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PCB Board FR-4, 2 copper planes vs. Plastic PLA

Compare PCB Board FR-4, 2 copper planes vs. Plastic PLA strength, stiffness, weight and thermal properties.

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PCB Board FR-4, 2 copper planesComposite
Plastic PLA3D printed (FDM)
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Mechanical
Yield strengthnot given (tensile used)52.5MPasourcetypical
Ultimate tensile strength246–385MPasourcethe bare laminate's (fr4-370hr), in-plane: cross direction .. length direction (ASTM D3039)52.5MPasourcetypical, peak stress (= stress at yield)
Flexural strengthnot sourced96.8MPasourcetypical
Elongation at breaknot sourced7.8%sourcetypical
Young's modulus (stiffness)21.9–25.8GPasourcethe bare laminate's (fr4-370hr), in-plane: cross direction .. length direction (ASTM D790-15e2); the copper planes are left out3.25GPasourcetypical
Densitynot sourced1,240kg/m³sourcetypical
Strength to weightnot sourced42.3kN·m/kg
Stiffness to weightnot sourced2.62MN·m/kg
Poisson's ratio0.171–0.177sourcethe bare laminate's (fr4-370hr), in-plane: cross direction .. length directionnot sourced
Shear modulus10.2GPanot sourced
Bulk modulus12.2GPanot sourced
Speed of soundnot sourced1,619m/s
Thermal
Thermal conductivitynot sourced0.13W/m·Ksourcebase material: NatureWorks Ingeo biopolymer, amorphous sheet, 25 °C
Thermal expansion13–14µm/m·Ksourcethe bare laminate's (fr4-370hr), in-plane X/Y-axis, below Tg (IPC-TM-650 2.4.24C)not sourced
100 mm part over a 50 °C swing67.5µm growthnot sourced
Specific heatnot sourced1,200J/kg·Ksourcebase material: NatureWorks Ingeo biopolymer, amorphous sheet, 25 °C
Heats up and cools (diffusivity)not sourced0.0874mm²/s
Thermal shock resistancenot sourcednot sourced
Melting pointnot sourced152°Csourcetypical
Glass transitionnot sourced59.1°Csourcetypical
Max service temperaturenot sourced58.8°CsourceHDT 0.455 MPa (printed specimens)
Values forA whole circuit board read as one orthotropic plate: the JEDEC high-K thermal test board (JESD51-7, "2s2p"), 0.062 in (1.575 mm) thick with two internal solid copper planes 0.0014 in (1 oz) thick, as Texas Instruments SZZA017A Table 1 gives it. Copper C110 and the Isola 370HR laminate from this library; the layers conduct in parallel along the board and in series through it (boardStackup.ts). Its two 0.0028 in trace layers cover little of the board and are left out; vias are ignored. Mechanical values are the bare laminate's.Ultimaker PLA, 3D-printed specimens, XY (flat) orientation; Ultimaker S5 Pro, engineering intent profile, 0.15 mm layer height, AA 0.4 print core, 100% infill, Cura 4.9, printed one-at-a-time, conditioned >=24 h at room temperature. TDS dated April 20, 2022.

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.

Plastic PLA is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Is PCB Board FR-4, 2 copper planes stronger than Plastic PLA?

PCB Board FR-4, 2 copper planes is stronger: its tensile strength is 315 MPa against yield strength 52.5 MPa for Plastic PLA (6.01x).

Which is stiffer, PCB Board FR-4, 2 copper planes or Plastic PLA?

PCB Board FR-4, 2 copper planes is stiffer: Young's modulus 23.9 GPa against 3.25 GPa for Plastic PLA, so the same part in PCB Board FR-4, 2 copper planes deflects less under the same load.

Among 73 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic 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-4VBrass C260Nickel 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 PBT GF30Plastic PPS GF40Plastic LCP GF30Plastic PLA
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic 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-4VBrass C260Nickel 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 PBT GF30Plastic PPS GF40Plastic LCP GF30Plastic PLA
Strength against density

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