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ManualsBrandsLincoln Electric ManualsTools & HardwareInnershield NR-212 3/64 in. Self-Shielded Flux-Cored Welding Wire

WELDING TECHNIQUES

Extended Stickout Welding (Cont’d)

Extended stickout welding is best suited to large diameter, high

deposition Innershield electrodes, such as 3/32 in. (2.4 mm) and

0.120 in. (3.0 mm) Innershield NS-3M. It is generally limited to

5/16 in. (8.0 mm) and larger at llets, multiple pass at llets

and the ll passes of at deep groove butt joints.

Extended stickout guides are used to maintain a consistent CTWD

(see “Contact Tip to Work Distance” section for more details).

OPERATING GUIDE

Welding Procedures

The suggested welding procedures listed in this publication are not

intended to serve as specic procedures for any application. These

suggested procedures represent the approximate procedure range

of each individual electrode. Arc voltage and/or wire feed speed

may need to be adjusted depending upon welding position, type of

weld, base steel surface condition or other factors. In general, use

the highest voltage possible consistent with porosity-free welds.

For more information on a particular Innershield electrode,

see the Lincoln Electric website. Search under “Consumables” –

“Flux-Cored Wires, Self-Shielded”.

Suggested Welding Procedures

Wire, Polarity,

AWS Class,

CTWD in. (mm),

Wire Weight

Wire Feed

Speed

in/min

(m/min)

Arc

Voltage

(volts)

Approx.

Current

(amps)

Deposit

Rate

lbs/hr

(kg/hr)

3/32 in. (2.4mm) NR-5

(1)

(DC+) E70T-3, E70T3S

1-1/4 (32)

1.60 lbs/1000 in.

100 (2.5)

150 (3.8)

200 (5.1)

250 (6.4)

22 - 23

23 - 24

24 - 25

25 - 26

340

435

510

575

7.8 (3.5)

12.3 (5.6)

16.9 (7.6)

21.4 (9.7)

0.120 in. (3.0 mm) NR-5

(1)

(DC+) E70T-3, E70T3S

1-1/4 (32)

2.46 lbs/1000 in.

130 (3.3)

165 (4.2)

205 (5.2)

255 (6.5)

22 - 23

23 - 24

24 - 25

25 - 26

500

600

700

800

16.7 (7.6)

20.9 (9.5)

25.6 (11.6)

31.5 (14.3)

3/32 in. (2.4 mm) NR-131

(1)

(DC-) E70T-10, E70T10S

1-1/2 (38)

1.58 lbs/1000 in.

150 (3.8)

200 (5.1)

250 (6.4)

350 (8.9)

425 (10.8)

25 - 26

25 - 27

26 - 27

26 - 28

27 - 28

390

490

570

720

810

11.6 (5.3)

15.6 (7.1)

19.6 (8.9)

27.6 (12.5)

33.6 (15.2)

0.045 in. (1.1 mm) NR-152

(1)

(DC-) E71T-14, E71T14S

5/8 (16)

0.39 lbs/1000 in.

60 ( 1.5)

90 (2.3)

120 (3.0)

150 (3.8)

14 - 15

15 - 16

16 - 17

17 - 18

135

160

180

1.1 (0.5)

1.8 (0.8)

2.5 (1.1)

3.2 (1.4)

NOTE: These are typical operating procedures only and are not intended to serve as

specific procedures for any applications.

(1) Single pass welding only. Key: CTWD = ESO + 1/4 in. (6 mm)

Summary of content (11 pages)

