Copper Alloy CC381H vs CC383H
Copper Alloy · grade comparison
Copper Alloy CC381H and CC383H are both copper alloy grades. CC383H is the stronger of the two: yield strength 290 MPa (42.1 ksi) against 255 MPa (37 ksi) for CC381H, about 14% more. In exchange, CC381H is the more ductile: elongation 25% versus 22% for CC383H.
CC381HChoose it when the part is bent, formed or impact-loaded.
CC383HChoose it when strength drives the design.
CC381H vs CC383H: 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.
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Charpy V-Notch Impact (RT)
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 150 GPa21.8 Msi · Reduction in Area 25% · Fatigue Strength (Endurance Limit) 150 MPa21.8 ksi · Hardness, Brinell 140 HB
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.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Min Service Temperature
Same in both: Max Service Temperature (continuous) 300°C572 °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).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Castability
Polishability
Formability (cold)
Same in both: Brazeability / Solderability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 300 L/kg35.9 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Specific Stiffness (E / density) 16.9 MN·m/kg · Thermal Shock Resistance Index 6
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.
Manufacturing and finishing
| Capability | CC381H | CC383H |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
CC381H vs CC383H — frequently asked
Is CC383H stronger than CC381H?
Yes. CC383H has a typical yield strength of 290 MPa (42.1 ksi) against 255 MPa (37 ksi) for CC381H — about 14% more. Tensile strength is 480 MPa (69.6 ksi) vs 470 MPa (68.2 ksi).
Which is cheaper, CC381H or CC383H?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, CC381H or CC383H?
CC383H, by a small margin. Both rate poor for machinability — 32/100 against 25/100 for CC381H; for welding the order is CC383H first (very good, 80/100) then CC381H (very good, 75/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC381H and CC383H 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.