Copper Alloy C33000 vs C35300
Copper Alloy · grade comparison
Copper Alloy C33000 and C35300 are both copper alloy grades. C35300 is the stronger of the two: yield strength 345 MPa (50 ksi) against 110 MPa (16 ksi) for C33000, about 3.1 times as much; tensile strength follows at 420 MPa (60.9 ksi) vs 340 MPa (49.3 ksi). In exchange, C33000 is the more ductile: elongation 55% versus 20% for C35300, and C35300 is harder (115 HB vs 55 HB). C33000 is stiffer (103 GPa vs 97 GPa) and C33000 runs hotter in service (200°C vs 150°C continuous). On the shop floor, C33000 welds better (25 vs 15 out of 100).
C33000Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C35300Choose it when strength drives the design.
C33000 vs C35300: 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
Shear Modulus
Bulk 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, Vickers
Hardness, Rockwell B
Same in both: Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 8.47 g/cm³0.31 lb/in³
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)
Same in both: Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 26 % IACS · Electrical Resistivity 6.6×10⁻⁸ Ω·m2.6 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.
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Machinability 70 / 100 · Machinability Rating (AISI 1212 = 100 %) 180%
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 3.6 kg CO₂/kg
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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 | C33000 | C35300 |
|---|---|---|
| Sheet metal | Yes | — |
| Default condition | O | H02 |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | 0.8 mm | 0.8 mm |
| Best machined surface | Ra 1.6 µm | Ra 1.6 µm |
Both are offered for CNC machining. Both take the same 9 finishes: Chrome Plating, Copper Plating, Electroless Nickel (EN), Electropolishing, Gold Plating, Nickel Plating, Painting, Silver Plating, Tin Plating.
C33000 vs C35300 — frequently asked
Is C35300 stronger than C33000?
Yes. C35300 has a typical yield strength of 345 MPa (50 ksi) against 110 MPa (16 ksi) for C33000 — about 3.1 times as much. Tensile strength is 420 MPa (60.9 ksi) vs 340 MPa (49.3 ksi).
Which is cheaper, C33000 or C35300?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, C33000 or C35300?
C33000. Its weldability rates poor (25/100) against poor (15/100) for C35300.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C33000 and C35300 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.