Steel W18Cr4V Annealed vs W18Cr4V HT 64-66 HRC
Steel · W18Cr4V temper comparison
W18Cr4V Annealed and W18Cr4V HT 64-66 HRC are two conditions of the same steel grade, W18Cr4V: Annealed versus HT 64-66 HRC (hardened & triple tempered to 64–66 HRC). The chemistry is identical, so every difference below comes from the condition. W18Cr4V HT 64-66 HRC is the stronger of the two: tensile strength 1,900 MPa (276 ksi) against 900 MPa (131 ksi) for W18Cr4V Annealed, about 111% more. In exchange, W18Cr4V Annealed is the more ductile: elongation 10% versus 0.3% for W18Cr4V HT 64-66 HRC, and W18Cr4V HT 64-66 HRC is harder (65 HRC vs 22 HRC). W18Cr4V HT 64-66 HRC runs hotter in service (600°C vs 350°C continuous). On the shop floor, W18Cr4V Annealed machines more easily (fair vs not recommended).
W18Cr4V AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
W18Cr4V HT 64-66 HRCChoose it when strength drives the design, or when the part sees heat.
W18Cr4V Annealed vs W18Cr4V HT 64-66 HRC: 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.
W18Cr4V AnnealedW18Cr4V HT 64-66 HRC
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 217 GPa31.5 Msi · Shear Modulus 85 GPa12.3 Msi · Bulk Modulus 168 GPa24.4 Msi · Poisson's Ratio 0.29 · Yield Strength (0.2% offset) 550 MPa79.8 ksi · Reduction in Area 20% · Hardness, Brinell 240 HB · Hardness, Rockwell B 99 HRB
Physical
Density and transition temperatures.
Same in both: Density 8.67 g/cm³0.31 lb/in³ · Melting Point (Solidus) 1,330°C2,426 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 24 W/m·K13.9 BTU/hr·ft·°F · Specific Heat Capacity 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11 µm/m·K6.1 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -60°C-76 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.7 % IACS · Electrical Resistivity 4.6×10⁻⁷ Ω·m18.1 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.55 V · Corrosion Resistance 20 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 30% · Weldability 20 / 100 · Castability 20 / 100 · Brazeability / Solderability 55 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 60 MJ/kg25,795 BTU/lb · Embodied Carbon (primary production) 4.5 kg CO₂/kg · Embodied Water 120 L/kg14.4 gal/lb · Typical Recycled Content 40%
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.
W18Cr4V Annealed vs W18Cr4V HT 64-66 HRC — frequently asked
Is W18Cr4V HT 64-66 HRC stronger than W18Cr4V Annealed?
Yes. W18Cr4V HT 64-66 HRC has a typical tensile strength of 1,900 MPa (276 ksi) against 900 MPa (131 ksi) for W18Cr4V Annealed — about 111% more.
Which condition does FabDigit quote by default, Annealed or HT 64-66 HRC?
Annealed is the default W18Cr4V condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, W18Cr4V Annealed or W18Cr4V HT 64-66 HRC?
W18Cr4V Annealed. Its machinability rates fair (35/100) against not recommended (4/100) for W18Cr4V HT 64-66 HRC.
Ready to make it?
Upload a CAD file and FabDigit prices the part in W18Cr4V Annealed and W18Cr4V HT 64-66 HRC 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.