Astm A307 Anchor Bolts Specifications ((free)) -
For new construction where ductility and seismic performance matter, specify ASTM F1554 Grade 36 instead of A307.
| Element | Maximum Limit | | :--- | :--- | | | 0.30% (Typically) - Varies by diameter/manufacturer. | | Phosphorus (P) | 0.040% Max | | Sulfur (S) | 0.050% Max |
The specification is divided into grades based on mechanical properties and intended use: astm a307 anchor bolts specifications
The standard is distinct in that it does not dictate specific geometry for anchor bolts (such as hooks or threading lengths); rather, it ensures the material quality and strength. Specific geometry for anchor bolts is typically governed by supplementary standards (such as ASTM F1554 for anchor bolts specifically, though A307 rods are frequently used for this purpose in lighter applications).
To ensure compliance with ASTM A307, the following tests are typically performed: For new construction where ductility and seismic performance
| Property | Requirement | |----------|--------------| | Tensile Strength | 60 ksi (415 MPa) min | | Yield Strength (min) | 36 ksi (248 MPa) typical (not mandatory by A307 but common for Grade A) | | Elongation (in 2 in.) | 18% min | | Reduction of Area | 35% min |
The defining characteristics of ASTM A307 bolts are their mechanical properties, specifically tensile strength and ductility. Specific geometry for anchor bolts is typically governed
ASTM A307 is the standard specification for carbon steel bolts, studs, and threaded rods, commonly used for anchor bolts in non-critical, low-stress applications (e.g., structural bolting, flanged joints, and anchoring equipment to concrete).
ASTM A307 remains a foundational standard in the fastener industry. Its primary role is to define the material properties of low-to-medium carbon steel fasteners. For anchor bolt applications, Grade A provides a cost-effective solution for low-stress environments due to its excellent ductility and ease of galvanizing. However, due to the obsolescence of Grade C and the rise of the ASTM F1554 standard for anchoring, engineers should exercise caution when specifying A307 for structural anchor bolts, favoring F1554 for structural anchorage and reserving A307 for general hardware and threaded rods.