Din 933 Din912 Din934 904L Fasteners
904L fasteners include 904L bolt , 904L nut , 904L wahers , studs , thread rods and so on.
also there are a lot of standards , as well as different size .
904L is a kind of suprer austinite stainless steel.
which equal to N08904, and 1.4539.
for more detail , pls visit page "904L".
now it is widely used in different industry as below:
Petroleum, petrochemical equipment,
heat exchangers equipment .
Power plant flue gas desulfurization device
Seawater treatment equipment,
centrifuges, reactors, etc. ,which used in Pharmaceutical plants.