Stainless steel wire commonly used in life is used in our lives. The ballpoint pen we see every day, the chain on the lady bag, the protective cover of the electric fan, the umbrella, the hanger, the grill, the barbecue fork, etc. It is made of stainless steel wire in different specifications, so today stainless steel wire manufacturers explain the difference in stainless steel wire material.
First, the copper sulfate point test copper sulfate point test is a simple method to distinguish ordinary carbon steel and other types of stainless steel wire. The concentration of copper sulfate solution used is 5% _10%. Before the test, the oil or other impurities should be cleaned in the test area. And polish a small area with a sander or a soft cloth, then spray the test drip to the sanding area. Ordinary carbon steel or iron will form a layer in a few seconds. The surface is metallic copper, and the surface of the stainless steel wire is not produced by copper precipitation or showing the color of copper.
Touch Test Method The magnetic test method is the first common method for distinguishing between austenitic stainless steel and ferritic stainless steel. Austenitic stainless steel is non-magnetic steel, but has a slight magnetic property after cold pressing under large pressure; and chrome steel and low alloy. Steel is a powerful magnetic steel.
One feature of stainless steel wire is its inherent corrosion resistance to concentrated nitric acid and dilute nitric acid, which makes it easy to distinguish from most other metals or alloys. However, high carbon type 420 and 440 steels are slightly corroded in the nitric acid point test, and non-ferrous metals are corroded when exposed to concentrated nitric acid, which is highly corrosive to carbon steel.
Stainless steel wire manufacturers analyze how to choose materials. The choice of stainless steel materials is mainly considered from the following five aspects.
1. Requirements for mechanical properties, especially strength, of fastener materials.
2. Requirements for the corrosion resistance of materials under working conditions.
3. The working temperature has requirements on the heat resistance (high temperature strength and oxidation resistance) of the material.
4. Requirements for material processing performance in terms of production process.
5, other aspects, such as weight, price, procurement factors must be considered