PAGE 1
WELDING TECHNIQUES Extended Stickout Welding (Cont’d) Extended stickout welding is best suited to large diameter, high deposition Innershield electrodes, such as 3/32 in. (2.4 mm) and 0.120 in. (3.0 mm) Innershield NS-3M. It is generally limited to 5/16 in. (8.0 mm) and larger flat fillets, multiple pass flat fillets and the fill passes of flat deep groove butt joints. Extended stickout guides are used to maintain a consistent CTWD (see “Contact Tip to Work Distance” section for more details).
PAGE 2
OPERATING GUIDE Suggested Welding Procedures Wire, Polarity, AWS Class, CTWD in. (mm), Wire Weight Wire Feed Speed in/min (m/min) Arc Voltage (volts) Approx. Current (amps) Deposit Rate lbs/hr (kg/hr) 0.062 in. (1.6 mm) NR-152(1) (DC+) E71T-14, E71T14S 5/8 (16) 0.74 lbs/1000 in. 30 (0.8) 40 (1.0) 50 (1.3) 70 (1.8) 110 (2.8) 13 - 14 13 - 14 15 - 16 16 - 17 19 - 20 90 115 140 185 265 1.2 (0.5) 1.6 (0.7) 2.0 (0.9) 2.8 (1.3) 4.4 (2.0) 0.068 in. (1.7 mm) NR-152(1) (DC-) E71T-14, E71T14S 3/4 (20) 0.
PAGE 3
OPERATING GUIDE Suggested Welding Procedures Wire, Polarity, AWS Class, CTWD in. (mm), Wire Weight Wire Feed Speed in/min (m/min) Arc Voltage (volts) Approx. Current (amps) Deposit Rate lbs/hr (kg/hr) 5/64 in. (2.0 mm) NR-207(2) (DC-) E71T-8-K6, E71T8-A2-K6-H16 1 (25) 1.04 lbs/1000 in. 70 (1.8) 80 (2.0) 90 (2.3) 110 (2.8) 130 (3.3) 17 - 18 18 - 19 18 - 19 20 - 21 20 - 21 205 225 240 275 300 3.4 (1.5) 3.9 (1.8) 4.5 (2.0) 5.5 (2.5) 6.5 (2.9) 5/64 in. (2.
PAGE 4
OPERATING GUIDE Suggested Welding Procedures Wire, Polarity, AWS Class, CTWD in. (mm), Wire Weight Wire Feed Speed in/min (m/min) Arc Voltage (volts) Approx. Current (amps) Deposit Rate lbs/hr (kg/hr) 3/32 in. (2.4 mm) NR-211-MP(4) (DC-) E71T-11, E71T11-AZ-CS3 3/4 - 1-1/4 (19 - 32) 1.66 lbs/1000 in. 50 (1.3) 75 (1.9) 100 (2.5) 130 (3.3) 16 - 17 19 - 20 20 - 21 22 - 23 245 305 365 400 4.2 (1.9) 6.4 (2.9) 8.7 (3.9) 11.3 (5.1) 0.045 in. (1.1 mm) NR-212(5) (DC-) E71TG-G, E71TG-AZ-G-H16 5/8 (16) 0.
PAGE 5
OPERATING GUIDE Suggested Welding Procedures Wire, Polarity, AWS Class, CTWD in. (mm), Wire Weight Wire Feed Speed in/min (m/min) Arc Voltage (volts) Approx. Current (amps) Deposit Rate lbs/hr (kg/hr) 0.072 in. (1.8 mm) NR-233 (DC-) E71T-8, E71T8-A2-CS3-H16 1 (25) 0.74 lbs/1000 in. 100 (2.5) 150 (3.8) 200 (5.1) 250 (6.4) 300 (7.6) 17 - 18 18 - 19 20 - 21 22 - 23 23 - 24 185 250 295 330 355 3.6 (1.6) 5.4 (2.5) 7.1 (3.2) 8.9 (4.0) 10.6 (4.8) 5/64 in. (2.
PAGE 6
OPERATING GUIDE Suggested Welding Procedures Wire, Polarity, AWS Class, CTWD in. (mm), Wire Weight Wire Feed Speed in/min (m/min) Arc Voltage (volts) Approx. Current (amps) Deposit Rate lbs/hr (kg/hr) 3/32 in. (2.4 mm) NR-311 (DC-) E70T-7, E70T7-AZ-CS3 1-3/4 (44) 1.62 lbs/1000 in. 75 (1/9) 135 (3.4) 150 (3.8) 210 (5.3) 270 (6.9) 20 - 22 23 - 26 24 - 27 26 - 28 28 - 30 200 300 325 400 450 5.4 (2.5) 10.2 (4.6) 11.4 (5.2) 16.5 (7.5) 22.0 (10.0) 7/64 in. (2.
PAGE 7
OPERATING GUIDE Suggested Welding Procedures Wire, Polarity, AWS Class, CTWD in. (mm), Wire Weight Wire Feed Speed in/min (m/min) Arc Voltage (volts) Approx. Current (amps) Deposit Rate lbs/hr (kg/hr) 1/16 in. (1.6 mm) NR-555 (DC-) E81T8-G, E81T8-A5-K8-H8 7/8 (22) 0.68 lbs/1000 in. 75 (1.9) 90 (2.3) 100 (2.5) 110 (2.8)(7) 120 (3.0) 16 - 17 17 - 18 17 - 18 18 - 19 19 - 20 145 160 175 185 200 2.2 (1.0) 2.7 (1.2) 3.1 (1.4) 3.4 (1.5) 3.6 (1.6) 5/64 in. (2.
PAGE 8
OPERATING GUIDE EFFECT OF WELDING PARAMETERS The four major welding parameters with Innershield welding are arc voltage, wire feed speed (WFS), travel speed and contact tip to work distance (CTWD). These variables were explained in detail earlier in this booklet in the “WELDING PARAMETERS” section. Each of these parameters is interdependent. If one is changed, usually the other three must also be adjusted in order to maintain a stable arc and good weld quality.
PAGE 9
OPERATING GUIDE TROUBLESHOOTING INNERSHIELD WELD PROBLEMS Innershield welds that are properly made have excellent appearance. However, follow the tips in this weld troubleshooting guide when the bead appearance is not as desired. To Eliminate Porosity (In order of importance) 1. Clean the joint of moisture, rust, oil, paint and other contaminants 2. Decrease voltage 3. Increase CTWD 4. Increase WFS 5. Decrease drag angle 6. Decrease travel speed To Eliminate a Ropey Convex Bead (In order of importance) 1.
PAGE 10
OPERATING GUIDE TROUBLESHOOTING INNERSHIELD WELD PROBLEMS To Eliminate Trapped Slag in Weld (In order of importance) 1. Increase weld joint opening 2. Keep arc ahead of the weld puddle by: a. Use drag angle of 20º to 30º (never use a push angle) b. Increase travel speed c. Decrease wire feed speed and voltage 3.
PAGE 11
OPERATING GUIDE TROUBLESHOOTING INNERSHIELD WELD PROBLEMS Trapped Slag (Cont’d) Slag can also get trapped inside the weld if allowed to run ahead of the puddle. The operator needs to keep the arc focused in the joint just ahead of the puddle. Use a drag travel angle to keep the slag behind the arc, with the arc force helping to push it back. Also use a travel speed that is fast enough to stay ahead of the puddle.