1.surf treatment of 1,3 after welding : MFZn2-B
2.tensile strength: 100kgf min. (baking bonding strength included)
3.rubber must be broken before rubber separate from steel plate.
4.compression strength: 170kgf min
5.compressive spring constant: 100+- 10% kgf/cm
6.color mark detail shall be disscuss with supplier
compressive spring constant