Copper Alloy ZCuAl9Mn2-Li vs ZCuAl9Mn2-SR
Copper Alloy · ZCuAl9Mn2 temper comparison
ZCuAl9Mn2-Li and ZCuAl9Mn2-SR are two conditions of the same copper alloy grade, ZCuAl9Mn2: Li (centrifugally cast) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. ZCuAl9Mn2-Li is the stronger of the two: yield strength 195 MPa (28.3 ksi) against 155 MPa (22.5 ksi) for ZCuAl9Mn2-SR, about 26% more; tensile strength follows at 490 MPa (71.1 ksi) vs 410 MPa (59.5 ksi). In exchange, ZCuAl9Mn2-SR is the more ductile: elongation 30% versus 25% for ZCuAl9Mn2-Li, and ZCuAl9Mn2-Li is harder (108 HB vs 88 HB).
ZCuAl9Mn2-LiChoose it when strength drives the design.
ZCuAl9Mn2-SRChoose it when the part is bent, formed or impact-loaded.
ZCuAl9Mn2-Li vs ZCuAl9Mn2-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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 41 GPa5.9 Msi · Bulk Modulus 112 GPa16.2 Msi · Poisson's Ratio 0.33 · Compressive Strength 450 MPa65.3 ksi · Fracture Toughness (K_IC) 45 MPa·√m41 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 7.6 g/cm³0.27 lb/in³ · Melting Point (Solidus) 1,040°C1,904 °F · Liquidus Temperature 1,060°C1,940 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 400 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.8 µm/m·K9.3 µin/in·°F · Latent Heat of Fusion 210 J/g90.3 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · 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) -0.29 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 65 / 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 250 L/kg30 gal/lb · Typical Recycled Content 65%
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.
ZCuAl9Mn2-Li vs ZCuAl9Mn2-SR — frequently asked
Is ZCuAl9Mn2-Li stronger than ZCuAl9Mn2-SR?
Yes. ZCuAl9Mn2-Li has a typical yield strength of 195 MPa (28.3 ksi) against 155 MPa (22.5 ksi) for ZCuAl9Mn2-SR — about 26% more. Tensile strength is 490 MPa (71.1 ksi) vs 410 MPa (59.5 ksi).
Which condition does FabDigit quote by default, Li or SR?
S is the default ZCuAl9Mn2 condition in the FabDigit quote flow (neither Li 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, ZCuAl9Mn2-Li or ZCuAl9Mn2-SR?
ZCuAl9Mn2-SR, by a small margin. Both rate fair for machinability — 42/100 against 37/100 for ZCuAl9Mn2-Li.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ZCuAl9Mn2-Li and ZCuAl9Mn2-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.