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 Products that were originally made from Bakelite include telephone mouth and ear pieces, buttons, and frying pan handles.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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Sheet Only

Material

Grade	Substrate	Resin	Modifier	Mil Spec	NEMA	Form	Applications
223	Canvas	Phenolic	–	MIL-P-18324D, ADM2	–	Sheet	Mechanical grade, piston & packing rings, pump valve, doctor blades, stave and rudder bearings for marine industry.
C	Canvas	Phenolic	–	MILI-24768/ 16FBM	C	Sheet	Mechanical grade, gears, pinions, spacers, structural, bearings, bushings, wear parts, electrical insulation.
CE	Canvas	Phenolic	–	MIL-I-24768/14	CE	Sheet	Mechanical/Electrical grade, small gears, pinions, radio parts, marine switch board panels, electrical insulation.
CG	Canvas	Phenolic	Graphite	–	–	Sheet	Mechanical grade, bearings, bushings, wear parts where self lubrication and low coefficient of friction is necessary.
HDA	Canvas	Phenolic	Alumina	–	–	Sheet	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.
HDM	Canvas	Phenolic	Molybdenum Disulfide	–	–	Sheet	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.
L	Linen	Phenolic	–	MIL-I-24768/15	L	Sheet	Mechanical grade, fine-tooth gears, radio parts, terminal boards where tight tolerance and improved surface finish are required.
LE	Linen	Phenolic	–	MIL-I-24768/13FBE	LE	Sheet	Electrical/mechanical grade, marine relay bases, terminal bases & strips, radio parts, high humidity applications, electrical insulation.
G3	Fiberglass	Phenolic	–	MIL-I-24768/18	G3	Sheet	Mechanical grade, high temperature, low moisture absorption, gaskets, seals, structural, industrial wear parts.
G5	Fiberglass	Melamine	–	MIL-I-24768/ 8GMG	G5	Sheet	Electrical/Mechanical grade, switchboard panels, arc barriers, circuit breaker parts, structural & electrical parts, electrical insulation.
G7	Fiberglass	Silicone	–	MIL-I-24768/18	G7	Sheet	Electrical grade, class H insulation, heating/appliance insulation, electrical insulation.
G9	Fiberglass	Melamine	–	MIL-I-24768/ 1GME	G9	Sheet	Electrical/Mechanical Grade, marine switchboard panels, structural parts, electrical insulation.
FR4	Fiberglass	Epoxy	–	MIL-I-24768/27 Type GEE-F	FR4	Sheet	Electrical/mechanical grade, high humidity applications, power generation and transmission, electrical insulation, industrial wear parts.
G11	Fiberglass	Epoxy	–	MIL-I-24768/3 Type GEB	G11	Sheet	Electrical /Mechanical grade, rotor slot insulation, structural members at elevated temperatures, UL listed, electrical insulation.
S/T	Aramid	Phenolic	Molybdenum Disulfide	–	–	Sheet	Mechanical grade, high temperature, self-lubricating bearings, bushings, wear parts.
X	Paper	Phenolic		MIL-I-24768/12PBM	X	Sheet	Mechanical grade, terminal boards, structural parts, switch bases, washers, panels, electrical insulation.

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.

