1.Size: R25
2.Ultimate Tensile Strength (KN): 730
3.Yield Strength(KN): 550
4.Hot-dip galvanized zinc coating thickness(μm): ≥70
5.Epoxy Layer Thickness (μm): ≥60
6.Excecutive Standard: 1.Hot-dip galvanizing: ISO1461 2. Epoxy Layer: ISO1519
The duplex coating rock bolt adopts two corrosion-prevention measurements on the bolt surface, hot-dip galvanizing and epoxy coating which can prevent corrosion very well.