HJ107:  GB/T 17854-1999   F308-H0Cr21Ni10
                                                 F308L-H00Cr21Nni10

LH-HJ107 is a kind of smelting-type non-Mn mid-Si and mid-F flux,which appears grey-black pumice-like particles with the mesh of 10-60(2.0-0.3mm) or 8-40(2.5-0.45mm). It uses direct-current main. When it is used under higher arc voltage, the penetration is shallow,the arc is stable and the appearance of weld is pleasing to the eyes.Meanwhile,the consumption of flux is low and it is easy to detach the welding slag.Because it contains more CaF2 and also cryolite is added in,its abliity of anti-porosity and anti-cracking is greatly improved.In addition,adding Cr203 into it not only makes the weld face appear pumice-like but also reduces the loss of Cr in the process of stainless welding.
Usage:
Excellent surfacing layers can be gained when it is used in the build-up welding in conjunction with appropriate welding wires or bands(such as HOCr21Ni10,HOCr20Ni1OTi,HOOCr21Ni10,HOOCr24Nb,HOCr16Mn16,etc).It is suitable for the build-up welding of nuclear containers and petrochemical equipment's corrosion-proof layers,stain-less clad layers and pressure vessels.In conjunction with HOCr16Mn16,it can be used in the build-up welding of the switch of austenitic manganese steel(Mn13) and welding of Nb-contained stainless steel,etc.
Performance of Surfacing Layers:
(It can be used in the transition-layer welding in conjunction with HOOCr26Ni12 and in the build-up welding of 50mm-thick 18MnMoNb steel plate in conjunction with HOOCr21Ni10 as the surface-layer welding band.)
Cautions:
1.Impurities on the welding surface must be removed before welding,such as oil soil,moisture,iron rust,etc.
2.The flux must be baked for 2 hous under the temperature of 250-300ºC before it is used.
(Chemical Composition)(%)