Nickel Alloy Hastelloy X Cold Worked vs Hastelloy X Stress Relieved
Nickel Alloy · Hastelloy X temper comparison
Hastelloy X Cold Worked and Hastelloy X Stress Relieved are two conditions of the same nickel alloy grade, Hastelloy X: Cold Worked versus Stress Relieved. The chemistry is identical, so every difference below comes from the condition. Hastelloy X Cold Worked is the stronger of the two: yield strength 800 MPa (116 ksi) against 520 MPa (75.4 ksi) for Hastelloy X Stress Relieved, about 54% more; tensile strength follows at 1,000 MPa (145 ksi) vs 790 MPa (115 ksi). In exchange, Hastelloy X Stress Relieved is the more ductile: elongation 30% versus 12% for Hastelloy X Cold Worked, and Hastelloy X Cold Worked is harder (293 HB vs 218 HB). Hastelloy X Stress Relieved runs hotter in service (900°C vs 550°C continuous). On the shop floor, Hastelloy X Stress Relieved welds better (82 vs 70 out of 100).
Hastelloy X Cold WorkedChoose it when strength drives the design.
Hastelloy X Stress RelievedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Hastelloy X Cold Worked vs Hastelloy X Stress Relieved: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all nickel alloy 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 nickel alloy 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.
Hastelloy X Cold WorkedHastelloy X 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 B
Hardness, Vickers
Same in both: Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 190 GPa27.6 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 8.22 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,260°C2,300 °F · Liquidus Temperature 1,355°C2,471 °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 486 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 13.9 µm/m·K7.7 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · 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 55 / 100 · Brazeability / Solderability 80 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 215 MJ/kg92,433 BTU/lb · Embodied Carbon (primary production) 13.5 kg CO₂/kg · Embodied Water 520 L/kg62.3 gal/lb · Typical Recycled Content 35%
Strength versus weight
Yield strength against density for every nickel alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Hastelloy X Cold Worked vs Hastelloy X Stress Relieved — frequently asked
Is Hastelloy X Cold Worked stronger than Hastelloy X Stress Relieved?
Yes. Hastelloy X Cold Worked has a typical yield strength of 800 MPa (116 ksi) against 520 MPa (75.4 ksi) for Hastelloy X Stress Relieved — about 54% more. Tensile strength is 1,000 MPa (145 ksi) vs 790 MPa (115 ksi).
Which condition does FabDigit quote by default, Cold Worked or Stress Relieved?
Solution Annealed is the default Hastelloy X condition in the FabDigit quote flow (neither Cold Worked nor Stress Relieved). 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, Hastelloy X Cold Worked or Hastelloy X Stress Relieved?
Hastelloy X Stress Relieved. Its weldability rates very good (82/100) against very good (70/100) for Hastelloy X Cold Worked.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Hastelloy X Cold Worked and Hastelloy X 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.