Ryertex is a family of fiber reinforced plastic composites used as electrical insulation or to replace metal in wear applications where high speed, load, and temperatures are involved, or where there tends to be a loss of lubrication. Ryertex is used in industrial applications including wear plates and fiber bearings in steel and aluminum mills, copper processing, paper and lumber mills, oil and gas, mining, military, aerospace, rail/locomotive, off-road and construction equipment.

The Ryertex line includes all NEMA grades with common substrate/resin combinations including glass epoxy, glass phenolic, and multiple combinations of canvas phenolic. Other substrates include paper, linen and aramid fiber while melamine and silicone can also be used for the resin systems. One of the most common grades that we see includes the fiberglass composite FR4 due to its high strength and thermal properties. Ryertex C is known in many places by the generic name “Micarta” and may be the most common wear material used in industrial settings.

While Ryertex is a globally recognized brand name, there are a number of other names in the marketplace that are also thermoset laminate composites. These include: Micarta, Bakelite, “Phenolic”, Resiten, Garolite, Acculam, Lamitex, Gatke, Scan Pac, Spauldite, Phenolex, Textolite, Tufnol, Laminex, Schwartz, Current, and Synthane. WS Hampshire can cross reference your requirements to the corresponding Ryertex offering.

Thermoset laminates were first developed by Leo Baekeland in 1907 when he introduced Bakelite, a non-flammable thermoset utilizing phenolic resin with a paper substrate. This material has been used in everything from engine parts to jewelry to electronics. Products that were originally made from Bakelite include telephone mouth and ear pieces, buttons, and frying pan handles.

Ryertex was first introduced in the 1930’s as a metal replacement. Demand grew shortly thereafter as World War II put a strain on the nation’s metal supply and Ryertex was quickly seen as a viable option in a wide variety of industrial applications.

Today, Ryertex is a trade name of WS Hampshire who has built an outstanding reputation for producing high quality, custom fabricated parts for use in many industrial applications including bearings, bushings, and other wear parts.

