Shielding Gas, Conformance | Lincoln Electric MC-706 instruction

CORED WIRE

Metalshield™ MC-706

Mild Steel Metal-Cored Wire (AWS E70C-6M H8)

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

Welding Positions

• 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.	1F	1G	2F	2G

•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.

Shielding Gas

75-92% Argon / Balance CO2 Flow Rate: 40-60 CFH

Not recommended for use with 100% CO2.

•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.

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% CO2 shielding gas

Requirements (AWS E70C-6M H8):	<8
Test Results:	3-5

DIAMETERS/PACKAGING

Diameter in. (mm)

.045 (1.2)

.052 (1.3) 1/16 (1.6)

33 Lb. (15 kg)

Steel Spool

ED031583

ED031584

ED031585

50 Lb. (23 kg)

Fiber Spool

ED031586

ED031587

ED031588

50 Lb. (23 kg)

Coil

ED031589

ED031590

ED031591

500 Lb. (227 kg)

Accu-Trak™

Drum (20 in.)

ED031592

ED031593

ED031594

MECHANICAL PROPERTIES – As Required per AWS A5.18-01

				Charpy V-Notch
	Yield Strength	Tensile Strength	Elongation	ft•lbf (Joules)
	psi (MPa)	psi (MPa)	(%)	@ -20ºF (-29ºC)

Requirements
AWS E70C-6M H8	58,000 (400)	70,000 (483)	22	20 (27)
As Welded	min.	min.	min.	min.

Test Results	59,000–62,800	72,500–77,400	25–29	27–48
75% Ar/25% CO2	59,000–62,800	72,500–77,400		27–48
75% Ar/25% CO2	(407–433)	(500–534)		(37–65)

Publication C3.11.2 1/06

www.lincolnelectric.com

MC-706 specifications

The Lincoln Electric MC-706 is a cutting-edge welding machine that stands out for its advanced technology and robust features, making it a valuable tool for both professional welders and serious hobbyists. This multi-process welder allows users to perform MIG, TIG, and stick welding, providing versatility in handling a variety of applications across different industries.

One of the main features of the MC-706 is its user-friendly interface. The machine is equipped with a digital display that provides real-time information on settings, including voltage, amperage, and wire feed speed. This intuitive design helps welders easily adjust parameters for optimal performance. Moreover, the machine incorporates an Auto-Set feature, allowing users to quickly configure the machine based on material thickness and type, significantly reducing setup time.

The MC-706 utilizes cutting-edge inverter technology. Inverter welding machines are lighter and more compact than their transformer-based counterparts, offering enhanced portability without compromising on power. The inverter design also ensures consistent arc stability and improved energy efficiency, making the MC-706 ideal for extended use in demanding environments.

Another notable characteristic of the Lincoln Electric MC-706 is its capability to accommodate a wide range of materials and thicknesses. Whether welding mild steel, stainless steel, or aluminum, this machine can handle materials up to 3/8 inches thick with ease. Its ability to switch between different welding processes adds to its versatility, allowing users to tackle various projects without needing multiple machines.

The MC-706 is also engineered with safety in mind. It features overheating and overcurrent protection, which helps prevent damage to both the machine and the welder. The unit’s robust construction ensures durability in challenging work settings, ensuring it can withstand the rigors of daily use.

In addition to its advanced features, the MC-706 is designed for ease of maintenance. Components are easily accessible, reducing downtime for repairs and servicing.

Overall, the Lincoln Electric MC-706 is a powerful and versatile welding machine that combines advanced technology with user-friendly features. Its ability to perform multiple welding processes, coupled with its compact design, makes it an ideal choice for professionals seeking reliable performance across a range of applications. Whether you are a seasoned welder or new to the trade, the MC-706 provides the tools necessary to achieve high-quality results in every project.