## Common ground
All options are masonry anchors made from different metallic materials.
## Options at a glance
**7318.15 – Iron or steel**
- **Defining trait:** Most common and cost-effective material, offering high strength and durability.
- **Typical examples:** Expansion bolts, sleeve anchors, threaded studs.
- **Best fit when:** General-purpose anchoring in concrete or masonry where strength and affordability are key.
**7415.33 – Copper**
- **Defining trait:** Corrosion-resistant and electrically conductive; used in specialized environments.
- **Typical examples:** Anchors for marine or electrical grounding applications.
- **Best fit when:** High corrosion resistance needed, especially in wet or chemically aggressive settings.
**7508.90 – Nickel**
- **Defining trait:** Excellent resistance to heat and corrosion; used in extreme conditions.
- **Typical examples:** Anchors for industrial or high-temperature environments.
- **Best fit when:** Exposure to harsh chemicals, elevated temperatures, or corrosive atmospheres.
**7616.10 – Aluminium**
- **Defining trait:** Lightweight and corrosion-resistant; lower strength than steel.
- **Typical examples:** Anchors for lightweight structures or where weight matters (e.g., signage).
- **Best fit when:** Weight reduction is critical, and load requirements are moderate.
**7907.00 – Zinc**
- **Defining trait:** Often used as a coating (galvanization), not typically as a primary structural material.
- **Typical examples:** Zinc-coated steel anchors (not pure zinc anchors).
- **Best fit when:** The anchor is primarily steel with a protective zinc coating.
**8101.99 – Tungsten**
- **Defining trait:** Extremely dense and strong, but brittle and expensive; rarely used in standard anchors.
- **Typical examples:** Specialized high-wear or high-density applications (rare).
- **Best fit when:** Unusual need for extreme hardness or density, not typical masonry use.
**8102.99 – Molybdenum**
- **Defining trait:** High melting point and strength at elevated temperatures; very rare in standard anchors.
- **Typical examples:** Aerospace or industrial high-temp components (not common).
- **Best fit when:** Extreme thermal environments, not typical for masonry.
**8104.90 – Magnesium**
- **Defining trait:** Very lightweight but prone to corrosion; used in niche applications.
- **Typical examples:** Temporary or low-load anchors in aerospace or marine prototypes.
- **Best fit when:** Weight is critical and environment is controlled.
**8108.90 – Titanium**
- **Defining trait:** Exceptional strength-to-weight ratio and corrosion resistance; very expensive.
- **Typical examples:** High-performance anchors in aerospace, marine, or medical devices.
- **Best fit when:** Maximum durability, light weight, and corrosion resistance are required.
## Key differences
| Material | Strength | Weight | Corrosion Resistance | Cost |
|----------------|----------|----------|------------------------|----------|
| Iron/Steel | High | Medium | Low (unless coated) | Low |
| Copper | Medium | Medium | Very High | Medium |
| Nickel | High | Medium | Very High | High |
| Aluminium | Medium | Low | High | Medium |
| Zinc | Low | Medium | Moderate | Low (as coating) |
| Tungsten | Very High| High | High | Very High|
| Molybdenum | High | Medium | High | Very High|
| Magnesium | Low | Very Low | Low | Medium |
| Titanium | High | Low | Very High | Very High|
## How to choose
- Is strength the top priority? → 7318.15 or 8101.99
- Is weight a major concern? → 7616.10 or 8108.90
- Is corrosion resistance critical? → 7415.33, 7508.90, or 8108.90
- Is the environment extreme (heat/chemicals)? → 7508.90 or 8102.99
## Overlaps & pitfalls
- Zinc (7907.00) is rarely used as a standalone anchor material—most are galvanized steel.
- Tungsten, molybdenum, and magnesium anchors are highly specialized; likely not for standard masonry use.
- Titanium and nickel are overkill unless performance demands justify cost.
- **No clear priority**—choose based on the product’s MAIN function: strength, weight, or environment