SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017

STRUERS LLC
24766 Detroit Road
Westlake, OH 44145
Jeffery Maag
Phone: 440 871 0071
CALIBRATION
Valid To: December 31, 2024

Certificate Number: 4097.01

In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to thislaboratory to perform the following calibrations1, 5:
I. Dimensional
Parameter/Equipment

Range

CMC2 ()Microscopes3

Comments
Optical verification bystage micrometer

Up to 120 µm
Up to 90 µm
Up to 210 µm(10 to 260) µm(10 to 450) µm(20 to 890) µm(40 to 1800) µm(50 to 1600) µm(100 to 4000) µm(200 to 2200) µm(150 to 7100) µm(800 to 7800) µm(A2LA Cert. No. 4097.01) 12/29/2022

0.31 µm0.44 µm
0.37 µm
0.37 µm
0.43 µm0.60 µm
0.93 µm
1.9 µm
3.4 µm
3.9 µm
2.9 µm
5.2 µm100x - objectives
80x - objectives
60x - objectives
50x - objectives
30x - 40x - objectives
20x - objectives
10x - 15x - objectives
5x - objectives
4x - objectives
3x - objectives
2.5x - objectives
0.7x - objectives

Page 1 of 9II. Mechanical
Range

Parameter/Equipment

CMC2 ()Direct verification
method per
ASTM: E384, E92;
ISO: 6507, 4545.

Direct Verification of Knoop &Vickers Hardness Testers3

Verification of the Test Force

Verification of the Device for
Measuring Indentation
Diameters

Comments(0 to 200) gf(200 to 1000) gf(1 to 150) kgf

0.16 % of range
0.12 % of range
0.12 % of range

Verification of thetest force is by loadcell per ASTM E4,ISO 7500
Optical verification bystage micrometer
100x - objectives
80x - objectives
60x - objectives
50x - objectives
30x - 40x - objectives
20x - objectives
10x - 15x - objectives
5x - objectives
4x - objectives
3x - objectives
2.5x - objectives
0.7x - objectives
LowMag - handheld
HighMag - handheld(0 to 120) µm(0 to 90) µm(0 to 210) µm(10 to 260) µm(10 to 450) µm(20 to 890) µm(40 to 1800) µm(50 to 1600) µm(100 to 4000) µm(200 to 2200) µm(150 to 7100) µm(800 to 7800) µm(400 to 7800) µm(200 to 1800) µm

0.31 µm0.44 µm
0.37 µm
0.37 µm0.43 µm
0.60 µm
0.93 µm
1.9 µm
3.4 µm
3.9 µm
2.9 µm
5.2 µm14 µm
4.8 µmIndirect Verification of Vickers
Hardness Testers3(40 to 240) HV(240 to 600) HV> 600 HV

1.8 HV
5.1 HV7.7 HV

Indirect verification
method per
ASTM E384,
ASTM E92,
ISO 6507 (Vickers)

Indirect Verification ofMicroindentation Hardness
Testers (Knoop & Vickers)3(40 to 240) HV(240 to 600) HV> 600 HV2.6 HV6.6 HV
13 HV(40 to 250) HK(250 to 650) HK> 650 HK

2.7 HK6.8 HK
10 HK

Indirect verification
method per
ASTM E384,
ASTM E92,
ISO 4545 (Knoop),
ISO 6507 (Vickers)(A2LA Cert. No. 4097.01) 12/29/2022

Page 2 of 9Range

Parameter/Equipment

CMC2 ()Comments

0.12 % of range

Verification of the test
force is by load cell
ASTM E4,
ISO 7500

Direct Verification of Brinell
Hardness Testers3
Verification of the Test
Force

Verification of the Device
for Measuring Indentation
Diameters

HBW 1(1 to 30) kgf
HBW 2.5(6.25 to 187.5) kgf
HBW 5(25 to 750) kgf
HBW 10(100 to 3000) kgf

