Monel Hex Bolts

Monel® hex head bolts, 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 bolts 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 hex head bolts are perhaps the most resistant of all commonly used specialty alloys. Monel alloy 400 & K500 hex head bolts 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 nickel alloy hex head bolts are often found in marine and chemical processing applications.

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MP159 Hex Bolts

MP159 Hex Head Bolts As aerospace engineering advances, so must the materials to meet the technological requirements of this industry. Bolts made from MP159 have been developed to provide a solution to high temperature, high strength components. MP159 hex head bolts offer strength capabilities similar to other Cobalt Alloys (MP35N) but can be used at much higher temperatures - up to 1100°F, compared to MP35N’s usable limit of 800F. In addition, MP159 hex bolts can be used beyond 1100°F in short term situations.

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Alloy 20 Hex Bolts

Also known as Carpenter 20 and 20CB-3, Alloy 20 hex head bolts offer users a combination of nickel, chromium, molybdenum, and copper which provides good general corrosion resistance. Alloy 20 hex head bolts are best suited for mid-range corrosion use – better than steel alloys but not at the level of high performance nickel based alloys like Hastelloy C276. Alloy 20 is a nickel alloy that was specifically designed to withstand the harsh environment of hot sulfuric acid but also performs well in a variety of other acids. Alloy 20 hex head bolts are an ideal choice when you don’t need the corrosion resistance power and price-tag of high performance nickel alloys like Hastelloy C276; but you need something that will give you more protection than 316 stainless steel or even a Super Duplex 2507 stainless steel.

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Tungsten Hex Bolts

Tungsten hex bolts 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 bolts radiopaque. This allows tungsten bolts 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 hex bolts 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 hex bolts 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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Waspaloy Hex Bolts

Waspaloy hex head bolts are known for their superb high strength at elevated temperatures. Waspaloy is a high performance nickel alloy combined with cobalt, chrome and molybdenum to create it’s unique combination of strength and high temperature stability. Similar to that of Inconel 718 bolts, Waspaloy hex head bolts exceed the strength and stability of Inconel 718 at elevated temperatures beyond 1400°F. In addition, the oxidation resistance of Waspaloy bolts make it an ideal materials for high temperature applications like gas turbines engines, and a variety of other aerospace components.

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Zirconium Hex Bolts

Commercially pure zirconium hex head bolts, also known as zirconium 702, are most well-known for their superior corrosion resistance in some of the harshest environments that include: •  Hydrochloric Acid•  Sulfuric Acid•  Formic Acid•  Nitric Acid •  Acetic Acid   It is also a metal that offers industry unique properties. It does not absorb neutrons, making it ideal for use in nuclear power and at low temperatures it is superconductive, making it ideal for super magnets.

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Alloy 330 Hex Bolts

Alloy 330 hex head bolts are specifically designed for high temperature furnace applications such as vacuum furnaces, heat treating and brazing applications. The most prized trait of alloy 330 is its ability perform under cyclic conditions of temperature extremes from heating and cooling; as well as in alternate carburizing and oxidizing atmospheres. An austenitic, nickel-chromium-iron-silicon alloy, 330 hex head bolts also offer industry a low coefficient of expansion, excellent ductility, and high strength.

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A286 Hex Bolts

A286 bolts, also known as Alloy 660 bolts are stainless steel alloy which contains iron, nickel and chromium. A286 hex bolts are known for their high strength, creep resistance and oxidation resistance at elevated temperatures once age hardened. As a result, A286 hex bolts provide high levels of strength from room temperature up to about 1300°F (700°C). A286 hex head bolts are also mildly corrosion resistant. While they should not be used for strong acid environments, they provide excellent oxidation resistance up to 1500°F (815°C) in conditions that would typically be found in high temperature exhaust streams.

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310 Stainless Steel Hex Bolts

Designed for high temperature applications, 310 stainless steel hex bolts provide high temperature oxidation resistance to 2000°F under mild cyclic conditions. An economic alternative to nickel alloys like alloy 330 or Inconel, 310 bolts provide slightly less strength and temperature resistance – but at a significantly lower price point.  Alloy 310 can be used in moderately caburizing, moderately oxidizing, nitriding, cementing and thermal cycling applications when not used at the maximum service temperature. 310SS hex head bolts also have good resistance to sulfidation and other forms of hot corrosion.  Although primarily known for its high temperature properties, 310 stainless steel also provides excellent performance at cryogenic temperatures, with toughness down to -450˚F. Though 310 hex head bolts are ideal for high temperature use, they should not be exposed to the severe thermal shock of repeated liquid quenching or where aqueous corrosive contaminants are present.

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