Copper Alloy CC212E-GM vs CC212E-SR
Copper Alloy · CC212E temper comparison
CC212E-GM and CC212E-SR are two conditions of the same copper alloy grade, CC212E: GM (permanent (chill/gravity die) cast) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. CC212E-GM is the stronger of the two: yield strength 340 MPa (49.3 ksi) against 300 MPa (43.5 ksi) for CC212E-SR, about 13% more; tensile strength follows at 720 MPa (104 ksi) vs 670 MPa (97.2 ksi). In exchange, CC212E-SR is the more ductile: elongation 28% versus 24% for CC212E-GM, and CC212E-GM is harder (185 HB vs 170 HB).
CC212E-GMChoose it when strength drives the design.
CC212E-SRChoose it when the part is bent, formed or impact-loaded.
CC212E-GM vs CC212E-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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 43 GPa6.2 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 7.5 g/cm³0.27 lb/in³ · Melting Point (Solidus) 870°C1,598 °F · Liquidus Temperature 900°C1,652 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.5 µm/m·K9.7 µin/in·°F · Latent Heat of Fusion 215 J/g92.4 BTU/lb · Max Service Temperature (continuous) 250°C482 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 3 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.29 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 80 / 100 · Brazeability / Solderability 25 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 58 MJ/kg24,936 BTU/lb · Embodied Carbon (primary production) 4 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
CC212E-GM vs CC212E-SR — frequently asked
Is CC212E-GM stronger than CC212E-SR?
Yes. CC212E-GM has a typical yield strength of 340 MPa (49.3 ksi) against 300 MPa (43.5 ksi) for CC212E-SR — about 13% more. Tensile strength is 720 MPa (104 ksi) vs 670 MPa (97.2 ksi).
Which condition does FabDigit quote by default, GM or SR?
GS is the default CC212E 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.
When should I choose CC212E-GM over CC212E-SR?
Pick CC212E-GM when strength drives the design. Pick CC212E-SR when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CC212E-GM and CC212E-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.