Refractory Metal Zr 705-ANN vs Zr 705-BQA
Refractory Metal · Zr 705 temper comparison
Zr 705-ANN and Zr 705-BQA are two conditions of the same refractory metal grade, Zr 705: ANN (annealed) versus BQA (beta quenched and aged). The chemistry is identical, so every difference below comes from the condition. Zr 705-BQA is the stronger of the two: yield strength 760 MPa (110 ksi) against 450 MPa (65.3 ksi) for Zr 705-ANN, about 69% more; tensile strength follows at 900 MPa (131 ksi) vs 620 MPa (89.9 ksi). In exchange, Zr 705-ANN is the more ductile: elongation 20% versus 10% for Zr 705-BQA, and Zr 705-BQA is harder (300 HB vs 200 HB). On the shop floor, Zr 705-ANN welds better (good vs fair).
Zr 705-ANNChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
Zr 705-BQAChoose it when strength drives the design.
Zr 705-ANN vs Zr 705-BQA: 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 36 GPa5.2 Msi · Bulk Modulus 97 GPa14.1 Msi · Poisson's Ratio 0.35 · Hardness, Rockwell B 95 HRB
Physical
Density and transition temperatures.
Same in both: Density 6.64 g/cm³0.24 lb/in³ · Melting Point (Solidus) 1,840°C3,344 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 281 J/kg·K0.07 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 6.3 µm/m·K3.5 µin/in·°F · Latent Heat of Fusion 155 J/g66.6 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
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: Castability 25 / 100 · Brazeability / Solderability 20 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,400 MJ/kg601,892 BTU/lb · Embodied Carbon (primary production) 85 kg CO₂/kg · Embodied Water 600 L/kg71.9 gal/lb · Typical Recycled Content 25%
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.
Zr 705-ANN vs Zr 705-BQA — frequently asked
Is Zr 705-BQA stronger than Zr 705-ANN?
Yes. Zr 705-BQA has a typical yield strength of 760 MPa (110 ksi) against 450 MPa (65.3 ksi) for Zr 705-ANN — about 69% more. Tensile strength is 900 MPa (131 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, ANN or BQA?
ANN is the default Zr 705 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, Zr 705-ANN or Zr 705-BQA?
Zr 705-ANN. Its machinability rates fair (35/100) against poor (28/100) for Zr 705-BQA; for welding the order is Zr 705-ANN first (good, 65/100) then Zr 705-BQA (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Zr 705-ANN and Zr 705-BQA 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.