Transition from aluminum to steel hardware

[PanzerWolf]

Hi. Does anyone know the date at which all hardware (rivets, staples, etc) on german field equipment went from aluminum to steel? Maybe there is some kind of order?

[Ben Evans]

For buckles it was 1939/40 Transition period

[BodhiEtheridge]

Some things are a little different but like stated about 1939 -1940 was the main transition for most equipment. Aluminum did however still bleed over and was still used well after 1940