Enrollment Deadline: 1 March 2025

Participants will report superficial hardness using the Rockwell 30N scale. Testing is conducted in accordance with ASTM E18.

Sample Description: Two ready-to-test steel test blocks with slightly different hardness values. Each block is pre-tested for homogeneity.

Samples ship in May and November for a total of two shipments.

This test is included on CTS' Scope of Accreditation to ISO/IEC 17043.