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View Full Version : ER70S6 vs ER70S2



CaptainWilly
03-05-2008, 09:23 PM
A pretty stupid question came up today in the shop... but alas no one knew the answer

What is the difference between er70s6 and er70s2?

olddad
03-05-2008, 09:27 PM
-2 has titanium, zirconium and aluminum in it that -3 doesn't have.

Edit; my bad...-3 doesn't have that stuff but neither does -6...sorry.

David R
03-05-2008, 09:33 PM
S-6 flows a lot more than S-2.

S-2 is supposed to be for out of position welding.

You talking MIG right?

David

Hammack_Welding
03-05-2008, 10:03 PM
I believe it is for different deoxidizers. 70s-6 has more deoxidizers than 70s-2. meaning it is better on "dirtier" metal.

Oldtimer
03-05-2008, 10:50 PM
I don't have a clue but here is what Lincoln shows:

ER70S2- compositon by %: C -0.07, Mn -0.90 t0 1.40, Si -0.40 to 0.70, Ti- 0.05 to 0.15, Zr o.o2 to o.12, Al 0.05 to 0.15

ER70S6- compositon by %: C-0.07 t0 0.15, Mn- 1.40 to 1.85, Si- o.8o to 1.15, 0% of Ti,Zr, and Al.

CaptainWilly
03-06-2008, 02:55 AM
S-6 flows a lot more than S-2.

S-2 is supposed to be for out of position welding.

You talking MIG right?

David



Mig or Tig, I have s2 and s6 in both mig and tig wire, basicly its just whatever the LWS delivers... I had a lightbulb moment today and decided to question the difference and if there is a reason for using one or the other, no one knew.

guess that answers it

So basicly for Tig since all I do is mostly flat I should go with s6, and for mig s2 would actually be better since I do alot of out of position?

David R
03-06-2008, 06:34 AM
I would say use what works for you. I have S2 mig wire and I can't get it to weld for beans. Been using s6 for too long. For Tig, S2 works better, gives a less concave bead.

Its a personal thing I guess. Our LWS only has S6 in mig and tig filler.

David

weldgault
03-06-2008, 08:03 AM
I believe it is for different deoxidizers. 70s-6 has more deoxidizers than 70s-2. meaning it is better on "dirtier" metal.

The real difference is, S-2 was formulated to weld the root in pipe, where there is no shielding on the back side and the Ti, Zr and al. will take care of that. Also because the puddle is so sluggest( because if the adddition of Al.), it is used in hardbanding drill pipe, with tungsten carbide, so the tungsten will not fall to the bottom of the puddle. John

enlpck
03-06-2008, 05:24 PM
In addition, the lower silicon and manganese, as well as the lower cap on carbon, in the -2 have some desirable properties in some applications.

Donald Branscom
03-06-2008, 09:35 PM
The "ER" in ER70S-2 means cut length TIG filler wire.

E=electrode.
R=cut length.
70=70,000 psi tensile strength.
S= solid rod no coating.
-2= type of metals in the filler wire.

Uses of S-2 or S-6 Not a stupid question at all.

weldgault
03-06-2008, 10:21 PM
The "ER" in ER70S-2 means cut length TIG filler wire.

E=electrode.
R=cut length.
70=70,000 psi tensile strength.
S= solid rod no coating.
-2= type of metals in the filler wire.

Uses of S-2 or S-6 Not a stupid question at all.

Donald, ER is the prefix for GMAW also. Electrode Rod, wire or Cut length. They take wire and streighten and cut to 18 or 36". John