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Scrap Stainless Steel Identification Method

Feb 20, 2017


Scrap stainless steel high-alloy steels, valued higher than ordinary steel scrap, recycling at home are generally not mixed together. However, often mixed in the imports of scrap iron and steel scrap stainless steel. Encounter such a situation, we can use the test method

  • Toughness and hardness difference: ordinary steel soft and resilient, easy bending easily broken; chromium stainless steel hard, pitted bent not broken; Nickel chromium stainless steel scrap tough, pitted bent not broken.

  • The difference on the oxidation resistance: ordinary steel scrap oxidized and rusting, yellow chromium stainless steel not rust; Nickel chromium stainless steel not rust.

  • Color difference: ordinary steel dark brown; chromium stainless steel pickling waste and white; not acid in brown-black Nickel chromium stainless steel pickling waste silver; no pickling is Brown and white (chromium and nitrogen steel black, hard); cold rolling without annealing silver, reflective, hard.

  • From magnetic to distinguish: ordinary steel scrap in any circumstances to be magnet; chromium stainless steel magnetic, magnet; Nickel chromium stainless steel scrap in the annealed condition, is not magnetic. After the cold and a little magnetic, but of high manganese steel with high manganese and chromium manganese steels not magnetic ...

  • From the difference on gloss: ordinary steel without oxidation glossy and matte chromium stainless steel scrap; chromium nickel stainless steel shiny.

  • Wipe the difference with copper sulfate

  • General scrap was purple;

  • chromium stainless steel scrap no color-scrape Nickel chromium stainless steel oxide layer, drops of water, wipe with copper sulfate does not change color.