Application technology 12 Materials Thermal and general chemical resistance Materials (selection) Symbol general chemical resistance permissible temperatures (neutral media) constant short-term Stainless steels 1.4016, 1.4301 (V2A) 1.4401 (V4A), 1.4571(V4A) 1.4031, 1.4034, 1.4305, 1.4306, 1.4310, 1.4408 for neutral and corrosive media –20 °C to +400 °C Aluminium (aluminium compounds) AlMgSiPb (turned parts) AlSi10MgCu (die casting parts) AlSi9Cu3 (pressure casting parts) for neutral media –20 °C to +170 °C Brass CuZn39Pb3 (turned parts) CuZn40Pb2 (hot press parts) for neutral media –20 °C to +250 °C Thermoplastic Polyoxymethylene POM Resistant to oils and bases, not resistant to inorganic acids. +40 °C to +120 °C Polyvinyl chloride, hard PVC Resistant to most acids, bases, saline solutions. 0 °C to +60 °C 0 °C to +60 °C Polypropylene PP Resistant to watery solutions of acids, bases and salts as well as a large number of organic solvents. Not suitable for concentrated oxidising acids. 0 °C to +90 °C 0 °C to +100 °C Polyethylene PE Polyamide PA Resistant to oils, fats, waxes, fuels, weak alkalis, aliphatic and aromatic hydrocarbons. 0 °C to +100 °C Polytetrafluorethylene (Tefl on) PTFE Resistant to almost all chemicals. Not resistant to liquid sodium compounds. –20 °C to +200 °C –20 °C to +260 °C Polyvinylidene fluoride PVDF Not resistant to hot solvents as well as ketones, esters and strong alkaline solutions. –20 °C to +100 °C Polyphenyl sulphide PPS Resistant to diluted mineral acids, bases, aliphatic and aromatic hydrocarbons, oils and fats, water. Hydrolysis-resistant. up to +200 °C Elastomers (sealing materials) Ethylene prophylene rubber EPDM (A) Good resistance to ozone and weather. Particularly suitable for aggressive chemicals. Unfavourable for oils and fats. –30 °C to +130 °C Fluororubber FKM The chemical properties are are the most favourable of all elastomers. –10 °C to +150 °C –10 °C to +200 °C Nitrile rubber NBR (B) Good resistance to oils and petrol. Unfavourable with oxidising media. –10 °C to +90 °C –10 °C to +120 °C Styrene butadiene rubber SBR Resistant to oils and petrol to a limited extent only. Not suitable for oxidising media. –40 °C to +80 °C 227 GEKA® Main Catalogue
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