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Views:2 Author:Site Editor Publish Time: 2018-05-10 Origin:Site
In fakes more and more now, even the appearance of the stainless steel wire rope is also fake, and those who buy fakes will feel uncomfortable, it's our money, what to do to avoid such things happening? method teaches you to identify stainless steel wire rope below!
Stainless steel sulfuric acid test
Sulfate immersion test can distinguish between 302 and 304 and 316 and 317. The cutting edges of the specimen shall be subject to fine and volume concentration of CK, temperature for 60~66℃ nitrate (1.42 per cent) cleaning and passivation in half an hour.
Sulfuric acid concentration of the test solution is 10%, heated to 71 degrees when. 302 and 304 steel during immersion in this thermal solution, corroded by quickly and generates a lot of foam, black samples in a few minutes and 316 and 317 steel specimens are not subject to corrosion or reaction is slow (no bubbles), specimens do not change color in 10-15 minutes. If the test sample with a known content simultaneously to an approximate comparison, to make the test more accurate.
Stainless steel-wire copper sulfate test
Copper sulfate test is quick to distinguish ordinary carbon steel and the easiest way to all types of stainless steel. Using the concentration of copper sulphate solution for 5~10%.
Before the trial, test area should be thoroughly remove grease or impurities, using soft cloth polishing a small area and then cleaned with a dropper of regional infusion of copper sulfate solution. Common carbon steel or iron in just a few seconds to form a layer of copper on the surface, but will not generate precipitation of copper or stainless steel surface displays the color of copper.
Stainless steel wire magnetic testing
Test is the difference between magnetic annealing of austenitic stainless steels and ferritic stainless steel the easiest method. Austenitic stainless steels non-magnetic steels, but will have a mild magnetic after cold working under pressure and pure chromium steels and low alloy steels are magnetic steels.
Stainless steel wire hydrochloric acid test
Hydrochloric acid test can be used to convert low-CR-403, 410, 416, 420 steel and high chromium content of 430, 431, 440 and 416 steel apart.
Test drillings into the equivalent weight of hydrochloric acid solution whose concentration is 50%, the color intensity of the solution, darker green of steel with high CR content.
In each test tube into the sample a few grams of drill cuttings, and then to each test tube into an equal number of volume concentration of reheaters hydrochloric acid solution; after 3 minutes, the solution changes as shown in the following table. Steel color solution.
302 quite fast light green blue
303 (Se) issued garlic light amber
Fortune 410 is marked with 302 steel, green deep
416 soon issue similar to the smell of rotten eggs smell deep dark green
301, 304, 310, 316, 347, the steel reacts with acid solution similar to the 302 steel slowly appear light green blue, but no garlic. Stainless steel wire.
Stainless steel wire nitric acid test
A notable characteristic of stainless steel is concentrated nitric acid and diluted nitric acid have inherent corrosion resistance. This performance so that it can be easily from the majority of other metals or alloys to be differentiated. High carbon 420 and 440 steels in nitrate test is slightly corroded, non-ferrous metals met immediately when concentrated nitric acid corrosion. Dilute nitric acid on the corrosion of carbon steel with a strong.