Astm 307 Jun 2026

The ASTM A307 standard covers the requirements for carbon steel bolts, studs, and stud bolts with a diameter ranging from 1/4 to 4 inches (6 mm to 100 mm). These fasteners are commonly used in a variety of applications, including:

: The most common grade, used for general applications like light construction, timber bolts, and lag screws. It features a minimum tensile strength of 60 ksi. astm 307

| Property | Grade A | Grade B | |----------|---------|---------| | Tensile Strength | 60,000 psi (min) | 60,000–100,000 psi | | Yield Strength (approx.) | 36,000 psi (min) | No explicit requirement, but typically 36,000–55,000 psi | | Hardness (Rockwell) | B69–B100 | B69–B95 | | Elongation | 18% min (in 8 in.) | 18% min (in 8 in.) | The ASTM A307 standard covers the requirements for

| Standard | Tensile Strength | Typical Application | |----------|----------------|----------------------| | | 60 ksi min | General utility, flanges | | ASTM F1554 Gr. 36 | 58–80 ksi | Anchor bolts (better for seismic) | | SAE J429 Gr. 2 | 60 ksi min | Automotive/machinery bolts (similar but not interchangeable for spec compliance) | | ASTM A449 | 90–120 ksi | Higher strength general use | | ISO 898-1 Class 4.6 | 58–71 ksi | Metric equivalent to A307 Gr. A | | Property | Grade A | Grade B