## Common ground
All options refer to articulated link chains and their components, differing only in material composition.
## Options at a glance
**7315.1X – made of iron or steel**
- **Defining trait:** Constructed from ferrous metal with high tensile strength and durability.
- **Typical examples:** Industrial conveyor chains, heavy-duty lifting chains, anchor chains.
- **Best fit when:** High load-bearing capacity and resistance to wear are required.
**7419 – made of copper**
- **Defining trait:** Made from non-ferrous metal with excellent corrosion resistance and electrical conductivity.
- **Typical examples:** Electrical grounding links, marine fittings in saltwater environments, decorative chains.
- **Best fit when:** Corrosion resistance or electrical properties are essential.
**7616.9X – made of aluminium**
- **Defining trait:** Lightweight and corrosion-resistant due to natural oxide layer.
- **Typical examples:** Aerospace linkages, lightweight conveyors, marine applications where weight matters.
- **Best fit when:** Weight reduction is critical and moderate strength suffices.
## Key differences
| Feature | 7315.1X (iron/steel) | 7419 (copper) | 7616.9X (aluminium) |
|---------------------|----------------------|---------------------|---------------------|
| Weight | Heavy | Medium | Light |
| Corrosion resistance| Low to moderate | High | High |
| Strength | Very high | Moderate | Moderate |
| Electrical conductivity | Low | Very high | Low |
## How to choose
- Is the chain used in heavy industrial or lifting applications? → 7315.1X
- Does it need to resist saltwater corrosion or conduct electricity? → 7419
- Is weight a major concern (e.g., aerospace, portable systems)? → 7616.9X
## Overlaps & pitfalls
A chain may combine properties (e.g., aluminium with copper plating), but the primary material determines classification. If unclear, prioritize the dominant material by weight or function. No option is inherently superior—choice depends on application needs