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Ag series: Silver and fine silver possess very high electric and thermal conductivity, low and stable contact resistance and good processing and welding performance. Because of a little nickel added into silver, fine silver has higher intensity and thermal- resistance performance than silver under the same contact resistance. Therefore, its fusion resistance and arc burning resistance are better than that of silver. Under the same application condition, fine silver can take the place of silver. AgNi series: AgNi material with 10-40% of high melting-point metal nickel has high electric conductivity, low contact resistance and little burning loss. This material has little transfer when connecting and breaking direct current. AgNi material are widely used in AC and DC low-voltage devices, such as relays, instruction switches, can switches, assisting contactors. Instrument switches, optical control switches, temperature controller and washing machine timers. AgCdO series: AgCdO is the most used contact material at present. CdO obviously increased the fusion resistance or cohesive resistance of the contacts at the moment of getting through big current. The sublimation of CdO cools the contact surface, lowers the arc energy and extinguishes the arc. Therefore, AgCdO can meet the main requirements of low-voltage apparatus to contacts, such as arc burning resistance at big-current switching-on, low and stable contact resistance under various loads and good arc extinguishing performance. Since Cd pollutes the environment, it is substituted by other materials. AgSnO2 series (Cd free): This material is produced by dispersing SnO2 Oxidation in silver base produced by powder method and keeps up superior electric conductivity with improved anti-arc, anti-fusion, anti-abrasion. This material, as silver oxidation dispersed strengthening type alloy dispersion, features that SnO2 is thermally stable and AnO2 is distributed fully on Ag Metrics as a high anti-arc, anti-fusion, anti-abrasion pre-oxidizer material. Especially, this material possesses excellent properties for the use of relay and switch at heavy load area of DC. AgSnO2In2O3 series (Cd free): This is the superior material in the properties of anti-fusion and anti-abrasion under various load conditions because it is Cd-free material, now one of the serious environmental issues, and it is produced by internal oxidization method alloying Ag-Sn alloy with many additive elements. This is used for AC and DC Load. AgCu series: Anti-discoloration decreases depending on the content of copper, while hardness and mechanical anti-abrasion increases. Contact strength is strong and it is not usable if there is a sliding contact when it operates.

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Shanghai China-hope Electrical Alloy Co., Ltd

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