A new aluminium alloy containing (in wt.%): 0.2 - 0.5 Fe; 0.7 - 1.2 Si; 1.2 - 1.6 Mn; up to 0.3 Mg; up to 0.5 Cu; up to 0.2 Zn; up to 0.1 Ti is used to make the fins of heat exchangers particularly car radiators.

followed by up to 50 minutes at no more than 40 per cent of rated load.

The cold-work tool steel may further contain: 1.0% or less of Ni; 1.0% or less of Cu; 1.0% or less of V; and 0.5% or less of Nb.

less than or equal to 5 %.

Followed by up to 50 minutes at no more than 40 per cent of rated load.

not more than 4 % of aluminium hydroxide

This composition has a viscosity at 25 °C of no more than 50 centipoise, preferably no more than 30 centipoise, more preferably no more than 15 centipoise, and especially no more than 5 centipoise.

A centrifuge can optionally reduce water content of the cleaned fluid to no more than 5 ppm, more preferably no more than 1 ppm, and most preferably no more than 0.5 ppm.

The alloy may contain 15 % or less of iron and/or 10 % or less of molybdenum.

not more than 25 % of stanols

not more than 1,8 % of other elements

not more than 25 % of stanols

, but not more than 5 %

not more than 1,8 % of other elements

Paper products (up to 3 points