Hardness Value of Industrial Hard Chrome Plating
Industrial hard chrome can be deposited in a rather broad range of hardness depending upon plating bath parameters. Average hardness is in the range of 66 to 70 Rockwell C scale.
A deposit of over 0.001-inch thick is essential before chromium will assume its true hardness characteristics when used over unhardened basis metals. Over a hardened base, however, the thickness is not necessary because of the substantial backing provided.
Comparison of Hardness Values
| Material | Moh’s Value | Knoop Value | Rockwell C Scale |
| Cadmium | 2.0 | 37 | - |
| Zinc | 2.5 | 119 | - |
| Copper | 3.0 | 163 | - |
| Nickel | 3.8 | 225 | 20 |
| Iron | 4.2 | 270 | 26 |
| Induction Hardened Steel Chrome | 6.8 | 775 | 62 |
| Chrome | 9.0 | 946 | 69 |
| Diamond | 10.0 | 7,000 | - |
Properties and Benefits of Industrial Hard Chrome Plating
- Wear & abrasion resistance
- Lubricity
- Hardness
- Durability
- Adhesion & bonding
- Low coefficient of friction in metal parts
- Prevents seizing & galling
- Restores the dimensions of undersized parts
- Extends equipment in-service life, reducing costly downtime
The data and Information presented are based on our experience to date. The material is intended as a guide for use at your discretion. ACME Holdings or its operating divisions assume no liability in connection with this material.