hardness calibration brochure
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We’re Not Just Another Calibration Provider
Instron provides the highest quality hardness testing
machines as well as the highest quality service inthe industry.
Wilson Instruments is the originator of the Rockwell®
hardness tester and has over 85 years of expertise.
Wilson was acquired by Instron in 1993, and the
Instron/Wilson combination cannot be equaled in the
industry. We have local experts to meet your calibration
and service needs across the U.S., Canada and Europe,
and are fully supported by engineering and production
staff from the factory. The average Instron/Wilson
serviceman has over 15 years experience.
Not only does Instron provide on-site service and
calibration for your hardness tester, but we also are:
h A full-line manufacturer of hardness testing products
h A premier hardness standards laboratory
h A large R+D organization specializing in strength and
hardness testing and metrology
Expert at Preventive Maintenanceand Repair to Factory Standards
Unlike most other service providers, we performin-depth preventive maintenance. This results in fewer
problems between visits and longer tester life. As part
of the preventive maintenance we include
disassembly as appropriate, cleaning, polishing,
lubricating and calibration to the tightest performance
standards in the world. All replacement parts used are
Instron/Wilson original factory parts, which meet or are
improved from the original equipment specifications.
Our Service Engineers are factory-trained with an
intensive in-house program and assessment. The staff
is regularly field audited to ensure high standards are
maintained. Experienced service engineers armed with
detailed knowledge of the history of your testing
machine enable us to optimize the performance and
life of your tester.
All Field Service Engineers are kept up-to-date on
relevant changes in product design and calibration
procedures through periodic technical bulletins and
ongoing training.
Having service performed by Instron/Wilson
ensures that your tester will meet all original factory
specifications. All accredited calibrations meet
applicable ASTM and ISO standards and conform
to ISO/IEC 17025 and ANSI Z540-1 (formerly
MIL-STD-45662).
Instron® /Wilson® has unmatched capability toensure your hardness data is accurate.
®
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The Wilson Hardness Lab, based in Norwood, MA, is accredited to ISO
17025 by NVLAP® (Lab Code 200301-0). NVLAP is administered by the
National Institute of Standards and Technolog y (NIST) in Washing ton, DC.
The Instron® /Wilson® HardnessStandards Lab
Our lab has capabilities normally found only in a
national standards lab. Our many years of experience
have resulted in a wide range of capability and
low uncertainties of measurement. The Wilson
Lab produces calibration sets for our field
calibration engineers that are of higher accuracythan calibration sets commercially available from
other vendors.
Standards Traceability
In North America calibration is performed using Wilson
Calibration Laboratory service sets and calibration set
penetrators. All calibrations are performed in
accordance with ASTM specifications. Calibration
standards used are either traceable to NIST SRM’s for
the HRC scale or traceable to hardness scales
originally developed by Stanley P. Rockwell and CharlesWilson circa 1920 for all other hardness scales. With
a proven history of maintaining a stable standard,
Wilson is uniquely qualified to trace to the new NIST
standards. By combining the NIST standards and the
Wilson historical standards, Wilson can provide the
most accurate and stable hardness standards
available. All other measurement devices used in the
calibration are traceable to NIST.
In Europe calibration is performed using calibration
sets traceable to the European National MeasurementInstitutions of IMGC (Italy) and NPL (UK) as well as
NIST (USA) for the Rockwell HRC scale and conform to
ISO and ASTM specifications as required.
Hardness Scale and Range ASTM E 18 Tolerance Instron Standard Tolerance Instron Field Service Tolerance Best Measurement Uncertainty*
25 HRC 1.0 0.8 0.5 .18 HRC
45 HRC 1.0 0.8 0.5 .18 HRC
63 HRC 0.5 0.5 0.3 .16 HRC
*Reported expanded measurement uncertainty is based on a standard uncertainty multiplied by a coverag e factor of K = 2 providing a level of confidence
approximately 95%.
