## Common ground
All options are types of non-articulated link chains made from different metals.
## Options at a glance
**7315.8X – Made of iron or steel**
- **Defining trait:** Constructed from ferrous metal, typically strong and durable.
- **Typical examples:** Chain used in industrial lifting, fencing, or anchoring.
- **Best fit when:** High tensile strength and resistance to wear are required.
**7419 – Made of copper**
- **Defining trait:** Made from non-ferrous, corrosion-resistant copper; often used where conductivity or aesthetics matter.
- **Typical examples:** Decorative chains, electrical grounding links, antique fittings.
- **Best fit when:** Corrosion resistance, conductivity, or visual appeal is key.
**7616.9X – Made of aluminium**
- **Defining trait:** Lightweight and corrosion-resistant due to aluminum’s low density and oxide layer.
- **Typical examples:** Marine rigging, lightweight suspension systems, aerospace components.
- **Best fit when:** Weight reduction is critical and strength needs are moderate.
## Key differences
| Feature | 7315.8X (Iron/Steel) | 7419 (Copper) | 7616.9X (Aluminium) |
|------------------|------------------------|--------------------|------------------------|
| Material density | High | Medium | Low |
| Corrosion resistance | Low (rusts) | High | Very high |
| Strength | Very high | Moderate | Moderate to high |
| Primary use | Heavy-duty applications| Decorative, conductive | Lightweight, marine |
## How to choose
- Is the chain used in heavy lifting or industrial settings? → 7315.8X
- Does it need to resist corrosion or conduct electricity? → 7419
- Is weight a major concern (e.g., in marine or aerospace use)? → 7616.9X
## Overlaps & pitfalls
A chain may be made of copper-coated steel or aluminum alloy, which could blur classification. If the primary material is unclear, prioritize based on **dominant composition**. No option is inherently more important—choose by function and material identity