Nickel Alloy CW-12MW vs GX40NiCrNb45-35
Nickel Alloy · grade comparison
Nickel Alloy CW-12MW and GX40NiCrNb45-35 are both nickel alloy grades. CW-12MW is the stronger of the two: yield strength 350 MPa (50.8 ksi) against 240 MPa (34.8 ksi) for GX40NiCrNb45-35, about 46% more; tensile strength follows at 550 MPa (79.8 ksi) vs 470 MPa (68.2 ksi). CW-12MW is harder — 200 HB against 175 HB for GX40NiCrNb45-35 — which matters for wear surfaces and threads. GX40NiCrNb45-35 is lighter (7.9 g/cm³ vs 8.94 g/cm³ for CW-12MW) and CW-12MW is stiffer (205 GPa vs 160 GPa). On the shop floor, CW-12MW welds better (good vs fair) and CW-12MW forms better (poor vs not recommended).
CW-12MWChoose it when strength drives the design, or when surface hardness matters.
GX40NiCrNb45-35Choose it when weight is the constraint, or when the part sees heat.
CW-12MW vs GX40NiCrNb45-35: 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Rockwell C
Compressive Strength
Hardness, Vickers
Same in both: Elongation at Break 10%
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 12%
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Same in both: Thermal Diffusivity 3 mm²/s · Thermal Shock Resistance Index 2
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.
Manufacturing and finishing
| Capability | CW-12MW | GX40NiCrNb45-35 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 3 finishes: Gold Plating, Plasma Spray, Silver Plating.
CW-12MW vs GX40NiCrNb45-35 — frequently asked
Is CW-12MW stronger than GX40NiCrNb45-35?
Yes. CW-12MW has a typical yield strength of 350 MPa (50.8 ksi) against 240 MPa (34.8 ksi) for GX40NiCrNb45-35 — about 46% more. Tensile strength is 550 MPa (79.8 ksi) vs 470 MPa (68.2 ksi).
Which is cheaper, CW-12MW or GX40NiCrNb45-35?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, CW-12MW or GX40NiCrNb45-35?
CW-12MW. Its weldability rates good (55/100) against fair (45/100) for GX40NiCrNb45-35.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CW-12MW and GX40NiCrNb45-35 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.