Ganter Norm Standard Parts - Catalogue Page 2164
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Material Characteristics of Plastics Materials and Elastomers continued Elastomers Symbol NBR Trade name Perbunan® Chemical description Acrylonitrile butadiene rubber Hardness (Shore A) 25 … 95 Temperature resistance • short-term • long-term – 40° … +150 °C – 30° … +120 °C Resistance to: * • Oil, greases • Solvents • Acid • Alkalines • Petrol • UV light / weather exposure General EPDM - - Hydrogenated acrylonitrile butadiene rubber 85 Ethylene propylene diene rubber 70 … 85 – 25° … +150 °C – 40° … +150 °C – 40° … +120 °C 25 11 good good very good + o o + + - + + o + + + o + + + NBR is a synthetic special rubber for rubber parts with high requirements for resistance to swelling when in contact with oils and fuels. H-NBR is obtained through full or partial hydrogenation of NBR. This significantly improves the resistance to heat, ozone and aging. EPDM is a synthetic all-purpose rubber characterized by its high steam and hot water resistance. The resulting materials are characterized by high mechanical strength and high abrasion resistance. Media resistance is comparable to NBR. Also worth mentioning are its outstanding resistance to aging, weathering and environmental influences as well as acids and alkalines. Tensile strength in N/mm2 Wear resistance / Abrasion resistance H-NBR Standard material for o-rings. 14 The material is used in sealings and tubings. * + resistant, o conditionally resistant, – non-resistant Material Characteristics | Page 2163
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