suneel sharma
, Senior Manager NDT, ASNT NDT Level III CHW Forge (P) Ltd, India, Joined Mar ,
16
suneel sharma
, Senior Manager NDT, ASNT NDT Level III
CHW Forge (P) Ltd,
India,
Joined Mar
16

, Senior Manager NDT, ASNT NDT Level IIICHW Forge (P) Ltd,India,Joined Mar

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12:13 Aug-17-

https://www.ndt.net/forum/thread.php?msgID=#

Best Portable Hardness Tester 12:13 Aug-17-

Dear Experts,
i have requirment of portable hardness tester for testing of Carbon & medium alloy steel forgings. presently two types of hardness testers in market rebound testers and Ultrasonic contact Impedance (UCI) testers. so please suggest me which one suitable for our application.

Suneel

Jon Wallis
NDT Inspector, -
Netherlands,
Joined Feb
622

NDT Inspector, -Netherlands,Joined Feb

13:18 Aug-17-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 13:18 Aug-17-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

Suneel,
You mentioned 2 methods for hardness measurements but in order to make satisfactory measurements of forged material it probably wouldn't be acceptable or reliable to use the UCI method as the material structure may be too rough Then the rebound method would probably be more effective. All depends on the material you are examining.

S V Swamy
Engineering, - Material Testing Inspection & Quality Control Retired from Nuclear Fuel Complex , India, Joined Feb ,
787 3
S V Swamy
Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex ,
India,
Joined Feb
787 3

Engineering, - Material Testing Inspection & Quality ControlRetired from Nuclear Fuel Complex ,India,Joined Feb

16:22 Aug-17-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 16:22 Aug-17-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

Dear Suneel,

I believe there are indentation testers that are portable and in my experience they give the best results. Rebound testers and ultrasonic contact impedance testers are indirect techniques, unlike the indentation testers. So, unless you develop your own procedure and standards, converting the test results into HRB or HRC or VPN or BHN may prove to be very much error prone.

Regards

Swamy
Quality and NDT Consultant

anjafo
NDT Inspector Norway, Joined Aug ,
203
anjafo
NDT Inspector
Norway,
Joined Aug
203

NDT InspectorNorway,Joined Aug

18:40 Aug-17-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 18:40 Aug-17-In Reply to S V Swamy at 16:22 Aug-17- .

heard a lot of companies saying the poldi hammer comparison tester (manual) is still the most reliable.

we prefer it although it is tricky and not ideal for everything.

Andrew Cunningham
Consultant, NDT/QA QC/R&D
ASNT,PCN,
Canada,
Joined Feb
14

Consultant, NDT/QA QC/R&DASNT,PCN,Canada,Joined Feb

02:11 Aug-18-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 02:11 Aug-18-In Reply to anjafo at 18:40 Aug-17- .

the poldi is not good if you need to look at the HAZ

Kevin Paul Humphreys
NDT Inspector,
ALS,
Australia,
Joined Jun
12

NDT Inspector,ALS,Australia,Joined Jun

02:28 Aug-18-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 02:28 Aug-18-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

Suneel,
In Australia nearly all metallurgists use hardness testers like the Equotip 2 made by Proceq which uses an indenter.
See pdf
http://altec.co.kr/cyshop/data/__.pdf
They are fairly accurate,
Kevin

suneel sharma
, Senior Manager NDT, ASNT NDT Level III CHW Forge (P) Ltd, India, Joined Mar ,
16
suneel sharma
, Senior Manager NDT, ASNT NDT Level III
CHW Forge (P) Ltd,
India,
Joined Mar
16

, Senior Manager NDT, ASNT NDT Level IIICHW Forge (P) Ltd,India,Joined Mar

09:23 Aug-18-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 09:23 Aug-18-In Reply to anjafo at 18:40 Aug-17- .

