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- KH-SLA is a co-based hardfacing electrode (equivalent to Stellite 6) and provides corrosion and oxidation resistance. It can be applied in service temperature up to 650°C. It possesses low stress abrasion resistance.
- It is suitable for high temperature abrasion with corrosive environment, such as high temperature valve seats, hot work tools, cutters, gas flow valves, turbine blades and hot press screws.
- It is generally applied in steel mill, chemistry, petrifaction and sugar industries.
Welding Instruction | ||||||||||||||
(1) The dilution rate deteriorates the hardness and corrosion resistance. (2) Dragging a 90-degree angle or a short arc can reduce the dilution of weld metal. (3) Preheat and Int. temperature should be 400~500°C. Use slow cooling after welding to prevent cracks. (4) Dry the electrodes at 200-250°C for 30-60 minutes before use.
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Typical Chemical Composition of Weld Metal (wt. %) | ||||||||||||||
C | Si | Mn | Cr | W | Fe | Co | ||||||||
1.050 | 0.93 | 1.20 | 30.00 | 3.78 | 1.63 | bal. | ||||||||
Typical Hardness of Weld Metal | ||||||||||||||
As-welded hardness（HRC） | High temperature hardness（HRC） | |||||||||||||
Continuous build-up | Interpass temp. 100°C | Preheat 200°C Continuous build-up | 300°C | 400°C | 500°C | |||||||||
39 | 42 | 38 | 40 | 38 | 34 | |||||||||
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