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DUPLEX-325 N

Unitor DUPLEX-325 N is a rutile basic type electrode for welding of Duplex stainless steel used in tanks, cargo loading pipes, heating coils and ladders. Duplex stainless steel consists of two phases; austenite and ferrite, both about 50%. The combination of these two in one structure, results in a very high yield and tensile strength as well as an excellent protection against chloride-induced stress, corrosion and pitting.

DUPLEX-325 N can also be used for joining Duplex steel to mild steel, Duplex to stainless and stainless to mild steel.

It has high resistance to general corrosion and pitting corrosion. Applic­ able up to service temperatures of 250°C. Use a short arc. A long arc will increase arc tension, resulting in lower current output and poor fusion.

Name

Material

1.

2.

3.

4.

Mild steel.

Mild steel.

Mild steel.

Mild to Duplex.

Stainless steel.

Duplex stainless steel. Duplex stainless steel.

Hull.

Hull (Section weld).

Stiffeners to hull.

Stiffeners to bulkhead panel.

5. Tanktop.

6a. Bulkhead panel.

(Section weld).

b. Bulkhead to corrugated bulkhead panel.

7. Bulkhead panel to tanktop + corrugated bulkhead panel to tanktop.

8. Tanktop.

Best result is obtained using Unitor Pickling Gel to remove discolouration and oxides after welding.

3.01

Duplex stainless steel. Duplex stainless steel.

Duplex stainless to mild steel.

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