0.12 % of range
0.12 % of range
0.12 % of range

Optical verification bystage micrometer(0 to 120) µm(0 to 90) µm(0 to 210) µm(10 to 260) µm(10 to 450) µm(20 to 890) µm(40 to 1800) µm(50 to 1600) µm(100 to 4000) µm(200 to 2200) µm(150 to 7100) µm(800 to 7800) µm(400 to 7800) µm(200 to 1800) µm

0.31 µm0.44 µm
0.37 µm
0.37 µm
0.43 µm0.60 µm
0.93 µm
1.9 µm
3.4 µm
3.9 µm
2.9 µm
5.2 µm14 µm
4.8 µm

HBW 10/3000

LowMediumHigh

1.7 HBW
5.1 HBW
8.4 HBWHBW 10/1500

Low
High

1.2 HBW
2.8 HBW

HBW 10/1000

Low
High

1.2 HBW
2.6 HBW

HBW 10/500

Low
High

0.92 HBW
1.5 HBW

100x - Objectives
80x - Objectives
60x - Objectives
50x - Objectives
30x - 40x - objectives
20x - objectives
10x - 15x - objectives
5x - objectives
4x - objectives
3x - objectives
2.5x - objectives
0.7x - objectives
LowMag - Handheld
HighMag - Handheld

Indirect Verification of Brinell
Hardness Testers3 –(A2LA Cert. No. 4097.01) 12/29/2022

Indirect verification
method perASTM E10,
ASTM E110,ISO 6506

Page 3 of 9

RangeParameter/Equipment

CMC2 ()Comments

Indirect Verification of Brinell
Hardness Testers3 (cont) –HBW 10/250

Low
MediumHigh

0.40 HBW
0.45 HBW
0.52 HBW

HBW 10/100

Low
MediumHigh

0.39 HBW
0.43 HBW
0.69 HBW

HBW 5/750

Low
MediumHigh

1.8 HBW
5.2 HBW
7.3 HBWHBW 5/250

Low
High

1.9 HBW
2.3 HBWHBW 5/125

Low
High

0.95 HBW
1.4 HBWHBW 5/62.5

Low0.63 HBWHBW 2.5/187.5

Low
MediumHigh

1.8 HBW
5.4 HBW6.8 HBW

HBW 2.5/62.5

Low
High

1.5 HBW
2.1 HBWHBW 2.5/31.25

Low
High

1.0 HBW
1.5 HBWHBW 2.5/15.625

Low

0.56 HBW

HBW 1/30

Low
MediumHigh

1.6 HBW
4.6 HBW
5.7 HBW

HBW 1/10

Low
High

1.3 HBW
2.3 HBW

HBW 1/5

Low
High

0.81 HBW
1.6 HBW

HBW 1/2.5

Low0.71 HBW(A2LA Cert. No. 4097.01) 12/29/2022

Indirect verification
method per
ASTM E10,
ASTM E110,
ISO 6506

Page 4 of 9

RangeParameter/Equipment

CMC2 ()Direct Verification ofRockwell Hardness Testers3Comments
Direct verification
method per
ASTM E18,ISO 6508

Verification of the Test
Force –Rockwell(10 to 150) kgf

0.12 % of range

Rockwell Superficial(3 to 45) kgf

0.12 % of range

RockwellUp to 260 µm

0.15 HR

Rockwell Superficial

Up to 140 µm

0.31 HR

Verification of the Machine
Hysteresis(100 & 130) HR

0.18 HR

Test blocks

HRA:
Low
MediumHigh

0.56 HRA
0.29 HRA
0.22 HRA

HRBW:
Low
MediumHigh

1.4 HRBW
1.0 HRBW
0.67 HRBW

Indirect verification
method per
ASTM E18,
ASTM E110,
ISO 6508

HRC:Low
MediumHigh

0.48 HRC
0.44 HRC
0.40 HRC

HRD:
Low
MediumHigh

0.37 HRD
0.47 HRD
0.33 HRD

Verification of the Depth
Measuring Device –Indirect Verification ofRockwell Hardness &Rockwell SuperficialHardness Testers3 –(A2LA Cert. No. 4097.01) 12/29/2022

