ASTM A193 B7 is a high-strength alloy steel material mainly used for bolts, studs, and fasteners in high temperature and high-pressure applications. It is commonly used in oil and gas, petrochemical, and power plants because of its strength and durability. The ASTM A193 B7 Equivalent Material is generally similar to EN 24 / 817M40 (UK standard) or 42CrMo4 (European standard), as they ... https://vidyafasteners.com/astm-a193-grade-b7-fasteners-manufacturer-india/