Re: [MW:8102] CS and SS

I agree that corrosion is one of very big culprit and reason why we must keep SS and CS separate.

From Welding point of view, one must mix CS and SS, because they  have different mechanical properties.

CS is more ductile than SS, and if you mix during welding you will not get desired welding strength.

in cladding we use CS and SS both together, but we can not say it mixing, it is bonding, and both of them are playing their on role.

Thanks & Regards,

Soni.

On Fri, Nov 5, 2010 at 8:58 PM, murugesan jeyaraman <jmurugesan@gmail.com> wrote:

 

CS and SS shall not be mixed and shall not come into contact with each other - 

 

 Reason when both SS and CS stocked together, carbon steel debris, particles, or scales will stick to the SS surfaces. Girinding particles from carbon steel will also fall on SS surfaces. These foreign particles or debris are have high carbon content and have anodic properties.   Anodic materials or particles can be corroded away easily, or you can say corrosion will start on the SS materials because of this carbon particles (it is obvious that carbon steels are prone to be corroded, if not painted). These foreign matters deposited on SS surfaces can create pitting corrosion on SS surfaces. Simply saying oxidation on SS will start because of this foreign matters or debris on carbon steels.

 

That is why most spec demands separate storage area and fabrication area for CS and SS.

 

CS and Alloy steels -  this also should not be mixed. but here corrosion is not the reason.  You cannot distinguish between CS and Alloy steel visually as both looks same. and you cannot identify which is CS and which is AS unless you have some marking or colour coding system. Both have equal affinity to corrosion. That is Colour coding of Alloy steels are must.

 

Thanks

 

Murugesan

Mcconnell Dowell SEA pte ltd

Singapore

On Fri, Nov 5, 2010 at 4:53 PM, srinivas rao <ksrvasu@gmail.com> wrote:

Hi ,


Can anyone pls let me know the reason why SS and CS should not mixed? Is it the same for CS and Alloy Steels???

Thanks and Regards

Srinivas

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