Ready Plastics
FR4SheetNatural

FR4 - 4.250" 36 x 48 Natural Sheet - 4.25 in × 36 in × 48 in Sheet

4.25 in × 36 in × 48 in Sheet

FR4 - 4.250" 36 x 48 Natural SheetFR4 - 4.250" 36 x 48 Natural Sheet - view 2FR4 - 4.250" 36 x 48 Natural Sheet - view 3
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This FR4 sheet measures 4.25″ thick, 36″ × 48″, finished in natural. Available to order — price $6881.16 per Each.

SpecificationValueTolerance
Shape / FormSheet
Thickness4.25″Standard
Width36″Standard
Length48″Standard
ColorNatural
Weight490.836 lbs
About This Product

Built for demanding electrical and structural applications, this FR4 Glass Epoxy sheet comes in a substantial 4.25" thickness and a full 36.0" x 48.0" sheet size in Natural color. The extra-thick profile delivers outstanding rigidity and dimensional stability, while FR4’s inherent electrical insulation, moisture resistance, and dependable machinability make it a strong choice for heavy-duty fabricated components and support panels.

Specifications

Shape

Sheet

Thickness

4.25 in

Width

36 in

Length

48 in

Weight

490.836 lbs

Color

Natural

Unit of Measure

Each

Other FR4 sizes

← All FR4stock & specs

Price

$6881.16 / Each

In Stock
21010 available
Available at 11 locations

$150 order minimum

Ships same day if ordered by 2pm
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Quick Info
CategoryFR4
FormSheet
Thickness4.25 in
Width36 in
Length48 in
Weight490.836 lbs

Typical Properties — FR4 - 4.250" 36 x 48 Natural Sheet

Glass Epoxy Fr4
Mechanical
PropertyTest MethodUnitValue
Tensile strengthpsi / MPa65,000 / 445
Compressive strengthpsi / MPa38,000 / 260
Flexural strength (LW -A 0.125″)psi / MPa60,000 / 410
Bond strengthpsi / MPa2,300 / 15
Shear strengthpsi / MPa21,500 / 145
Hardness (M scale)115
Izod impact strength at 49°C (LW)14.00
General
DescriptionValue
Specific gravity1.85
Flammability rating94V-0
Water absorption (24 hours)0.10
Operating Environment
PropertyTest MethodUnitValue
Maximum temperature°C / °F140 / 280

Typical properties are provided for reference only. Values may vary based on processing conditions, form factor, and lot. Contact Ready Plastics for certified test data.