ED035088 - Lincoln Blue Max MIG 312 Stainless Wire, 0.045, 33lb Spool

Premium Performance for Hard-to-Weld Steels

Lincoln Electric's Blue Max® MIG 312 (ER312) is the welder's choice for joining steels that are notoriously difficult to weld. This 0.045" solid wire is formulated with a high alloy content—specifically high chromium and nickel—resulting in a two-phase weld structure containing a significant amount of ferrite. This unique metallurgical composition gives the weld deposit exceptional resistance to cracking, even when welding high-carbon steels, tool steels, or spring steels that would normally be prone to failure.

The "Blue Max" designation signifies Lincoln's commitment to superior wire feeding technology. The wire features a specially engineered surface finish that minimizes friction within the liner and contact tip. For the welder, this translates to a smooth, crisp arc that starts easily and maintains stability throughout the pass. The 0.045" diameter is perfectly suited for positional welding on thicker materials, providing deep penetration and a robust bead that stands up to extreme wear and impact. It is often used as a buffer layer in hardfacing applications because it bonds strongly to the base metal while providing a ductile base for harder overlay materials.

When faced with a repair job involving unknown base metals or dissimilar combinations—such as welding 304 stainless to mild steel—Blue Max MIG 312 is the go-to solution. Its high yield strength (typically over 75,000 psi) and high tensile strength (over 100,000 psi) ensure that the weld joint is often stronger than the base materials themselves. The weld deposit work-hardens, making it durable in metal-to-metal wear applications. This spool is designed for standard industrial wire feeders and requires a shielding gas blend, typically Argon/CO2 or Argon/Oxygen, to achieve optimal bead aesthetics and penetration.

Technical Advantages

• Crack Resistance: High ferrite number prevents hot cracking in restrained joints.
• Superior Feedability: Clean surface finish reduces liner wear and feeding issues.
• High Strength: Delivers weld deposits with exceptional tensile and yield strength.