Copper Alloy C69300-H80 vs C69300-M20
Copper Alloy · C69300 temper comparison
C69300-H80 and C69300-M20 are two conditions of the same copper alloy grade, C69300: H80 (hard drawn) versus M20 (as hot rolled). The chemistry is identical, so every difference below comes from the condition. C69300-H80 is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 270 MPa (39.2 ksi) for C69300-M20, about 93% more; tensile strength follows at 680 MPa (98.6 ksi) vs 530 MPa (76.9 ksi). In exchange, C69300-M20 is the more ductile: elongation 25% versus 10% for C69300-H80, and C69300-H80 is harder (190 HB vs 140 HB). C69300-M20 runs hotter in service (200°C vs 150°C continuous).
C69300-H80Choose it when strength drives the design.
C69300-M20Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C69300-H80 vs C69300-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
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 39 GPa5.7 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 821°C1,510 °F · Liquidus Temperature 899°C1,650 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 32 W/m·K18.5 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 18.5 µm/m·K10.3 µin/in·°F · Latent Heat of Fusion 190 J/g81.7 BTU/lb · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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
Weldability
Formability (cold)
Same in both: Castability 65 / 100 · Brazeability / Solderability 80 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 62 MJ/kg26,655 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 350 L/kg41.9 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.
C69300-H80 vs C69300-M20 — frequently asked
Is C69300-H80 stronger than C69300-M20?
Yes. C69300-H80 has a typical yield strength of 520 MPa (75.4 ksi) against 270 MPa (39.2 ksi) for C69300-M20 — about 93% more. Tensile strength is 680 MPa (98.6 ksi) vs 530 MPa (76.9 ksi).
Which condition does FabDigit quote by default, H80 or M20?
M30 is the default C69300 condition in the FabDigit quote flow (neither H80 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.
Which is easier to machine, C69300-H80 or C69300-M20?
C69300-H80, by a small margin. Both rate very good for machinability — 84/100 against 78/100 for C69300-M20; for welding the order is C69300-M20 first (fair, 45/100) then C69300-H80 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C69300-H80 and C69300-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.