Copper Alloy CC381H-GS vs CC381H-GZ
Copper Alloy · CC381H temper comparison
CC381H-GS and CC381H-GZ are two conditions of the same copper alloy grade, CC381H: GS (sand cast) versus GZ (centrifugally cast). The chemistry is identical, so every difference below comes from the condition. CC381H-GZ is the stronger of the two: yield strength 275 MPa (39.9 ksi) against 255 MPa (37 ksi) for CC381H-GS, about 8% more; tensile strength follows at 500 MPa (72.5 ksi) vs 470 MPa (68.2 ksi). In exchange, CC381H-GS is the more ductile: elongation 25% versus 20% for CC381H-GZ, and CC381H-GZ is harder (150 HB vs 140 HB).
CC381H-GSChoose it when the part is bent, formed or impact-loaded.
CC381H-GZChoose it when strength drives the design.
CC381H-GS vs CC381H-GZ: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all copper 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 copper 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Shear Modulus 56 GPa8.1 Msi · Bulk Modulus 145 GPa21 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.9 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,170°C2,138 °F · Liquidus Temperature 1,240°C2,264 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 28 W/m·K16.2 BTU/hr·ft·°F · Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 15.3 µm/m·K8.5 µin/in·°F · Latent Heat of Fusion 220 J/g94.6 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 4.6 % IACS · Electrical Resistivity 3.75×10⁻⁷ Ω·m14.8 µΩ·in
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 %)
Weldability
Same in both: Castability 60 / 100 · Brazeability / Solderability 70 / 100 · Polishability 78 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 75 MJ/kg32,244 BTU/lb · Embodied Carbon (primary production) 6 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 40%
Strength versus weight
Yield strength against density for every copper alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
CC381H-GS vs CC381H-GZ — frequently asked
Is CC381H-GZ stronger than CC381H-GS?
Yes. CC381H-GZ has a typical yield strength of 275 MPa (39.9 ksi) against 255 MPa (37 ksi) for CC381H-GS — about 8% more. Tensile strength is 500 MPa (72.5 ksi) vs 470 MPa (68.2 ksi).
Which condition does FabDigit quote by default, GS or GZ?
GS is the default CC381H 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.
When should I choose CC381H-GS over CC381H-GZ?
Pick CC381H-GS when the part is bent, formed or impact-loaded. Pick CC381H-GZ when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC381H-GS and CC381H-GZ 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.