Copper Alloy C36800-M20 vs C36800-M30
Copper Alloy · C36800 temper comparison
C36800-M20 and C36800-M30 are two conditions of the same copper alloy grade, C36800: M20 (as hot rolled) versus M30 (as hot extruded). The chemistry is identical, so every difference below comes from the condition. C36800-M30 is the stronger of the two: yield strength 160 MPa (23.2 ksi) against 140 MPa (20.3 ksi) for C36800-M20, about 14% more. In exchange, C36800-M20 is the more ductile: elongation 45% versus 40% for C36800-M30.
C36800-M20Choose it when the part is bent, formed or impact-loaded.
C36800-M30Choose it when strength drives the design.
C36800-M20 vs C36800-M30: 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 105 GPa15.2 Msi · Shear Modulus 39 GPa5.7 Msi · Bulk Modulus 112 GPa16.2 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.41 g/cm³0.3 lb/in³ · Melting Point (Solidus) 885°C1,625 °F · Liquidus Temperature 900°C1,652 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 123 W/m·K71.1 BTU/hr·ft·°F · Specific Heat Capacity 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.8 µm/m·K11.6 µin/in·°F · Latent Heat of Fusion 160 J/g68.8 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 28 % IACS · Electrical Resistivity 6.2×10⁻⁸ Ω·m2.44 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.27 V · Corrosion Resistance 55 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Formability (cold)
Same in both: Machinability 68 / 100 · Machinability Rating (AISI 1212 = 100 %) 60% · Weldability 25 / 100 · Brazeability / Solderability 80 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 60 MJ/kg25,795 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 65%
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.
C36800-M20 vs C36800-M30 — frequently asked
Is C36800-M30 stronger than C36800-M20?
Yes. C36800-M30 has a typical yield strength of 160 MPa (23.2 ksi) against 140 MPa (20.3 ksi) for C36800-M20 — about 14% more. Tensile strength is 380 MPa (55.1 ksi) vs 370 MPa (53.7 ksi).
Which condition does FabDigit quote by default, M20 or M30?
M20 is the default C36800 condition in the FabDigit quote flow. 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 C36800-M20 over C36800-M30?
Pick C36800-M20 when the part is bent, formed or impact-loaded. Pick C36800-M30 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C36800-M20 and C36800-M30 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.