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Costa-Rica WD-308L Steel strip with pole cladding for stainless steel
Category:
Product Description
Standards：
JB/T4747 HD308L AWS A5.9 EQ308L EN12072 19 9L ISO 14343 B-BS308L
Introduction：
WD-308L is mainly composed of low C-18Cr-8Ni and can be used in submerged arc surfacing and electroslag surfacing with poles. WD-308L can be surfaced on WD-309L overlay layer or in single layer surfacing with electroslag surfacing method. It has high surfacing efficiency, low dilution rate of base material and beautiful weld channel formation. The flux has smooth lap fusion and low content of impurity elements in the overlay metal.
Applications：
It is widely used for overlay welding of hydrogenation equipment, nuclear vessels, urea equipment, offshore platform equipment, etc. in petrochemical industry.
Chemical composition reference value (%)：
|
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
N |
|
308L |
0.015 |
0.35 |
1.8 |
0.015 |
0.001 |
19.5 |
10.6 |
0.01 |
0.035 |
Notice：
1. Before welding, it is strictly necessary to polish the base material to remove rust, oil and other factors affecting welding, and must be preheated.
2. When overlaying the transition layer, ensure that the weld channel forming premise as far as possible to reduce the transition layer overlay thickness (3-3.5 mm); When overlaying the corrosion resistant layer, ensure that the weld channel forming premise can be appropriate to increase the thickness of the corrosion-resistant layer (3.5-4 mm).
3. The use of flat characteristics of power shows better results.
4. The overlay welding position to the level to about 2 ° of the upper slope welding is appropriate.
Recommended welding parameters：
|
Recommended process specification parameters for submerged arc surfacing method |
|||||||
|
Welding tape size (mm) |
Cladding current |
Cladding voltage |
Cladding speed |
Band pole elongation |
Flux thickness (mm) |
Weld lap edge (mm) |
Welding channel stack height (mm) |
|
0.5*60 |
700-1000 |
28-32 |
140-220 |
30-40 |
- |
1-8 |
3.0-5.0 |
|
0.4*50 |
550-800 |
28-32 |
140-220 |
30-40 |
- |
4-8 |
3.0-5.0 |
|
Recommended process specification parameters for electroslag welding method |
|||||||
|
Welding tape size (mm) |
Cladding current |
Cladding voltage |
Cladding speed |
Band pole elongation |
Flux thickness (mm) |
Weld lap edge (mm) |
Welding channel stack height (mm) |
|
0.5*60 |
700-1000 |
24-30 |
140-220 |
30-40 |
20-30 |
5-12 |
3.0-5.0 |
|
0.4*50 |
550-800 |
24-30 |
140-220 |
30-40 |
15-25 |
5-12 |
3.0-5.0 |
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