Skip to main content

[MW:1470] Re: radiography of aluminium

Hello Muhammed,
 
In response to your question below, X-ray radiography is you best choice due to quality issues. 
 
The second question is slightly difficult to answer as each tube/generator has different characteristics, as also the film and geometric variables have.  In referencing one of my resources, a higher end X-ray tube rated at 400-450 kV could theoretically penetrate thickness up to roughly 300 mm.  The lower limit for 50 kV is approximately 20 mm.
 
I usually work with castings from 30 mm to approximately 75 mm, although, I primarily use digital radiography using a CMOS detector. 
 
A generally accepted method of ensuring acceptability of a method is to demonstrate required sensitivity (i.e. hole-type or wire-type image quality indicators) per referencing code. 
 
I have a colleague that is better accquainted with thinner materials.  I will forward him your question and I will email you if I can clarify practical limits.

Thank you,

Charles Nelson


On Wed, Jan 21, 2009 at 10:50 PM, Muhammed Ibrahim <ibratech@gmail.com> wrote:

Hi friends,
 
Good morning,
 
I have a query regarding the radiography of aluminium.
 
X-ray or gamma ray is better for aluminium?
 
If x ray is better , what is the thickness range it can be done?
 
If gamma ray is better , what is the thickness range it can be done?
If anybody having the procedure, please forward

Thanks & Regards
Muhammed Ibrahim PK




--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
-~----------~----~----~----~------~----~------~--~---

Comments

Anonymous said…
Do you know about x-ray lamp?

Popular posts from this blog

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

Hi,  You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this.  Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime.  Again, these simulated no. Of cycles shall be specified in MTC.  The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case).  One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example.  In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...

Materails FAQs

Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...