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!

--
VINU RAVEENDRAN

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm

The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

Hi, You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this. Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime. Again, these simulated no. Of cycles shall be specified in MTC. The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case). One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example. In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...

Materails FAQs

Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

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...

Materials & Welding

Search This Blog