Refractory Metal Zr 700 vs Zr 704C
Refractory Metal · grade comparison
Refractory Metal Zr 700 and Zr 704C are both refractory metal grades. Zr 704C is the stronger of the two: yield strength 300 MPa (43.5 ksi) against 190 MPa (27.6 ksi) for Zr 700, about 58% more; tensile strength follows at 450 MPa (65.3 ksi) vs 330 MPa (47.9 ksi). In exchange, Zr 700 is the more ductile: elongation 32% versus 13% for Zr 704C, and Zr 704C is harder (190 HB vs 120 HB). Zr 704C runs hotter in service (400°C vs 350°C continuous) and Zr 700 conducts heat better (22 W/m·K vs 13 W/m·K). On the shop floor, Zr 700 welds better (very good vs good).
Zr 700Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
Zr 704CChoose it when strength drives the design, or when the part sees heat.
Zr 700 vs Zr 704C: 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.
Bulk 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, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 99 GPa14.4 Msi · Shear Modulus 36 GPa5.2 Msi · Poisson's Ratio 0.34
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)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 285 J/kg·K0.07 BTU/lb·°F · Latent Heat of Fusion 155 J/g66.6 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 90 / 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
Brazeability / Solderability
Same in both: Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
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 refractory metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Zr 700 | Zr 704C |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Zr 700 vs Zr 704C — frequently asked
Is Zr 704C stronger than Zr 700?
Yes. Zr 704C has a typical yield strength of 300 MPa (43.5 ksi) against 190 MPa (27.6 ksi) for Zr 700 — about 58% more. Tensile strength is 450 MPa (65.3 ksi) vs 330 MPa (47.9 ksi).
Which is cheaper, Zr 700 or Zr 704C?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Zr 700 or Zr 704C?
Zr 700. Its machinability rates fair (35/100) against poor (30/100) for Zr 704C; for welding the order is Zr 700 first (very good, 75/100) then Zr 704C (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Zr 700 and Zr 704C 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.