Ans: [MW:7967] purpose of doing nick-break test.

The NICK-BREAK TEST is useful for determining the internal quality of the weld metal. This test reveals various internal defects (if present), such as slag
inclusions,  gas  pockets,  lack  of  fusion,  and  oxidized  or burned metal. To accomplish the nick-break test for checking a butt weld, you must first flame-cut the test specimens from a sample weld . Make a saw cut at each edge through the center of the weld

 thanx

Hafiz Waqar Zia 
Etimaad Qatar LL.C
QA/QC Dept.
Doha  Qatar
Cell: +97466598936
Email- Waqqaar1@hotmail.com 

 

 

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Date: Sun, 31 Oct 2010 11:56:58 +0400
Subject: Re: [MW:7961] purpose of doing nick-break test.
From: vividsarwan@gmail.com
To: materials-welding@googlegroups.com

Dear Mr Baskaran,

This test is performed to reveal internal imperfections such as slag inclusion, lack of fusion, incomplete penetration, porosity, etc in a butt weld.  A butt weld specimen is fractured along an artificial notch that is intentionally machined on the centre line of the fillet weld specimen to facilitate fracture in the centre of the weld. The fractured specimen cross section is then visually examined for imperfections.

On Sat, Oct 30, 2010 at 1:53 PM, bas karan <baskaran07@yahoo.co.in> wrote:

Dear all
pls explain if any one know the purpose of doing nick-break test.

Thanks&regards
Baskaran.


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