Welding materials
E71T-8
E71T-8 |
Meet the requirements: GB/T 10045 T493T8-1NA |
|
490MPaGrade/Self-protection |
Useage:Suitable for outdoor welding of various structural parts such as civil construction, steel frame, chimney, pipeline, etc.
Characteristic:The droplet is a fine droplet transition or jet transition, with good penetration depth and fast filling speed. The weld metal has low sulfur content and good crack resistance. Small wire diameter welding wire can be welded in all positions.
Position of welding:
Chemical composition of deposited metal (wt%):
|
C |
Mn |
Si |
Cr |
Ni |
Mo |
P |
S |
Al |
V |
Cu |
|
| GB/T |
0.18 |
2.00 |
0.90 |
0.20 |
0.50 |
0.30 |
0.03 |
0.03 |
2.0 |
0.08 |
- |
| AWS |
0.30 |
1.75 |
0.60 |
0.20 |
0.50 |
0.30 |
0.03 |
0.03 |
1.8 |
0.08 |
0.35 |
| Example value |
0.041 |
1.46 |
0.40 |
0.03 |
0.01 |
0.01 |
0.017 |
0.007 |
0.02 |
0.03 |
0.016 |
Mechanical properties of deposited metal:
| Tensile strength MPa | Yield Strength MPa | Elongation % | Impact value J/℃ | Heat treatment ℃×h | |
| GB/T |
490-670 |
390 |
18 |
27/-30 |
AW |
| AWS |
490-670 |
390 |
22 |
27/-30 |
AW |
| 例 值 |
550 |
490 |
26 |
105/-30 |
AW |
Welding current parameters：DCEN(DC-)
|
Wire diameter specification（mm） |
1.6 |
2.0 |
|
Voltage（V） |
17-20 |
17-24 |
|
Current（A） |
180-230 |
180-370 |
|
Dry extension(mm) |
20-30 |
20-30 |
Main welding items:
1. Due to the large amount of smoke, pay attention to ventilation when welding in narrow places.
2 Preheating and interpass temperature during multi-pass welding: 150±15℃. After welding, 100℃×48h hydrogen removal treatment is required.
3. The weldments must be cleaned of rust, oil stains, moisture and other impurities before welding.
4. After unpacking the welding wire, pay attention: take moisture-proof measures and use it up as soon as possible. Do not leave the unused welding wire in the air for a long time.
