![]() These grades cannot be heat treated and rely on cold-working for additional strength. ![]() Each grade offers almost identical corrosion protection, but varies in performance with reference to installation and resistance to chemical attack. This stainless family consisting of type 302, 304, 305 and 316, is one of the most misunderstood. Of these two, the 18-8 series provides the best corrosion resistance and ductility. The two most popular types of stainless steel fasteners are 18-8 (300 series) and 400 series. Generally, stainless grades that have higher chromium content will be more resistant to red rust (iron oxide). Other elements are added in various amounts that will enhance corrosion resistance, workability and increase strength. The chromium reacts with oxygen and forms chromium oxide, which is very thin passive film that is invisible, self-forming and self-healing. It’s primarily this chromium that gives steel its corrosion resistance properties when exposed to weather, much like pure chromium plate used on automobile trim. ![]() Typically, stainless steel is defined as a family of iron-based alloys that contain a minimum of approximately 12% chromium. Post machining decontamination and passivation are recommended.Many people may recognize a fastener made from stainless steel, but find it difficult to determine what grade is needed and how it may perform in the application. MachiningĪlloy 410 stainless steel plate is best machined in the annealed condition at surface speeds of 60 – 80 feet (18.3 – 24.4m) per minute. ![]() If a plate undergoes substantial deformation it should undergo a re-anneal or stress-relieving treatment at about 1202☏ (650☌). For smaller plate deformation such as bending, preheating should be done in the 212 – 572☏ (100 – 300☌) temperature range. It is typically done in the 1382 – 2102☏ (750 – 1150☌) range followed by air cooling. The alloy can be cold worked with moderate forming in the annealed condition. Tempering – Heat to 1100 – 1400☏ (593 – 760☌) for 1 to 4 hours, air cool Cold Forming Stress Relieving – Heat to 300 – 800☏ (149 – 427☌) for 1 to 2 hours, air cool Weight % (all values are maximum unless a range is otherwise indicated)Īnnealing – Heat slowly to 1500 – 1650☏ (816 – 899☌), cool to 1100oF (593☌) in furnace, air cool Oxidation ResistanceĪlloy 410 stainless steel plate resists oxidation up to 1292☏ (700☌) continuously, and up to 1500☏ (816☌) on an intermittent basis. ![]() However, the alloy is prone to chloride attack, particularly in oxidizing conditions.Ĥ10 stainless steel plate stainless steel plate operates well in environments requiring moderate corrosion resistance and high mechanical properties. It performs well in oil and gas applications where desaereted and low hydrogen sulfide exist. The alloy is also resistant to acids contained in foods.Ĥ10 stainless steel plate can also be used in slightly chlorinated and desaereted water. It can be used in environments containing weak or diluted acetic acid, naptha, nitric acid and sulfuric acid. Alloy 410 stainless steel plate is resistant to atmospheric conditions, water and some chemicals. ![]()
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