Dear Sir,

we have already portable brinell hardness tester (King hardness tester) and it is use full onsite hardness testing on forgings but limitaion is, it is not take indent (Reading) in Ring joint groove of WNRTJ Flanges.
we want to mesure the hardness values at the root of ringjoint with accuracy and weight of job 3 KG to KG which is depand on pressure class and nominal pipe size of flange.

anjafo
NDT Inspector Norway, Joined Aug ,
203
anjafo
NDT Inspector
Norway,
Joined Aug
203

NDT InspectorNorway,Joined Aug

18:37 Aug-18-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 18:37 Aug-18-In Reply to suneel sharma at 09:23 Aug-18- .

why is poldi no good for HAZ?

Mazzoli Alberto
Other, VALVITALIA S.P.A
Italy,
Joined Aug
41

Other, VALVITALIA S.P.AItaly,Joined Aug

18:46 Aug-18-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 18:46 Aug-18-In Reply to anjafo at 18:37 Aug-18- .

actually in my company we use Ecotip3 for HB and GE for HV..both are good but the real problem is what u are going to check...this instrument for final machining parts are ok but on rough material are not so good.

Jon Wallis
NDT Inspector, -
Netherlands,
Joined Feb
622

NDT Inspector, -Netherlands,Joined Feb

09:01 Aug-19-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 09:01 Aug-19-In Reply to anjafo at 18:37 Aug-18- .

A Poldi is no good for testing HAZ because the indentation that the ball makes is far too large for the HAZ.
The HAZ width between the weld and the base metal is typically 2 to 3 mm wide and in fact the only way to really test this zone is in cross-section. We are always asked to measure the HAZ in the field but this measurement, even with etching, this is not practical (look at the edge that has become visible after etching and try to see where this zone is!). You will see from the results that the hardness results are similar to either those of the weld or those of the base metal. Inspection authorities here in Germany know this but quality managers who produce inspection and test plans for projects don't.

massimo carminati
Consultant, AUT specialist IMG Ultrasuoni Srl, Italy, Joined Apr ,
655 2 Stand
massimo carminati
Consultant, AUT specialist
IMG Ultrasuoni Srl,
Italy,
Joined Apr
655 2 Stand

Consultant, AUT specialistIMG Ultrasuoni Srl,Italy,Joined Apr

14:22 Aug-31-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 14:22 Aug-31-In Reply to Jon Wallis at 09:01 Aug-19- .

Rebound hardness tester are very sensitive to material stiffness; this is why the calibration block is so heavy and thick. UCI with 5kg load or 10 kg, I think is the best compromise for you application, but you need to take particula care in surface preparation.

aminul islam
aminul islam
14:30 Oct-13-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 14:30 Oct-13-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

It is vary important that if your tester is not good you can not work fully and easily. If you want to find a portable hardness tester for testing Carbon and medium, you can go here:http://leebhardnesstesters.com/categories/hardness-testers.aspx,There service is good.

Yaroslav
NDT Inspector, Ukraine, Joined Oct ,
1
Yaroslav
NDT Inspector,
Ukraine,
Joined Oct
1

NDT Inspector,Ukraine,Joined Oct

23:13 Oct-17-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 23:13 Oct-17-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

Both methods of measurement will not give accurate results.
It is not in the device.
Need samples to configure the devices out of material under test.
There are many other nuances.

SULTAN
SULTAN
12:34 Jan-21-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 12:34 Jan-21-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

I WANT TO KNOW HOW CAN CONVERSION BETWEEN HRG OF HARDNESS TO MICROHARDNESS
THANKS

Atul Bansal
Atul Bansal
16:22 Apr-06-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 16:22 Apr-06-In Reply to Kevin Paul Humphreys at 02:28 Aug-18- .

Hi,
I want to buy a portable hardness tester. Mostly the alloy will be stainless steel, and sometimes titanium and aluminium alloys. It will be a cast surface so surface finish may not be good. Accuracy and ease of use are desired. Leeb rebound testers are out of question. Moreover, the surface may be curved and thin (upto 3 mm). Kindly suggest me a good hardness tester, budget is not a problem.

Bede Kortegast
Director,
CIMETRIX Ltd,
USA,
Joined Apr
3

Director,CIMETRIX Ltd,USA,Joined Apr

19:17 Apr-06-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 19:17 Apr-06-In Reply to Atul Bansal at 16:22 Apr-06- .

Because your parts are so thin an Ultrasonic hardness tester is a good option. Yes 3mm is too thin for rebound, unless coupled.

