What kind of welding rod Z208 is the main material for welding?
CHC208 (Z208)Compliance: GB EZCDescription: CHC208 is a kind of cast iron welding electrode made of carbon steel core and strongly graphitized leather. The weld becomes gray cast iron when it becomes cool. But the crack resistance is poor. The welding rod can be AC and DC dual-purpose, and the price is low.Application: used to repair the defects of gray iron castings. Deposited metal chemical composition: (%)C, Mn, Si, S, P, Fe2.00-4.00 = 0.75, 2.5-6.5 = 0.10 = 0.15Reference current: (AC or DC+)Electrode diameter (mm) 3.2, 4, 5Welding current (A) 90-120, 150-180, 190-220Matters needing attention：1., small thin-walled castings, steel parts of the defect, can not preheat welding, and general welding parts need preheating 400 degrees or so, welding after heat preservation and cold, then welding repair is possible to carry out cutting.2. it is not suitable to use the welding rod for the important casting structure to bear the stress and impact.3. before welding, the electrode should be baked for about 1 hours at 150C.
Z208 is a steel core graphite cast iron electrode, mainly used for cast iron heating (generally heated to 600-600 DEG C) welding, a homogeneous weld electrode, cheap, low cost, but the welder's labor intensity, poor working conditions.
The welding rod Z208 belongs to the low carbon steel core, strengthens the graphite coating the cast iron welding rod.Welding rod Z208 welding base material: mainly used for iron parts defects repair, crack resistance is poor.Attention to welding Z208 welding rod:A small thin-walled castings, steel parts of the defect can not be preheated welding, while the general welding needs preheating 400 degrees or so, after welding insulation and cold, then welding may be carried out cutting.For the important casting structure to bear stress and impact, the welding rod should not be adopted.Before welding, the electrode should be baked for about 1 hours at around 150C.
