Gdp E309 ((free)) (2025)

The tensile strength of E309 weld metal is higher than mild steel (E7018 ~480 MPa). This means the weld itself is stronger than the weaker base metal (usually the mild steel side), which is desirable for dissimilar joints. GDP E309 vs. Other Electrodes How does it compare to common alternatives?

But what exactly is GDP E309? In short, it is a classified under the AWS A5.4 specification as E309-16. The "GDP" prefix typically denotes a specific manufacturer’s brand (often associated with high-quality Indian or Asian welding consumables), but the "E309" classification is the universal standard. gdp e309

| Property | Typical Value | | :--- | :--- | | | 550 – 650 MPa (80,000 – 95,000 psi) | | Yield Strength | 400 – 450 MPa (58,000 psi) | | Elongation | 25 – 35% | | Hardness | ~170-200 HB | | Ferrite Number (FN) | 8 – 20 (FN 10-15 typical) | The tensile strength of E309 weld metal is