Cobalt-Chrome Alloy Stellite 6 As Welded vs Stellite 6-HIP
Cobalt-Chrome Alloy · Stellite 6 temper comparison
Stellite 6 As Welded and Stellite 6-HIP are two conditions of the same cobalt-chrome alloy grade, Stellite 6: As Welded (as-welded deposit) versus HIP (hot isostatic pressed). The chemistry is identical, so every difference below comes from the condition. Stellite 6-HIP is the stronger of the two: yield strength 680 MPa (98.6 ksi) against 520 MPa (75.4 ksi) for Stellite 6 As Welded, about 31% more; tensile strength follows at 1,000 MPa (145 ksi) vs 800 MPa (116 ksi). Stellite 6-HIP is the more ductile: elongation 4% versus 1% for Stellite 6 As Welded. Stellite 6-HIP is stiffer (225 GPa vs 210 GPa).
Stellite 6-HIPChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Stellite 6 As Welded vs Stellite 6-HIP: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all cobalt-chrome 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 cobalt-chrome 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.
Stellite 6 As WeldedStellite 6-HIP
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 85 GPa12.3 Msi · Bulk Modulus 180 GPa26.1 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.44 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,285°C2,345 °F · Liquidus Temperature 1,395°C2,543 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 423 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.5 µm/m·K6.9 µin/in·°F · Max Service Temperature (continuous) 800°C1,472 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.9 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 55 / 100 · Castability 70 / 100 · Brazeability / Solderability 55 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 150 MJ/kg64,488 BTU/lb · Embodied Carbon (primary production) 13 kg CO₂/kg · Embodied Water 400 L/kg47.9 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every cobalt-chrome alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Stellite 6 As Welded vs Stellite 6-HIP — frequently asked
Is Stellite 6-HIP stronger than Stellite 6 As Welded?
Yes. Stellite 6-HIP has a typical yield strength of 680 MPa (98.6 ksi) against 520 MPa (75.4 ksi) for Stellite 6 As Welded — about 31% more. Tensile strength is 1,000 MPa (145 ksi) vs 800 MPa (116 ksi).
Which condition does FabDigit quote by default, As Welded or HIP?
As Cast is the default Stellite 6 condition in the FabDigit quote flow (neither As Welded nor HIP). 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.
When should I choose Stellite 6 As Welded over Stellite 6-HIP?
Pick Stellite 6-HIP when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Stellite 6 As Welded and Stellite 6-HIP 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.