Do don't mention the casting process? But on many they will leave the skin harder on some of those materials so unless you are looking for just the first few microns of surface hardness you will need to get under it. Ultrasonic testers use a Vickers diamond and do do need a fairly good surface finish. The lower test load, ( 10N ) the better the finish has to be. Reason is that microscopically you will be testing ridges ( the side of the diamond ) rather than the floor ( equal contact with each diamond face ).

Here is a good reference to surface finish. https://leebhardnesstesters.com/surface-roughness-recomendations.aspx

There you'll see that Perm Mold castings and Investment castings might be OK in terms of surface finish. Or you will need to use a portable grinder with a 80 grit disk and do a little surface clean up.

Of course any scale, sand, etc needs to be removed anyway.

LK
NDT Inspector, Norway, Joined May ,
102
LK
NDT Inspector,
Norway,
Joined May
102

NDT Inspector,Norway,Joined May

15:22 Oct-28-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 15:22 Oct-28-In Reply to Bede Kortegast at 19:17 Apr-06- .

Don't you need a reference block of the same material as object to be tested when using ultrasonic hardness tester? For instance Duplex, Inconel etc?

Neil Burleigh
, Krautkramer Australia Pty Ltd, Australia, Joined Dec ,
181
Neil Burleigh
,
Krautkramer Australia Pty Ltd,
Australia,
Joined Dec
181

Krautkramer Australia Pty Ltd,Australia,Joined Dec

23:53 Oct-28-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 23:53 Oct-28-In Reply to LK at 15:22 Oct-28- .

GE IT have the TIV instrument (Through Indenter Viewing) which is a true vickers hardness tester. with the diagonals of the indention measured through the indenter.
http://www.ge-mcs.com/en/hardness-testing/uci/tiv.html

Regards
Neil Burleigh

LK
NDT Inspector, Norway, Joined May ,
102
LK
NDT Inspector,
Norway,
Joined May
102

NDT Inspector,Norway,Joined May

11:51 Oct-29-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 11:51 Oct-29-In Reply to Neil Burleigh at 23:53 Oct-28- .

I am supposed to use GE MIC 10, when it is calibrated on a standard carbon steel reference blocks it is giving wrong readings on inconel 718

Jon Wallis
NDT Inspector, -
Netherlands,
Joined Feb
622

NDT Inspector, -Netherlands,Joined Feb

12:22 Oct-29-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 12:22 Oct-29-In Reply to LK at 11:51 Oct-29- .

Take a piece of the material you need to test and send it to a destructive testing facility and get them to polish the surface and measure the hardness in order to produce a reference piece.
With this reference piece you can adjust the MIC 10. If what you are measuring is not 'equivalent' to standard steel (whatever GE uses) you need to perform this excersise or purchase hardness standards which are very expensive. The lab should give you a signed statement that the hardness values are correct but you should also get your clients agreement for this.

LK
NDT Inspector, Norway, Joined May ,
102
LK
NDT Inspector,
Norway,
Joined May
102

NDT Inspector,Norway,Joined May

20:29 Oct-29-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 20:29 Oct-29-In Reply to Jon Wallis at 12:22 Oct-29- .

Thank you Jon Wallis. We got them made today. And seems like getting reliable results for Duplex, but when it comes to Inconel it doesnt work so well. The reference block is like 80mm long and Ø60mm bar. Certificate attached says it's between 275 and 295 HV10. Pretty much the same readins i'm getting with Equotip rebound tester (a little bit lower). But when using MIC 10 readings in the centre of the bar are almost twice higher than measured closer to the edge. Any ideas?

Gerald R. Reams
Engineering,
Industry,
USA,
Joined Aug
187

Engineering,Industry,USA,Joined Aug

AJR are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

22:09 Oct-29-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 22:09 Oct-29-In Reply to LK at 20:29 Oct-29- .

Carefully read the operating manual and the ASTM Specifications it references. There are issues with edge effects as well as indentations being too close one to another. Not to mention that cold working at edges can be a problem.


