Hardness Testing Services

Metal-based products are only as good as the metal they are built with. And, if that metal isn’t hard enough to stand up to pressure, your products suffer.

TÜV Rheinland has experienced personnel who perform top-quality hardness measurement testing and sorting for conditioning. We implement this testing along with our other nondestructive evaluations – providing a one-stop shop service. This gives your products third-party certification while saving you shipping costs and time.

With hardness testing services of TÜV Rheinland, you benefit with a quick and inexpensive test that determines if metal meets required hardness readings, meaning that you:

• Are assured of the quality of your products
• Gain a lead against the competition with a neutral audit seal
• Reduce the risk of company liability with documented safety standards
• Benefit from fast audit times and our long-standing experience
• Show how high your high quality standards are
• Ensure compliance with local government and legal requirements

We provide quick and inexpensive testing to determine if:

• Metals meet required hardness readings for applications
• A metal component has been improperly heat treated
• Pieces do not conform
• If pieces do not conform, we sort them for proper conditioning – either with heat treatment or annealing.

Hardness testing is the resistance of metal to plastic deformation, usually by indentation. It also refers to stiffness, temper, or resistance to scratching, abrasion, or cutting. It is the property of a metal that gives it the ability to resist permanent deformation (bent, broken, or having its shape changed) when a load is applied. The greater the hardness of the metal, the greater its resistance to deformation.

Three types of accurate tests are used by the metals industry:

• Brinell hardness test
• Rockwell hardness test
• Vickers hardness test

The Brinell and the Vickers hardness test are performed utilizing a known applied load with an hard metal indention ball (Brinell) and a Diamant pyramid (Vickers) applying the load for a specified amount of time. The indention is then measured across the average diameter of the indention. This reading correlates to a Brinell or Vickers hardness number. Rockwell measures the amount of indention of a indention cone detected at a known applied load. These readings can determine the properties of metal samples and help determine if the metal in question meets specifications required for the type of service it is being used for.