Verification of thetest force is by loadcell ASTM E4,
ISO 7500

Kal rock depth
measuring device

Page 5 of 9

RangeParameter/Equipment
Indirect Verification ofRockwell Hardness &Rockwell Superficial Hardness
Testers3 (cont) –CMC2 ()HREW:
Low
MediumHigh

0.84 HREW
0.71 HREW
0.60 HREW

HRFW:
Low
MediumHigh

0.51 HRFW
0.59 HRFW
0.48 HRFW

HRGW:
Low
MediumHigh

1.3 HRGW
0.81 HRGW
0.60 HRGW

HRHW:
Low
High

0.47 HRHW
0.49 HRHW

HRKW:
Low
MediumHigh

0.93 HRKW
0.64 HRKW
0.60 HRKW

HRLW:
Low
High

1.1 HRLW
0.66 HRLW

HRMW:
Low
High

1.1 HRMW
0.60 HRMW

HRPW:
Low
High

0.92 HRPW
1.1 HRPW

HRRW:
Low
High

1.2 HRRW
1.2 HRRW

HRSW:
Low
High

1.1 HRSW
1.0 HRSW

HRVW:
Low
High

0.74 HRVW
0.32 HRVW(A2LA Cert. No. 4097.01) 12/29/2022

Comments

Indirect verification
method per
ASTM E18,ASTM E110,ISO 6508

Page 6 of 9Range

Parameter/Equipment
Indirect Verification ofRockwell Hardness & Rockwell
Superficial Hardness Testers3(cont) –CMC2 ()HR15N:
Low
MediumHigh

0.59 HR15N
0.37 HR15N
0.45 HR15N

HR30N:
Low
MediumHigh

0.64 HR30N
0.50 HR30N
0.45 HR30N

HR45N:
Low
MediumHigh

0.65 HR45N
0.49 HR45N
0.50 HR45N

HR15TW:
Low
MediumHigh0.73 HR15TW
0.68 HR15TW
0.59 HR15TW

HR30TW:
Low
MediumHigh

0.93 HR30TW
0.71 HR30TW
0.58 HR30TW

HR45TW:
Low
MediumHigh

1.1 HR45TW
0.94 HR45TW
0.65 HR45TW

HR15WW:
Low
High0.71 HR15WW
0.84 HR15WW

HR30WW:
Low
High

0.95 HR30WW
0.83 HR30WW

HR45WW:
Low
High

0.77 HR45WW
0.95 HR45WW

HR15XW:
Low
High

0.44 HR15XW
0.46 HR15XW

HR30XW:
Low
High

0.34 HR30XW
0.39 HR30XW(A2LA Cert. No. 4097.01) 12/29/2022

Comments

Indirect verification
method per
ASTM E18,
ASTM E110,
ISO 6508

Page 7 of 9

RangeParameter/Equipment
Indirect Verification ofRockwell Hardness & Rockwell
Superficial Hardness Testers3(cont) –CMC2 ()HR45XW:
Low
High

0.54 HR45XW
0.58 HR45XW

HR15YW:
Low
High

0.68 HR15YW
0.77 HR15YW

HR30YW:
Low
High

0.46 HR30YW
0.61 HR30YW

HR45YW:
Low
High

0.68 HR45YW
0.64 HR45YW

Comments

Indirect verification
method per
ASTM E18,
ASTM E110,ISO 6508
784 791

ASTM E74, ISO 376

Force – Load Cell Compression(0 to 2) kgf(0.005 to 0.01) kgf(0.01 to 0.05) kgf(0.05 to 2) kgf

1.1 % of rdg
0.14 % of rdg
0.064 % of rdg(0 to 20) kgf(0.005 to 0.01) kgf(0.01 to 0.1) kgf(0.1 to 0.3) kgf(0.3 to 3) kgf(3 to 6.25) kgf(6.25 to 20) kgf

