Conforming to：CCS rulrs II YTM III YM
Equivalent to： AWS F6A2-EH12 F7A2-EH14
JIS Y6F53-W41
Description: HJ331 is defined as fused type fluxes with medium manganese, high silicate elements, color in blue-green, with vitreous granules 12-60 meshes in size. Fluxes are suitable for use with both AC and D.C. When applying D.C. the filler-wire will be connected to electrode positive (EP). Fluxes have following features: good welding behaviors and anti-cracking.
Field of application: Fluxes match filler-wire such as SU08、SU26, EH14 etc. of which may be used for welding of mild steel, low alloy steel, high tensile steel (i. GA, 3, 20G, 16Mn, 16MnR, A3, 20G, E36) i. e. ship building and pressure vessels.
Typical compositions of fluxes in (%)
|
SiO2+MnO+Al2O3 |
CaF2+CaO+MgO |
S |
P |
|
20-60 |
10-30 |
≤0.035 |
≤0.04 |
Mechanical properties meet CCS (Rules and regulations of ship’s classification) II YTM III YM：
|
Test item |
ó b MPa |
ó s MPa |
δ 5 % |
cold bend (a=120) |
AKV (J) | |
|
0℃ |
-20℃ | |||||
|
EH14+D36(deposited metal guarantee value) |
490-670 |
≥390 |
≥18 |
OK |
\ |
≥34 |
|
EH14+D36(butt weld metal guarantee value) |
≥490 |
\ |
\ |
OK |
≥34 |
\ |
Remarks:
1.Before welding, fluxes need to be baked for two（2）hours at around 300-350℃.
2.Removal of rust, oil, dirt, water, impurities etc in welding-areas.