Physical

	Specific Gravity	Rockwell Hardness	Moisture Absorption			Flexural Strength			Flexural Modulus	Tensile Strength	Flexural Modulus	Izod Impact Strength			Charpy Impact Strength	Compressive Strength	Compressive Modulus	ASTM D229 Condition A		Shear Strength
Test	ASTM D792	ASTM D785 .250″ build up	ASTM D570 Condition A	ASTM D570 Condition D1-24/23	IEC 60893-2/8.2 Condition A	ASTM D256 Condition A, LW/CW	ASTM D256 Condition E-48/50, LW/CW	IEC 60893-2.5.1 Condition A, LW/CW	ASTM D790 Condition A, LW/CW	ASTM D638 Condition A, LW/CW	ASTM D790 Condition A, LW/CW	ASTM D256 Condition A, LW/CW	ASTM D256 Condition E-48/50, LW/CW	IEC 60893-2.5.4.3 Condition A, LW/CW	IEC 60893-2.5.4.2 Condition A LW/CW	ASTM D695 Condition A, Flatwise	ASTMD695 Condition A	ASTM D229 Condition A	ASTM D229 Condition D-48/50	ASTM D732 Condition A, Perpendicular
Units	–	M Scale	%	%	mg	psi	psi	–	kpsi	psi	kpsi	ft-lb/in	ft-lb/in	–	kJ/m2	psi	kpsi	lb	lb	psi
223	1.44	105	1.2	–	–	18000	–	–	–	12000	–	–	2.00/ 1.2	–	–	38000	–	1700	–	13000
C	1.37	100	3.5	–	–	18,000/ 17,000	–	–	1,600/ 1,500	12,000/ 9,700	1,600/ 1,500	–	3.10/ 2.70	–	–	34000	–	2500	2300	14000
CE	1.37	100	2	–	–	17,500/ 15,000	–	–	1,600/ 1,500	11,000/ 9,000	1,600/ 1,500	–	1.70/ 1.5	–	–	34000	–	1700	1700	14000
CG	1.4	90	2.2	–	–	19,000/ 15,000	–	–	1,200/ 1,000	10,000/ 7,000	1,200/ 1,000	–	1.7/ 1.4	–	–	38000	–	1800	–	13000
HDA	1.42	95	0.06	–	–	20,200/ 13,600	–	–	1,358/ 1,034	11,400/ 11,300	1,358/ 1,034	–	6.36/ 2.83	–	–	36500	–	2300	2100	13900
HDM	1.4	80	0.08	–	–	16,200/ 12,700	–	–	937/ 818	10,200/ 6,300	937/ 818	–	6.00/ 2.89	–	–	34000	–	2100	2000	12200
L	1.34	100	2.3	–	–	24,500/ 18,500	–	–	1,700/ 1,300	14,000/ 10,000	1,700/ 1,300	–	1.70/ 1.35	–	–	38000	–	2000	–	13500
LE	1.34	100	–	1.9	–	22,000/ 16,000	–	–	1,600/ 1,200	13,000/ 9,000	1,600/ 1,200	–	1.35/ 1.10	–	–	36000	–	1900	–	13500
G3	1.8	110	2	–	–	55,000/ 50,000	–	–	1,800/ 1,400	42,000/ 34,000	1,800/ 1,400	–	12.0/ 11.0	–	–	76000	–	1500	–	18000
G5	1.9	115	0.5	–	–	70,500/ 63,200	–	–	2,000/ 1,700	50,000/ 35,000	2,000/ 1,700	–	16.50/12.50	–	–	85000	–	1900	–	18000
G7	1.88	100	0.19	–	–	24,300/ 21,700	–	–	–	–	–	–	17.00/ 11.50		–	–	–	750	–	–
G9	1.9	115	0.5	–	–	70,500/ 63,200	–	–	2,000/ 1,700	50,000/ 35,000	2,000/ 1,700	–	16.50/ 12.50	–	–	85000	–	1900	–	18000
FR4	1.85	–	0.1	–	8.3	65,000/ 52,000	–	480/ 390	2,900/ 2,600	40,000/ 32,000	2,900/ 2,600	–	7.90/ 7.30	58/55	63/50	66000	–	2300	–	21500
G11	1.8	112	0.2	–	–	68,100/ 61,300	40000	–	3,000/ 2,700	43,000/ 37,000	3,000/ 2,700	–	12.0/ 9.0	–	–	72500	–	1900	–	22000
S/T	1.54	95	–	1.94	–	36,700/ 17,500	29,200/ 15,500	–	–	25,600/ 9,700	–	–	22.90/ 7.30	–	–	40700	–	2400	–	–
X	1.4	90	–	0.58	–	34,000/ 28,000	–	–	1,900/ 1,400	17,000/ 13,000	1,900/ 1,400	–	0.82/ 0.76	–	–	35000	–	1000	–	15000

Thermal

	Temperature Index (°C)	Tg by DMA (°C)	Coefficient of Thermal Expansion (“/”°Cx10^-6)	Flammability Rating (Class)	Flammability Vertical (Class)
Test	UL Bulletin 746b Electrical/Mechanical	Condition A	IPC-TM 650-2.4.24 X-axis/Y-axis	UL Bulletin 94 Condition A	IEC60893-2/7.2 Condition A
Units	°C	°C	“/”°Cx10^-6	Class	Class
223	125	–	–	HB	–
C	115/125	–	20.0/22.0	HB	–
CE	115/125	–	20/22	HB	–
CG	125	–	18/24	HB	–
HDA	125	–	19.5/27.6	HB	–
HDM	125	–	26.4/39.4	HB	–
L	115/125	–	18.0/19.0	HB	–
LE	125	–	18.0/19.1	HB	–
G3	140/170	–	15.0/18.0	HB	–
G5	140	–	15.0/18.0	–	V-0
G7	170/220	–	–	–	V-0
G9	140	–	15.0/18.0	–	V-0
FR4	130/140	130	10.0/13.0	–	V-0
G11	170/180	180	13/15	HB	–
S/T	165	–	27.0/39.8	–	–
X	130/130	–	13.0/17.0	HB	–