Regards,
Gerald
ASNT NDT Level III

Bede Kortgast
Director,
CIMETRIX Ltd,
USA,
Joined Apr
3

Director,CIMETRIX Ltd,USA,Joined Apr

02:19 Mar-15-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 02:19 Mar-15-In Reply to LK at 15:22 Oct-28- .

Sorry I had looked at this thread in a while. But the answer to your question is yes, you will need samples of known hardness for any materials that have a difference based on Youngs Modulus. Plain steels even of different grades are close enough that only one set of samples is needed to calibrate too. The next group would be alloy steels, then stainless steels etc. Each group is different enough in their Youngs Modulus that its typical to have separate samples. You could even get samples of specific grades in a group but the modulus variation ( even higher accuracy) is so small that most don't bother.

Marek Selucky
Marek Selucky
09:37 Feb-17-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 09:37 Feb-17-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

Dear mr.Suneel, for UCI method is best in world products from NewSonic company, expansive but best. For rebound method are on market lot of cheap and good chineese products, it is only for heavy parts.

islam farouk
Director, Business Development Manager, Egypt, Joined Apr ,
1
islam farouk
Director,
Business Development Manager,
Egypt,
Joined Apr
1

Director,Business Development Manager,Egypt,Joined Apr

11:22 May-02-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 11:22 May-02-In Reply to Marek Selucky at 09:37 Feb-17- .

I have request for portable hardness tester to measure on X10 & X20 pipes and welds, so which is more suitable or best the new equotip5 or TCM-U3 and what is the main difference. Equotip5 maybe expensive for customer.

David Ugarte
Director,
Demeq SRL,
Argentina,
Joined Aug
4

Director,Demeq SRL,Argentina,Joined Aug

16:43 May-02-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 16:43 May-02-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

Dear Suneel, if you need to measure hardness in carbon and medium alloy steel forgings you can use a rebound hardness tester. For rough surface finishes and to measure up to 650 HB use a type G impact device. No need to use a UCI hardness tester for this specific application. The first rebound hardness tester in the market was made by Proceq and they can certainly be considered the best. But Demeq, a company of which I am a part of, also offers a complete series of truly portable rebound hardness testers that are very precise, repetitive, and easy to use. And best of all, we offer very competitive prices, a 5 year warranty on the electronic unit, and permanent after sales support. Let me know if you would to receive more info on our QH5 Series rebound hardness testers.
Best Regards,
David

rajiv
rajiv
04:04 Feb-03-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 04:04 Feb-03-In Reply to Kevin Paul Humphreys at 02:28 Aug-18- .

Hi
can we use Equotip2 for checking hardness of TITANIUM TIA 16V-UTS BETWEEN 900 AND MPA(130 AND168KSI)

P V SASTRY
R & D, NDT tecniques metallurgy TAKEN VRS FROM THE POSITION OF SR. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D, India, Joined Jan ,
196
P V SASTRY
R & D, NDT tecniques metallurgy
TAKEN VRS FROM THE POSITION OF SR. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D,
India,
Joined Jan
196

R & D, NDT tecniques metallurgyTAKEN VRS FROM THE POSITION OF SR. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D,India,Joined Jan

21:01 Feb-03-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 21:01 Feb-03-In Reply to rajiv at 04:04 Feb-03- .

You can very well use it providedf the test piece/component has enough thickness.

Please remember that this is a rebound hardness tester. So it can be used on very thin sections like blades and pipes having less than about 16 mm wall thickness.

On thin sections the values tend to be very low than actual.

There is an optimum thickness required.

Best wishes

P V SASTRY

P V SASTRY
R & D, NDT tecniques metallurgy TAKEN VRS FROM THE POSITION OF SR. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D, India, Joined Jan ,
196
P V SASTRY
R & D, NDT tecniques metallurgy
TAKEN VRS FROM THE POSITION OF SR. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D,
India,
Joined Jan
196

R & D, NDT tecniques metallurgyTAKEN VRS FROM THE POSITION OF SR. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D,India,Joined Jan

08:12 Feb-04-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 08:12 Feb-04-In Reply to rajiv at 04:04 Feb-03- .

I am sorry that a mistake has occurred in my previous post It should have read as under

"You can very well use it providedf the test piece/component has enough thickness.

