High-tensile carbon steel grades and hot-dip galvanized coating specifications.
Carbon steel provides excellent tensile load limits for heavy structural steel erections. To prevent corrosion in outdoor construction, carbon steel fasteners must be coated with protective finishes like electro-zinc plating or hot-dip galvanization.
We manufacture fasteners in mild steel (Grade 4.6, 5.6 for general anchors) and high-tensile carbon steel (Grade 8.8, 10.9 for structural joint assemblies). Coating ranges from 5-micron zinc plating to 50-micron hot-dip galvanized layers.
| Property Class | Nominal Tensile Strength | Yield Strength Limit | Min. Elongation (%) | Typical Coating Spec |
|---|---|---|---|---|
| Class 4.6 (Mild Steel) | 400 MPa | 240 MPa | 22 % | Blue/Yellow Zinc (5-8 Microns) |
| Class 5.6 (Carbon Steel) | 500 MPa | 300 MPa | 20 % | Zinc plating or Hot-dip Galvanized |
| Class 8.8 (High Tensile) | 800 MPa | 640 MPa | 12 % | Hot-Dip Galvanized (45-55 Microns) |
| Class 10.9 (Structural) | 1040 MPa | 940 MPa | 9 % | Zinc Flake / HDG coating |