Yes you can without a new PQR provided other parameters are within approval range
Sent from my BlackBerry 10 smartphone.
Original Message
From: JERRY TUAN
Sent: Κυριακή, 8 Νοεμβρίου 2015 - 06:13
To: Materials & Welding
Reply To: materials-welding@googlegroups.com
Subject: [MW:23864] Revise was according to EN15614-1
If my pqr . I used butt joint double V, wire diameter 4.8 mm ,process SAW . Now I want to revise wps to used wire diameter 4.0 mm , is this ok
Thanks for help
Tuan.
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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...
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