Please remember that this is a rebound hardness tester. So it can not be used on very thin sections like blades and pipes having less than about 16 mm wall thickness.

On thin sections the values tend to be very low than actual.

There is an optimum thickness required.

Best wishes"

In the second sentence it should have been read as " It can not be used.... " Instead it came out as "It can be used...."

Regret the mistake.

Thanks and Best wishes

P V SASTRY

Rajiv
Rajiv
05:41 Feb-05-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 05:41 Feb-05-In Reply to P V SASTRY at 08:12 Feb-04- .

Thanks Mr Sastry.
Your reply was a big help !
Because we were not getting correct reading on thin sheet but it was coming correct on thick block like aircraft torque tube. So this lead to confusion.
Thanks again for prompt reply

Christoph Frehner
Other,
Queretaro,
Joined Oct
3 6

Other,Queretaro,Joined Oct

09:10 Feb-06-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 09:10 Feb-06-In Reply to rajiv at 04:04 Feb-03- .

Hi,

Equotip is a very good solution to test the hardness of Titanium, but a few things needs to be considered.
First, as Mr. Sastry already mentioned, the thickness must be enough, but also the weight and the roughness of the sample must fulfill the requirements for the Equotip. If you need more information on this, I would recommend you this document here: https://www.proceq.com/uploads/tx_proceqproductcms/import_data/files/Equotip%20Application%20Booklet%20Portable%20Hardness%20Testing%20Using%20Leeb%20-%20Portable%20Rockwell%20-%20UCI.pdf

Second thing, which is special for Titanium, is the conversion to other scales (if necessary). For other materials default conversion curves are available, but not for titanium. Thus, I would recommend you to create your own conversion curve accordingly.

Manfred Tietze
Manfred Tietze
14:32 Feb-06-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 14:32 Feb-06-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

Dear Suneel Sharma,
Surface quality is the most decisive parameter for a significant test result. This holds for all testing methods in question. . Forgings need to be grinded prior to the test in order to remove decarburization layer and scale. For this in many cases heavy scrubbing machines are used which leave crude surface conditions and the surface in addition is uneven and may form an elliptic formed groove.
In many cases Leeb testers Type G (heavy impact device) are used due to &#;insensitivity&#; to the rough surface. In fact they will measure too low because of roughness and in addition the concave shaped test surface will corrupt the induction signal given by the permanent magnet diving into the coil.
From our experiences the UCI method could be right for this application:
Precautions: You need to prepare the scrubbed surface in addition with P80 paper wheel grinder. This process takes normally 5 to 10 seconds.
We recommend preferably a 10kgf probe because of its penetration power, high oscillation quality and integration over a larger surface portion. The measurements are very much selective because just the Vickers-diamond is forced into the surface without the need of a probe shoe or other means.
Testing: You should take approx. 7-10 readings at the deepest section of the grinded part and observe the results. As values out of the decarburize region tend to read low, you should identify them out of the list of readings and then take them out of consideration. Observing max, min and average helps to reach significant results.

Manfred Tietze
Manfred Tietze
14:50 Feb-06-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 14:50 Feb-06-In Reply to rajiv at 04:04 Feb-03- .

Dear Rajiv,
We have a customer using our UCI tester with 5kgf probe. If you like we can supply the reference.
Precaution for using the UCI tester for this:
you need to perform a comparison test and adjust the unit to the result given by the reference tester.
The adjustment result can be stored into memory for later use.

Cynthy Lee
Cynthy Lee
09:20 May-31-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 09:20 May-31-In Reply to massimo carminati at 14:22 Aug-31- .

Fabric Stiffness Tester is a good machine to determining the bending height, bending modulus and flexural rigidity of fabric by simple procedures and calculation. If you want to know more, plz go ahead:
http://www.testextextile.com/product/fabric-stiffness-tester-tf113/

George
NDT Inspector, USA, Joined Dec ,
6
George
NDT Inspector,
USA,
Joined Dec
6

NDT Inspector,USA,Joined Dec

13:36 May-31-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 13:36 May-31-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

I apologize in advance but this was the first thing I thought of and wanted to share some humor.

