Refractory Metal TZM Cold Worked vs TZM Stress Relieved
Refractory Metal · TZM temper comparison
TZM Cold Worked and TZM Stress Relieved are two conditions of the same refractory metal grade, TZM: Cold Worked versus Stress Relieved. The chemistry is identical, so every difference below comes from the condition. TZM Cold Worked is the stronger of the two: yield strength 940 MPa (136 ksi) against 760 MPa (110 ksi) for TZM Stress Relieved, about 24% more; tensile strength follows at 1,050 MPa (152 ksi) vs 900 MPa (131 ksi). In exchange, TZM Stress Relieved is the more ductile: elongation 15% versus 8% for TZM Cold Worked, and TZM Cold Worked is harder (290 HB vs 255 HB). TZM Stress Relieved runs hotter in service (1,300°C vs 1,000°C continuous).
TZM Cold WorkedChoose it when strength drives the design.
TZM Stress RelievedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
TZM Cold Worked vs TZM Stress Relieved: 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.
TZM Cold WorkedTZM Stress Relieved
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, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 122 GPa17.7 Msi · Bulk Modulus 260 GPa37.7 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 10.22 g/cm³0.37 lb/in³ · Melting Point (Solidus) 2,617°C4,743 °F · Liquidus Temperature 2,623°C4,753 °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 272 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 390 J/g168 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: Brazeability / Solderability 65 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 380 MJ/kg163,371 BTU/lb · Embodied Carbon (primary production) 26 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
TZM Cold Worked vs TZM Stress Relieved — frequently asked
Is TZM Cold Worked stronger than TZM Stress Relieved?
Yes. TZM Cold Worked has a typical yield strength of 940 MPa (136 ksi) against 760 MPa (110 ksi) for TZM Stress Relieved — about 24% more. Tensile strength is 1,050 MPa (152 ksi) vs 900 MPa (131 ksi).
Which condition does FabDigit quote by default, Cold Worked or Stress Relieved?
Stress Relieved is the default TZM 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, TZM Cold Worked or TZM Stress Relieved?
TZM Stress Relieved, by a small margin. Both rate fair for machinability — 45/100 against 40/100 for TZM Cold Worked; for welding the order is TZM Stress Relieved first (poor, 20/100) then TZM Cold Worked (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in TZM Cold Worked and TZM Stress Relieved 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.