Electrical

	Breakdown Voltage (kVolts)				Electric Strength			Insulation Resistance	Arc Resistance	Comparative Tracking Index	Dissipation Factor @ 1 MHz		Relative Permittivity @ 1 MHz
Test	ASTM D149 Condition A	ASTM D149 Condition D-48/50	ASTM D149 Condition D-336/50	IEC 60893-2/6.1 Condition A	ASTM D149 Condition A	ASTM D149 Condition D-48/50	IEC 60893-2/6.1 Condition A	IEC 60893-2/6.3 Condition E-24/50:D-24/23	ASTM D495 Condition A	ASTM D3638	ASTM D150 Condition A	ASTM D150 Condition D-24/23	Condition A	Condition D-24/23	Condition D-48/50
Units	kVolts	kVolts	kVolts	kV	Volts/mil	Volts/mil	–	MΩ	sec	Volts/mil	–	–	–	–	–
223	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
C	20	5	–	–	400	150	–	–	15	155	–	–	–	–	–
CE	40	3	–	–	550	300	–	–	15	–	–	–	–	–	–
CG	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
HDA	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
HDM	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
L	45	2	–	–	575	450	–	–	15	170	–	0.07	–	5.8	–
LE	50	5	–	–	625	500	–	–	15	170	–	0.065	–	5.5	–
G3	55	40	–	–	600	580	–	–	100	150	–	–	–	–	–
G5	70	65	–	–	540	550	–	–	185	600	–	7.03	–	–	–
G7	55	32	–	–	350	–	–	–	200	–	0.018	0.045	4.55	4.67	–
G9	70	65	–	–	540	550	–	–	185	600	–	7.03	–	–	–
FR4	66	65	–	65	630	670	25	3.33×10^13	130	600	–	0.032	–	4.8	–
G11	60	55	–	–	700	720	–	–	120	150	–	0.02	–	–	4.8
S/T	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
X	40	–	–	–	600	–	–	–	90	–	–	–	–	–	–

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Tube Only

Material

Grade	Substrate	Resin	Modifier	Mil Spec	NEMA	Form	Applications
C	Canvas	Phenolic	–	MILI-24768/ 16FBM	C	Tube	Mechanical grade, gears, pinions, spacers, structural, bearings, bushings, wear parts, electrical insulation.
CG	Canvas	Phenolic	Graphite	–	–	Tube	Mechanical grade, bearings, bushings, wear parts where self lubrication and low coefficient of friction is necessary.
HDA	Canvas	Phenolic	Alumina	–	–	Tube	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.
HDM	Canvas	Phenolic	Molybdenum Disulfide	–	–	Tube	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.
LE	Linen	Epoxy	–	MIL-I-24768/ 13FBE	LE	Tube	Electrical/mechanical grade, marine relay bases, terminal bases & strips, radio parts, high humidity applications, electrical insulation
G3	Fiberglass	Phenolic	–	MIL-I-24768/18	G3	Tube	Mechanical grade, high temperature, low moisture absorbtion, gaskets, seals, structural, industrial wear parts
G5	Fiberglass	Melamine	–	MIL-I-24768/ 8GMG	G5	Tube	Electrical/Mechanical grade, switch board panels, arc barriers, circuit breaker parts, structural & electrical parts, electrical insulation
G7	Fiberglass	Silicone	–	MIL-I-24768/18	G7	Tube	Electrical grade, class H insulation, heating/appliance insulation, electrical insulation.
G9	Fiberglass	Melamine	–	MIL-I-24768/ 1GME	G9	Tube	Electrical/Mechanical Grade, marine switch board panels, structural parts, electrical insulation.
G10	Fiberglass	Epoxy	–	MIL-I-24768-2	G10	Tube	Electrical/Mechanical grade, terminal boards, high humidity applications, UL listed a 65M38 unclad, electrical insulation, foil lined material used in cryogenic insulation.
S/T	Aramid	Phenolic	Molybdenum Disulfide	–	–	Tube	Mechanical grade, high temperature, self lubricating bearings, bushings, wear parts.

