ZT · SJ604 (Fluoro-alkali type)
· Description: SJ604 is a fluorine-based high-basicity sintered flux. It is off-white spherical particles with a particle size of 2.0-0.45mm (10-40 mesh). The flux is neutral in metallurgy, has good welding process performance, stable arc, easy slag removal, beautiful weld formation, high purity of the weld metal, and high low-temperature impact toughness.
· Application: It can weld fine grain low temperature steel and high strength steel with appropriate welding wire, such as low temperature pressure vessels, storage tanks, oil and gas pipelines, offshore engineering, etc.
· Mechanical properties of deposited metal (according to GB / T F48A6-ENi1, equivalent to AWS F7A8-ENi1)
| Pilot projects | tensile strengthR m (MPa) | Yield StrengthR eh (MPa) | ElongationA (%) | AKV（J） |
| -60℃ | ||||
| guarantee value | 480～650 | ≥400 | ≥22 | ≥27 |
| Elongation | 600 | 500 | 27 | 110 |
· Flux composition of deposited metal (%)
| project | C | Mn | Si | S | P | Cr | Ni | Mo | Cu |
| Specified value | ≤0.12 | ≤1.60 | ≤0.80 | ≤0.030 | ≤0.030 | ≤0.15 | 0.75-1.10 | ≤0.35 | ≤0.35 |
| Example value | 0.053 | 1.420 | 0.350 | 0.010 | 0.016 | 0.055 | 0.909 | 0.190 | 0.036 |
· Precautions:
1. Bake at 300 ℃ ~ 350 ℃ for 2h before welding.
2. The rust, oil, moisture and other impurities must be removed at the welding place.
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