Rockwell test blocks superficial scales | Rockwell hardness standard test block | Rockwell hardness blocks in India, UK, Brazil, France, Germany, Japan, South Korea, Netherland, UAE, Mexico, Russia, Turkey, Australia, USA, Singapore, Italy, Poland, China, Spain, Portugal

Rockwell Test Blocks (Superficial scales)

Features

Tested as per ISO 6508-1, IS 1586 (Part 1) and/or ASTM E18

Tested at Fmi Testing Laboratory, NABL accredited (ISO/IEC 17025:2017)

Specially curated high-quality steel, aluminium and brass material

Specially designed heat treatment and cryogenic treatment to achieve maximum long term hardness stability, consistency and repeatability

Mirror surface finish by grinding, lapping and diamond polishing

LASER marking on the surface of hardness value, Serial number and company logo

Optional hexagonal LASER grid marking

Available in shapes: Φ50 mm and Φ64 mm

Recommended key usage: Periodic/daily intermediate checks as a secondary reference block.

Standard Rockwell Test Blocks
Scale	Hardness Range	Material / Size
HR15N	70–77, 78–88, 89–94	Steel / Dia 50 & 64 mm
HR30N	42–54, 55–73, 74–86	Steel / Dia 50 & 64 mm
HR45N	20–31, 32–61, 63–77	Steel / Dia 50 & 64 mm
HR15TW	73–80, 81–87	Aluminium / Dia 64 mm
HR15TW	88–93	Steel / Dia 50 & 64 mm
HR30TW	43–56, 57–69	Aluminium / Dia 64 mm
HR30TW	70–82	Steel / Dia 50 & 64 mm
HR45TW	12–33, 34–54	Aluminium / Dia 64 mm
HR45TW	55–72	Steel / Dia 50 & 64 mm