Instruction and Application: HW-X90G is a dedicated pipeline steel flux-cored wire for submerged arc welding and flux combination SJ18G, SJ18G ultra low hydrogen sintered flux, basicity B>2. Flux process performance, deposited metal purity and low content of S,P, and good mechanical properties. For X90 welding of pipeline steel and low alloy high strength steel structures of steel, low temperature performance.
Typical Chemical Composition of the wire(％)
|
C |
Si |
Mn |
S |
P |
Ti |
Mo |
Ni |
|
0.11 |
0.16 |
1.86 |
0.005 |
0.008 |
0.06 |
0.32 |
0.32 |
Typical Chemical Composition of the all-weld metal(％)
|
C |
Si |
Mn |
S |
P |
Ti |
Mo |
Ni |
|
0.06 |
0.28 |
1.52 |
0.007 |
0.012 |
0.012 |
0.30 |
0.21 |
Mechanical properties of All-weld metal
|
Temperature |
Tensile strength Rm(MPa) |
Yield strength Rp(MPa) |
Elongation A(%) |
Impact Strength KV2(J,-40℃) |
|
Room temperature |
780 |
650 |
23 |
96,89,92 |
*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).
HD (Mercury method): ≤ 4.0ml/100g
Physical and chemical analysis of the flux(％)
|
|
Mechanical inclusion |
Moisture content |
S |
P |
|
SJ18G |
0.16 |
0.04 |
0.016 |
0.023 |
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 |
450-500 |
|
φ4.0 |
500-550 |
28-32 |
450-500 |
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℃.
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