Wire rod - fasteners


COGNE
GRADE		 W nr Rm (MPa) Rp (MPa) min A 5d (%) min Z (%) min
304R 1.4306 485/600 180 45 60
304K 1.4567 450/550 175 45 60
316R 1.4404 500/620 200 45 60
316K 1.4578 450/550 175 45 60


The choice of a steel for cold-heading is a compromise between plastic cold-deformation and corrosion resistance. The shape of the finished product influences the choice of the appropriate steel.