Hot Search: Welding electrodes for carbon steel Welding electrodes for stainless steel
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| D557 | According with GB EDCrNi-C-15 | ||||||||||||||||
| Introduction: D557 is a kind of CrNiSi valve surfacing electrode with low-hydrogen natrium type coating. The surfacing metal is strengthened due to a great deal of silicon, and austenitic and ferritic structures are obtained. As the ageing time increases, the hardness and the scratch-resistance can be improved further. The surfacing metal has excellent erosion-resistance, oxidation-resistance and corrosion-resistance. DCRP (Direct Current Reversed Polarity). | |||||||||||||||||
| Uses: Used for surfacing welding on sealing faces of high pressure valves below 600℃. | |||||||||||||||||
| Chemical Composition of Deposited Metal (%)
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| Hardness of Surfacing Layer:HRC≥37 | |||||||||||||||||
| Reference Current(DC+)
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| Instructions: 1.The electrodes must be baked under 300-350℃ for an hour before welding. 2.The hardness of the surfacing metal is higher, so different preheating temperatures and slow cooling measures should be used according to the sizes and shapes of the work pieces. Generally the preheating temperature should be 300-450℃, and short arc and weak current had better be used in surfacing welding. | |||||||||||||||||
| D557 | According with GB EDCrNi-C-15 | ||||||||||||||||
| Introduction: D557 is a kind of CrNiSi valve surfacing electrode with low-hydrogen natrium type coating. The surfacing metal is strengthened due to a great deal of silicon, and austenitic and ferritic structures are obtained. As the ageing time increases, the hardness and the scratch-resistance can be improved further. The surfacing metal has excellent erosion-resistance, oxidation-resistance and corrosion-resistance. DCRP (Direct Current Reversed Polarity). | |||||||||||||||||
| Uses: Used for surfacing welding on sealing faces of high pressure valves below 600℃. | |||||||||||||||||
| Chemical Composition of Deposited Metal (%)
| |||||||||||||||||
| Hardness of Surfacing Layer:HRC≥37 | |||||||||||||||||
| Reference Current(DC+)
| |||||||||||||||||
| Instructions: 1.The electrodes must be baked under 300-350℃ for an hour before welding. 2.The hardness of the surfacing metal is higher, so different preheating temperatures and slow cooling measures should be used according to the sizes and shapes of the work pieces. Generally the preheating temperature should be 300-450℃, and short arc and weak current had better be used in surfacing welding. | |||||||||||||||||
