Nickel Alloy Hastelloy X As Cast vs Hastelloy X Stress Relieved
Nickel Alloy · Hastelloy X temper comparison
Hastelloy X As Cast and Hastelloy X Stress Relieved are two conditions of the same nickel alloy grade, Hastelloy X: As Cast versus Stress Relieved. The chemistry is identical, so every difference below comes from the condition. Hastelloy X Stress Relieved is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 320 MPa (46.4 ksi) for Hastelloy X As Cast, about 63% more; tensile strength follows at 790 MPa (115 ksi) vs 620 MPa (89.9 ksi). Hastelloy X Stress Relieved is the more ductile: elongation 30% versus 20% for Hastelloy X As Cast, and Hastelloy X Stress Relieved is harder (218 HB vs 190 HB). Hastelloy X Stress Relieved is stiffer (203 GPa vs 190 GPa) and Hastelloy X As Cast runs hotter in service (1,100°C vs 900°C continuous). On the shop floor, Hastelloy X Stress Relieved welds better (very good vs good).
Hastelloy X As CastChoose it when the part sees heat.
Hastelloy X Stress RelievedChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Hastelloy X As Cast 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 As CastHastelloy 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.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 9 W/m·K5.2 BTU/hr·ft·°F · 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 As Cast vs Hastelloy X Stress Relieved — frequently asked
Is Hastelloy X Stress Relieved stronger than Hastelloy X As Cast?
Yes. Hastelloy X Stress Relieved has a typical yield strength of 520 MPa (75.4 ksi) against 320 MPa (46.4 ksi) for Hastelloy X As Cast — about 63% more. Tensile strength is 790 MPa (115 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, As Cast or Stress Relieved?
Solution Annealed is the default Hastelloy X condition in the FabDigit quote flow (neither As Cast 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 As Cast or Hastelloy X Stress Relieved?
Hastelloy X Stress Relieved. Its weldability rates very good (82/100) against good (65/100) for Hastelloy X As Cast.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Hastelloy X As Cast 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.