Steel T8 vs W6Mo5Cr4V2
Steel · grade comparison
Steel T8 and W6Mo5Cr4V2 are both steel grades, both tool steel. T8 is the stronger of the two: tensile strength 900 MPa (131 ksi) against 850 MPa (123 ksi) for W6Mo5Cr4V2, about 6% more. T8 is the more ductile: elongation 15% versus 12% for W6Mo5Cr4V2. W6Mo5Cr4V2 is lighter (8.16 g/cm³ vs 8.6 g/cm³ for T8) and W6Mo5Cr4V2 runs hotter in service (500°C vs 400°C continuous).
T8Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
W6Mo5Cr4V2Choose it when weight is the constraint, or when the part sees heat.
T8 vs W6Mo5Cr4V2: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Reduction in Area
Compressive Strength
Charpy V-Notch Impact (RT)
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Rockwell C
Same in both: Yield Strength (0.2% offset) 570 MPa82.7 ksi · Hardness, Brinell 240 HB · Hardness, Rockwell B 99 HRB · Hardness, Vickers 250 HV
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 420 J/kg·K0.1 BTU/lb·°F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.1 % IACS · Electrical Resistivity 5.5×10⁻⁷ Ω·m21.7 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 18 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Same in both: Brazeability / Solderability 55 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 90 L/kg10.8 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | T8 | W6Mo5Cr4V2 |
|---|---|---|
| Default condition | Annealed | Annealed |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | 0.8 mm | 0.8 mm |
| Best machined surface | Ra 1.6 µm | Ra 1.6 µm |
Both are offered for CNC machining. Both take the same 38 finishes: AlCrN, AlTiN, Black Oxide, CVD Al2O3, CVD TiCN, CVD TiN, Cerakote, Chrome Plating, Copper Plating, CrN, DLC, E-Coating and 26 more.
T8 vs W6Mo5Cr4V2 — frequently asked
Is T8 stronger than W6Mo5Cr4V2?
Yes. T8 has a typical tensile strength of 900 MPa (131 ksi) against 850 MPa (123 ksi) for W6Mo5Cr4V2 — about 6% more.
Which is cheaper, T8 or W6Mo5Cr4V2?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, T8 or W6Mo5Cr4V2?
W6Mo5Cr4V2, by a small margin. Both rate fair for machinability — 40/100 against 35/100 for T8.
Ready to make it?
Upload a CAD file and FabDigit prices the part in T8 and W6Mo5Cr4V2 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.