Copper Alloy C17300 vs C70250
Copper Alloy · grade comparison
Copper Alloy C17300 and C70250 are both copper alloy grades. C70250 is the stronger of the two: yield strength 640 MPa (92.8 ksi) against 220 MPa (31.9 ksi) for C17300, about 191% more; tensile strength follows at 700 MPa (102 ksi) vs 470 MPa (68.2 ksi). In exchange, C17300 is the more ductile: elongation 40% versus 9% for C70250, and C70250 is harder (200 HV vs 115 HV). C17300 is lighter (8.26 g/cm³ vs 8.82 g/cm³ for C70250) and C70250 runs hotter in service (200°C vs 150°C continuous). On the shop floor, C17300 machines more easily (50 vs 35 out of 100), C70250 welds better (fair vs poor), and C70250 sits in a lower cost tier (high, $$$$) than C17300 (specialty, $$$$$).
C17300Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
C70250Choose it when strength drives the design, or when the part sees heat.
C17300 vs C70250: 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)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 50 GPa7.3 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.3
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)
Same in both: Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 62 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Same in both: Polishability 75 / 100
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
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 | C17300 | C70250 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | A | — |
| Relative cost | $$$$$ Specialty | $$$$ High |
| Min. machined wall | 0.8 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| Chrome Plating | Yes | — |
| Electropolishing | Yes | — |
| Nickel Plating | Yes | — |
| Painting | Yes | — |
| Tin Plating | Yes | — |
They share 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C17300 vs C70250 — frequently asked
Is C70250 stronger than C17300?
Yes. C70250 has a typical yield strength of 640 MPa (92.8 ksi) against 220 MPa (31.9 ksi) for C17300 — about 191% more. Tensile strength is 700 MPa (102 ksi) vs 470 MPa (68.2 ksi).
Which is cheaper, C17300 or C70250?
C70250 is the lower-cost material: it sits in the high tier ($$$$) while C17300 is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, C17300 or C70250?
C17300, by a small margin. Both rate fair for machinability — 50/100 against 35/100 for C70250; for welding the order is C70250 first (fair, 35/100) then C17300 (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C17300 and C70250 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.