Materials / Compare

Brass C260 vs. Zinc Zamak 3

Compare Brass C260 vs. Zinc Zamak 3 strength, stiffness, weight and thermal properties.

Brass C260Wrought
Zinc Zamak 3Cast
MechanicalBrass C260Zinc Zamak 3
Yield strength345MPa11.56x stronger221MPa2
Ultimate tensile strength427MPa11.51x stronger283MPa2
Elongation at break23%12.3x more ductile10%2
Young's modulus (stiffness)110GPa329% stiffer85.5GPa2
Density8,525kg/m³36,600kg/m³229% lighter
Strength to weight40.5kN·m/kg21% higher33.5kN·m/kg
Stiffness to weight12.9MN·m/kg13MN·m/kg
Poisson's ratio0.3440.275
Shear modulus41.2GPa22% stiffer in shear33.7GPa
Bulk modulus115GPa1.85x higher62GPa
Speed of sound3,597m/s3,599m/s
1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonWoodAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110Copper C10100Copper C12200GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VNickel Inconel 718Magnesium AZ31B-H24Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin StandardSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelConcretePCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum 3003-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Brass C260Zinc Zamak 3
Stiffness against densityHigher and further left: stiffer for its weight
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberWoodAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110Copper C10100Copper C12200GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VNickel Inconel 718Magnesium AZ31B-H24Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin StandardSLA Resin Tough 2000SLA Resin Elastic 50ASLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickPCB Laminate FR-4SiliconCeramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum 3003-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Brass C260Zinc Zamak 3
Strength against densityHigher and further left: stronger for its weight
ThermalBrass C260Zinc Zamak 3
Thermal conductivity121W/m·K3113W/m·K2
Thermal expansion20µm/m·K337% less27.4µm/m·K2
100 mm part over a 50 °C swing100µm growth37% less137µm growth
Specific heat377J/kg·K3419J/kg·K211% higher
Heats up and cools (diffusivity)37.7mm²/s40.9mm²/s8% faster
Thermal shock resistance12,510W/m1.61x more resistant7,782W/m
Melting pointsolidus-liquidus916–954°C3melting range381–387°C2
1k10k0.1110100Density (kg/m³)Thermal conductivity (W/m·K)Plastic PLAPlastic PETGPlastic ABSPlastic NylonRubberWoodAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110Copper C10100Copper C12200GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VNickel Inconel 718Magnesium AZ31B-H24Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM HIPSSLA Resin StandardDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelConcreteBrickPCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum 3003-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Brass C260Zinc Zamak 3
Thermal conductivity against densityHigher and further left: spreads more heat for its weight
0.111010010100Thermal conductivity (W/m·K)Thermal expansion (µm/m·K)Plastic PETGPlastic ABSPlastic NylonWoodAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110Copper C10100Copper C12200GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VNickel Inconel 718Magnesium AZ31B-H24Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM HIPSSLA Resin StandardDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelConcreteBrickPlywoodPCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum 3003-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Brass C260Zinc Zamak 3
Thermal expansion against thermal conductivityLower and further right: warps less when heated
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Sources5 documents: Copper Development Association, Nathan Trotter, Wieland, Eastern Alloys
Brass C260
C26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical)
Zinc Zamak 3
Zamak 3 (ASTM B86 die cast), Nathan Trotter (zinc alloy producer) technical data sheet, typical values
  1. 1
    Electronic Connector Design Guide: Cold Rolled TempersCopper Development Associationarchived copyBrass C260 · Yield strength: nominal, strip/flat, 0.5% extension (not 0.2% offset)Brass C260 · Ultimate tensile strength: nominal, strip/flatBrass C260 · Elongation at break: nominal, in 2.0 in., strip/flat
  2. 2
    Zamak 3 Technical Data SheetNathan Trotterarchived copyZinc Zamak 3 · Yield strength: typicalZinc Zamak 3 · Ultimate tensile strength: typicalZinc Zamak 3 · Elongation at break: typical, in 2 in.Zinc Zamak 3 · Young's modulus (stiffness): typicalZinc Zamak 3 · Density: typicalZinc Zamak 3 · Thermal conductivity: typicalZinc Zamak 3 · Thermal expansion: typicalZinc Zamak 3 · Specific heat: typicalZinc Zamak 3 · Melting point: melting range
  3. 3
    C26000 Alloy (copper.org)Copper Development Associationarchived copyBrass C260 · Young's modulus (stiffness): typical, temper-independentBrass C260 · Density: nominalBrass C260 · Thermal conductivity: typical, 20 °CBrass C260 · Thermal expansion: typical, mean 20-300 °CBrass C260 · Specific heat: typical, 20 °CBrass C260 · Melting point: solidus-liquidus
  4. 4
    Wieland-M30 (CuZn30, C26000) Data SheetWielandarchived copyBrass C260 · Poisson's ratio: reference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products)
  5. 5
    Zinc Die Casting Properties Guide (2012)Eastern AlloysZinc Zamak 3 · Poisson's ratio: typical, Zamak 3 hot-chamber die cast

Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

Questions

Mechanical

Is Brass C260 stronger than Zinc Zamak 3?

Brass C260 is stronger: its yield strength is 345 MPa against 221 MPa for Zinc Zamak 3 (1.56x).

Which is lighter, Brass C260 or Zinc Zamak 3?

Zinc Zamak 3 is lighter: 6,600 kg/m³ against 8,525 kg/m³ for Brass C260.

Which is stiffer, Brass C260 or Zinc Zamak 3?

Brass C260 is stiffer: Young's modulus 110 GPa against 85.5 GPa for Zinc Zamak 3, so the same part in Brass C260 deflects less under the same load.

Which is lighter for the same job, Brass C260 or Zinc Zamak 3?

For the same stiffness or strength: Brass C260 is lighter for a strong rod or tie, strong beam; Zinc Zamak 3 is lighter for a stiff beam (bending), stiff panel or plate, strong panel or plate.

Part that must beBrass C260Zinc Zamak 3
Stiff rod or tie (tension)about equalabout equal
Stiff beam (bending)14% heavierlighter
Stiff panel or plate19% heavierlighter
Strong rod or tielighter21% heavier
Strong beamlighter4% heavier
Strong panel or plate3% heavierlighter

For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).

Which is more ductile, Brass C260 or Zinc Zamak 3?

Brass C260 stretches further before it breaks: 23% elongation at break against 10% for Zinc Zamak 3.

Thermal

Which conducts heat better, Brass C260 or Zinc Zamak 3?

Brass C260 conducts heat better: 121 W/m·K against 113 W/m·K for Zinc Zamak 3.

Which expands less with temperature?

Brass C260 expands less: 20 µm/m·K against 27.4 µm/m·K for Zinc Zamak 3.

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