AWS A5.4: E309LMo-16 | DIN EN ISO 3581-A: E 23 12 2 LR 12
Rutile Coated | Mo-Alloyed | Cracking and Corrosion Resistant
StarBlaze Prime 309LMo is a low carbon rutile-basic type stainless steel electrode alloyed with 23Cr, 13Ni, and 2.5Mo, containing 15–25% ferrite in the weld metal. It is designed for welding AISI 309 and 316L stainless steels, and for dissimilar joints between stainless and mild steels. Commonly used as a buffer layer before 316L cladding or as a universal electrode in maintenance jobs, it offers smooth arc behavior, self-peeling slag, and excellent resistance to cracking, oxidation, and corrosion.
Available Packs
Typical Weld Metal Chemical Composition (%)
| C | Si | Mn | Cr | Ni | Mo | S | P |
| 0.03 | 0.90 | 1.00 | 23.50 | 13.00 | 2.50 | 0.012 | 0.015 |
Typical Mechanical Properties (All Weld Metal)
| Tensile Strength
Rm (N/mm2) |
Elongation
A5, (%) |
Charpy Impact Value
(ISO-V J RT) |
| 650 | 36 | 70 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 50-80 |
| 3.15 | 80-110 |
| 3.20 | 80-110 |
| 4.00 | 100-140 |
| 5.00 | 150-180 |
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