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			Grade	223	C	CE	CG	HDA	HDM	L	LE	G3	G5	G7	G9	FR4	G11	S/T	X
			Applications	Mechanical grade, piston & packing rings, pump valve, doctor blades, stave and rudder bearings for marine industry.	Mechanical grade, gears, pinions, spacers, structural, bearings, bushings, wear parts, electrical insulation.	Mechanical/Electrical grade, small gears, pinions, radio parts, marine switch board panels, electrical insulation.	Mechanical grade, bearings, bushings, wear parts where self lubrication and low coefficient of friction is necessary.	Heavy industrial applications for bearings, bushings and wear parts that encounter high energy loads as the material possesses improved impact resistance and does not fatigue from repeated shock loads.	Heavy industrial applications for bearings, bushings and wear parts that encounter high energy loads as the material possesses improved impact resistance and does not fatigue from repeated shock loads. Moly has been added to provide self lubricating properties.	Mechanical grade, fine tooth gears, radio parts, terminal boards where tight tolerance and improved surface finish are required.	Electrical/mechanical grade, marine relay bases, terminal bases & strips, radio parts, high humidity applications, electrical insulation	Mechanical grade, high temperature, low moisture absorption, gaskets, seals, structural, industrial wear parts	Electrical/Mechanical grade, switch board panels, arc barriers, circuit breaker parts, structural & electrical parts, electrical insulation	Electrical grade, class H insulation, heating/appliance insulation, electrical insulation	Electrical/Mechanical Grade, marine switch board panels, structural parts, electrical insulation	Electrical/mechanical grade, high humidity applications, power generation and transmission, electrical insulation, industrial wear parts	Electrical /Mechanical grade, rotor slot insulation, structural members at elevated temperatures, UL listed, electrical insulation	Mechanical grade, high temperature, self lubricating bearings, bushings, wear parts.	Mechanical grade, terminal boards, structural parts, switch bases, washers, panels, electrical insulation
			Substrate	Canvas	Canvas	Canvas	Canvas	Canvas	Canvas	Linen	Linen	Fiberglass	Fiberglass	Fiberglass	Fiberglass	Fiberglass	Fiberglass	Aramid	Paper
			Resin	Phenolic	Phenolic	Phenolic	Phenolic	Phenolic	Phenolic	Phenolic	Phenolic	Phenolic	Melamine	Silicone	Melamine	Epoxy	Epoxy	Phenolic	Phenolic
			Modifier	–	–	–	Graphite	Alumina	Molybdenum Disulfide	–	–	–	–	–	–	–	–	Molybdenum Disulfide	–
			Mil Spec	MIL-P-18324D, ADM2	MILI-24768/16FBM	MIL-I-24768/14	–	–	–	MIL-I-24768/15	MIL-I-24768/13FBE	MIL-I-24768/18	MIL-I-24768/8GMG	MIL-I-24768/18	MIL-I-24768/1GME	MIL-I-24768/27 Type GEE-F	MIL-I-24768/3 Type GEB	–	MIL-I-24768/12PBM
			NEMA	–	C	CE	–	–	–	L	LE	G3	G5	G7	G9	FR4	G11	–	X
			Form	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet	Sheet
	Property	Test	Units
Physical properties	Specific Gravity	ASTM D792	–	1.44	1.37	1.37	1.40	1.42	1.40	1.34	1.34	1.80	1.90	1.88	1.90	1.85	1.80	1.54	1.40
	Rockwell Hardness	ASTM D785 .250″ build up	M Scale	105	100	100	90	95	80	100	100	110	115	100	115	–	112	95	90
	Moisture Absorbtion	ASTM D570 Condition A	%	1.20	3.50	2.00	2.20	0.06	0.08	2.30	–	2.00	0.50	0.19	0.50	0.10	0.20	–	–
		ASTM D570 Condition D1-24/23	%	–	–	–	–	–	–	–	1.9	–	–	–	–	–	–	1.94	0.58
		IEC 60893-2/8.2 Condition A	mg	–	–	–	–	–	–	–	–	–	–	–	–	8.3	–	–	–
	Flexural Strength	ASTM D790 Condition A, LW/CW	psi	18,000	18,000/17,000	17,500/15,000	19,000/15,000	20,200/13,600	16,200/12,700	24,500/18,500	22,000/16,000	55,000/50,000	70,500/63,200	24,300/21,700	70,500/63,200	65,000/52,000	68,100/61,300	36,700/17,500	34,000/28,000
		ASTM D790 Condition E-1/150: T-150, LW/CW	psi	–	–	–	–	–	–	–	–	–	–	–	–	–	40,000	29,200/15,500	–
