Instruction and Application: Solder H09MnNi2DR and flux SJ208DR combined, SJ208DR for ultra-low hydrogen sintering flux, alkalinity B > 2.0, for circular granular, particle size of 2.0 ~ 0.28mm (10 ~ 60 mesh).The welding process is excellent, the weld metal is pure, the content of S and P is low, and the comprehensive performance is good.Applicable to coal chemical industry and petrochemical industry - 70 ℃ low temperature steel pressure vessel welding, such as ASME SA 203 Gr. E (09 MnNiDR) submerged arc welding of steel.
Typical Chemical Composition of the wire(％)
|
C |
Si |
Mn |
S |
P |
Ni |
|
0.04 |
0.20 |
0.80 |
0.002 |
0.003 |
2.55 |
Typical Chemical Composition of the all-weld metal(％)
|
C |
Si |
Mn |
S |
P |
Ni |
|
0.03 |
0.21 |
0.74 |
0.004 |
0.005 |
2.53 |
Mechanical properties of All-weld metal
|
Temperature |
Tensile strength Rm(MPa) |
Yield strength Rp(MPa) |
Elongation A(%) |
Impact Strength KV2(J,-70℃) |
Heat treatment |
|
Room temperature |
535 |
455 |
27.5 |
157,147,136 |
590℃×5h |
*In practice, the heat treatment system shall be formulated separately by the supply and demand parties or by the conditions of the working conditions (such as the thickness of the specimen).
Physical and chemical analysis of the flux(％)
|
|
Mechanical inclusion |
Moisture content |
S |
P |
|
SJ208DR |
0.11 |
0.04 |
0.018 |
0.021 |
HD (Mercury method): ≤ 4.0ml/100g
All-weld metal radio-graphic testing:
According to NB / T 47013.2, the radio-graphic detecting technique should not be less than class AB and the quality grade of all-weld metal should not be less than Class I.
Reference range (DC﹢)
|
Sizeφ(mm) |
Current (A) |
Volt (V) |
Speed (mm/min) |
|
φ3.2 |
450-500 |
28-32 |
480-520 |
|
φ4.0 |
500-550 |
28-32 |
480-520 |
Notice：
1.Redry the flux at 300-350℃ for 2 hours.
2.Cleaning the oil stain, rust and moisture of the weldment surface before welding.
3.Multi-pass welding must clean the welding slag. Each layer is controlled below 150℃.
上一篇：H09MnNiG/SJ18G
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