2. magnetic to determine the authenticity of 304 stainless steel. 304 stainless steel magnetic weakness, so the magnet attraction of 304 stainless steel magnetic is not strong. So to identify 304 stainless steel is not real.
3. Detect with copper sulfate, use copper sulfate to rub the steel to remove the oxidized layer. General stainless steel can be judged after rubbing without discoloration, turning purple can be judged, high manganese steel with or without magnetism, ordinary steel or low alloy steel with magnetism.
Extended data
04 stainless steel as a widely used steel, has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It has good heat workability such as stamping and bending, and no heat treatment hardening phenomenon (use temperature -196℃~800℃). It is resistant to corrosion in the atmosphere. If it is industrial atmosphere or heavily polluted area, it needs to be cleaned in time to avoid corrosion. It is suitable for food processing, storage and transportation. It has good processing performance and welding performance.
Plate heat exchanger, bellows, household goods (1, 2 types of tableware, cabinets, indoor plumbing, water heaters, boilers, bathtubs), automotive parts (windshield wipers, mufflers, molded plastic products), medical equipment, building materials, chemical, food industry, agriculture, ship parts, etc. 304 stainless steel is a nationally recognized food-grade stainless steel.