CAST NYLON, PA 6G GRAPHITE FILLED

ENG

KESTAMID-GRF^®, GRAPHITE-FILLED

General

Technical Properties

Applications

Technical Values

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TRADEMARK

KESTAMID^® GRF

DOCUMENTS

KESTAMID Catalog

KESTAMID Technical Values

DESCRIPTION

Graphite and special lubricants are evenly dispersed in its entirety in this type of Polikim's cast polyamide. The material is dark grey colored.

Kestamid^®-GRF has a high degree of crystallinity and better hardness and compression strength properties compared to standard Kestamid^®. It has a low coeffient of friction and a high degree of abrasion resistance. It has good weatherability and UV resistance properties and can be more easily mechanically machined compared to standard Kestamid^®. It also can be used in higher temperatures compared again to the standard type.

STANDARD COLORS

PRODUCTS

	MOULDED RODS
	Outer Diameter Ø15-Ø700mm, Length 500-1000mm

	MOULDED TUBES
	Outer Diameter Ø70-Ø625mm, Inner Diameter Ø40-Ø300mm, Length 500-1000mm

	SHEETS
	Thickness 10-130mm, WXL 500X500 - 500X1000 - 600X600 - 600X1200 - 1000X1000 - 1000X2000 - 1200X1850mm - 1220x2000mm

TRADEMARK

KESTAMID^® GRF

DOCUMENTS

KESTAMID Catalog

KESTAMID Technical Values

High degree of crystallinity

Good compression strength and hardness

Low coeffient of friction

High degree of abrasion resistance

Good weatherability and UV resistance

Resistance to higher temperatures

Easy to machine

TRADEMARK

KESTAMID^® GRF

DOCUMENTS

KESTAMID Catalog

KESTAMID Technical Values

Gears, sheaves, all bearing designs
As rotating bearings in wind turbines
Please note that this material is non-applicable in cases where high electrical performance is needed.

KESTAMID^® TECHNICAL VALUES
	Test Method ISO	Unit	KESTAMID^®	KESTOIL^®	KESTLUB^®	KESTAMID HS^®	KESTAMID GRF^®
General Properties
Color			Yellow	Green	Red	Blue	Dark Grey
Density	1183	gr/cm³	1.15	1.14	1.15	1.15	1.15
Water Absorption (Saturation in water of 23°C)	62	%	7	5	5	6	5
Mechanical Properties
Tensile Strength at Break	527	Kg/cm²	850	750	800	800	750
Tensile Modulus of Elasticity	527	MPa	4000	4000	4000	4000	4100
Elongation at Break	527	%	>20	>30	>20	>20	>20
Compression Stress	604	Kg/cm²	950	950	950	950	1050
Compression Modulus	604	MPa	2700	2500	2600	2700	3000
Impact Strength (Charpy, unnotched)	179	Kj/m²	No break	No break	No break	No break	No break
Impact Strength (Izod, notched)	180	Kj/m²	5.6	6	6	5.6	5
Coefficient of Friction, Dynamic			0.39	0.15	0.08	0.39	0.15
Hardness	868	Shore D	84	83	84	84	85
Wear resistance		mg/km	0.44	0.11	0.02	0.44	0.20
K Factor		mm³/Nm	5.0x10^-6	1.2x10^-6	0.25x10^-6	5.0x10^-6	1.2x10^-6
Thermal Properties
Melting Temperature		°C	220	220	220	220	220
Maximum Allowable Service Temperature in Air - Continuous		°C	110	110	110	125	115
Maximum Allowable Service Temperature in Air - Short term		°C	170	170	170	185	175
Coefficient of Linear Thermal Expansion	11359	°C^-1	8x10^-5	8x10^-5	8x10^-5	8x10^-5	8x10^-5
Electrical Properties
Dielectric Coefficient	60250		3.7	3.7	3.7	3.7
Electric Strength	60243	kV/mm	25	25	25	25
Volume Resistivity	60093	W.cm	>10¹⁴	>10¹⁴	>10¹⁴	>10¹⁴
Surface Resistivity	60093	W	>10¹³	>10¹³	>10¹³	>10¹³