		IEC 60893-2.5.1 Condition A, LW/CW	–	–	–	–	–	–	–	–	–	–	–	–	–	480/390	–	–	–
	Flextural Modulus	ASTM D790 Condition A, LW/CW	kpsi	–	1,600/1,500	1,600/1,500	1,200/1,000	1,358/1,034	937/818	1,700/1,300	1,600/1,200	1,800/1,400	2,000/1,700	–	2,000/1,700	2,900/2,600	3,000/2,700	–	1,900/1,400
	Tensile Strength	ASTM D638 Condition A, LW/CW	psi	12,000	12,000/9,700	11,000/9,000	10,000/7,000	11,400/11,300	10,200/6,300	14,000/10,000	13,000/9,000	42,000/34,000	50,000/35,000	–	50,000/35,000	40,000/32,000	43,000/37,000	25,600/9,700	17,000/13,000
	Flextural Modulus	ASTM D790 Condition A, LW/CW	kpsi	–	1,600/1,500	1,600/1,500	1,200/1,000	1,358/1,034	937/818	1,700/1,300	1,600/1,200	1,800/1,400	2,000/1,700	–	2,000/1,700	2,900/2,600	3,000/2,700	–	1,900/1,400
	Izod Impact Strength	ASTM D256 Condition A, LW/CW	ft-lb/in	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
		ASTM D256 Condition E-48/50, LW/CW	ft-lb/in	2.00/1.2	3.10/2.70	1.70/1.5	1.7/1.4	6.36/2.83	6.00/2.89	1.70/1.35	1.35/1.10	12.0/11.0	16.50/12.50	17.00/11.50	16.50/12.50	7.90/7.30	12.0/9.0	22.90/7.30	.82/.76
		IEC 60893-2.5.4.3 Condition A, LW/CW	–	–	–	–	–	–	–	–	–	–	–	–	–	58/55	–	–	–
	Charpy Impact Strength	IEC 60893-2.5.4.2 Condition A LW/CW	kJ/m2	–	–	–	–	–	–	–	–	–	–	–	–	63/50	–	–	–
	Compressive Strength	ASTM D695 Condition A, Flatwise	psi	38,000	34,000	34,000	38,000	36,500	34,000	38,000	36,000	76,000	85,000	–	85,000	66,000	72,500	40,700	35,000
	Compressive Modulus	ASTMD695 Condition A	kpsi	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
	ASTM D229 Condition A	ASTM D229 Condition A	lb	1,700	2,500	1,700	1,800	2,300	2,100	2,000	1,900	1,500	1,900	750	1,900	2,300	1,900	2,400	1,000
	ASTM D229 Condition A	ASTM D229 Condition D-48/50	lb	–	2,300	1,700	–	2,100	2,000	–	–	–	–	–	–	–	–	–	–
	Shear Strength	ASTM D732 Condition A, Perpendicular	psi	13,000	14,000	14,000	13,000	13,900	12,200	13,500	13,500	18,000	18,000	–	18,000	21,500	22,000	–	15,000
Thermal Properties	Temperature Index	UL Bulletin 746b Electrical/Mechanical	°C	125	115/125	115/125	125	125	125	115/125	125	140/170	140	170/220	140	130/140	170/180	165	130/130
	Tg by DMA	Condition A	°C	–	–	–	–	–	–	–	–	–	–	–	–	130	180	–	–
	Coefficient of Thermal Expansion	IPC-TM 650-2.4.24 X-axis/Y-axis	“/”°Cx10-6	–	20.0/22.0	20/22	18/24	19.5/27.6	26.4/39.4	18.0/19.0	18.0/19.1	15.0/18.0	15.0/18.0	–	15.0/18.0	10.0/13.0	13/15	27.0/39.8	13.0/17.0
	Flammability Rating	UL Bulliten 94 Condition A	Class	HB	HB	HB	HB	HB	HB	HB	HB	HB	–	–	–	–	HB	–	HB
	Flammability Vertical	IEC60893-2/7.2 Condition A	Class	–	–	–	–	–	–	–	–	–	V-0	V-0	V-0	V-0	–	–	–
Electrical Properties	Breakdown Voltage	ASTM D149 Condition A	kVolts	–	20	40	–	–	–	45	50	55	70	55	70	66	60	–	40
		ASTM D149 Condition D-48/50	kVolts	–	5	3	–	–	–	2	5	40	65	32	65	65	55	–	–
		ASTM D149 Condition D-336/50	kVolts	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
		IEC 60893-2/6.1 Condition A	kV	–	–	–	–	–	–	–	–	–	–	–	–	65	–	–	–
	Electric Strength	ASTM D149 Condition A	Volts/mil	–	400	550	–	–	–	575	625	600	540	350	540	630	700	–	600
		ASTM D149 Condition D-48/50	Volts/mil	–	150	300	–	–	–	450	500	580	550	–	550	670	720	–	–
		IEC 60893-2/6.1 Condition A	–	–	–	–	–	–	–	–	–	–	–	–	–	25	–	–	–
	Insulation Resistance	IEC 60893-2/6.3 Condition E-24/50:D-24/23	MΩ	–	–	–	–	–	–	–	–	–	–	–	–	3.33×1013	–	–	–
	Arc Resistance	ASTM D495 Condition A	sec	–	15	15	–	–	–	15	15	100	185	200	185	130	120	–	90
	Comparative Tracking Index	ASTM D3638	Volts/mil	–	155	–	–	–	–	170	170	150	600	–	600	600	150	–	–
	Dissipation Factor @ 1 MHz	ASTM D150 Condition A	–	–	–	–	–	–	–	–	–	–	–	0.018	–	–	–	–	–
	Dissipation Factor @ 1 MHz	ASTM D150 Condition D-24/23	–	–	–	–	–	–	–	0.07	0.065	–	7.03	0.045	7.03	0.032	0.02	–	–
	Relative Permittivity @ 1 MHz	Condition A	–	–	–	–	–	–	–	–	–	–	–	4.55	–	–	–	–	–
		Condition D-24/23	–	–	–	–	–	–	–	5.8	5.5	–	–	4.67	–	4.8	–	–	–
		Condition D-48/50	–	–	–	–	–	–	–	–	–	–	–	–	–	–	4.8	–	–

