Details

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KN-818C2
Type of coating: Iron powder low hydrogen type
It is suitable for welding 540N/mm2 grade steel for low temperature resistance
It is ideal for welding in LNG storage tanks or 3.5% Ni steel for low temperature resistance

Classification


Application and Features 

• It is suitable for welding 540N/mm2 grade steel for low temperature resistance
• It provides high deposition rate, good mechanical properties and X-ray quality welds
• Weld metal contains 3.5%Ni and good impact properties at -75°C
• It is ideal for welding in LNG storage tanks or 3.5% Ni steel for low temperature resistance

Welding Position


Welding Instruction

1. Clean up the contaminations on the steel.
2. Dry the electrodes at 350~400°C for 60 minutes before welding.
3. Keep arc as short as possible. Take the back step method to prevent porosity at arc start and re-start. (Please refer to Appendix A).
4. High heat input will lower the impact value. Please carefully select the welding current.
5. The preheat temperature for thick plate is 90~110°C

Application
- It is ideal for welding in LNG storage tanks or 3.5% Ni steel for low temperature resistance

Typical Chemical Composition of Weld Metal (wt%)


Typical Mechanical Properties of Weld Metal


Size and Suggested Operation Range (AC or DC±)