DIN 7500-1
Surface hardness: HV450
Core hardness: HV240-370

“For guidance on dimensioning, please contact the Technical Department”

Maximum material hardness HV <130
Example: S235 has HV <130

For punched holes, the hardness may increase in the hole wall and larger holes than the standard may be required. Hole diameters according to DIN 7500-2 are achieved by testing several different materials and punching lengths. Therefore, these should only be regarded as guidelines and, in the case of mass production, on-site testing should be carried out to optimize the fixing.

Hole diameter according to DIN 7500-2 table below  

St refers to St 12 and St 37.2
Al refers to Al99 5F13 and AlMnF10
Cu refers to E.Cub57F30, E.Cu58F30 and CuZnF38