## Common ground
All options are clamping bars classified by their primary metallic material.
## Options at a glance
**7318.2X – Iron or steel**
- **Defining trait:** Most common and cost-effective material; offers high strength and durability.
- **Typical examples:** Workshop vise bars, machine tool clamps.
- **Best fit when:** High load-bearing needs, general industrial use, budget-conscious applications.
**7415.33 – Copper**
- **Defining trait:** Excellent electrical/thermal conductivity; non-magnetic and corrosion-resistant.
- **Typical examples:** Electrical grounding clamps, specialized lab fixtures.
- **Best fit when:** Applications involving electricity or heat transfer, where magnetism must be avoided.
**7508.90 – Nickel**
- **Defining trait:** High resistance to corrosion and heat; maintains strength at elevated temperatures.
- **Typical examples:** Aerospace components, chemical processing equipment.
- **Best fit when:** Harsh environments (high temp, corrosive), precision applications.
**7616.10 – Aluminium**
- **Defining trait:** Lightweight with good corrosion resistance; moderate strength.
- **Typical examples:** Temporary assembly clamps, portable tooling.
- **Best fit when:** Weight is critical, frequent handling, or non-magnetic needs.
**7907.00 – Zinc**
- **Defining trait:** Low melting point; used mainly for plating or casting, not structural.
- **Typical examples:** Coated clamps (rare), decorative fixtures.
- **Best fit when:** Non-load-bearing, protective coating, or aesthetic use.
**8101.99 – Tungsten**
- **Defining trait:** Extremely high density and melting point; very hard but brittle.
- **Typical examples:** Specialized tooling in extreme conditions (e.g., welding electrodes).
- **Best fit when:** Extreme heat or wear resistance needed, though rare for standard clamping.
**8102.99 – Molybdenum**
- **Defining trait:** High melting point and thermal stability; used in high-temp environments.
- **Typical examples:** Vacuum furnace fixtures, aerospace components.
- **Best fit when:** High-temperature industrial processes (e.g., metallurgy).
**8104.90 – Magnesium**
- **Defining trait:** Lightest structural metal; flammable when powdered or heated.
- **Typical examples:** Aerospace prototypes, lightweight tooling.
- **Best fit when:** Weight reduction is critical and fire risk is managed.
**8108.90 – Titanium**
- **Defining trait:** High strength-to-weight ratio; excellent corrosion resistance.
- **Typical examples:** Medical devices, aerospace clamps, marine equipment.
- **Best fit when:** Need for lightweight, strong, and corrosion-resistant performance.
## Key differences
| Material | Strength | Weight | Corrosion Resistance | Heat Resistance | Common Use Case |
|----------------|----------|----------|------------------------|------------------|----------------------------|
| Iron/Steel | High | Heavy | Moderate | Low | General industrial |
| Copper | Medium | Medium | High | Low | Electrical, non-magnetic |
| Nickel | High | Medium | Very High | High | Harsh environments |
| Aluminium | Medium | Light | High | Moderate | Portable, lightweight |
| Zinc | Low | Medium | Moderate | Low | Coatings, non-structural |
| Tungsten | Very High| Heavy | High | Extremely High | Extreme heat applications |
| Molybdenum | High | Medium | High | Extremely High | Vacuum/high-temp processes |
| Magnesium | Low | Very Light | Moderate | Low | Lightweight prototypes |
| Titanium | Very High| Light | Very High | High | Aerospace, medical |
## How to choose
- Is the clamp used in high heat or corrosive environments? → 7508.90, 8102.99, 8108.90
- Does weight matter most? → 7616.10, 8104.90
- Is electrical conductivity needed? → 7415.33
- Is it for general industrial use? → 7318.2X
- Is extreme strength or heat resistance required? → 8101.99, 8102.99
## Overlaps & pitfalls
- Some materials (e.g., titanium, nickel) suit multiple high-performance uses—choose based on the **main function**.
- Zinc and magnesium are rarely used structurally; avoid if load-bearing is needed.
- Tungsten and molybdenum are niche—only use in extreme conditions.
- If no context is given, **7318.2X (iron/steel)** is the default for most clamping bars