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ASTM A354
Scope
The ASTM A354 specification covers the chemical and mechanical requirements of quenched and tempered alloy steel bolts, studs, and other externally threaded fasteners 4"" and under in diameter.
Two strength levels, grade BC and grade BD, are summarized in the chart below. This specification is unrestricted in its configuration and can be a headed bolt, bent bolt, or threaded rod.
Grades
  A354 BD
A354 grade BD bolts are higher in strength than A354 grade BC and equal in strength to ASTM A490 bolts. Unlike ASTM A490 however, the A354 BD specification is unrestricted in its configuration. Since A490 bolts are heavy hex structural bolts and do not exceed 1-1/2"" diameter, specification A354 BD should be considered for anchor bolts, threaded rods, other styles of headed bolts, and bolts larger than 1-1/2"" diameter where similar mechanical properties are desired. A354 grade BD does not require a magnetic particle test as is required by the A490 specification.
Research conducted on bolts of similar material and manufacture indicates that hydrogen-stress cracking or stress cracking corrosion may occur on hot-dip galvanized Grade BD bolts.  For more information about this subject, please see our FAQ that addresses galvanizing of high strength bolts.
  A354 BC
Lower in strength than grade BD.
Mechanical Properties
Grade
Size
Tensile, ksi, min
Yield, ksi, min
Elong %, min
RA %, min
BC
1/4 - 2-1/2
125
109
16
50
2-5/8 - 4
115
99
16
45
BD
1/4 - 2-1/2
150
130
14
40
2-5/8 - 4
140
115
14
40
Recommended Nuts and Washers
Nuts
Washers
Grade BC
Grade BD
Plain
Galvanized
Plain
* Nuts of other grades load stresses greater than the specified grade are suitable.  Follow the link for an ASTM A563 Nut Compatibility Chart.
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