ISO 642 Steel - Final Quenching Hardenability Test

Metal Test Laboratory

ISO 642 Steel - Final Quenching Hardenability Test

EUROLAB laboratory provides testing and compliance services within the scope of ISO 642 standard. This standard specifies a method for determining the hardenability of steel by final quenching (Jominy test) using a test piece with a diameter of 25 mm and a length of 100 mm.

ISO 642 Steel - Final Quenching Hardenability Test

By agreement and for a defined field of application, the test described in this standard may be replaced by the calculation of the jominy curve according to an accepted mathematical model. In case of disagreement, testing will be done.

The test consists of:

  • heating a cylindrical test piece to a specified temperature in the austenitic range for a specified period of time;
  • Extinguishing by spraying water from one end under certain conditions;
  • To determine the hardenability of the steel with variations in this hardness, measuring the hardness at certain points on the longitudinal flat surfaces made on the test piece.

In all shaping operations prior to machining the test piece, the deformation of the product in all directions should be as uniform as possible. In the case of a separately cast reference test piece, the original cross section before deformation should be at least three times the required 30 mm to 32 mm diameter.

The test piece support should ensure that the test piece is centered exactly over the end of the water supply pipe and held in place while spraying. The test piece must be dry when placed in place; The test piece shall be protected from splashing water while it is in place, as well as before and during the actual final extinguishing.

EUROLAB assists manufacturers with ISO 642 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.

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