Refractory Metal S-65C-ANN vs S-65C-VHP
Refractory Metal · S-65C temper comparison
S-65C-ANN and S-65C-VHP are two conditions of the same refractory metal grade, S-65C: ANN (annealed) versus VHP (vacuum hot pressed block). The chemistry is identical, so every difference below comes from the condition. S-65C-VHP is the stronger of the two: yield strength 241 MPa (35 ksi) against 225 MPa (32.6 ksi) for S-65C-ANN, about 7% more. In exchange, S-65C-ANN is the more ductile: elongation 5.5% versus 4.5% for S-65C-VHP, and S-65C-VHP is harder (90 HB vs 85 HB).
S-65C-ANNChoose it when the part is bent, formed or impact-loaded.
S-65C-VHPChoose it when strength drives the design.
S-65C-ANN vs S-65C-VHP: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all refractory metal 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 refractory metal 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 303 GPa43.9 Msi · Shear Modulus 142 GPa20.6 Msi · Bulk Modulus 117 GPa17 Msi · Poisson's Ratio 0.07
Physical
Density and transition temperatures.
Same in both: Density 1.85 g/cm³0.07 lb/in³ · Melting Point (Solidus) 1,287°C2,349 °F · Liquidus Temperature 1,287°C2,349 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 1,885 J/kg·K0.45 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.3 µm/m·K6.3 µin/in·°F · Latent Heat of Fusion 1,355 J/g583 BTU/lb · Max Service Temperature (continuous) 500°C932 °F · Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.98 V · Corrosion Resistance 40 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,500 MJ/kg644,885 BTU/lb · Embodied Carbon (primary production) 95 kg CO₂/kg · Typical Recycled Content 15%
Strength versus weight
Yield strength against density for every refractory metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
S-65C-ANN vs S-65C-VHP — frequently asked
Is S-65C-VHP stronger than S-65C-ANN?
Yes. S-65C-VHP has a typical yield strength of 241 MPa (35 ksi) against 225 MPa (32.6 ksi) for S-65C-ANN — about 7% more. Tensile strength is 324 MPa (47 ksi) vs 310 MPa (45 ksi).
Which condition does FabDigit quote by default, ANN or VHP?
VHP is the default S-65C 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, S-65C-ANN or S-65C-VHP?
S-65C-ANN, by a small margin. Both rate fair for machinability — 45/100 against 40/100 for S-65C-VHP.
Ready to make it?
Upload a CAD file and FabDigit prices the part in S-65C-ANN and S-65C-VHP 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.