ASTM F1554 grade 105 anchor bolts are manufactured from medium carbon alloy steel that has been quenched and tempered (heat treated) to develop the desired mechanical values. This is the highest strength version of the F1554 specification, with a minimum yield strength of 105 ksi, covering anchor bolts in diameters ranging from 1/2″ through 3″.
F1554 grade 105 bolts can be galvanized even though they are relatively high in strength. The galvanizing does not affect the mechanical properties of the anchor bolt and will not cause hydrogen embrittlement.
F1554 grade 105 anchor bolts should not be welded. Since they develop their strength characteristics through a heat treating process, applying heat (welding) in an uncontrolled environment could change the mechanical properties of the anchor bolt. The Ninth Edition of the AISC (American Institute of Steel Construction) Steel Construction Manual (page 4-4) states, “Anchor bolt material that is quenched and tempered (heat treated) should not be welded or heated.”
Charpy impact testing can be requested as a supplementary requirement. Supplemental S4 designates impact testing at +40°F and is applicable to both grades 55 and 105. Supplemental S5 designates impact testing at -20°F and is applicable only to grade 105. In both cases the minimum v-notch energy requirement is an average of 15ft-lbs for three specimens, with no one specimen falling below 12ft-lbs.
|Grade||Identification||Size, Inches||Tensile, ksi||Yield, ksi min||Yield, MPa min||Elong. % min||Reduction of Area %, min|
|105||1/2 – 3||125 – 150||105||724||15||45|
|1Color coding (red) is required while permanent stamping with manufacturer’s identification (S2) and grade designation (S3) are supplementary requirements.|
Nuts and Washers
|Grade||Identification||Size, Inches||Recommended A563 Nut||Washer|
|Plain Finish||Hot-Dip or Mechanical Zinc Coated|
|105||1/2 – 1-1/2||D1||Heavy Hex||DH2||Heavy Hex||F436|
|1-5/8 – 3||DH2||Heavy Hex||DH2||Heavy Hex|
|1 A563 grade D nuts are rarely available. A563 grade DH or A194 grade 2H should be substituted.
2 The availability of A563 grade DH nuts in nominal sizes 1″ and larger is very limited and generally available only on special orders of 50,000 or more. For smaller quantities, ASTM A194 grade 2H should be considered.