Category Archives: FAQs

A: Super Duplex 2507 does provide good resistance to stress corrosion cracking, pitting and crevice corrosion in warm chloride environments to around 570 F, but I think in combination with the sour gas, and perhaps stress of your operation, it … Continue reading

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A: Overall MP35N is perhaps the highest yield strength bolt material available to industry with a typical yield of 250 ksi compared to A286’s 111 ksi; though it is extremely expensive. A286 is a basic high temperature stainless steel material and … Continue reading

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Sound like a good applications for Inconel 718 bolts.  This material has a min ultimate tensile of 180 ksi and typically well into the 200+ range. Because its high nickel content it will do well in sour gas/corrosive environments and … Continue reading

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A:  Monel K500 is a common choice for  cyrogenic fasteners. It can handle temperatures as low as -200°F with virtually no change it is ductility or toughness – in fact at low temperatures K500 actually increases in tensile and yield strength. … Continue reading

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A: All grades of Hastelloy can handle air environments. C276 is also fine in moderately oxidizing environments. What is meant by a strong oxidizer is when it is exposed to oxidizing chemicals like ferric chlorides or highly concentrated nitric acid. … Continue reading

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A: Though ceramics are excellent insulators, they are usually only used for high temperature applications, where polymers are not compatible. For example Alumina ceramic has a usable limit of 1650°C. Since this is a relatively low temperature, your best bet is a … Continue reading

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Inconel 625 is a good material for acid corrosion but for large system of hydrochloric acid, especially with the corrosion that can occur with fumes and vapors, you may want to try a Hastelloy C22 or even tantalum if the … Continue reading

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A:  Metals and plastic have yield strengths because they start to stretch before breaking… the point where they start stretching is the “yield point” and the stress at that point is termed the “yield strength”. Ceramics on the other hand … Continue reading

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A: Of course it depends on the concentrations and temperatures you are operating at but generally speaking a very chemically resistant and strong polymer to consider would be PVDF or Kynar fasteners.   PVDF fasteners offers an ultimate tensile strength of 5000-8000 psi … Continue reading

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A: The problem probably isn’t acid, it most likely has to do with embrittlement of tantalum at elevated temperatures (beyond 250°C) if you are running your process in has oxygen . Tantalum can actually be used in strong concentrations of most … Continue reading

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