ALUMINIUM ALLOY FIN STOCK MATERIAL

1 . A rolled fin stock material from an 3xxx-series aluminium alloy comprising, in wt. %,

Mn

0.7% to 2.0%,

Si

0.4% to 1.5%,

Zn

up to 4%,

Fe

up to 0.8%,

Zr

0.02% to 0.40%,

Sc

0.01% to 0.6%,

Ni

up to 0.3%,

Cu

up to 0.5%,

Mg

up to 2%,

Cr

up to 0.3%,

Ti

up to 0.3%,

the balance aluminium and tolerable impurities.

2 . The rolled fin stock material according to claim 1 , wherein the Sc content is at least 0.05%.

3 . The rolled fin stock material according to claim 1 , wherein the Sc content is maximum 0.4%.

4 . The rolled fin stock material according to claim 1 , wherein the Zr content is at least 0.06%.

5 . The rolled fin stock material according to claim 1 , to wherein the Zr content is maximum 0.30%.

6 . The rolled fin stock material according to claim 1 , wherein the Mn content is at least 1.0%.

7 . The rolled fin stock material according to claim 1 , wherein the Mn content is at most 1.85%.

8 . The rolled fin stock material according to claim 1 , wherein the Cu content is maximum 0.30%.

9 . The rolled fin stock material according to claim 1 , wherein the Mg content is maximum 0.5%.

10 . The rolled fin stock material according to claim 1 , wherein the Zn content is at least 0.35%.

11 . The rolled fin stock material according to claim 1 , wherein a clad layer is applied on one or both sides of the rolled fin stock material.

12 . The rolled fin stock material according to claim 1 , wherein the rolled fin stock material is devoid of any metallic layer(s) applied on either side.

13 . The rolled fin stock material according to claim 1 , wherein the rolled fin stock material at final gauge has a thickness of 0.02 mm to 0.3 mm.

14 . The rolled fin stock material according to claim 1 , wherein the rolled fin stock material in the pre-braze condition is provided in an H1x or H2x temper and wherein x is from 1 to 9.

15 . The rolled fin stock material according to claim 1 , wherein the rolled fin stock material has been produced by a continuous casting operation.

16 . A method of manufacturing a rolled fin stock material according to claim 1 , comprising the steps of casting rolling feedstock, homogenising and/or pre-heating of the rolling feedstock at a temperature in a range of 300° C. to 500° C. prior to hot rolling to a gauge of 2 mm to 15 mm, cold rolling to final gauge, and optionally annealing of the cold rolled material at final gauge.

17 . A brazed assembly of components, comprising a plurality of substantially parallel fluid-carrying tubes and a plurality of fins, said plurality of fins being in thermal communication with said plurality of fluid-carrying tubes and structured to transfer heat away therefrom, and said plurality of fins comprising a rolled fin stock material according to claim 1 .

18 . The brazed assembly of components according to claim 17 , wherein the brazed assembly of components is a heat exchanger.