Instruction and Application: 304L (022Cr19Ni10) type super low carbon austenitic stainless steel welding. ARC surfacing with SJ303 solders used electro-slag surfacing when used with SJ15B flux. Impurities deposited metal low c, s and p, good mechanical properties and corrosion resistance. Flux process performance, stable welding process, slag off easy, smooth weld bead surface, fuse good, low dilution rates. Apply to petrochemicals, coal chemical industry, boilers, nuclear power equipment, such as stainless steel corrosion resistance layer (second layer and a second layer above) surfacing. Transition layer Ribbon made of H309L or H309L (2413).
Typical Chemical Composition(％)：
|
|
C |
Si |
Mn |
S |
P |
Cr |
Ni |
δFe |
|
Strip H308L |
0.021 |
0.35 |
2.03 |
0.003 |
0.018 |
20.3 |
10.6 |
- |
|
All-welded Metal(SAW) |
0.029 |
0.80 |
1.18 |
0.009 |
0.019 |
19.5 |
10.2 |
7.5 |
|
All-welded Metal(ESW) |
0.026 |
0.45 |
1.53 |
0.006 |
0.018 |
19.7 |
10.3 |
7.9 |
Physical and chemical analysis of the flux(％)
|
|
Mechanical inclusion |
S |
P |
|
SJ303 |
0.12 |
0.022 |
0.012 |
|
SJ15B |
0.09 |
0.018 |
0.011 |
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+)
|
Welding Method |
Size (mm) |
Amperage (A) |
Volt (V) |
Speed (mm/min) |
|
SAW |
0.4×50 |
600-800 |
28-30 |
150-200 |
|
0.5×60 |
800-1000 |
28-30 |
150-200 |
|
|
ESW |
0.4×50 |
700-900 |
25-27 |
150-220 |
|
0.5×60 |
1000-1200 |
25-27 |
150-220 |
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.
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