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ASTM-E-18, ISO 6508-2

Standard Test Method for Rockwell Hardness of Metallic Materials.

The United TRU-BLUE Rockwell Hardness Tester is computer controlled (closed loop) application of forces are via load cell measurement. The Tester has a 4 x 20 bright vacuum fluorescent display. Front panel controls with Piezo-Electric switches. Auto self-test and last test setup recall at startup. Removable parts clamp used to secure irregular shaped or oversize test specimens. Logical setup and operating menue from front panel keys. Throat depth is 5.5 inches. Optional 9.5 inch throat depth is available.
Each diamond Indenter is mounted in conformity with its grain structure to assure balanced pressure and prevent early wear or breakage, precision ground, lapped and polished. We also subject each diamond indenter to a strict performance test before it is approved and certified for sale. All diamonds and indenters are supplied with a traceable ISO/IEC 17025 accredited certificate and meet the requirements of ASTM-E18 and ASTM-E384. 
We offer a complete range of Standardized Rockwell Hardness Test Blocks and Indenters. HRC Test Blocks are directly traceable to NIST. Each Standardized Rockwell HardnessTest Block is supplied with a traceable ISO/IEC 17025 accredited Certificate. All our Rockwell Test Blocks meet the requirements of ASTM-E18 available with GRID etching.
MicroStar PHR series is an accurate and lightweight portable Hardness Tester designed for testing where limited clearance is available. This Rockwell Tester it is not only suitable for measuring small samples but also large parts and irregular parts can be adopted. The tester offsets the problem that the rebound hardness tester poses in accurate testing of small parts.