HVOF
- PURE
- CERMET
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Cr3C2–20 % NiCr, HVOF-sprayed coating | Higher carbide fraction for more abrasive/erosive service where slightly lower coating toughness is acceptable. | — | 110 | 0.15 | 950 HV | 11 W/m·K |
75-25NICR-HVOFThis page Cr3C2–25 % NiCr (80/20 NiCr binder), HVOF-sprayed coating | The standard high-temperature wear/erosion coating — best toughness and thermal-shock tolerance of the blends, for boiler tubes, valves and turbine hardware to ~870 °C. | — | 120 | 0.2 | 900 HV | 10 W/m·K |
PUREDefault Cr3C2 pure | Choose for maximum hardness and oxidation resistance: spray powder feedstock, WC-Co grain inhibitor, hot-pressed test bodies. | — | 200 | 0 | 1,400 HV | 19 W/m·K |
Cr3C2–NiCr sintered cermet | Pick when a bulk corrosion/wear part (seal ring, nozzle, gauge) is needed rather than a coating — tougher and denser than monolithic Cr3C2. | — | — | — | 1,200 HV | 17 W/m·K |
What is Cr3C2 75-25NICR-HVOF?
Cr3C2 75-25NICR-HVOF is Cr3C2 in the 75-25NICR-HVOF condition — the standard high-temperature wear/erosion coating — best toughness and thermal-shock tolerance of the blends, for boiler tubes, valves and turbine hardware to ~870 °C. Cr3C2 75-25NICR-HVOF has a tensile strength of 120 MPa (17.4 ksi), stronger than 51% of ceramic grades. Elongation at break is 0.2% and the elastic modulus is 150 GPa (21.8 Msi). Cr3C2 75-25NICR-HVOF has a density of 6.9 g/cm³ (0.249 lb/in³), heavier than 71% of ceramic grades. It melts at 1,810°C (3,290 °F). PURE is the default condition FabDigit quotes; 75-25NICR-HVOF is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 0.2%, better than 81% of ceramic grades
Cr3C2 75-25NICR-HVOF properties
Typical room-temperature values for Cr3C2 75-25NICR-HVOF; 16 are specific to this condition. Other listed values are Cr3C2 reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical3
Cr3C2 75-25NICR-HVOF has a density of 6.9 g/cm³ (0.249 lb/in³), heavier than 71% of ceramic grades. It melts at 1,810°C (3,290 °F).
Mechanical13
Cr3C2 75-25NICR-HVOF has a tensile strength of 120 MPa (17.4 ksi), stronger than 51% of ceramic grades. Elongation at break is 0.2% and the elastic modulus is 150 GPa (21.8 Msi).
Thermal5
Cr3C2 75-25NICR-HVOF is rated for continuous service to 870°C (1,598 °F). It conducts heat at 10 W/m·K (5.78 BTU/hr·ft·°F), worse than 59% of ceramic grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical2
Cr3C2 75-25NICR-HVOF has an electrical resistivity of 2×10⁻⁶ Ω·m.
Chemical & Environmental2
Corrosion resistance is very good (80/100), better than 56% of ceramic grades.
Sustainability3
Producing a kilogram of Cr3C2 75-25NICR-HVOF takes about 95 MJ of energy and emits 7.5 kg of CO₂ — less than 57% of ceramic grades. Typical recycled content is 5%.
Manufacturability3
Cr3C2 75-25NICR-HVOF's machinability is not recommended (5/100, worse than 59% of ceramic grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Cr3C2 75-25NICR-HVOF
Is Cr3C2 easy to machine?
Bulk carbide and sprayed coatings are finished only by diamond grinding, lapping or EDM (the material is electrically conductive, so wire/sinker EDM works well).
Can Cr3C2 be welded?
Not weldable; coatings are applied by HVOF/HVAF/plasma spray and repaired by masking and re-spraying, PTA overlays use NiCr-Cr3C2 composite rod.
Can Cr3C2 be formed, bent or molded?
Powder route only — press-and-sinter or hot press/SPS at 1400–1800 °C; spray powders are made by agglomeration-sintering or blending with 20–25 % NiCr.
What surface finishes work on Cr3C2?
Coatings are ground and superfinished to Ra <0.2 µm for seal/rod service; sealing with epoxy or Cr-free sealants improves corrosion barrier at low temperature.
Cr3C2 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 |
|---|---|---|
| Cstoichiometric total carbon; free carbon typically <0.3 % | 13 – 13.6 | 13.3 |
| Fetypical powder impurity | ≤ 0.5 | 0.2 |
| Osurface oxygen on fine powders | ≤ 0.5 | 0.2 |
| Cr≈86.7 wt % nominal | balance | — |
Cr3C2 75-25NICR-HVOF — frequently asked
What is Cr3C2 75-25NICR-HVOF used for?
Cr3C2 75-25NICR-HVOF is typically used for thermal spray coatings, hot-gas erosion shields, boiler tube protection, wear-resistant hardfacing and valve seat coatings. In short: hot-wear thermal spray standard; oxidation-resistant to 1000 °C; tougher NiCr-bonded cermet.
What is the tensile strength of Cr3C2 75-25NICR-HVOF?
Cr3C2 75-25NICR-HVOF has a typical tensile strength of 120 MPa (17.4 ksi) — stronger than 51% of ceramic grades. Strength varies by condition: see the 4 listed tempers.
Is Cr3C2 75-25NICR-HVOF easy to machine?
Not especially — machinability is rated not recommended (5/100, worse than 59% of ceramic grades). Bulk carbide and sprayed coatings are finished only by diamond grinding, lapping or EDM (the material is electrically conductive, so wire/sinker EDM works well).
Can Cr3C2 75-25NICR-HVOF be welded?
Not weldable; coatings are applied by HVOF/HVAF/plasma spray and repaired by masking and re-spraying, PTA overlays use NiCr-Cr3C2 composite rod.
What surface finishes work on Cr3C2 75-25NICR-HVOF?
Coatings are ground and superfinished to Ra <0.2 µm for seal/rod service; sealing with epoxy or Cr-free sealants improves corrosion barrier at low temperature.
Can Cr3C2 75-25NICR-HVOF be formed, bent or molded?
Powder route only — press-and-sinter or hot press/SPS at 1400–1800 °C; spray powders are made by agglomeration-sintering or blending with 20–25 % NiCr.
What is the maximum service temperature of Cr3C2 75-25NICR-HVOF?
Cr3C2 75-25NICR-HVOF is rated for continuous use to about 870°C (1,598 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASM Handbook Vol. 4 / Engineered Materials Handbook — Ceramics and Glasses — ASM International (1991)
- Handbook of Refractory Carbides and Nitrides — Noyes/Elsevier (Pierson) (1996)
- Cr3C2-NiCr HVOF thermal spray powder datasheets — Oerlikon Metco / Praxair Surface Technologies (2022)
- GB/T 5314 / GB/T 26050 powder and thermal-spray material test practice — SAC (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.