Lincoln Electric MC-706 Specification Sheet

Metalshield
Mild Steel Metal-Cored Wire
When you're welding heavy-duty materials in demanding environments like structural steel, heavy equipment,
agricultural, or automotive component manufacturing, you need a highly productive wire. Metalshield MC-706
is built for productivity throughout the welding process. MC-706 even welds well over mill scale to reduce
prep time. A stiff sheath aids in improving the feedability of the wire, and few metal-cored products compare
in terms of bead shape and appearance. Not only does MC-706 reduce the amount of silicate islands, it also
moves the silicate islands away from the toes and into the center of the bead, making it easier to remove the
silicon and minimize cleanup time.
Advantage Lincoln
• Minimal silicate islands – reduces/eliminates cleaning.
• Silicate placement away from the toes of the weld – makes
removal easier/makes it easier to visually inspect weld.
• Excellent wash-in and bead appearance – enhances weld
bead appearance and improves overall weld quality.
• Stiffer sheath – excellent feedability.
• Excellent performance over mill scale – reduces joint
preparation time.
• Minimal spatter when welding over mill scale – can reduce
cleaning time.
• ISO14001 and 9001 certified – manufactured to standards for
environmental and quality management systems.
Typical Applications
• High speed fillet welds on lap and T-joints.
• Robotic and hard automation.
• Weldments over mill scale where spatter must be minimized.
• Weldments that are coated after welding.
• Weldments where weld quality, weld productivity, and weld
appearance are of utmost importance.
• Out-of-position welding can be done with a pulsed spray or
short-arc welding procedure.
DIAMETERS/PACKAGING
Diameter 33 Lb. (15 kg)
in. (mm) Steel Spool
.045 (1.2) ED031583
.052 (1.3) ED031584
1/16 (1.6) ED031585
MECHANICAL PROPERTIES – As Required per AWS A5.18-01
Yield Strength
psi (MPa)
Requirements
AWS E70C-6M H8 58,000 (400)
As Welded
Test Results
59,000–62,800
75% Ar/25% CO 2
(407–433)
™
MC-706
(AWS E70C-6M H8)
50 Lb. (23 kg) 50 Lb. (23 kg)
Fiber Spool Coil
ED031586 ED031589
ED031587 ED031590
ED031588 ED031591
Tensile Strength
psi (MPa)
70,000 (483)
min. min.
72,500–77,400
(500–534)
Welding Positions
1G
2F
1F
Shielding Gas
75-92% Argon / Balance CO 2
Flow Rate: 40-60 CFH
Not recommended for use with 100% CO 2 .
Conformance
AWS A5.18-01: E70C-6M H8
ASME SFA-5.18: E70C-6M
CWB/CSA: E492C-6M-H8
Diffusible Hydrogen -
As required per AWS A5.18-01
(mL /100g weld deposit), 75% argon/25% CO 2 shielding gas
Requirements (AWS E70C-6M H8):
Test Results:
500 Lb. (227 kg)
Accu-Trak™
Drum (20 in.)
ED031592
ED031593
ED031594
Charpy V-Notch
Elongation ft•lbf (Joules)
(%) @ -20ºF (-29ºC)
22 20 (27)
min. min.
27–48
25–29
(37–65)
CORED WIRE
2G
<8
3-5
Publication C3.11.2 1/06
www.lincolnelectric.com