StarBlaze MIG Wire ER307Si

StarBlaze MIG 307Si is a premium, high-manganese solid stainless steel MIG welding wire featuring an elevated silicon content. Classified under AWS A5.9 as ER307, this wire is specifically modified with silicon (Si) to optimize puddle fluidity, making it the industry standard for joining tough, high-tensile, dissimilar, and armor steels.

Technical Datasheet: View Detailed Datasheet

Core Product Features
“StarBlaze MIG 307Si is a precision layer-wound solid wire designed for MAG welding of stainless and heat-resistant steels. It deposits a Cr-Ni-Mn alloyed weld metal (C-18Cr8Ni6Mn) and delivers excellent arc stability with a smooth bead appearance.”
Silicon-Enhanced Fluidity: The added silicon dramatically increases weld pool fluidity, ensuring flat bead profiles, superb wash-in at the weld toes, and minimal post-weld grinding.
Extreme Crack Resistance: High manganese content (~6%) creates a crack-resistant, fully austenitic weld deposit that absorbs heavy structural shrinkage stress and impact.
Dissimilar Steel Mastery: Perfect for joining difficult-to-weld combinations, such as carbon or low-alloy steels directly to austenitic stainless steels, without creating brittle zones.
Work-Hardening Buffer: Serves as a perfect "cushion" or buffer layer before applying tough hardfacing alloys onto worn industrial equipment.

AWS Specification: AWS A5.9 / A5.9M (Classification: ER307 with high silicon modification)
EN ISO Specification: EN ISO 14343-A (Classification: G 18 8 Mn Si)
Werkstoff Number (Europe): 1.4370