This data, while believed to be accurate and based on reliable analytical methods, is for informational purposes only. Data supplied is “typical values” and not to be considered “specification values.” In order to assure that the material’s performance is adequate for a specific application, it is recommended that customers independantly verify characteristics of interest.

Tube Only

			Grade	C	CG	HDA	HDM	LE	G3	G5	G7	G9	G10	S/T
			Applications	Mechanical grade, gears, pinions, spacers, structural, bearings, bushings, wear parts, electrical insulation.	Mechanical grade, bearings, bushings, wear parts where self lubrication and low coefficient of friction is necessary.	Heavy industrial applications for bearings, bushings and wear parts that encounter high energy loads as the material possesses improved impact resistance and does not fatigue from repeated shock loads.	Heavy industrial applications for bearings, bushings and wear parts that encounter high energy loads as the material possesses improved impact resistance and does not fatigue from repeated shock loads. Moly has been added to provide self lubricating properties.	Electrical/mechanical grade, marine relay bases, terminlal bases & strips, radio parts, high humidity applications, electrical insulation	Mechanical grade, high temperature, low moisture absorbtion, gaskets, seals, structural, industrial wear parts	Electrical/Mechanical grade, switch board panels, arc barriers, circuit breaker parts, structural & electrical parts, electrical insulation	Electrical grade, class H insulation, heating/appliance insulation, electrical insulation	Electrical/Mechanical Grade, marine switch board panels, structural parts, electrical insulation	Electrical/Mechanical grade, terminal boards, high humidity applications, UL listed a 65M38 unclad, electrical insulation, foil lined material used in cryogenic insulation	Mechanical grade, high temperature, self lubricating bearings, bushings, wear parts.
			Substrate	Canvas	Canvas	Canvas	Canvas	Linen	Fiberglass	Fiberglass	Fiberglass	Fiberglass	Fiberglass	Aramid
			Resin	Phenolic	Phenolic	Phenolic	Phenolic	Epoxy	Phenolic	Melamine	Silicone	Melamine	Epoxy	Phenolic
			Modifier	–	Graphite	Alumina	Molybdenum Disulfide	–	–	–	–	–	–	Molybdenum Disulfide
			Mil Spec	MILI-24768/16FBM	–	–	–	MIL-I-24768/13FBE	MIL-I-24768/18	MIL-I-24768/8GMG	MIL-I-24768/18	MIL-I-24768/1GME	MIL-I-24768-2	–
			NEMA	C	–	–	–	LE	G3	G5	G7	G9	G10	–
			Form	Tube	Tube	Tube	Tube	Tube	Tube	Tube	Tube	Tube	Tube	Tube
	Property	Test	Units
Physical properties	Specific Gravity	ASTM D792	–	1.30	1.28	1.33	1.34	1.33	1.80	1.88	1.93	1.95	1.80	1.35
	Rockwell Hardness	ASTM D785 .250″ build up	M Scale	90	90	74	80	110	105	120	95	115	110	70
	Moisture Absorbtion	ASTM D570 Condition A	%	2.00	2.10	1.10	1.30	–	–	–	–	–	–	1.10
