## Common ground
All options refer to welded link chains made from different metals.
## Options at a glance
**7315.82 – Iron or steel**
- **Defining trait:** Made from iron or steel, offering high strength and durability.
- **Typical examples:** Industrial lifting chains, anchor chains, conveyor chains.
- **Best fit when:** High load-bearing capacity and resistance to wear are required.
**7419 – Copper**
- **Defining trait:** Made from copper, known for corrosion resistance and non-sparking properties.
- **Typical examples:** Marine fittings in explosive environments, decorative chains.
- **Best fit when:** Use in hazardous or corrosive environments where spark safety is critical.
**7616.9X – Aluminium**
- **Defining trait:** Made from aluminium, lightweight and resistant to rust.
- **Typical examples:** Lightweight lifting gear, aerospace applications, temporary rigging.
- **Best fit when:** Weight reduction is essential and high strength is less critical.
## Key differences
| Feature | 7315.82 (Iron/Steel) | 7419 (Copper) | 7616.9X (Aluminium) |
|------------------|------------------------|--------------------|------------------------|
| Strength | Very high | Medium | Low to medium |
| Weight | Heavy | Medium | Light |
| Corrosion resistance | Moderate (needs coating) | High | Very high |
| Spark safety | No | Yes | Yes |
## How to choose
- Is the chain used for heavy lifting or high-stress applications? → 7315.82
- Is it used in explosive or flammable environments? → 7419
- Is weight a major concern, and is strength less critical? → 7616.9X
## Overlaps & pitfalls
A chain may fit more than one option if it combines traits (e.g., aluminium with high strength). However, the primary material determines classification. If unsure, prioritize the **main functional requirement**: strength (steel), safety (copper), or lightness (aluminium). No option is inherently superior—choose based on application needs