BS 891:1989 - Methods for hardness test (Rockwell method) and for verification of hardness testing machines (Rockwell method)
Printed version of this is available at library. To request, please e-mail to referencepk@usm.my and include a copy of this record in your e-mail.
BS 891:1989 is a British Standard that specifies methods for performing hardness tests using the Rockwell method, as well as procedures for verifying the performance of Rockwell hardness testing machines.