Instruction and Application: Heat-resisting steel tungsten argon arc welding wire, low content of deposited metal impurities S,P, high intensity, good low temperature impact properties. Apply to the petroleum refining, petrochemical, chemical, power generation, using harsh conditions, such as corrosion medium complex ASME SA542 Tpye of large equipment. Class d. 4, the A832 Gr. 22 v (2.25Cr-1Mo-0.25V) and steel base materials used when welding and submerged-arc-welding bottoming.
Typical Chemical Composition of the wire(％)
|
C |
Si |
Mn |
S |
P |
Cr |
Mo |
V |
Nb |
|
0.09 |
0.17 |
0.48 |
0.004 |
0.006 |
2.28 |
1.02 |
0.26 |
0.03 |
Mechanical Properties of the all-weld metal(％)
|
Temperature |
Tensile strength Rm(MPa) |
Yield strength Rp(MPa) |
Elongation A(%) |
Impact Strength KV2(J,-20℃) |
Heat treatment |
|
Room temperature |
720 |
620 |
21 |
116,122,136 |
705℃×8h |
|
Room temperature |
690 |
602 |
22 |
102,112,126 |
705℃×26h |
Note: Temper embrittlement test VTr54+2.5△VTr54≤10℃.
*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): ≤ 2.5ml/100g
All-weld metal radio-graphic testing:
According to NB / T 47103.2, 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 |
Category |
Gas |
Current (A) |
Ar Gas Flow (L/min) |
Speed (mm/min) |
|
φ0.8mm |
Auto |
Ar or Ar+1~5(%)O2 |
150-170 |
13-14 |
80-120 |
|
φ1.0mm |
Auto |
Ar or Ar+1~5(%)O2 |
150-170 |
13-14 |
80-120 |
|
φ1.2mm |
Auto |
Ar or Ar+1~5(%)O2 |
190-220 |
13-14 |
80-120 |
|
φ1.6mm |
Manual |
Ar or Ar+1~5(%)O2 |
150-170 |
15-17 |
80-150 |
|
φ2.0mm |
Manual |
Ar or Ar+1~5(%)O2 |
160-180 |
15-17 |
80-150 |
|
φ2.4mm |
Manual |
Ar or Ar+1~5(%)O2 |
180-200 |
15-17 |
80-150 |
Notice：
1. Cleaning the oil stain, rust and moisture of the welding surface before welding.
2. The interpass temperature should be controlled into 180°C-250°C.
3. Operate with short arc would be better, arc length controlled to among 1~3mm.
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