Non-sparking wrenches are mainly made of beryllium copper alloy and aluminum bronze alloy. Because copper has good thermal conductivity and no carbon property, heat will appear in a relatively short time when tools and objects rub or impact. These heat will be absorbed or transmitted. In addition, copper itself is relatively soft, It has good concession during friction and impact, and small metal particles will not appear easily, so we can't see sparks basically.
The non-sparking wrenches made of copper alloy is a tool made of precious and rare metal synthesis, melting and forging. After the tool is finished, its appearance is yellow, the hardness of the working face is greater than HRC25, and the tensile strength δb> 75-85kgf / mm. Other technical indicators have reached the leading level of similar foreign products. The continuous use in the relatively easy to burn gas ethylene (concentration 7.8%) space ensures safety, and there will be no sparks caused by impact (collision), friction and falling hammer.
Non-sparking wrenches can be used in petroleum refining, petrochemical and oil fields.