		ASTM D570 Condition D1-24/23	%	–	–	–	–	1.15	0.2	0.8	0.1	1.0	0.14	–
		IEC 60893-2/8.2 Condition A	mg	–	–	–	–	–	–	–	–	–	–	–
	Flexural Strength	ASTM D790 Condition A, LW/CW	psi	–	–	–	–	–	–	–	–	–	–	11,000/8,700
		ASTM D790 Condition E-1/150: T-150, LW/CW	psi	–	–	–	–	–	–	–	–	–	–	–
		IEC 60893-2.5.1 Condition A, LW/CW	–	–	–	–	–	–	–	–	–	–	–	–
	Flextural Modulus	ASTM D790 Condition A, LW/CW	kpsi	–	–	–	–	–	–	–	–	–	–	750/500
	Tensile Strength	ASTM D638 Condition A, LW/CW	psi	7,700	7,900	4,100	5,500	10,000	38,500	27,000	23,500	26,500	39,500	7,400
	Izod Impact Strength	ASTM D256 Condition A, LW/CW	ft-lb/in	–	–	–	–	–	–	–	–	–	–	–
		ASTM D256 Condition E-48/50, LW/CW	ft-lb/in	–	–	–	–	–	–	–	–	–	–	–
		IEC 60893-2.5.4.3 Condition A, LW/CW	–	–	–	–	–	–	–	–	–	–	–	–
	Charpy Impact Strength	IEC 60893-2.5.4.2 Condition A LW/CW	kJ/m2	–	–	–	–	–	–	–	–	–	–	–
	Compressive Strength	ASTM D695 Condition A, Flatwise	psi	25,500	24,000	22,000	18,500	30,000	38,000	26,500	12,000	33,500	42,500	20,000/30,000
	Compressive Modulus	ASTMD695 Condition A	kpsi	350	415	360	350	380	850	1,000	290	1,000	1,100	600/440
	Bonding Strength	ASTM D229 Condition A	lb	–	–	–	–	–	–	–	–	–	–	–
	Bonding Strength	ASTM D229 Condition D-48/50	lb	–	–	–	–	–	–	–	–	–	–	–
	Shear Strength	ASTM D732 Condition A, Perpendicular	psi	–	–	–	–	–	–	–	–	–	–
Thermal Properties	Temperature Index	UL Bulletin 746b Electrical/Mechanical	°C	140/140	140	140	140	135	180/160	150	170/220	150	200	165
	Tg by DMA	Condition A	°C	–	–	–	–	–	–	–	–	–	≥170	–
	Coefficient of Thermal Expansion	IPC-TM 650-2.4.24 X-axis/Y-axis	“/”°Cx10-6	–	–	–	–	–	–	–	–	–	–	–
	Flammability Rating	UL Bulliten 94 Condition A	Class	HB	HB	HB	HB	HB	HB	V-0	V-0	V-0	HB	–
	Flammability Vertical	IEC60893-2/7.2 Condition A	Class	–	–	–	–	–	–	–	–	–	–	–
Electrical Properties	Breakdown Voltage	ASTM D149 Condition A	kVolts	–	–	–	–	–	–	–	–	55	60	–
		ASTM D149 Condition D-48/50	kVolts	–	–	–	–	–	–	–	–	30	65	–
		ASTM D149 Condition D-336/50	kVolts	–	–	–	–	–	–	–	–	50	–	–
		IEC 60893-2/6.1 Condition A	kV	–	–	–	–	–	–	–	–	–	–	–
	Electric Strength	ASTM D149 Condition A	Volts/mil	135	–	–	–	285	400	315	185	350	400	–
		ASTM D149 Condition D-48/50	Volts/mil	–	–	–	–	220	350	315	120	340	380	–
		IEC 60893-2/6.1 Condition A	–	–	–	–	–	–	–	–	–	–	–	–
	Insulation Resistance	IEC 60893-2/6.3 Condition E-24/50:D-24/23	MΩ	–	–	–	–	–	–	–	–	–	–	–
	Arc Resistance	ASTM D495 Condition A	sec	–	–	–	–	–	–	–	–	–	–	–
	Comparative Tracking Index	ASTM D3638	Volts/mil	–	–	–	–	–	–	–	–	–	–	–
	Dissipation Factor @ 1 MHz	ASTM D150 Condition A	–	–	–	–	–	–	–	–	–	–	0.024	–
	Dissipation Factor @ 1 MHz	ASTM D150 Condition D-24/23	–	–	–	–	–	–	–	–	–	–	0.034	–
	Relative Permittivity @ 1 MHz	Condition A	–	–	–	–	–	–	–	–	–	–	4.39	–
		Condition D-24/23	–	–	–	–	–	–	–	–	–	–	–	–
		Condition D-48/50	–	–	–	–	–	–	–	–	–	–	4.46	–

Ryertex -Fiber Reinforced Composites