Re: [MW:19731] Re: DIFFERENCE BETWEEN ER70S-2 &ER70S-6

In the first part - ER 70S-6 & ER 70S-2:

S-6: contains very high Manganese & Silica content which will act as de-oxidizers and could

be used along with CO₂ as shielding gas. Radiographic quality of weld is not mandatory.

Recommended for GMAW (MIG & MAG) process.

S-2: contains limited amount of Mn & Si, but has additional elements like Zn – Al – Ti, which will

act as deoxidizers and could be used along with Argon ( or) with Ar (+) O₂ as shielding gas.

100 % radiographic quality of weld is obtainable. Recommended for GTAW (TIG) process.

In the second part i.e., with ER 70S-6:

The said golden spots are nothing but non-metallic slag spots, caused by the reaction of excessive Manganese (Mn)

used as a de-oxidizer in S-6 wire and reaction of Mn (+) Oxygen, which is transferred through CO₂ shielding gas.

It will not stick to weld surface and could be removed easily by hand / power brushing and it is a general post weld

practice if surface painting to be done. But, spots can be controlled through proper selection of Voltage / current

ratios, by using Ar (+) CO₂ mixture gas and good bead ripple finish.

If required you can use ER 70S-2, but it is 3 times expensive to S-6 wire. Alternatively, S-3 also could be used with

Argon gas.

Sridhar.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ram Yadav <yadav.vikram394@gmail.com>
To: materials-welding@googlegroups.com
Sent: Saturday, 28 December 2013 9:12 AM
Subject: [MW:19730] Re: DIFFERENCE BETWEEN ER70S-2 &ER70S-6

Dear Sir,

I am using ER70S-6 for GMAW. But found golden spots after welding. Are these golden spots Silicon Oxide or somthing else.

These golden spots causes problem during paint as its a not metal it is not covered in CED bath. I always found these spots more brighter after the paint baking.I want to eleminate this probem.

So can i switch to any other wire with less silicon composition or there is any better alternate available.

Please Suggest.

On Monday, November 26, 2012 1:49:14 PM UTC+5:30, vinu raveendran wrote:

Dear Members,

I would like to know difference between ER70S2 &ER70S6?

What does "2" and "6" mean in them and which welding process we use them?

Thankyou!

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VINU RAVEENDRAN

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