Instruction and Application: - 70 ℃ low temperature steel with tungsten argon arc welding wire, deposited metal impurities low content of S and P, good low temperature impact toughness, strength is moderate.Suitable for ASME SA 203 Gr. E (09MnNiDR) and other - 70 ℃ low temperature steel welding or render.
Typical Chemical Composition of the wire(％)
|
C |
Si |
Mn |
S |
P |
Ni |
|
0.04 |
0.44 |
0.82 |
0.002 |
0.004 |
3.56 |
Mechanical Properties of the all-weld metal(％)
|
Temperature |
Tensile strength Rm(MPa) |
Yield strength Rp(MPa) |
Elongation A(%) |
Impact Strength KV2(J,-70℃) |
Impact Strength KV2(J,-80℃) |
Heat treatment |
|
Room temperature |
592 |
490 |
28 |
210,206,208 |
190,186,188 |
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).
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 |
Hand |
Ar or Ar+1~5(%)O2 |
150-170 |
15-17 |
80-150 |
|
φ2.0mm |
Hand |
Ar or Ar+1~5(%)O2 |
160-180 |
15-17 |
80-150 |
|
φ2.4mm |
Hand |
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 to below 150°C.
3. Operate with short arc would be better, arc length controlled to among 1~3mm.
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