Refractory Metal TZC-CW vs TZC-SR
Refractory Metal · TZC temper comparison
TZC-CW and TZC-SR are two conditions of the same refractory metal grade, TZC: CW (cold worked) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. TZC-CW is the stronger of the two: yield strength 1,180 MPa (171 ksi) against 930 MPa (135 ksi) for TZC-SR, about 27% more; tensile strength follows at 1,300 MPa (189 ksi) vs 1,050 MPa (152 ksi). In exchange, TZC-SR is the more ductile: elongation 8% versus 5% for TZC-CW, and TZC-CW is harder (35 HRC vs 30 HRC). TZC-SR runs hotter in service (1,500°C vs 1,100°C continuous).
TZC-CWChoose it when strength drives the design.
TZC-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
TZC-CW vs TZC-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.
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, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 122 GPa17.7 Msi · Bulk Modulus 280 GPa40.6 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 10.05 g/cm³0.36 lb/in³ · Melting Point (Solidus) 2,590°C4,694 °F · Liquidus Temperature 2,620°C4,748 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 250 J/kg·K0.06 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 5.3 µm/m·K2.9 µin/in·°F · Latent Heat of Fusion 375 J/g161 BTU/lb · Min Service Temperature 20°C68 °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) -0.2 V · Corrosion Resistance 45 / 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: Castability 25 / 100 · Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 210 MJ/kg90,284 BTU/lb · Embodied Carbon (primary production) 15 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.
TZC-CW vs TZC-SR — frequently asked
Is TZC-CW stronger than TZC-SR?
Yes. TZC-CW has a typical yield strength of 1,180 MPa (171 ksi) against 930 MPa (135 ksi) for TZC-SR — about 27% more. Tensile strength is 1,300 MPa (189 ksi) vs 1,050 MPa (152 ksi).
Which condition does FabDigit quote by default, CW or SR?
SR is the default TZC 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, TZC-CW or TZC-SR?
TZC-SR. Its weldability rates poor (15/100) against not recommended (10/100) for TZC-CW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in TZC-CW and TZC-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.