Instruction and Application: Austenitic stainless steel welding, welding with high Cr and Ni contents. ARC surfacing with SJ303 solders used electro-slag surfacing when used with SJ15B flux. Used in demanding situations, such as hydrogenation reactor, nuclear power equipment, chemical equipment, surfacing as a transition layer H308L\/H347L welding with use. When used in conjunction with SJ15B, also available as single layer surfacing.

Typical Chemical Composition(％)：

Typical Chemical Composition of the all-weld metal(％)

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.