Weldability of a material

[nktqc]

Well i came across the word " Weldability " but basically i am not having more information on this so please help me on below questions -


What is the terms " weldability " stand for ?
What are factors affecting the Weldability of a material ?
What are the weldability tests ?
What is the purpose of weldability test, how its affecting the material ?
For which material / grades weldability test required ?

Thanks

 

[gtaw]

There are chapters in welding text books that cover the subject you are interested in.

Weldability in my mind is simply the ease of making a weld that is free of unacceptable discontinuities, a weld that develops the needed mechanical properties, and it will perform as intended in the expected service environment.

There are fracture tests, bend tests, surface examinations, e.g., visual examination, volumetric NDT (RT and UT), tensile tests, impact tests, explosion tests, corrosion tests, chemical analysis, macro examinations as well as micro examinations to determine the particulars of the discontinuities present or the microstructure that is present. The list goes of tests goes on and on depending on what characteristics or properties are to be determined.



Best regards - Al

 

[SJones]

To quote the AWS Guide To Weldability - Carbon & Low Alloy Steels:

"Selection of methods, materials and procedures to produce the desired results and stay out of trouble"

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

 

[nktqc]

Thanks Gtaw and Jones

Well actually i came across with this word " Weldability Test " as a requirement from one specification , and i am bit aware with the weldability as said by Mr. Jones but, Is there any specific test other than visual examination, volumetric NDT (RT and UT), tensile tests, impact tests, explosion tests, corrosion tests, chemical analysis, macro examinations as well as micro examinations ?

I agree and i come to know that material mechanical and Chemical properties will affect the weldability of a Material.

 

[Duwe6]

Bends, and to some extent Tensiles, of a weled coupon are used test for weldability of a suspect basemetal. Common on jobs requiring attachment by welding to pre-1930's steel.

 

[metengr]

You can have hydrogen cracking susceptibility testing related to welding, and stress corrosion cracking testing related to welding. These among other tests mentioned above relate to some form of weldability of materials. Weldability is such a broad term.