Page 76 - Module DMV20173
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4.0 BULK DEFORMATION PROCESSES
4.3.4 DISADVANTAGES OF FORGING
1. The forged parts often need to be machined before use.
2. Forging tooling for complicated geometry may be expensive and require multiple
passes on the same workpiece.
4.3.5 FORGING MATERIAL
Following is a table of materials and their 'forgability' ranking. The ranking indicates the
material suitability for the forging process.
Material Ranking Material Ranking
Cast Iron 50 Titanium & Alloys 80
Carbon Steel 80 Nickel & Alloys 50
Alloy Steel 80 Refractory Metals 50
Stainless Steel 80 Thermoplastics 0
Aluminum & Alloys 100 Thermosets 0
Copper & Alloys 100 Ceramics 0
Zinc & Alloys 50 Photopolymers 0
Magnesium & Alloys 50 Wood (dry) 0
A value of zero means that the corresponding material is never used with this process, a
ranking of 100 means that it is excellent for use with this process.
5.3.6 OTHER FORGING PROCESS
1. Coining.
2. Piercing.
3. Roll Forging.
4. Skew Forging.
5. Drop Forging.
6. Press Forging.
BPLK 108 DMV 20173
