Copper Alloy C27200-H08 vs C27200-M20
Copper Alloy · C27200 temper comparison
C27200-H08 and C27200-M20 are two conditions of the same copper alloy grade, C27200: H08 (spring hard) versus M20 (as hot rolled). The chemistry is identical, so every difference below comes from the condition. C27200-H08 is the stronger of the two: yield strength 500 MPa (72.5 ksi) against 125 MPa (18.1 ksi) for C27200-M20, about 4.0 times as much; tensile strength follows at 620 MPa (89.9 ksi) vs 340 MPa (49.3 ksi). In exchange, C27200-M20 is the more ductile: elongation 50% versus 4% for C27200-H08, and C27200-H08 is harder (180 HB vs 65 HB). C27200-M20 runs hotter in service (200°C vs 120°C continuous). On the shop floor, C27200-H08 machines more easily (fair vs poor).
C27200-H08Choose it when strength drives the design, or when the part is machined in volume.
C27200-M20Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C27200-H08 vs C27200-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 111 GPa16.1 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.47 g/cm³0.31 lb/in³ · Melting Point (Solidus) 905°C1,661 °F · Liquidus Temperature 930°C1,706 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.3 µm/m·K11.3 µin/in·°F · Latent Heat of Fusion 160 J/g68.8 BTU/lb · Min Service Temperature -200°C-328 °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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 45 / 100 · Brazeability / Solderability 92 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 65 MJ/kg27,945 BTU/lb · Embodied Carbon (primary production) 4.5 kg CO₂/kg · Embodied Water 280 L/kg33.6 gal/lb · Typical Recycled Content 45%
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.
C27200-H08 vs C27200-M20 — frequently asked
Is C27200-H08 stronger than C27200-M20?
Yes. C27200-H08 has a typical yield strength of 500 MPa (72.5 ksi) against 125 MPa (18.1 ksi) for C27200-M20 — about 4.0 times as much. Tensile strength is 620 MPa (89.9 ksi) vs 340 MPa (49.3 ksi).
Which condition does FabDigit quote by default, H08 or M20?
OS025 is the default C27200 condition in the FabDigit quote flow (neither H08 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, C27200-H08 or C27200-M20?
C27200-H08. Its machinability rates fair (42/100) against poor (32/100) for C27200-M20; for welding the order is C27200-M20 first (fair, 45/100) then C27200-H08 (fair, 38/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C27200-H08 and C27200-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.