M20 Cold Forging Hexagon 2205 Bolt
usually bolt for 2205 material can be cold forged in M6-M16 size .
for M20 size , that would be hard to cold forged, usually are worked in hot forging.
however cold forging process are very competitive in price and fast production.
finnaly the engineer find a good way to succeed the M20 bolt in cold forging for 2205 material .
the size can be checked from DIN933 or DIN931 , the length can be as customer's choice.
Regarding the material , 2205 is a kind of duplex stainless steel , which include Ferrite and austinite 's property .
for more detail , pls visit page "2205".