Technical Info and ASTM Specifications

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Galvanized Anchor Bolt Strength Chart

Galvanized anchor bolts are ordered to a large variety of ASTM specifications. The most common one in use today is F1554 which is the ASTM anchor bolt specification.

Grade Marking Specification Nominal Size (In.) Mechanical Properties
Proof Load Min (ksi) Yield Strength Min (ksi) Tensile Strength Min (ksi) Elong % Min RA % Min

One End Blue		 F1554 Grade 36 1⁄2” – 4″ - 36 58 min 80 max 23 40

One End Yellow		 F1554 Grade 55 1⁄2” – 2″ - 55 75 min 95 max 21 30
21⁄4“- 21⁄2“ 21 30
23⁄4” – 3″ 21 30
31⁄4” – 4″ 21 30
A193/A320 Grade B8 Class 1 No Restrictions - 30 75 30 50
A193/A320 Grade B8M
A449 Type 1 1⁄4” – 1″11⁄8” – 11⁄2“15⁄8” – 3″ 857,455 928,158 12,010,590 14 35
A193 Grade B7 1⁄4” – 21⁄2“25⁄8” – 4″41⁄8” – 7″ - 1,059,575 125,115,100 161,618 505,050
A354 Grade BC 1⁄4” – 21⁄2“25⁄8” – 4″ 10,595 10,994 125,115 1,616 5,045

One End Red		 F1554 Grade 105 1⁄2” – 3″ - 105 125 min 150 max 15 45
A320 Grade L7 1⁄4” – 21⁄2“ - 105 125 16 50
A354 Grade BD 1⁄4” – 21⁄2“25⁄8” – 4″ 120,105 130,115 150,140 14 40

ASTM Specifications

F1554 ASTM F1554 was developed to specifically cover anchor bolts and is the most widely used specification for this application. This specification includes 3 grades of anchor bolts including grade 36, 55, and 105. The grade corresponds to the minimum yield strength of the anchor bolt.
A307 Grade C of the A307 specification formerly covered anchor bolts, but in 2007 was replaced by F1554 Grade 36. Theoretically, Grades A and B could be used as anchor bolts, but technically they are not anchor bolt specificaitons. For mild steel anchor bolts with similar chemical and strength requirements, F1554 Grade 36 should be considered.
A449 This is a medium strength, quenched and tempered grade of bolt used for general applications, including anchor bolts. It is manufactured from medium carbon or alloy steel and heat treated to the required strength.
A325 Although this specification is occasionally specified for anchor bolts, technically it is a heavy hex head bolt with short thread lengths designed for structural steel connections. Anchor bolts should be manufactured to the A449 specification which has virtually identical chemical and physical properties. Section 1.5 of the A325 specification refers you to A449 for anchor bolts.
A354 This is a quenched and tempered bolt made from alloy steel and heat treated to the required strength. There are 2 grades, BC and BD. ASTM recommends against galvanizing Grade BD as the high tensile strength makes it more susceptible to hydrogen embrittlement.
A193 This specification was designed for high temperature or high pressure service. The most common grades used for anchor bolts are the high strength  alloy steel grade B7 and the stainless steel grades B8 and B8M.
A320 This specification was designed for low temperature service. The most common grades used for anchor bolts are the high strength alloy steel grade L7 and the stainless steel grades B8 and B8M. Grade L7 anchor bolts require a Charpy test at -150 degrees Fahrenheit.
F2329 This ASTM specification covers hot-dip galvanizing of bolts, nuts, washers, and other threaded parts. Galvanizing was previously covered under ASTM A153 but has been more defined under F2329.