The specification is divided into three distinct grades, each serving specific industrial needs:
| 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.) | astm 307
The ASTM A307 standard is a widely recognized and widely used specification for carbon steel bolts, studs, and stud bolts. The standard outlines the requirements for material, manufacturing, and testing, ensuring that fasteners meet specific performance requirements. By following this standard, manufacturers and users can ensure the reliability and consistency of carbon steel fasteners used in various industries. The specification is divided into three distinct grades,
: 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. : The most common grade, used for general