Materials / Compare

Brass C260 vs. Plastic PBT GF30

Compare Brass C260 vs. Plastic PBT GF30 strength, stiffness, weight and thermal properties.

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Brass C260Wrought
Plastic PBT GF30Bulk polymer (molded or machined)
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Mechanical
Yield strength345MPasourcenominal, strip/flat, 0.5% extension (not 0.2% offset)not given (tensile used)
Ultimate tensile strength427MPasourcenominal, strip/flat140MPasourcestress at break, 23 °C
Flexural strengthnot sourced210MPasourcetypical, 23 °C
Elongation at break23%sourcenominal, in 2.0 in., strip/flat3%sourcestrain at break, 23 °C
Young's modulus (stiffness)110GPasourcetypical, temper-independent9.8GPasourcetypical, 23 °C
Density8,525kg/m³sourcenominal1,530kg/m³sourcetypical
Strength to weight40.5kN·m/kg91.5kN·m/kg2.26x higher
Stiffness to weight12.9MN·m/kg2.02x higher6.41MN·m/kg
Poisson's ratio0.34sourcereference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products)not sourced
Shear modulus41.2GPanot sourced
Bulk modulus115GPanot sourced
Speed of sound3,597m/s2,531m/s
Thermal
Thermal conductivity121W/m·Ksourcetypical, 20 °C0.27W/m·Ksourcetypical (DIN 52612-1)
Thermal expansion20µm/m·Ksourcetypical, mean 20-300 °C25µm/m·Ksourcelongitudinal (flow), mean 23-55 °C
100 mm part over a 50 °C swing100µm growth25% less125µm growth
Specific heat377J/kg·Ksourcetypical, 20 °C1,050J/kg·Ksourcetypical, 23 °C
Heats up and cools (diffusivity)37.7mm²/s224x faster0.168mm²/s
Thermal shock resistance12,510W/mnot sourced
Melting point916–954°Csourcesolidus-liquidus223°CsourceDSC (ISO 11357)
Max service temperaturenot sourced205°CsourceHDT 1.8 MPa
Values forC26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical)BASF Ultradur B 4300 G6 (PBT, 30% glass fibre), injection moulding grade; product information sheet 09/2026, typical values for uncoloured product at 23 °C.

Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

Questions

Is Brass C260 stronger than Plastic PBT GF30?

Brass C260 is stronger: its yield strength is 345 MPa against tensile strength 140 MPa for Plastic PBT GF30 (2.46x).

Which is lighter, Brass C260 or Plastic PBT GF30?

Plastic PBT GF30 is lighter: 1,530 kg/m³ against 8,525 kg/m³ for Brass C260.

Which is stiffer, Brass C260 or Plastic PBT GF30?

Brass C260 is stiffer: Young's modulus 110 GPa against 9.8 GPa for Plastic PBT GF30, so the same part in Brass C260 deflects less under the same load.

Which is lighter for the same job, Brass C260 or Plastic PBT GF30?

For the same stiffness or strength: Brass C260 is lighter for a stiff rod or tie (tension); Plastic PBT GF30 is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.

Part that must beBrass C260Plastic PBT GF30
Stiff rod or tie (tension)lighter2.02x heavier
Stiff beam (bending)1.66x heavierlighter
Stiff panel or plate2.49x heavierlighter
Strong rod or tie2.26x heavierlighter
Strong beam3.05x heavierlighter
Strong panel or plate3.55x 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 conducts heat better, Brass C260 or Plastic PBT GF30?

Brass C260 conducts heat better: 121 W/m·K against 0.27 W/m·K for Plastic PBT GF30.

Which expands less with temperature?

Brass C260 expands less: 20 µm/m·K against 25 µm/m·K for Plastic PBT GF30.

Among 72 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VNickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelPCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PPS GF40Plastic LCP GF30Brass C260Plastic PBT GF30
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VNickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA 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 ADC12Magnesium AZ91DSolder SAC305Plastic PPS GF40Plastic LCP GF30Brass C260Plastic PBT GF30
Strength against density

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