Copper Alloy C37700-H02 vs C37700-M30
Copper Alloy · C37700 temper comparison
C37700-H02 and C37700-M30 are two conditions of the same copper alloy grade, C37700: H02 (half hard) versus M30 (as hot extruded). The chemistry is identical, so every difference below comes from the condition. C37700-H02 is the stronger of the two: yield strength 310 MPa (45 ksi) against 140 MPa (20.3 ksi) for C37700-M30, about 121% more; tensile strength follows at 450 MPa (65.3 ksi) vs 360 MPa (52.2 ksi). In exchange, C37700-M30 is the more ductile: elongation 45% versus 18% for C37700-H02, and C37700-H02 is harder (135 HB vs 100 HB). C37700-M30 runs hotter in service (200°C vs 150°C continuous).
C37700-H02Choose it when strength drives the design.
C37700-M30Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C37700-H02 vs C37700-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
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 39 GPa5.7 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.44 g/cm³0.3 lb/in³ · Melting Point (Solidus) 885°C1,625 °F · Liquidus Temperature 899°C1,650 °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 377 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 · 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) -0.28 V
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 25 / 100 · Brazeability / Solderability 88 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 50 MJ/kg21,496 BTU/lb · Embodied Carbon (primary production) 3 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 70%
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.
C37700-H02 vs C37700-M30 — frequently asked
Is C37700-H02 stronger than C37700-M30?
Yes. C37700-H02 has a typical yield strength of 310 MPa (45 ksi) against 140 MPa (20.3 ksi) for C37700-M30 — about 121% more. Tensile strength is 450 MPa (65.3 ksi) vs 360 MPa (52.2 ksi).
Which condition does FabDigit quote by default, H02 or M30?
M30 is the default C37700 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 C37700-H02 over C37700-M30?
Pick C37700-H02 when strength drives the design. Pick C37700-M30 when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C37700-H02 and C37700-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.