Calibration
Wilson Instruments offers an extensive range of calibration and verification services for hardness testing instruments and related equipment. The factory-based calibration lab maintains a broad range of primary and secondary standards, all traceable to national standards. The field-based calibration labs are staffed with highly trained ISO 17025-accredited calibration engineers who provide local services to verify your equipment on site. Instron®'- Wilson’s Calibration Lab includes full capabilities for the calibration of all Wilson hardness instruments. This lab provides the foundation of Wilson Rockwell® test blocks and represents the best hardness measuring capability in North America outside of NIST.
Rockwell Test Blocks and Calibration Sets
Standard Rockwell test blocks provide an easy means
of checking your tester's accuracy at any time, and periodic
use on a regular basis is recommended for all models. Comparing
a test reading of the block with the hardness number on the
test block will indicate whether or not the instrument needs
attention. Providing the standards of the industry, Rockwell
test blocks are manufactured and calibrated with extreme care.
Finished on the latest precision lapping equipment, Rockwell
test blocks have a surface height rating of less than five
micro-inches (CLA) and both test and supporting surfaces are
flat and parallel prior to being calibrated.
Rockwell testers used in the Wilson Standards Laboratory for
test block calibration conform to exacting requirements for
both minor and major loads as well as for the depth measuring
system. Load and depth measurements are traceable to
the National Institute of Standards and Technology (NIST).
Zero tolerance Brale® penetrators and master blocks checked to
historical Rockwell standards are used in constant monitoring of the
calibration
process. Test blocks are available in various hardness ranges.
When ordering, specify hardness range and scale approximately
the same as the work you will be testing.
Calibration Sets
For the most exacting requirements (including SPC
inherent variability studies), Rockwell calibration
sets consisting of two or three test blocks and matched penetrator,
all calibrated to a high degree of uniformity, are available.
Calibration sets provide a higher standard to rely on when
there is a question of the condition of a test block or penetrator
that has been used. Calibration sets are
available for all Rockwell scales.
ASTM Standards for Verifying Hardness Machines
E-10 Standard Test Method for Brinell Hardness of Metallic Material
| Reference Documents |
Description |
| E-140 |
Hardness conversion tables for metals |
E-18 Standard Test Method for Rockwell Hardness and Rockwell
Superficial Hardness of Metallic Material
| Reference Documents |
Description |
| A-370 |
Test methods and definitions
for mechanical testing of steel products |
| B-19 |
Specifications for cartridge
brass sheet, strip, plate, bar and disks (blanks) |
| B36/B36M |
Specifications for brass plate, sheet, strip and rolled bar |
| B96 |
Specification for copper-silicon
alloy plate, sheet, strip, and rolled bar for general
purposes and pressure vessels |
| B97 |
Specification for copper-silicon
alloy plate, sheet, strip, and rolled bar for general
purposes |
E-92 Standard Test Method for Vickers Hardness of
Metallic Material 1 Kgf to 120 Kgf
| Reference Documents |
Description |
| E140 |
Hardness conversion tables for
metal |
| E384 |
Standard test methods for microhardness
of materials 1gf to 1 Kgf |
E-103 Rapid Indentation Hardness Testing of Metallic Material
| Reference Documents |
Description |
| E4 |
Practices for force verification
of testing machines |
| E10 |
Test method for Brinell hardness
of metallic materials |
E-110 Indentation Hardness of Metallic Material
by Portable Hardness Testers
| Reference Documents |
Description |
| E10 |
Test methods for Brinell hardness
of metallic materials |
| E18 |
Test method for Rockwell hardness
and Rockwell superficial hardness of metallic materials |
| E92 |
Standard test method for Vickers
hardness of metallic material 1 Kgf to 120 Kgf |
| E140 |
Hardness conversion tables for
metals. (Relationship between Brinell Hardness, Vickers
hHardness, Rockwell Hardness, Rockwell Superficial Hardness,
and Knoop Hardness) |
E-384 Standard
Test Method for Microhardness of Materials 1 gf to 1 Kgf
| Reference Documents |
Description |
| E3 |
Method of preparation of metallographic
specimens |
| E122 |
Practice for choice of sample
size to estimate the average quality of a lot or process |
| E175 |
Terminology of microscopy |
| E691 |
Practice for conducting and interlaboratory
study to determine the precision of a test method |
