The difference between forged and cast mainly concerns how the material is shaped, which affects strength, structure, and application.
Forged (forged steel)
A forged part is manufactured by processing a metal blank with force (pressing/hammering) while the material is often heated.
Pros:
- ✅ Higher strength – the material's grain structure follows the shape of the part and becomes denser
- ✅ Better fatigue resistance – withstands repeated loading better
- ✅ Fewer internal defects and pores
- ✅ Better for safety-critical components
Cons:
- ❌ More expensive to manufacture
- ❌ Harder to create very complex shapes
Examples of forged products:
- Lifting eyes and eye nuts
- Shackles
- Chain components
- Tools
- High-strength bolts
Cast (cast metal)
A cast part is manufactured by pouring molten metal into a mold and letting it solidify.
Pros:
- ✅ Can manufacture very complex shapes
- ✅ Cheaper for large volumes
- ✅ Good for large and heavy components
Cons:
- ❌ Can have pores, inclusions, and casting defects
- ❌ Often lower toughness and fatigue resistance than forged parts
- ❌ Grain structure is less favorable
Examples of cast products:
- Engine blocks
- Pump housings
- Machine parts
- Valves
- Large brackets and housings
Comparison
| Property | Forged | Cast |
|---|---|---|
| Strength | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Toughness | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Fatigue resistance | ⭐⭐⭐⭐⭐ | ⭐⭐–⭐⭐⭐ |
| Complex shapes | ⭐⭐ | ⭐⭐⭐⭐⭐ |
| Price | Higher | Lower |
| Safety-critical lifting | Very suitable | Often unsuitable |
For example, regarding lifting attachments, forged construction is a major advantage because it must withstand lifting forces and not just static loads. A cast eye nut may look the same but normally has lower safety margins.
In short:
Forged = stronger and safer for loaded parts.
Cast = cheaper and better when the shape is complicated.