## Common ground
Both options refer to structural metal sections made from iron or steel, used in construction and engineering.
## Options at a glance
**7216 – Angles, shapes and sections of iron or non-alloy steel**
- **Defining trait:** Made specifically from iron or non-alloy (carbon) steel.
- **Typical examples:** L-sections, I-beams, flat bars made from mild steel.
- **Best fit when:** The material is plain carbon steel or iron, without alloying elements like chromium or nickel.
**7222.40 – Angles, shapes and sections**
- **Defining trait:** Broader category covering all types of angles and sections, regardless of material (includes alloy steels, stainless steel, etc.).
- **Typical examples:** Stainless steel L-sections, aluminum angles, alloy steel beams.
- **Best fit when:** The product is made from any metal type, including alloys or non-ferrous metals.
## Key differences
| Feature | 7216 – Iron/Non-alloy Steel | 7222.40 – General Sections |
|-----------------------|------------------------------|----------------------------|
| Material focus | Iron or carbon steel only | All materials |
| Scope | Narrower | Broader |
| Includes stainless/alloys? | No | Yes |
## How to choose
- Is the section made of iron or plain carbon steel (no added alloys)? → 7216
- Does it contain alloying elements (e.g., chromium, nickel) or use non-ferrous metals like aluminum? → 7222.40
## Overlaps & pitfalls
A product may fit both if it is a carbon steel L-section—this is covered by both codes. However, **7216 takes priority** when the material is iron or non-alloy steel, as it is more specific. If unsure, use the material specification: if it’s plain steel, choose 7216; otherwise, use 7222.40. Avoid confusion by focusing on material type first