Steel Bolt Assembly (General Use)
This information reflects our best understanding of product composition in 2015.
Steel Hex Cap Screws, Bolts and Studs for General Use. ASTM A449 describes bolts used for general engineering with tensile strength between 90 and 120 ksi depending on diameter. The steel alloys allowed under the standard are heat treated to...
Steel Hex Cap Screws, Bolts and Studs for General Use. ASTM A449 describes bolts used for general engineering with tensile strength between 90 and 120 ksi depending on diameter. The steel alloys allowed under the standard are heat treated to impart strength. Two compositions of steel are provided in the standard. Type 1 bolts are most commonly used and are the focus of this CP, while Type 3 bolts are intended for applications where resistance to weathering is a concern. Based on previous research that galvanized and related coatings are typically specified only where corrosion is expected, this evaluation assumes a plain, unfinished assembly of bolt, washer and nut.