YG6X FG
Grade · default condition
ISO K05
FG = fine grain (0.8–1.2 µm WC), vacuum sintered
Standard commercial YG6X: general finishing tooling and wear parts where edge sharpness matters more than impact toughness.
Values for the FG condition
Other YG6X tempers and conditions
YG6X is listed in 3 conditions; see the grade overview at YG6X.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Sinter-HIP consolidated | Choose when maximum transverse rupture strength and freedom from A/B-type porosity are needed, e.g. thin cutting edges, punches and micro-drill blanks. | — | 1,500 | 0 | 1,780 HV | 80 W/m·K |
FGDefaultThis page Fine grain (0.8–1.2 µm WC), vacuum sintered | Standard commercial YG6X: general finishing tooling and wear parts where edge sharpness matters more than impact toughness. | — | — | — | 1,750 HV | 79 W/m·K |
Ultrafine / submicron grain | Pick for micro-tools, PCB drills and razor-sharp finishing edges needing the highest hardness at 6% Co; least tolerant of impact. | — | — | — | 1,950 HV | 70 W/m·K |
What is YG6X FG?
YG6X FG is YG6X in the FG grade — standard commercial YG6X: general finishing tooling and wear parts where edge sharpness matters more than impact toughness. The elastic modulus is 630 GPa (91.4 Msi). YG6X FG has a density of 14.9 g/cm³ (0.538 lb/in³), heavier than 96% of ceramic grades.
Advantages
- Stiff — 630 GPa (91.4 Msi), better than 95% of ceramic grades
- Tough — resists crack growth — 8.5 MPa·√m (7.74 ksi·√in), better than 79% of ceramic grades
- Conducts heat well — 79 W/m·K (45.6 BTU/hr·ft·°F), better than 75% of ceramic grades
Limitations
- Heavy — 14.9 g/cm³ (0.538 lb/in³), worse than 96% of ceramic grades
- Needs corrosion protection — 55/100, worse than 77% of ceramic grades
YG6X FG properties
Typical room-temperature values for YG6X FG; 10 are specific to this condition. Other listed values are YG6X reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical2
YG6X FG has a density of 14.9 g/cm³ (0.538 lb/in³), heavier than 96% of ceramic grades.
Mechanical9
The elastic modulus is 630 GPa (91.4 Msi).
Thermal5
YG6X FG is rated for continuous service to 800°C (1,472 °F). It conducts heat at 79 W/m·K (45.6 BTU/hr·ft·°F), better than 75% of ceramic grades. Thermal expansion is 4.7 µm/m·K (2.61 µin/in·°F).
Electrical2
YG6X FG has an electrical resistivity of 2×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is good (55/100), worse than 77% of ceramic grades.
Sustainability4
Producing a kilogram of YG6X FG takes about 300 MJ of energy and emits 22 kg of CO₂ — more than 74% of ceramic grades. Typical recycled content is 30%.
Manufacturability3
YG6X FG's machinability is not recommended (5/100, worse than 59% of ceramic grades).
Common Calculations2
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with YG6X FG
Is YG6X easy to machine?
Green-state pressing/extrusion then diamond grinding, wire/sinker EDM or laser after sintering — no conventional cutting; keep grinding wheels cool to avoid edge micro-cracks.
Can YG6X be welded?
Not fusion weldable; join to steel by silver/Cu-based vacuum brazing (e.g. BAg-24, 700–900 °C) with a shim to absorb the CTE mismatch, or by braze-clad shrink fit.
Can YG6X be formed, bent or molded?
Net-shape by uniaxial die pressing, CIP or extrusion of PEG-bonded powder, dewaxed and vacuum/sinter-HIP fired at ~1400–1450 °C with ~18–20% linear shrinkage.
What surface finishes work on YG6X?
Diamond lapping/polishing to Ra<0.05 µm; PVD TiAlN/AlTiN or CVD TiCN-Al2O3 coating after Co-etch pretreatment; do not electroplate acidic baths that leach cobalt.
YG6X 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 |
|---|---|---|
| Cobinder phase | 5.5 – 6.5 | 6 |
| VCgrain-growth inhibitor | 0.1 – 0.5 | 0.3 |
| TaCgrain refiner / thermal-shock aid; NbC may substitute | 0 – 0.6 | 0.3 |
| Cr3C2optional inhibitor, some producers | 0 – 0.4 | 0.2 |
| WCfine-grain tungsten carbide, 0.8–1.2 µm | balance | — |
YG6X FG — frequently asked
What is YG6X FG used for?
YG6X FG is typically used for finish machining cast iron, reamers, small-diameter drills and precision cutting edges. In short: fine-grain finishing grade; sharper, more wear-resistant than YG6; higher rated temperature.
Is YG6X FG easy to machine?
Not especially — machinability is rated not recommended (5/100, worse than 59% of ceramic grades). Green-state pressing/extrusion then diamond grinding, wire/sinker EDM or laser after sintering — no conventional cutting; keep grinding wheels cool to avoid edge micro-cracks.
Can YG6X FG be welded?
Not fusion weldable; join to steel by silver/Cu-based vacuum brazing (e.g. BAg-24, 700–900 °C) with a shim to absorb the CTE mismatch, or by braze-clad shrink fit.
What surface finishes work on YG6X FG?
Diamond lapping/polishing to Ra<0.05 µm; PVD TiAlN/AlTiN or CVD TiCN-Al2O3 coating after Co-etch pretreatment; do not electroplate acidic baths that leach cobalt.
Can YG6X FG be formed, bent or molded?
Net-shape by uniaxial die pressing, CIP or extrusion of PEG-bonded powder, dewaxed and vacuum/sinter-HIP fired at ~1400–1450 °C with ~18–20% linear shrinkage.
What is the maximum service temperature of YG6X FG?
YG6X FG is rated for continuous use to about 800°C (1,472 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ISO 513 Classification and application of hard cutting materials — ISO (2012)
- ASM Handbook Vol. 2 / Engineered Materials Handbook Vol. 4 — Cemented Carbides — ASM International (1991)
- Cemented carbide grade tables (WC-6Co fine grain) — Zhuzhou Cemented Carbide / Xiamen Golden Egret / Sandvik Hard Materials (2023)
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.