Refractory Metal Zr 704C-F vs Zr 704C-SR
Refractory Metal · Zr 704C temper comparison
Zr 704C-F and Zr 704C-SR are two conditions of the same refractory metal grade, Zr 704C: F (as fabricated) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Zr 704C-F is the stronger of the two: yield strength 300 MPa (43.5 ksi) against 275 MPa (39.9 ksi) for Zr 704C-SR, about 9% more. In exchange, Zr 704C-SR is the more ductile: elongation 16% versus 13% for Zr 704C-F, and Zr 704C-F is harder (190 HB vs 180 HB).
Zr 704C-FChoose it when strength drives the design.
Zr 704C-SRChoose it when the part is bent, formed or impact-loaded.
Zr 704C-F vs Zr 704C-SR: 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
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 · Bulk Modulus 97 GPa14.1 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 6.56 g/cm³0.24 lb/in³ · Melting Point (Solidus) 1,800°C3,272 °F · Liquidus Temperature 1,845°C3,353 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 285 J/kg·K0.07 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 6 µm/m·K3.3 µin/in·°F · Latent Heat of Fusion 155 J/g66.6 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -75°C-103 °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) -0.15 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 55 / 100 · Brazeability / Solderability 20 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,200 MJ/kg515,908 BTU/lb · Embodied Carbon (primary production) 75 kg CO₂/kg · Embodied Water 900 L/kg108 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 704C-F vs Zr 704C-SR — frequently asked
Is Zr 704C-F stronger than Zr 704C-SR?
Yes. Zr 704C-F has a typical yield strength of 300 MPa (43.5 ksi) against 275 MPa (39.9 ksi) for Zr 704C-SR — about 9% more. Tensile strength is 450 MPa (65.3 ksi) vs 435 MPa (63.1 ksi).
Which condition does FabDigit quote by default, F or SR?
F is the default Zr 704C 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 welds better, Zr 704C-F or Zr 704C-SR?
Zr 704C-SR. Its weldability rates very good (70/100) against good (65/100) for Zr 704C-F.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Zr 704C-F and Zr 704C-SR 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.