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PCB Board FR-4, 2 copper planes vs. SLA Resin Tough 2000

Compare PCB Board FR-4, 2 copper planes vs. SLA Resin Tough 2000 strength, stiffness, weight and thermal properties.

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PCB Board FR-4, 2 copper planesComposite
SLA Resin Tough 20003D printed (SLA resin)
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Mechanical
Yield strengthnot given (tensile used)40.4MPasourcetypical
Ultimate tensile strength246–385MPasourcethe bare laminate's (fr4-370hr), in-plane: cross direction .. length direction (ASTM D3039)40.4MPasourcetypical
Flexural strengthnot sourced67MPasourcetypical
Elongation at breaknot sourced79%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 out1.8GPasourcetypical
Densitynot sourced1,090kg/m³sourcetypical
Strength to weightnot sourced37.1kN·m/kg
Stiffness to weightnot sourced1.65MN·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 sourced1,285m/s
Thermal
Thermal conductivitynot sourcednot sourced
Thermal expansion13–14µm/m·Ksourcethe bare laminate's (fr4-370hr), in-plane X/Y-axis, below Tg (IPC-TM-650 2.4.24C)134µm/m·Ksourcemean 0-150 °C
100 mm part over a 50 °C swing67.5µm growth9.94x less671µm growth
Specific heatnot sourcednot sourced
Heats up and cools (diffusivity)not sourcednot sourced
Thermal shock resistancenot sourcednot sourced
Glass transitionnot sourced112°CsourceDMA
Max service temperaturenot sourced57°CsourceHDT 1.8 MPa
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.Formlabs Tough 2000 Resin V2 (FLTO2002), TDS Rev. 01 10/06/2025; printed on Form 4 at 100 µm, washed in Form Wash V2 10+5 min in >=99% IPA, post-cured 70 °C for 12 min in Form Cure V2. Orientation not stated.

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.

SLA Resin Tough 2000 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 SLA Resin Tough 2000?

PCB Board FR-4, 2 copper planes is stronger: its tensile strength is 315 MPa against yield strength 40.4 MPa for SLA Resin Tough 2000 (7.81x).

Which is stiffer, PCB Board FR-4, 2 copper planes or SLA Resin Tough 2000?

PCB Board FR-4, 2 copper planes is stiffer: Young's modulus 23.9 GPa against 1.8 GPa for SLA Resin Tough 2000, so the same part in PCB Board FR-4, 2 copper planes deflects less under the same load.

Which expands less with temperature?

PCB Board FR-4, 2 copper planes expands less: 13.5 µm/m·K against 134 µm/m·K for SLA Resin Tough 2000.

Among 73 materials

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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-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 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 GF30SLA Resin Tough 2000
Strength against density

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