Maximum Non-Uniformity Allowed on Standardized Hardness Test Blocks
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Comprehensive Capability
h Indirect verification
h Direct verification
h We verify most types and brands of hardness
testing machines
h Standardized test blocks that are traceable to NIST
h Calibration sets for our customers
h Standards level calibration sets for Instron® Field
Service Engineers
Other Key Advantages:
h We keep track of re-calibration dates, so we can
call ahead of time and schedule convenient and
timely re-calibrations
h Web access to your calibration certificates
is available through our Web Support
Agreement (WSA)
h Calibration certificates are internationally
recognized and accepted through the
ILAC agreement
h All of our personnel are fully insured
Backed Up By World Class Engineering
h Expertise in hardness testing and related issues
h Expertise in metrology and calibration
h Instron engineers actively participate in the
relevant ASTM and ISO committees that write
hardness standards
You will have the full backing of Wilson’s StandardsLaboratory and years of expertise. We will assist
you to resolve any hardness issues you may have
with your customers or suppliers. With Instron/Wilson
on your side, you will have the utmost confidence in
the accuracy of your hardness testing program.
Calibration staf f are factory-trained and regulary audited in the field.
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Instron® /Wilson® hardness calibrations and verifications
in the field are accredited to ISO 17025 by NVLAP®
(Lab Code: 200301-0). NVLAP is administered by the
National Institute of Standards and Technology (NIST).
Corporate Headquarters825 University Avenue Norwood, MA 02062-2643
Tel: +1 800 473 7838 or +1 781 575 5000 Fax: +1 781 575 5725
Instron Industrial Products900 Liberty Street, Grove City, PA 16127-9969, USA
Tel: +1 724 458 9610 or +1 800 7263 8378 Fax: +1 724 478 9614
Instron is a registered trademark of Instron Corporation. Other names, logos, icons and marks identifying Instro
products and services referenced herein are trademarks of Instron Corporation and may not be used without th
prior written permission of Instron. Other product and company names listed are trademarks or trade names of the
respective companies. Copyright © 2006 Instron Corporation. All rights reserved
All of the specifications shown in this brochure are subject to change without notice
WB1241
European HeadquartersCoronation Road, High Wycombe, Bucks HP12 3SY, United Kingdom
Tel: +44 1494 456815 Fax: +44 1494 456814
www.instron.com
Hardness Scale Traceability Standard Compliance
HRA Carbide CCPA (Cemented Carbide ASTM B 294
Producers Associat ion) ISO 3738-2
HRA Steel, HRB, Original Wilson ASTM E 18
HRD,HRE, HRF, HRG, Hardness Levels
HRH, HRK, HRL, HRM,
HR15N, HR30N,
HR45N, HRP, HRR,
HRS, HR15T, HR30T,
HR45T, HRV, HR15W,
HR30W, HR45W,
HR15X, HR30X,
HR45X, HR15Y,
HR30Y and HR45Y
HRC NIST Standard ASTM E 18
Reference Materials
Rockwell - Indirect Verification
Measured Quantity Traceability Standard Compliance
Force, Depth Measuring National Standards ASTM E 18
Device, Testing Time Cycle ASTM E 4
Machine Level and National Standards Internal Instron Procedure
Frame Stiffness
Rockwell - Direct Verification of
Series 2000 Testers
Brinell/Vickers/Micro-indentation -
Indirect Verification
Measured Quantity Traceability Standard Compliance
Brinell Hardness Original Wilson ASTM E 10
Applied Forces: Hardness Levels
10 KGF to 3000 KGF
Ball Diameter:
1 mm to 10 mm
Vickers Hardness Original Wilson ASTM E 92
1 KGF to 120 KGF Hardness Levels
Knoop Micro-Indentation NIST Standard ASTM E 384
10 g to 1000 g Reference Materials
Vickers Micro-Indentation NIST Standard ASTM E 384
50 g to 1000 g Reference Materials
Measured Quantity Traceability Standard Compliance
10X – 100X National Standards ASTM E 10
30X – 1000X National Standards ASTM E 92
ASTM E 384
Brinell/Vickers/Micro-indentation -
Microscope