Instruction and Application: Super austenitic stainless steel welding. When SJ385 flux arc surfacing; electro-slag surfacing when used with SJ82B flux. Surfacing material when the dilution rate is low, high deposition efficiency and deposited metal with excellent pitting corrosion and crevice corrosion resistance ability, high stress corrosion cracking resistance, good resistance to intergranular corrosion. Flux process performance, stable welding process, weld bead surface is flat and smooth, fuse is good. Applicable to reactors of petrochemical equipment, heat exchangers and pressure vessel stainless steel double wall surfacing.

Typical Chemical Composition(％)：

Physical and chemical analysis of the flux(％)

Surfacing layer bending performance: After lateral bending test,the sample surface of the surfacing layer shall not be any greater than 1.5mm gap,above the fusion line shall not be any greater than 3mm gap.

Surfacing layer of non-destructive testing: Ultrasonic testing and penetration testing, According to the provisions of NB/T 470130 test results should not be any cracks and lack of fusion.

Reference range:(DC+)

Notice:

1.Redry the flux at 300℃-350℃ for 1hours.

2.The welding consumables surface rust, oil and other impurities must be cleaned up.

3.The base metal should be preheated to 150 ° C before welding. The interpass temperature should be below 250℃.

4.To ensure the quality of welding, the thickness of the transition layer should be guaranteed between 3.0 and 3.5mm, the corrosion layer thickness must be maintained between 3.5-4.0mm.

5.Appropriate the surfacing position to the level to about 2 º uphill welding.