Seamless eccentric reducers made of aluminum according to ASTM B361. Cold formed with subsequent heat treatment according to AD-Merkblatt HP-7/4 and tolerances according to ANSI B16.9. Weld preparation according to ANSI B16.9. Suitable for processing in shipbuilding, plant engineering and appa-rate construction, especially in the field of process engineering. Its advantages are the low weight, the very good sea-water resistance and the temperature range from -270°C to +80°C.