Hi experts

I have been searching for days now, but not found a usefull result for this issue - so please help me out:

I have two worksheets!
Sheet1
A B C D E F
1 Pos. Description ItemNo. QTY Material HeatNo.
2 1 Motor&shaft TE26191 1 N/A N/A
3 3 Impeller TE26C90 2 N/A Steel N/A
4 5 Flange TE26030 1 Steel N/A
5 6 Ring TE26070 1 Steel N/A
6 "...empty rows"

Sheet2
D E F G H I
1 Pos. Description ItemNo. QTY Material HeatNo.
2 1 Shaft N/A N/A N/A 215205
3 3 Blade N/A N/A N/A 520548
4 3 Hub N/A N/A N/A 30277.8
5 3 Weldingwire N/A N/A N/A EC215027
6 5 Flange N/A N/A N/A 1008
7 6 Ring N/A N/A N/A 221064
8 "empty rows"

Now I want to COMPARE "Pos." AND "Description" from the range on sheet2 with the range in sheet1. WHEN there is a MATCH in both columns in one row, I want to add the data from column 6 (HeatNo.). IF there is NO MATCH in one row, I want to copy the hole row from sheet2 to the first empty row within the range on sheet1.

So a macro using VB come out with this result:
Sheet1
A B C D E F
1 Pos. Description ItemNo. QTY Material HeatNo.
2 1 Motor&shaft TE26191 1 N/A N/A
3 3 Impeller TE26C90 2 N/A Steel N/A
4 5 Flange TE26030 1 Steel 1008
5 6 Ring TE26070 1 Steel 221064
6 1 Shaft N/A N/A N/A 215205
7 3 Blade N/A N/A N/A 520548
8 3 Hub N/A N/A N/A 30277.8
9 3 Weldingwire N/A N/A N/A EC215027
10 "empty rows"

I hope you clever people can help me out?

Br Susan