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Selecting Special Metals for Longer Fastener Life

Selecting Special Metals for Longer Fastener Life
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Selecting Special Metals for Longer Fastener Life - 1

TECHNICAL SOLUTIONS FOR BELT CONVEYOR PRODUCTIVITY Description of Metals Steel Standard fastener metal that is not recommended for environments where corrosion can occur from acids and chemicals. Galvanized Steel For basic light duty applications requiring hooks, galvanized steel is recommended. It is magnetic, offers good abrasion and rust resistance but not recommended for corrosive environments. High Tensile Steel Offers added abrasion resistance and fastener retention strength. Stainless Steel Stainless steel provides extra resistance to abrasion, magnetic attraction, and corrosion from acids and chemicals. Everdur® A corrosion resistant copper and silicon alloy. Fully non-magnetic and spark free, low in resistance to abrasion. MegAlloy® Features superior resistance to wear and abrasion. Provides several times the service life of steel. Not recommended where impact or corrosion is a problem. RustAlloy® Low chrome stainless steel. Resists corrosion from mine water and other types of chemical attack. Promal® A high-grade, heat treated, malleable iron casting. This metal is exceptionally hard and abrasion resistant and also resistant to some corrosion and chemical attack. Monel® A non-magnetic nickel and copper alloy. This metal is more resistant to corrosion and abrasion than stainless steel. Particularly appropriate for contact with certain acids, it has exceptional corrosive resistance in environments that quickly deteriorate carbon and stainless steel, such as brine, hydrogen fluoride, or dry chlorine. Inconel® This metal offers superior corrosion and chemical resistance at elevated temperatures, including sulphur and chloride ions. Phosphor Bronze Provides extra resistance to sparking and is fully non-magnetic. This metal is low in resistance to abrasion and not recommended where corrosion is a problem. Hastelloy C-22 Offers outstanding resistance to both chemical and environmental corrosions. Black Oxide Manufactured black in color to match/blend in with the belt. To maximize fastener service life, fastener material must be matched to the application. The appropriate metal selection will deliver maximum performance in a variety of conditions – from wet and abrasive applications to highly corrosive environments. But when adverse conditions may affect the fasteners, a metal more resistant to its environment should be used. The following special metals are the ones typically used in conveyor belt fasteners. A table on the reverse side of this sheet summarizes the characteristics of each type of metal. Increase Uptime 09-03 Selecting special metals for longer fastener life

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Selecting Special Metals for Longer Fastener Life - 2

Fastener Material Characteristics Metal Magnetic Abrasion Resistance Chemical Resistance Rust Resistance Sparking/ Non-Sparking Flexco® Bolt Solid Plate Flexco® Rivet Solid Plate Flexco® Bolt Hinged Flexco® Rivet Hinged Alligator® Staple Alligator® Lacing Alligator® Rivet Clipper® Wire Hook Steel Yes Good Poor Poor Sparking X X X X X X X X Galvanized Steel Yes Good Poor Good Sparking X High Tensile Steel Yes Good to Excellent Fair Good Sparking X 400 Series Stainless Steel Yes Good Fair to Good Good Sparking X X X 300 Stainless Steel Slightly Good Good to Excellent Excellent Sparking X X X...

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