3.4 % of rdg
0.67 % of rdg
0.12 % of rdg
0.066 % of rdg
0.035 % of rdg
0.019 % of rdg(0 to 50) kgf(1.5 to 2.5) kgf(2.5 to 5) kgf(5 to 20) kgf(20 to 50) kgf

0.43 % of rdg
0.23 % of rdg
0.098 % of rdg
0.072 % of rdg(0 to 150) kgf(5 to 10) kgf(10 to 50) kgf(50 to 75) kgf(75 to 150) kgf

0.46 % of rdg
0.087 % of rdg
0.071 % of rdg
0.080 % of rdg(0 to 1000) kgf(50 to 100) kgf(100 to 400) kgf(400 to 700) kgf(700 to 1000) kgf

0.12 % of rdg
0.081 % of rdg
0.077 % of rdg
0.074 % of rdg(0 to 5000) kgf(250 to 500) kgf(500 to 1250) kgf(1250 to 2000) kgf(2000 to 5000) kgf

0.25 % of rdg
0.14 % of rdg
0.088 % of rdg
0.070 % of rdg(A2LA Cert. No. 4097.01) 12/29/2022

Troemner Class 2
weights

Morehouse UCM

Page 8 of 9

RangeParameter/Equipment

CMC2, 4 ()Comments

Force3 – Measuring Equipment(5 to 80) N(100 to 700) N

9 % of rdg
0.47 % of rdg

Verification by loadcell per ASTM E4Indenter Approach Velocity(15 to 200) µm/s

0.51 µm/s

Digital stopwatch &dial indicator or gauge
blockIII. Time & Frequency
Range

Parameter/Equipment
Test Cycle – Direct
Verification of Hardness
Testers3(1 to 60) s

CMC2 ()0.21 sComments
Digital stopwatch______________________________
1

This laboratory offers commercial calibration service and field calibration service.

2Calibration and Measurement Capability Uncertainty (CMC) is the smallest uncertainty of measurementthat a laboratory can achieve within its scope of accreditation when performing more or less routine
calibrations of nearly ideal measurement standards or nearly ideal measuring equipment. CMCs represent
expanded uncertainties expressed at approximately the 95 % level of confidence, usually using a coveragefactor of k = 2. The actual measurement uncertainty of a specific calibration performed by the laboratory
may be greater than the CMC due to the behavior of the customer’s device and to influences from thecircumstances of the specific calibration.

3Field calibration service is available for this calibration. Please note the actual measurement uncertainties
achievable on a customer's site can normally be expected to be larger than the CMC found on the A2LA
Scope. Allowance must be made for aspects such as the environment at the place of calibration and forother possible adverse effects such as those caused by transportation of the calibration equipment. The
usual allowance for the actual uncertainty introduced by the item being calibrated, (e.g. resolution) mustalso be considered and this, on its own, could result in the actual measurement uncertainty achievable ona customer’s site being larger than the CMC.

4

The type of instrument or material being calibrated is defined by the parameter. This indicates thelaboratory is capable of calibrating instruments that measure or generate the values in the ranges indicatedfor the listed measurement parameter.

5This scope meets A2LA’s P112 Flexible Scope Policy.

(A2LA Cert. No. 4097.01) 12/29/2022

Page 9 of 9

Accredited Laboratory
A2LA has accredited

STRUERS LLC
Westlake, OH

for technical competence in the field ofCalibration
This laboratory is accredited in accordance with the recognized International Standard ISO/IEC 17025:2017
General requirements for the competence of testing and calibration laboratories. This laboratory also meets R205 – Specific
Requirements: Calibration Laboratory Accreditation Program. This accreditation demonstrates technical competence for adefined scope and the operation of a laboratory quality management system(refer to joint ISO-ILAC-IAF Communiqué dated April 2017).

Presented this 29th day of December 2022.

_______________________
Mr. Trace McInturff, Vice President, Accreditation Services
For the Accreditation Council
Certificate Number 4097.01
Valid to December 31, 2024For the calibrations to which this accreditation applies, please refer to the laboratory’s Calibration Scope of Accreditation.