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310 Stainless Steel Pan Head Screws
Designed for high temperature applications, 310 stainless steel pan head screws provide high temperature oxidation resistance to 2000°F under mild cyclic conditions. An economic alternative to nickel alloys like alloy 330 or Inconel, 310 screws provide slightly less strength and temperature resistance – but at a significantly lower price point. Alloy 310 pan heads can be used in moderately caburizing, moderately oxidizing, nitriding, cementing and thermal cycling applications when not used at the maximum service temperature. 310SS pan head screws also have good resistance to sulfidation and other forms of hot corrosion. Although primarily known for its high temperature properties, 310 pan heads also provide excellent performance at cryogenic temperatures, with toughness down to -450˚F. Though 310 is ideal for high temperature use, it should not be exposed to the severe thermal shock of repeated liquid quenching or where aqueous corrosive contaminants are present.
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MP35N Pan Head Screws
MP35N pan head screws are known for their extraordinary strength and are the strongest screws we offer at RAYCHIN. MP35N screws owe their extraordinary strength to a unique alloy combination of nickel, cobalt, chrome and molybdenum and have ultimate tensile strengths that range from 227 ksi to 294 ksi (with age hardening). Beyond the strength of MP35N pan head screws, they are also exhibit good corrosion resistance and can resist most mineral acids, hydrogen sulfide, seawater and salt spray environments. MP35N screws are also resistant to high temperature oxidation and could operate in environments up to 800°F and still maintain much of its strength.
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Pan Head Screws
Pan Head Screws RAYCHIN is a manufacturer and worldwide supplier of standard & custom fasteners（Pan Head Screws） including those manufactured from the following materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Nickel 200, Nickel 200, Aluminum, Molybdenum, Nimonic, Nitronic, Tantalum, Tungsten, Waspaloy, Zirconium, Duplex S31803, Duplex S32205 and Super Duplex S32750, etc.
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Monel Pan Head Screws
Monel® pan head screws, like Monel 400 and K500, are made from a nickel-copper alloy and exhibit high strength, toughness and good corrosion resistance over a wide temperature range. An outstanding characteristic of Monel screws is that they offer exceptional resistance to hydrofluoric acid, a particularly tough acid to deal with, in all concentrations up to the boiling point. For hydrofluoric acid applications Monel pan head screws are perhaps the most resistant of all commonly used specialty alloys. Monel alloy 400 & K500 screws also exhibit excellent corrosion resistance in marine applications and have reasonable corrosion resistance to sulfuric and hydrochloric acids under reducing conditions. Because of these characteristics, Monel pan head screws are often found in marine and chemical processing applications.
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Tungsten Pan Head Screws
Tungsten pan head screws are known for their extreme high density; because of this unique attribute, they are often used for balancing rotating parts. Tungsten’s high mass also makes these screws radiopaque. This allows tungsten fasteners to block radiation and show up well on x-rays – even better than lead. Another unique attribute of tungsten is its extrmely high melting point of 3420°C. The high temperature stability of tungsten pan head screws make them ideal for some of the hottest vacuum furnace environments. Beyond their high mass and temperature stability, tungsten fasteners are also very corrosion resistant. Tungsten pan head screws are usually made from tungsten alloys per ASTM B777, and range from 90% to 97% pure tungsten, alloyed with nickel and copper or nickel and iron.
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Tantalum Pan Head Screws
Tantalum pan head screws are best known for its unmatched corrosion resistance and chemical inertness. Tantalum screws have a similar corrosion resistance to that of glass, but all of the typical mechanical and electrical properties of a metal. Tantalum pan head screws are also extremely stable at high temperatures, since tantalum has a melting point around 3000°C. High temperature applications require vaccum or inert gas since tantalum may embrittle when used in oxygen rich environments above 250°C. Tantalum pan head screws are also one of the most bio-compatible metals available and is also radio-opaque due to its high density (16.68 g/cm3). All tantalum screws are available in commercially pure tantalum and tantalum 2.5% tungsten (Ta-2.5%W).
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Molybdenum Pan Head Screws
Molybdenum pan head screws possess a very high melting point of 2620°C, a low coefficient of thermal expansion and a high level of thermal conductivity. Because molybdenum screws have the ability to withstand extremely high temperatures without changing shape, expanding or softening significantly, they are ideal for high strength / high temperature applications that are shielded from oxygen. Exposing molybdenum pan head screws to oxygen above 600°C will cause them to readily oxidize. As a result, molybdenum pan head screws find their way into high temperature vacuum furnaces, glass production, military and space applications where oxygen is not present.
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Inconel Pan Head Screws
Inconel® pan head screws, like Inconel 600, 601,625,686,718 & 725 screws, are a family of nickel-chromium-molybdenum alloys used for their high strength at elevated temperatures and good corrosion resistance. Because of its high thermal stability, Inconel can be used in service temperatures ranging from cryogenic to 2200°F (982°C). The high alloy content of Inconel pan head screws enable it to withstand a wide variety of severe corrosive environments. In mild environments, such as the atmosphere, sea water, neutral salts, and alkaline media, there is almost no attack to Inconel screws. In more severe corrosive environments the combination of nickel and chromium provides resistance to oxidizing chemicals, whereas the high nickel and molybdenum contents supply resistance to nonoxidizing environments.
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Incoloy Pan Head Screws
Not to be confused with Inconel, Incoloy pan head screws are made of a nickel alloy which contains iron and a lower content of nickel. Incoloy is essentially a more economical option to Inconel, yet with more restricted corrosion resistance and temperature limits. Typically, Incoloy is an ideal material for long-term exposure in high temperature environments due to its oxidation, carburization and creep resistance. Incoloy is widely used for its resistance to seawater, brine, sour gas and high chloride environments at elevated temperatures, which make it a popular choice in the oil and gas and power industries.
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