X Grade Phenolic Sheet | Paper Phenolic Insulation Material

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X G11 Sheet

122 SKUs•39 sizes

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118 sizes · 122 SKUs

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Short Description	Color	Thickness	Width	Length	Stock	Price
X - 0.015" 36 x 48 Natural Sheet	Natural	0.015″	36″	48″	Out of stock	$6.63per sheet
X - 0.015" 48 x 48 Natural Sheet	Natural	0.015″	48″	48″	Out of stock	$8.84per sheet
X - 0.015" 48 x 96 Natural Sheet	Natural	0.015″	48″	96″	Out of stock	$26.59per sheet
X - 0.016" 36 x 48 Natural Sheet	Natural	0.016″	36″	48″	Out of stock	$7.02per sheet
X - 0.016" 48 x 48 Natural Sheet	Natural	0.016″	48″	48″	Out of stock	$9.28per sheet
X - 0.016" 48 x 96 Natural Sheet	Natural	0.016″	48″	96″	Out of stock	$27.57per sheet
X - 0.020" 36 x 48 Natural Sheet	Natural	0.020″	36″	48″	Out of stock	$8.33per sheet
X - 0.020" 48 x 48 Natural Sheet	Natural	0.020″	48″	48″	Out of stock	$11.10per sheet
X - 0.020" 48 x 96 Natural Sheet	Natural	0.020″	48″	96″	Out of stock	$33.20per sheet
X - 0.025" 36 x 48 Natural Sheet	Natural	0.025″	36″	48″	Out of stock	$10.44per sheet

Showing 1 to 10 of 122 SKUs

Paper phenolic Grade X is a thermoset laminate made from layers of kraft paper impregnated with phenolic resin and cured under heat and pressure into rigid phenolic sheet and rod stock. As the entry-level grade in the paper phenolic family governed by NEMA LI-1, Grade X is the most economical option for applications requiring basic electrical insulation, consistent dimensional stability, and easy machinability — without the higher dielectric demands that justify upgrading to XX or XXX.

Grade X provides 35,000 psi tensile strength, 34,000 psi flexural strength, and 17,000 psi compressive strength with a Rockwell M120 hardness — the highest hardness in the paper phenolic family. Water absorption is 2.00% over 24 hours. Maximum continuous operating temperature reaches 280°F (140°C). This x grade paper phenolic sheet machines cleanly into terminal blocks, panel spacers, coil forms, fixture plates, and light-duty structural insulating components where cost efficiency is a priority.

Standards. Grade X is governed by NEMA LI-1. Flammability is rated 94HB per UL 94. Test methods follow ASTM D709 for laminated thermosetting materials. The X designation identifies the base paper phenolic grade — the starting point of a three-level NEMA hierarchy that steps up through XX to XXX for increasing electrical performance.

Sister grades. Step up to Grade XX — paper phenolic, standard electrical grade when your application requires more consistent dielectric performance for switchboards and control panels. Choose Grade XXX — paper phenolic, premium electrical grade for the highest dielectric strength and lowest moisture absorption in the family. When impact strength and mechanical toughness matter more than cost, see cotton phenolic grades.

Phenolic Grade XX

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X G11 Sheet

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