StarBlaze MIG Wire ER309LSi

StarBlaze MIG 309LSi is a premium, extra-low carbon solid stainless steel MIG welding wire featuring an elevated silicon content. Classified under AWS A5.9 as ER309LSi, this wire combines a high alloy profile (23% Cr / 13% Ni) with added silicon to maximize weld pool fluidity, making it the industry benchmark for high-speed dissimilar metal joining and buffer layer cladding.

Core Product Features
Silicon-Enhanced Fluidity: The high silicon addition dramatically improves wetting action at the weld toes, resulting in smooth, flat bead transitions and substantially reducing post-weld cleanup time.
Dissimilar Metal Mastery: The over-alloyed chemistry compensates for dilution when joining stainless steel to mild carbon or low-alloy steels, preventing the formation of brittle martensite structures.
Intergranular Corrosion Resistance: An extra-low carbon design (? 0.03%) prevents chromium carbide precipitation at the grain boundaries, preserving maximum corrosion protection in the heat-affected zone.
Hot-Crack Mitigation: Formulated to deliver a precisely balanced ferrite content in the weld deposit, providing robust resistance against hot cracking during cooling.

AWS Specification: AWS A5.9 / A5.9M (Classification: ER309LSi)
EN ISO Specification: EN ISO 14343-A (Classification: G 23 12 L Si)
UNS Number: S30988
Werkstoff Number (Europe): 1.4332