Description
NSS-309L is a premium low-carbon stainless steel electrode engineered for welding dissimilar metals, heat-resistant steels, and clad steel layers. Its lime-titania coating provides a smooth, stable arc, excellent puddle control, and spatter-free operation—making it ideal for both workshop and field welding.
The weld metal composition of 25% Chromium and 12% Nickel delivers strong resistance against oxidation, heat, and intergranular corrosion. Thanks to the low carbon content, NSS-309L offers enhanced corrosion resistance compared to ordinary 309 electrodes, especially in critical stainless applications.
With its versatile all-position usability and CE approval, NSS-309L is widely used in chemical plants, furnace components, and stainless-steel repair work.
TYPICAL CHEMICAL COMPOSITION OF WELD METAL (%)
| C | Si | Mn | Cr | Ni |
|---|---|---|---|---|
| 0.03 | 0.37 | 1.88 | 24.02 | 13.21 |
TYPICAL MECHANICAL PROPERTIES
| Property | Value |
|---|---|
| Yield Strength | 430 N/mm² (43.8 KSI) |
| Tensile Strength | 565 N/mm² (57.6 KSI) |
| Elongation | 43% |
SIZES & RECOMMENDED CURRENT RANGE
Polarity: AC, DC(+)
| Diameter (mm) | Length (mm) | Flat (A) | Vertical / Overhead (A) |
|---|---|---|---|
| 2.5 | 300 | 40–80 | 40–80 |
| 3.2 | 350 | 60–110 | 60–110 |
| 4.0 | 350 | 90–150 | — |
| 5.0 | 350 | 140–190 | — |
WELDING POSITIONS
FLAT • HORIZONTAL • VERTICAL UP • OVERHEAD • FILLET
APPROVALS
CE
APPLICATIONS
-
Welding of AISI 309S & heat-resisting cast steels
-
First-layer welding of stainless clad steel
-
Dissimilar metal joints (stainless to carbon steel)
-
Chemical plant equipment
-
Furnace & heat-resistant parts
REMARKS & RECOMMENDED PRACTICES
-
Avoid excessive current to reduce dilution, especially in dissimilar metal welding
-
Keep arc length short for clean bead appearance
-
Use correct recommended amperage for best performance
IMPORTANT NOTICE
Technical data provided represents typical values from controlled weld tests. Actual results depend on base metal chemistry, welding procedures, joint design, and operator technique. Users should validate suitability through qualification testing.
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