Zeeshan
test instruments Pakistan, Pakistan, Joined Jul ,
1
Zeeshan
test instruments Pakistan,
Pakistan,
Joined Jul
1

test instruments Pakistan,Pakistan,Joined Jul

10:20 Jul-30-

https://www.ndt.net/forum/thread.php?msgID=#

Re: Best Portable Hardness Tester 10:20 Jul-30-In Reply to suneel sharma at 12:13 Aug-17- (Opening).

This handheld Equipment consists of a Dial indicator with Special tip designed for measurement of hardness of relatively Harder sand moulds such as Green Sand moulds made with High Pressure moulding techniques.



You can get the product at any of your places, at your doorstep in Pakistan, for the great essence of online shopping convenience. Payment methods such as, cash on delivery, bank deposit. We are also offering to provide the satisfaction. You do not have to search and buy your required product via the typical shopping method. We are also offering the best quality Sand Mould Surface Hardness Tester at the reasonable price.

Here you can find best Sand Mould Surface Hardness Tester Price in Pakistan .




Order now: http://landtekinstruments.pk/sand-mould-surface-hardness-tester

 

Operation Precautions and Maintenance of Portable Leeb Hardness Tester

According to the measurement principle of Leeb hardness tester, the portable Leeb hardness tester can measure various metal materials conveniently and quickly, display the hardness measurement value immediately, and can switch freely between different hardness systems, with stable performance and affordable price. This time, we will introduce the operation precautions and maintenance of the portable Leeb hardness tester.

&#;. Precautions for operation of portable leeb hardness tester

1. The surface of the test piece of the Leeb digital portable metal hardness tester should meet the technical requirements of the test, be flat and smooth, with a surface roughness of 2um, clean and free of oil; The test piece should be supported by an object weighing 5 kg; the test piece weighing less than 2 kg should be tightly connected with a support weighing more than 5 kg.

2. The portable hardness tester working principle selects a suitable support washer according to the shape of the test piece and installs it at the end of the impact device. (When testing specimens with a radius of curvature less than 30 mm, a small support ring should be used).

3. Insert the impact device into the socket of the host, turn on the switch of the host, turn on the power of the Leeb portable hardness tester, and check whether the power supply voltage meets the requirements; if the characters on the screen flash, it means that the voltage is lower than the rated working voltage. Please turn off the power switch to charge the battery.

4. Use the standard test block to calibrate the instrument first, and then test after passing the calibration of the Leeb hardness tester.

5. Push the loading sleeve down to lock the impact body; position and press the support ring of the impact device on the surface to be tested, and press the release button of the impact device to stabilize the workpiece, impact device, body, etc. The Leeb portable hardness tester working principle completes the test through the axis of the impact device.

6. After the portable hardness tester working principle is tested, check the instrument again to ensure that the Leeb hardness tester is in a normal state during use.

7. After using the leeb tester, turn off the power switch and printer switch of the host, clean the instrument, and release the impact device.

8. After using the portable hardness tester working principle for - times, the support ring should be removed, the impact body should be taken out, and the conduit and impact device should be cleaned with a brush, but no lubricating oil should be added.

&#;. Maintenance of Portable Leeb Hardness Tester

1. Impact device

After using the portable hardness tester working principle for - times, clean the pipe and impact body of the impact device with a nylon brush. When cleaning the pipe, first unscrew the support ring, then take out the impact body, screw the nylon brush counterclockwise into the tube of the Leeb hardness tester, and then pull out.

Repeat this operation 5 times, then install the impact body and the support ring; after using the Leeb hardness tester, the impact body should be released; it is forbidden to use various lubricants in the impact device.

2. Normal maintenance procedures

When using a standard Leeb hardness tester for verification, when the error is greater than 2HRC, it may be that the ball head is worn out, and replacement of the ball head or impact body should be considered.

The above is an introduction to the operation precautions and maintenance of the portable Leeb hardness tester. The operator needs to use the tester according to the process specification in the manual. Otherwise, it is easy to cause the digital hardness tester machine failure of the Leeb hardness tester and personal injury.

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Ⅰ. Precautions for operation of portable leeb hardness tester