Copper Alloy C71580-AW vs C71580-M20
Copper Alloy · C71580 temper comparison
C71580-AW and C71580-M20 are two conditions of the same copper alloy grade, C71580: AW (as-welded deposit) versus M20 (as hot rolled). The chemistry is identical, so every difference below comes from the condition. C71580-AW is the stronger of the two: yield strength 220 MPa (31.9 ksi) against 170 MPa (24.7 ksi) for C71580-M20, about 29% more. In exchange, C71580-M20 is the more ductile: elongation 38% versus 30% for C71580-AW, and C71580-AW is harder (90 HB vs 85 HB).
C71580-AWChoose it when strength drives the design.
C71580-M20Choose it when the part is bent, formed or impact-loaded.
C71580-AW vs C71580-M20: 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
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
Hardness, Vickers
Same in both: Shear Modulus 57 GPa8.3 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.33 · Tensile Strength (Ultimate) 400 MPa58 ksi
Physical
Density and transition temperatures.
Same in both: Density 8.94 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
Same in both: Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 220 J/g94.6 BTU/lb · Max Service Temperature (continuous) 350°C662 °F · Min Service Temperature -198°C-324 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.26 V · Corrosion Resistance 82 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 88 / 100 · Castability 58 / 100 · Brazeability / Solderability 78 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 88 MJ/kg37,833 BTU/lb · Embodied Carbon (primary production) 6.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 30%
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.
C71580-AW vs C71580-M20 — frequently asked
Is C71580-AW stronger than C71580-M20?
Yes. C71580-AW has a typical yield strength of 220 MPa (31.9 ksi) against 170 MPa (24.7 ksi) for C71580-M20 — about 29% more. Tensile strength is 400 MPa (58 ksi) vs 400 MPa (58 ksi).
Which condition does FabDigit quote by default, AW or M20?
O61 is the default C71580 condition in the FabDigit quote flow (neither AW nor M20). 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 C71580-AW over C71580-M20?
Pick C71580-AW when strength drives the design. Pick C71580-M20 when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C71580-AW and C71580-M20 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.