Alloys for Hi-Tensile Welding of All Steels

In maintenance and repair welding, situations often arise when it is difficult to identify the base metal and you know the repaired part will be subjected to extreme conditions. At other times, you have a general idea of what the base metal is but are not sure of what filler alloy to use to make the repair. To select the proper filler alloy in such situations, several factor must be considered, related to what the final use of the part will be:


1. High impact strength
2. Ductility
3. Corrosion resistance
4. High tensile strength
5. Non-contaminating to food
6. High heat service
7. Low temperature service
8. Tough but machinable
9. Dissimilar metals
10. Unknown metals

Here’s a typical maintenance repair problem involving MG special alloys: The broken part came from a furnace. The base metal looks like stainless steel; however, the previous weld repair was done using stainless steel, and the weld failed after a short period of use. What do you do now? This situation calls for a special welding alloy. In this situation, special consideration must be given to:

High heat service (part from a furnace)

Unknown base metal

High tensile strength (the last weld failed)

Tough but machinable
(after welding, the part must be machined)

The above information would lead to selecting MG 690 because this product can be used on steel, stainless steel, Monel and Inconel. (The metals the part could be possibly made from.) It has a high tensile strength (up to 85,000 psi), and it will with stand high heat service.

MG 690 would be the alloy to use because even if the part wasn’t stainless steel it is compatible to a wide range of alloys typically used for furnace or high heat applications. It is stronger than most of the base metals the part may be made of. It is tough, yet machinable. MG 690 is a special alloy that can be used on hundreds of special maintenance applications.

Another example of a typical maintenance shop situation follows:
A part of a machine must be modified to conform to a new manufacturing procedure. A high-strength alloy part was fabricated and must now be welded to an existing machine part made of an unidentified base metal. The existing machine part is probably made of a very strong material because of the work it must do. It could be one of many alloys.

Some consideration of the weld deposit to help select a filler alloy are:

• Must allow for F.D.A. System approval.

• Must be compatible to a wide range of base metals because the base metal is unidentified.

• Must have a high tensile strength because of the work being done.

• Must be ductile for the same reasoning.

The above considerations would lead to selecting MG 600 because it has high tensile strength and good ductility. (Usually high tensile alloys have low ductility. The magic of MG 600 is its very high tensile strength along with good ductility.)

Universal Problem-Solver  for Special Alloy Welding
One of the most versatile alloys for solving most problem situations is MG 600. It can be used for the joining of all steels - low, medium and high carbon steels, stainless steel, manganese steel, and tool steels-or any combination. It is a build-up alloy as well as a padding alloy used prior to wearfacing. It is exceptional because of its compatibility to all steel and most iron alloys. It gives the welder capability to use any surfacing electrode on almost any iron base alloy without fear of the deposits spalling (breaking off). This is the ultimate cladding alloy prior to hardfacing. MG 600 has also developed a reputation as the “Stud Removal Rod.” It not only removes broken high tensile studs, but also removes taps or drills that break below the surface of the hole.

 
 
MG Super 600

• The finest electrode for welding most dissimilar steels.
• Exceptional strength, ease of use, and ability to operate on machines with low open-circuit voltage make this the first choice for home hobbyists and maintenance welders.
• Welds all types of steels without danger of cracking or breakage.
• Higher Cr/Ni content than MG 600 Contains molybdenum for better mechanical properties.

 

MSDS

Data Sheet

 

 
 
MG 600

• Strong universal electrode for all steels.
• High Cr/Ni content for joint welding of dissimilar steels.
• Buffer layer for crack sensitive hardfacing alloys.
• Excellent weldability and slag release on DC and AC low open-circuit voltage machines.
• Ideal for welding low, medium, and high alloy steels as well as dissimilar steels.
• For uses such as:tools & dies, springs, broken stud removal, V-Mo spring steels, unknown steels, and rebuilding shafts.

 

MSDS

Data Sheet

 

 
 
MG 600 TIG

• Same characteristics as the MG 600, but in a 36” cut length TIG wire.

 

MSDS

Data Sheet

 

 
 
MG 600 MIG

• Same characteristics as the MG 600, but in spooled MIG wire.

 

MSDS

Data Sheet

 

 
 
MG 610

• Heat & corrosion resistant alloy for all grades of stainless steel.
• Heat & scale resistant up to 1200°C (2190°F).
• Good weldability in all positions with little spatter and easy slag removal.
• For uses such as: furnace parts, ladles, high temperature fan blades, and heat treating utensils.

 

MSDS

Data Sheet

 

 
 
MG 610 TIG

• Same characteristics as the MG 600, but in a 36” cut length TIG wire.

 

MSDS

Data Sheet

 

 
 
MG 650

• High grade, extra low carbon Cr/Ni stainless steel electrode.
• Smooth and easily controlled arc in all positions.
• Maximum hot-crack resistance.
• Mirror-like polishable weld deposit.
• For uses such as: food equipment, boilers, kitchen equipment, tanks & containers, and pipes & fittings.

 

MSDS

Data Sheet

 

 
 
MG 650 TIG

• Same characteristics as the MG 650, but in a 36” cut length TIG version.

 

MSDS

Data Sheet

 

 
 
MG 660

• High grade, extra low carbon Cr/Ni/Mo stainless steel electrode.
• Maximum corrosion and hot-crack resistance.
• Polishable, mirror-like deposit.
• Ideal as a protective overlay for steel that must resist corrosion.
• For uses such as: dairy equipment, chemical equipment, paper mill equipment, tanks, pipes, and fittings.

 

MSDS

Data Sheet

 

 
 
MG 660 TIG

• Same characteristics as the MG 660, but in a 36” cut length TIG version.

 

MSDS

Data Sheet

 

 
 
MG 665

• Similar characteristics to MG 660, specially designed for vertical down applications.
• Little spatter, easy slag release.
• For uses such as vertical down welding on pipelines, sheet metal, etc.

 

MSDS

Data Sheet

 

 
 
MG 670

• High deposition build-up electrode.
• Produces a corrosion-resistant stainless steel deposit.
• Little spatter and good slag release.
• Heavy coating provides a 170% deposition rate.
• For uses such as: paper mill equipment, thin gauge steel, cladding mild steel, and austenitic stainless steels.

 

MSDS

Data Sheet

 

 
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