Physical

	Specific Gravity	Rockwell Hardness	Moisture Absorption			Flexural Strength			Flexural Modulus	Tensile Strength	Izod Impact Strength			Charpy Impact Strength	Compressive Strength	Compressive Modulus	Bonding Strength		Shear Strength
Test	ASTM D792	ASTM D785 .250″ build up	ASTM D570 Condition A	ASTM D570 Condition D1-24/23	IEC 60893-2/8.2 Condition A	ASTM D790 Condition A, LW/CW	ASTM D790 Condition E-1/150: T-150, LW/CW	IEC 60893-2.5.1 Condition A, LW/CW	ASTM D790 Condition A, LW/CW	ASTM D638 Condition A, LW/CW	ASTM D256 Condition A, LW/CW	ASTM D256 Condition E-48/50, LW/CW	IEC 60893-2.5.4.3 Condition A, LW/CW	IEC 60893-2.5.4.2 Condition A LW/CW	ASTM D695 Condition A, Flatwise	ASTMD695 Condition A	ASTM D229 Condition A	ASTM D229 Condition D-48/50	ASTM D732 Condition A, Perpendicular
Units	–	M Scale	%	%	mg	psi	psi	–	kpsi	psi	ft-lb/in	ft-lb/in	–	kJ/m2	psi	kpsi	lb	lb	psi
C	1.30	90	2.00	–	–	–	–	–	–	7,700	–	–	–	–	25,500	350	–	–	–
CG	1.28	90	2.10	–	–	–	–	–	–	7,900	–	–	–	–	24,000	415	–	–	–
HDA	1.33	74	1.10	–	–	–	–	–	–	4,100	–	–	–	–	22,000	360	–	–	–
HDM	1.34	80	1.30	–	–	–	–	–	–	5,500	–	–	–	–	18,500	350	–	–	–
LE	1.33	110	–	1.15	–	–	–	–	–	10,000	–	–	–	–	30,000	380	–	–	–
G3	1.80	105	–	0.2	–	–	–	–	–	38,500	–	–	–	–	38,000	850	–	–	–
G5	1.88	120	–	0.8	–	–	–	–	–	27,000	–	–	–	–	26,500	1,000	–	–	–
G7	1.93	95	–	0.1	–	–	–	–	–	23,500	–	–	–	–	12,000	290	–	–	–
G9	1.95	115	–	1.0	–	–	–	–	–	26,500	–	–	–	–	33,500	1,000	–	–	–
G10	1.80	110	–	0.14	–	–	–	–	–	39,500	–	–	–	–	42,500	1,100	–	–	–
S/T	1.35	70	1.10	–	–	11,000/8,700	–	–	750/500	7,400	–	–	–	–	20,000/30,000	600/440	–	–	–

Thermal

	Temperature Index (°C)	Tg by DMA (°C)	Coefficient of Thermal Expansion (“/”°Cx10^-6)	Flammability Rating (Class)	Flammability Vertical (Class)
Test	UL Bulletin 746b Electrical/Mechanical	Condition A	IPC-TM 650-2.4.24 X-axis/Y-axis	UL Bulletin 94 Condition A	IEC60893-2/7.2 Condition A
Units	°C	°C	“/”°Cx10^-6	Class	Class
C	140/140	–	–	HB	–
CG	140	–	–	HB	–
HDA	140	–	–	HB	–
HDM	140	–	–	HB	–
LE	135	–	–	HB	–
G3	180/160	–	–	HB	–
G5	150	–	–	V-0	–
G7	170/220	–	–	V-0	–
G9	150	–	–	V-0	–
G10	200	≥170	–	HB	–
S/T	165	–	–	–	–

Electrical

	Breakdown Voltage (kVolts)				Electric Strength			Insulation Resistance	Arc Resistance	Comparative Tracking Index	Dissipation Factor @ 1 MHz		Relative Permittivity @ 1 MHz
Test	ASTM D149 Condition A	ASTM D149 Condition D-48/50	ASTM D149 Condition D-336/50	IEC 60893-2/6.1 Condition A	ASTM D149 Condition A	ASTM D149 Condition D-48/50	IEC 60893-2/6.1 Condition A	IEC 60893-2/6.3 Condition E-24/50:D-24/23	ASTM D495 Condition A	ASTM D3638	ASTM D150 Condition A	ASTM D150 Condition D-24/23	Condition A	Condition D-24/23	Condition D-48/50
Units	kVolts	kVolts	kVolts	kV	Volts/mil	Volts/mil	–	MΩ	sec	Volts/mil	–	–	–	–	–
C	–	–	–	–	135	–	–	–	–	–	–	–	–	–	–
CG	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
HDA	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
HDM	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
LE	–	–	–	–	285	220	–	–	–	–	–	–	–	–	–
G3	–	–	–	–	400	350	–	–	–	–	–	–	–	–	–
G5	–	–	–	–	315	315	–	–	–	–	–	–	–	–	–
G7	–	–	–	–	185	120	–	–	–	–	–	–	–	–	–
G9	55	30	50	–	350	340	–	–	–	–	–	–	–	–	–
G10	60	65	–	–	400	380	–	–	–	–	0.024	0.034	4.39	–	4.46
S/T	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

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Ryertex -Fiber Reinforced Composites

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