where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

2175 views
Technical Discussions
S S Ananthan
S S Ananthan
03:17 May-04-2002
Clad Thickness Measurement

Dear Sir,

I am in the lookout for an instrument for finding the thickness of cladding.
The base material is stainless steel AISI 309. The clad will be stellite 6 or stellite 21.
The thickness range will be about 1.0 to 2.0 mm. The accuracy levels required is 0.1 mm.
The clad is made with Gas Metal Arc Welding.

Can someone pl suggest a suitable equipment for this ?

S S Ananthan


    
 
 Reply 
 
Richard Kazares
Richard Kazares
05:39 May-04-2002
Re: Clad Thickness Measurement
It is SOMETIMES possible to detect a cladding layer using ultrasound - but it is usually not an easy task. The problem is the similarity of sound velocity (impedence) between the cladding and the base material.

Having noted the above - it MAY be possible to do so for specific conditions - if you wish, you can contact me (see e-mail) and we would be pleased to arrange to test a small sample of your material.


: Dear Sir,
.
: I am in the lookout for an instrument for finding the thickness of cladding.
: The base material is stainless steel AISI 309. The clad will be stellite 6 or stellite 21.
: The thickness range will be about 1.0 to 2.0 mm. The accuracy levels required is 0.1 mm.
: The clad is made with Gas Metal Arc Welding.
.
: Can someone pl suggest a suitable equipment for this ?
.
: S S Ananthan
.



    
 
 Reply 
 
S. White
S. White
03:34 May-06-2002
Re: Clad Thickness Measurement
You need to use eddy current.
It is widely used to measure coating thickness.
There are specific units that are sold that focus on measuring coating/cladding thickness.

: Dear Sir,
.
: I am in the lookout for an instrument for finding the thickness of cladding.
: The base material is stainless steel AISI 309. The clad will be stellite 6 or stellite 21.
: The thickness range will be about 1.0 to 2.0 mm. The accuracy levels required is 0.1 mm.
: The clad is made with Gas Metal Arc Welding.
.
: Can someone pl suggest a suitable equipment for this ?
.
: S S Ananthan
.



    
 
 Reply 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
09:31 May-06-2002
Re: Clad Thickness Measurement
As noted by Mr. Kazares, the success or failure of ultrasonic measurement of cladding thickness depends on the ratio of the acoustic impedances of the two materials. With stellite over stainless steel, there's a reasonably good chance that the mismatch will be sufficient to permit detection an echo with the proper equipment.

Simple ultrasonic gages will usually NOT make the measurement because they'll grab the very large echo off the bottom of the stainless rather than the much smaller echo from the stellite/stainless boundary.

I'd try a 20 MHz contact transducer (for fast recovery time) on either a flaw detector or a gage that allows the user to adjust gain and blanking. Note that because of the geometry of the boundary, the echo will be cleaner at some points than others, so I'd also recommend hunting around for the cleanest response before recording data.

--Tom Nelligan
Panametrics, Inc.


    
 
 Reply 
 
John Hart
John Hart
02:15 Aug-20-2002
low dilution clad technique - no melting substrate surface
: If you are interested in a low heat, low distortion and low dilution process which eliminates carrying a molten pool on the substrate surface for injection of cladding alloy, please contact H&R Technology. HRT's PMDTM process fuses solid metal flat wire onto a substrate without the need to create a molten pool of metal. As a result, HRT's PMDTM process repairs or produces metal parts with an order of magnitude less heat input than competing technologies, yielding parts with minimal distortion and superior metallurgical characteristics.

Dear Sir,
.
: I am in the lookout for an instrument for finding the thickness of cladding.
: The base material is stainless steel AISI 309. The clad will be stellite 6 or stellite 21.
: The thickness range will be about 1.0 to 2.0 mm. The accuracy levels required is 0.1 mm.
: The clad is made with Gas Metal Arc Welding.
.
: Can someone pl suggest a suitable equipment for this ?
.
: S S Ananthan
.



    
 
 Reply 
 
Sean Franklin
Sean Franklin
03:01 Aug-20-2002
Re: low dilution clad technique - no melting substrate surface
The NDT Automation M100A Metal Inspector uses resistivity to quickly and accurately record metal thickness (Metal to Metal & Metal to Non-Metal), metal sorting, as well as, several other applications such as spot/laser weld control.

The resistivity of metal is determined by its grain structure composition and state of internal stress.
The most common materials used in the metalworking industry have significantly different internal characteristics, and as a result, different resistivities.

For additional information contact Sean Franklin @ Sfranklin@NDTAutomation.com


: : If you are interested in a low heat, low distortion and low dilution process which eliminates carrying a molten pool on the substrate surface for injection of cladding alloy, please contact H&R Technology. HRT's PMDTM process fuses solid metal flat wire onto a substrate without the need to create a molten pool of metal. As a result, HRT's PMDTM process repairs or produces metal parts with an order of magnitude less heat input than competing technologies, yielding parts with minimal distortion and superior metallurgical characteristics.
.
: Dear Sir,
: .
: : I am in the lookout for an instrument for finding the thickness of cladding.
: : The base material is stainless steel AISI 309. The clad will be stellite 6 or stellite 21.
: : The thickness range will be about 1.0 to 2.0 mm. The accuracy levels required is 0.1 mm.
: : The clad is made with Gas Metal Arc Welding.
: .
: : Can someone pl suggest a suitable equipment for this ?
: .
: : S S Ananthan
: .
.



    
 
 Reply 
 

Product Spotlight

iProbe - USB Phased Array Probe

Turn your PC, Laptop or Tablet into a powerful 32:64 Phased Array system with our USB powered Phas
...
ed Array iProbe and inspection software package. Perform affordable weld inspection and corrosion mapping inspections with this powerful but small system. The probe has a 100V pulser, 8K PRF, dual axis encoder input and achieves outstanding signal quality.
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

HARDNESS TESTER TKM-459CE combi

TKM-459CE combi applies 2 methods of hardness control: UCI and Leeb. It provides high-accuracy tes
...
ting of metals and alloys as well as items of different sizes and configurations, their hardened layers and galvanic coatings. Device represents results in HB, HRC, HV and others. Shock-, dust- and water-proof housing with intuitive software make this gauge easy to use in all working conditions.
>

Panther

M2M PANTHER is a phased-array equipment designed for both desktop and industrial applications, offer
...
ing unparalleled performance in a compact unit. It combines the speed required for industrial integrated Phased-Array Ultrasound (PAUT) solutions, with the most complete set of total focusing method (TFM) imaging techniques, making it the ultimate tool for R&D and procedure qualification.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window