C5 YT5
Grade · default condition
GB YT5 · ISO P40
YT5 = yT5 / P40
Pick for heavy, interrupted or scaly roughing cuts on carbon and alloy steel where toughness matters more than wear life.
Values for the YT5 condition
Other C5 tempers and conditions
C5 is listed in 2 conditions; see the grade overview at C5.
- YT5
- P30
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
YT5DefaultThis page YT5 / P40 | Pick for heavy, interrupted or scaly roughing cuts on carbon and alloy steel where toughness matters more than wear life. | — | — | — | 1,400 HV | 25 W/m·K |
Leaner binder / higher TiC, semi-roughing steel grade | Pick when the cut is more continuous and crater/edge wear rather than chipping limits tool life. | — | — | — | 1,520 HV | 21 W/m·K |
What is C5 YT5?
C5 YT5 is C5 in the YT5 grade — pick for heavy, interrupted or scaly roughing cuts on carbon and alloy steel where toughness matters more than wear life. C5 YT5 has a tensile strength of 900 MPa (131 ksi), stronger than 83% of ceramic grades. Elongation at break is 0% and the elastic modulus is 520 GPa (75.4 Msi). C5 YT5 has a density of 12.9 g/cm³ (0.466 lb/in³), heavier than 84% of ceramic grades. It melts at 1,320°C (2,408 °F).
Advantages
- Tough — resists crack growth — 12 MPa·√m (10.9 ksi·√in), better than 93% of ceramic grades
- Stiff — 520 GPa (75.4 Msi), better than 81% of ceramic grades
- Polishes to a fine finish — 90/100, better than 78% of ceramic grades
Limitations
- Needs corrosion protection — 40/100, worse than 96% of ceramic grades
- High embodied carbon — 30 kg CO₂/kg, worse than 91% of ceramic grades
- Heavy — 12.9 g/cm³ (0.466 lb/in³), worse than 84% of ceramic grades
C5 YT5 properties
Typical room-temperature values for C5 YT5; 10 are specific to this condition. Other listed values are C5 reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical3
C5 YT5 has a density of 12.9 g/cm³ (0.466 lb/in³), heavier than 84% of ceramic grades. It melts at 1,320°C (2,408 °F).
Mechanical12
C5 YT5 has a tensile strength of 900 MPa (131 ksi), stronger than 83% of ceramic grades. Elongation at break is 0% and the elastic modulus is 520 GPa (75.4 Msi).
Thermal5
C5 YT5 is rated for continuous service to 900°C (1,652 °F). It conducts heat at 25 W/m·K (14.4 BTU/hr·ft·°F), better than 55% of ceramic grades. Thermal expansion is 6.5 µm/m·K (3.61 µin/in·°F).
Electrical2
C5 YT5 has an electrical resistivity of 3.5×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is fair (40/100), worse than 96% of ceramic grades.
Sustainability4
Producing a kilogram of C5 YT5 takes about 400 MJ of energy and emits 30 kg of CO₂ — more than 88% of ceramic grades. Typical recycled content is 30%.
Manufacturability3
C5 YT5's machinability is not recommended (3/100, worse than 95% of ceramic grades).
Common Calculations4
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C5 YT5
Is C5 easy to machine?
Shape by diamond grinding, wire/sinker EDM or green-state pressing; no conventional cutting is possible.
Can C5 be welded?
Not fusion weldable — join by vacuum brazing with Ag–Cu (e.g. BAg-3) or Cu–Mn fillers, keeping temperature below ~900 °C to protect the binder.
Can C5 be formed, bent or molded?
Net-shape by uniaxial/CIP pressing or extrusion of powder plus paraffin binder, dewax, then vacuum or sinter-HIP at ~1400–1500 °C with 15–25 % linear shrinkage.
What surface finishes work on C5?
Diamond lap/polish for mirror edges; PVD or CVD hard coatings are standard, and electroplating is rarely used because of poor adhesion to the carbide skeleton.
C5 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 |
|---|---|---|
| Cometallic binder; drives toughness | 8 – 11 | 9.5 |
| TiCcubic carbide for crater-wear resistance | 4 – 6 | 5 |
| TaC+NbCoptional, grain refinement / thermal shock | 0 – 2 | 0.5 |
| WCbalance, typically 83–87 % | balance | — |
C5 YT5 — frequently asked
What is C5 YT5 used for?
C5 YT5 is typically used for steel roughing inserts, heavy interrupted-cut turning tools, face-milling inserts for steel, brazed tips for steel roughing, bar peeling tool tips and forging-scale skin turning inserts. In short: P-group steel roughing grade; tiC/TaC crater resistance; 900 °C service ceiling.
What is the tensile strength of C5 YT5?
C5 YT5 has a typical tensile strength of 900 MPa (131 ksi) — stronger than 83% of ceramic grades. Strength varies by condition: see the 2 listed tempers.
Is C5 YT5 easy to machine?
Not especially — machinability is rated not recommended (3/100, worse than 95% of ceramic grades). Shape by diamond grinding, wire/sinker EDM or green-state pressing; no conventional cutting is possible.
Can C5 YT5 be welded?
Not fusion weldable — join by vacuum brazing with Ag–Cu (e.g. BAg-3) or Cu–Mn fillers, keeping temperature below ~900 °C to protect the binder.
What surface finishes work on C5 YT5?
Diamond lap/polish for mirror edges; PVD or CVD hard coatings are standard, and electroplating is rarely used because of poor adhesion to the carbide skeleton.
Can C5 YT5 be formed, bent or molded?
Net-shape by uniaxial/CIP pressing or extrusion of powder plus paraffin binder, dewax, then vacuum or sinter-HIP at ~1400–1500 °C with 15–25 % linear shrinkage.
What is the maximum service temperature of C5 YT5?
C5 YT5 is rated for continuous use to about 900°C (1,652 °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 (P/M/K groups) — ISO (2012)
- ASTM B276 — Apparent Porosity in Cemented Carbides — ASTM (2020)
- ASM Handbook Vol.2 / Vol.16 — cemented carbides and machining — ASM International (1990)
- Cemented carbide grade property tables — Sandvik Hard Materials / Kennametal (2022)
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.