ASTM A490发表评论(0)编辑词条
ASTM A490 and ASTM A490M are ASTM International standards for heavy hex structural bolts made from alloy steel. The imperial standard is officially titled Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength, while the metric standard (M) is titled Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints.
Types编辑本段回目录
The type refers to the type of material used. The standard currently defines two types, however it previously defined the following three:
Type 1: Medium carbon alloy steel
Type 2: Low carbon martensitic steel for atmospheric temperature applications(withdrawn from the standard in 2002)
Type 3: Weathering steel
Note that independent of the material the bolt is quench and tempered.
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