Copper Alloy C99700-M02 vs C99700-M03
Copper Alloy · C99700 temper comparison
C99700-M02 and C99700-M03 are two conditions of the same copper alloy grade, C99700: M02 (as centrifugally cast) versus M03 (as chill cast). The chemistry is identical, so every difference below comes from the condition. C99700-M02 is the stronger of the two: yield strength 275 MPa (39.9 ksi) against 235 MPa (34.1 ksi) for C99700-M03, about 17% more; tensile strength follows at 485 MPa (70.3 ksi) vs 450 MPa (65.3 ksi). C99700-M02 is harder — 145 HB against 130 HB for C99700-M03 — which matters for wear surfaces and threads.
C99700-M02Choose it when strength drives the design, or when surface hardness matters.
C99700-M02 vs C99700-M03: 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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 105 GPa15.2 Msi · Shear Modulus 40 GPa5.8 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.03 g/cm³0.29 lb/in³ · Melting Point (Solidus) 880°C1,616 °F · Liquidus Temperature 905°C1,661 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 27 W/m·K15.6 BTU/hr·ft·°F · Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20 µm/m·K11.1 µin/in·°F · Latent Heat of Fusion 200 J/g86 BTU/lb · Max Service Temperature (continuous) 230°C446 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3 % IACS · Electrical Resistivity 5.7×10⁻⁷ Ω·m22.4 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.28 V · Corrosion Resistance 66 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Polishability
Same in both: Weldability 35 / 100 · Castability 80 / 100 · Brazeability / Solderability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 75%
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.
C99700-M02 vs C99700-M03 — frequently asked
Is C99700-M02 stronger than C99700-M03?
Yes. C99700-M02 has a typical yield strength of 275 MPa (39.9 ksi) against 235 MPa (34.1 ksi) for C99700-M03 — about 17% more. Tensile strength is 485 MPa (70.3 ksi) vs 450 MPa (65.3 ksi).
Which condition does FabDigit quote by default, M02 or M03?
M01 is the default C99700 condition in the FabDigit quote flow (neither M02 nor M03). 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 C99700-M02 over C99700-M03?
Pick C99700-M02 when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C99700-M02 and C99700-M03 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.