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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 

MaterialMoh’s ValueKnoop ValueRockwell C Scale
Cadmium2.037-
Zinc2.5119-
Copper3.0163-
Nickel3.822520
Iron4.227026
Induction Hardened Steel Chrome6.877562
Chrome9.094669
Diamond10.07,000-

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.

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