Getting porosity by using Flux Core Gasless welding wire

Q: I bought flux core wire from you people a while back and I have been getting porosity from your flux core wire. Can you explain why?
Answer from WeldingCity: The gasless MIG welding such as E71T-11 and E71T-GS results can be affected by more factors than traditional solid wire welding like ER70S-6, such as welding parameters, surface conditions, plate thickness, machine set-up, work conditions and operations. Enclosed please find the welding parameters suggested from the manufacturer. You may use them as reference and let us know if there is any question. We will forward them to manufacture for further investigation. Also the below customer comment is for a Lincoln Inner shield product which supposedly is one of the best gasless MIG welding wire products in the world. Hopefully it will help.


Answer from Manufacture: You are quite right. You use different wires. You also need a different polarity setting on the machine to run gasless flux-cored wire, so this can’t be run on a standard gas only mig. (you need the Dual-Purpose ‘EN’ models). In practice you will find that the standard gas set-up runs much better, especially on thin stuff. It welds a lot smoother & cleaner than the flux-cored wire which tends to burn holes in thin car panels.
A dual purpose machine is handy if you suddenly run out of gas in the middle of a job but you will find that you will be using it in gas mode most of the time on car panels. The Clarke machines are also a good choice out of the hobby MIGs.


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  Details: AWS Classification: ER308L

  • Manufacturer: WeldingCity
  • Size: 1/8″
  • Length: 36″
  • Weight: 1″ pounds
  • Typical Element Content (wt%) in Product: C<=0.03; Cr=19.50-22.00; Ni=9.00-11.00; Mo<=0.75; Cu<=0.75; Si=0.30-0.65; Mn=1.00-2.50; P<0.030; S<0.030; Fe=balance
  • We do WHOLESALE! Please call 770.609.8032 for details.
er308l stainless steel rod


This product can also be used for welding types 321 and 347 stainless steels
This wire is suitable for applications at cryogenic temperatures
AWS A5.9, welding current DCEP

  Item Description

ER308/308L is used for welding types 304, 304L, 308 and 308L stainless steels. It is very similar to type 308 but has a on content held to a max of .03%.


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Parts that Might Go Well With

Electrode Dia. (In) 0.020 0.040 1/16 3/32 1/8* 5/32*
Collet 13N20 13N21 13N22 13N23 13N24
Collet Body 13N25 13N26 13N27 13N28 13N29
Gas Lens 45V41 45V42 45V43 45V44 45V45
Large Dia. Gas Lens 45V0204S 45V116S 45V64S 995795S 45V63S
Ceramic Cup Nozzle #3 #4 #5 #6 #7 #8 #10 #12 #15
Regular Cup 13N08 13N09 13N10 13N11 13N12 13N13
Gas Lens Cup 53N58 53N59 53N60 53N61 53N61S
Lg. Dia Gas Lens Cup 57N75 57N74 53N88 53N87 53N89
Long Cup 796F70 796F71 796F72 796F73
Extra Long Cup 796F74 796F75 796F76 796F77
Extra-Extra Long Cup 796F79 796F80 796F81
Back Cap 41V33 41V35 41V24 41V24L
Short Medium Long Ex. Long
Gasket & Insulator 598882 54N63-20 9-4
Reg./Gas L Lg. Gas L Insert
Power Cable & Adapter 57Y01** 57Y03** 45V03 45V04 105Z57 45V11
WP9 12.5′ WP9 25′ WP20 12.5′ WP20 25′ WP9 WP20/25
Gas/Water Hose (WP-20/25) 45V09 45V10 45V07 45V08
Gas 12.5′ Gas 25′ Water 12.5′ Water 25′
Electrode Dia. (In) 0.020 0.040 1/16 3/32 1/8* 5/32*
Collet 10N21 10N22 10N23 10N24 10N25 54N20
Collet Body 10N29 10N30 10N31 10N32 10N28 406488
Gas Lens 45V29 45V24 45V25 45V26 45V27 45V28
Large Dia. Gas Lens 45V0204 45V116 45V64 995795 45V63
Stubby Collet 10N21S 10N22S 10N23S 10N24S 10N25S
Stubby Collet Body 17CB20
Ceramic Cup Nozzle #3 #4 #5 #6 #7 #8 #10 #12 #15
Regular Cup 10N50 10N49 10N48 10N47 10N46 10N45 10N44
Gas Lens Cup 54N18 54N17 54N16 54N15 54N14 54N19
Lg. Dia Gas Lens Cup 57N75 57N74 53N88 53N87 53N89
Long Cup 10N50L 10N49L 10N48L 10N47L 10N46L
Long Gas Lens Cup 54N18L 54N17L 54N16L 54N15L 54N14L
Stubby Cup 13N08 13N09 13N10 13N11 13N12 13N13
Back Cap 57Y04 300M 57Y02
Short Medium Long
Gasket & Insulator 18CG 54N01 54N63 18CG-20 18-7
Regular Gas Lens Lg. Gas Lens Stubby Insert
Power Cable & Adapter 57Y01** 57Y03** 46V28** 46V30** 40V64 41V29 105Z57 45V62 45V11
WP17 12.5′ WP17 25′ WP26 12.5′ WP26 25′ WP18 12.5′ WP18 25′ WP17 WP26 WP18
Gas/Water Hose (WP-18) 40V75 41V30 40V74 41V32
Gas 12.5′ Gas 25′ Water 12.5′ Water 25′
* WP-9 and WP-17 usually does not use 1/8″ and up
** 1-piece style
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