Posted by Robert Hernandez on Feb 14th 2025
| Term | Definition |
|---|---|
| Machinability | The ability of a part to be machined or ground to size. |
| Magnetic field | The field created around a wire or electrode whenever electricity travels through that wire or electrode. |
| Magnetic particle inspection | Procedures used to check a weld for flaws, using a liquid that contains particles. The particles are drawn into the flaws when a magnetic field is applied to the weldment. |
| Malleable castings | Cast forms of metal which have been heat-treated to reduce their brittleness. |
| Mandrel | A solid, pointed shaft that is forced through a nearly molten metal rod to form seamless tubing. |
| Manifold | A multiple header for connection of individual gas cylinders or torch supply lines to several work stations. |
| Manual welding | Welding wherein the entire welding operation is performed and controlled by hand. |
| Mechanical drawings | Parts or assembly drawings made by mechanical means, either traditional board drafting or CAD (computer aided drafting). |
| Mechanical properties | A description of a material’s behavior when force is applied to determine that material’s suitability for mechanical use. Examples: tensile strength, hardness, modulus of elasticity, elongation, and fatigue limit. |
| Megapascal | (MPa) One million pascals. A pascal is the metric measure of pressure. |
| Melting range | The temperature range between solidus and liquidus. |
| Melt through symbol | A symbol used on the welding symbol to indicate 100% penetration on a weld made from one side of the base metal. |
| Metal transfer | Movement of metal from one surface to another. |
| Metal transfer wear | Wear that occurs when metal leaves one surface and fuses or sticks to another surface. |
| Metal-to-metal wear resistance | The ability of a material to resist wear from metal-to-metal contact. |
| Microprocessor | An integrated circuit that is programmed to store functions. |
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MIG (GMAW or Gas Metal Arc Welding) |
A welding process that joins metals by heating them with an arc shielded by externally supplied gas or gas mixture. In short-circuit transfer, metal is deposited when the wire touches the workpiece. Spray transfer, another type of MIG welding, moves a stream of tiny molten droplets from the arc to the weld puddle. |
| Monster TIG Nozzles | Monster™ TIG/GTAW welding nozzles (cups) are engineered to deliver a coherent stream of shielding gas for improved weld quality, consistency, and reduced post-weld cleanup. Ideal for welding exotic materials such as titanium, Inconel, Hastelloy, Monel, stainless steel, Chromoly, Docol R8, and more. They allow longer tungsten stick-out for better joint access and visibility, improve gas coverage and arc stability, work with standard gas lens collet bodies, require no O-rings, and are lightweight and compact. |
| Motor-driven beam mounted torch | A type of automatic cutting machine that uses an electronic tracer to follow the edge of a pattern. The tracer may control one or more cutting torches mounted to the beam. |
| Motor-driven magnetic tracer | A relatively inexpensive automatic cutting machine that works best with shapes that are not too complex. The magnetic tracer follows a steel pattern. One torch is generally carried on this type of machine. |
| Multi-pass weld | A welding joint requiring multiple passes to complete. |
