Copper Alloy CC331G-GM vs CC331G-SR
Copper Alloy · CC331G temper comparison
CC331G-GM and CC331G-SR are two conditions of the same copper alloy grade, CC331G: GM (permanent (chill) mould cast, as-cast) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. CC331G-GM is the stronger of the two: yield strength 230 MPa (33.4 ksi) against 190 MPa (27.6 ksi) for CC331G-SR, about 21% more; tensile strength follows at 590 MPa (85.6 ksi) vs 530 MPa (76.9 ksi). In exchange, CC331G-SR is the more ductile: elongation 28% versus 22% for CC331G-GM, and CC331G-GM is harder (130 HB vs 115 HB).
CC331G-GMChoose it when strength drives the design.
CC331G-SRChoose it when the part is bent, formed or impact-loaded.
CC331G-GM vs CC331G-SR: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 41 GPa5.9 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 7.64 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,040°C1,904 °F · Liquidus Temperature 1,045°C1,913 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 220 J/g94.6 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -196°C-321 °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 %)
Weldability
Formability (cold)
Same in both: Castability 78 / 100 · Brazeability / Solderability 30 / 100 · Polishability 70 / 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 400 L/kg47.9 gal/lb · Typical Recycled Content 50%
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.
CC331G-GM vs CC331G-SR — frequently asked
Is CC331G-GM stronger than CC331G-SR?
Yes. CC331G-GM has a typical yield strength of 230 MPa (33.4 ksi) against 190 MPa (27.6 ksi) for CC331G-SR — about 21% more. Tensile strength is 590 MPa (85.6 ksi) vs 530 MPa (76.9 ksi).
Which condition does FabDigit quote by default, GM or SR?
GS is the default CC331G condition in the FabDigit quote flow (neither GM nor SR). 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, CC331G-GM or CC331G-SR?
CC331G-SR, by a small margin. Both rate fair for machinability — 48/100 against 43/100 for CC331G-GM; for welding the order is CC331G-SR first (good, 68/100) then CC331G-GM (good, 63/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC331G-GM and CC331G-SR 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.