G3 Glass Phenolic Rods

Product Description:

Brand: YILONG

Materials: Phenolic Resin + Glassfiber Cloth

Density: 1.8-2.0 g/cm³

Color: Reddish Brown

Diameter: 6mm-200mm

Length: 1000mm

Temperature Index: 180

Thermal Class: H

Flammability: HB

Packaging: Pallet, Wooden Box

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product details

Description

G3 Glass Phenolic Rods are engineered from a high-quality composite of glass fiber and phenolic resin, offering a balance of mechanical strength, thermal stability, and excellent electrical insulation. These rods are durable, wear-resistant, and suitable for high-voltage applications and industrial environments requiring both strength and reliability.

Features

High mechanical strength and wear resistance
Excellent thermal resistance for high-temperature operation
Superior electrical insulation properties
Durable and dimensionally stable under mechanical stress
Suitable for machining and custom fabrication

Applications

High-voltage electrical equipment
Transformers and switchgear components
Structural and insulating parts in industrial machinery
Precision components in harsh or high-temperature environments
Custom machined parts requiring strength and insulation

Technical Data Sheet

Test / Property	Unit	G-3	G-5/G9	G-7	G-10	G-11	G-11H
PHYSICAL
Density	g/cm³	1.8	1.85	1.8	1.8	1.8	1.9
Water Absorption, 24 hrs	%	2.65	0.6	0.1	0.1	0.2	0.2
MECHANICAL
Tensile Strength – lengthwise	MPa	289	425	138	310	296	280
Tensile Strength – crosswise	MPa	234	352	-	262	255	250
Flexural Strength – lengthwise	MPa	279	425	207	517	552	372
Flexural Strength – crosswise	MPa	234	352	-	448	483	124
Flexural Modulus – lengthwise	GPa	12.4	13.8	11	18.6	20.7	14
Flexural Modulus – crosswise	GPa	9.7	11.7	-	16.6	18.6	12
Izod Notched Impact – lengthwise	kJ/m²	0.64	0.67	0.64	0.71	0.61	16
Izod Notched Impact – crosswise	kJ/m²	0.59	0.45	-	0.61	0.46	14
Compressive Strength	MPa	379	448	345	448	434	346
Hardness, Rockwell M	—	110	115	105	110	112	112
THERMAL
Coefficient of Linear Thermal Expansion – lengthwise	10⁻⁶ / °C	1.46	1.27	1.15	0.88	1.15	15
Coefficient of Linear Thermal Expansion – crosswise	10⁻⁶ / °C	1.76	1.45	1.38	0.88	1.27	20
Max Operating Temperature	°C	180	140	220	140	165	180
Thermal Class	/	H	B	C	B	F	H
Flammability Rating	UL94	HB	V-0	V-0	HB	HB	HB
Thermal Conductivity	W/m·K	0.29	0.29	0.29	0.29	0.29	0.25
ELECTRICAL
Dielectric Strength (short time, 1/8" thick)	kV/mm	18.1	11.8	13.8	31.5	35.4	16
Dielectric Constant at 1 MHz	—	7.3	6.3	4.5	5	4.5	4.8
Dissipation Factor at 1 MHz	—	0.023	0.019	0.018	0.019	0.02	0.02
Arc Resistance	s	180	180	240	100	120	120

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G3 Glass Phenolic Rods for Electrical Insulation and Mechanical Use