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 3FR4 - 4.250" 36 x 48 Natural Sheet - view 4FR4 - 4.250" 36 x 48 Natural Sheet - view 5
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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
Thickness4.25Standard
Width36Standard
Length48Standard
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
Ships same day if ordered by 2pm
Quality guaranteed
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.