I. Classification by Processing Technology
1. Hot-Dip Galvanized Steel (HDG)
Process: Steel sheet is immersed in molten zinc (450-460°C), with a zinc layer thickness typically 50-200g/㎡.

Features: Uniform zinc layer, strong adhesion, and excellent corrosion resistance (suitable for outdoor applications).

Applications: Building roofs, highway guardrails, and photovoltaic mounting systems (such as the West African pipe piles).

Exporting stainless steel requires extreme care, as its surface finish, precision, and corrosion resistance are easily damaged during transportation.
I. Packaging - Protecting the Surface is of the utmost importance
1. Selecting Appropriate Packaging Materials:

Scratch Prevention: Use clean, impurity-free lining materials, such as:

Plastic Film: VCI (Vapor Corrosion Inhibitor), PE film, and stretch film. VCI film is particularly recommended as it releases rust inhibitors in confined spaces.

Rust-Proof Paper/Oil-Proof Paper: Used for wrapping between sheets or coils or on the surface.

Foam/Bubble Pads: Used to protect edges, corners, protrusions, or delicate components.

Felt/Non-Woven Fabric: Provides cushioning and scratch protection.

Do Not Use: Ordinary newspaper (ink contamination, acid corrosion), materials containing chloride ions (such as PVC film, which may cause pitting due to long-term contact), and materials that easily chip or become damp.

I. Core Characteristics Analysis

1. Excellent Mechanical Properties

Tensile Strength: ≥550 MPa (common galvanized sheet is typically 370-450 MPa), with some high-strength products exceeding 700 MPa.

Yield Strength: ≥300 MPa, suitable for load-bearing structures (such as building trusses and automobile chassis).

Elongation: ≥18%, balancing strength and formability, suitable for cold bending, stamping, and other processes.