astm a193 b7 bolt

add to cart The ASTM A193 B7 Bolt represents a benchmark in high-strength fastening technology, engineered for demanding industrial applications where reliability and performance are non-negotiable. eptional service in critical environments. Material & Mechanical Properties This bolt is manufactured from chromium-molybdenum alloy steel (AISI 4140/4142), quenched and tempered to achieve its characteristic high-strength properties. The ASTM A193 B7 specification mandates a minimum tensile strength of 125 ksi (862 MPa) and a minimum yield strength of 105 ksi (724 MPa) for diameters up to 2-1/2 inches. With a hardness range of 235-331 HB, this B7 bolt provides the mechanical robustness required for high-pressure and high-temperature service conditions up to 450°C (840°F). The API 20E BSL 2 certification signifies compliance with stringent technical, quality, and qualification requirements for bolting used in the petroleum and natural gas industries. BSL-2 represents an intermediate level of quality assurance, with rigorous material traceability, manufacturing process control, and documentation standards that exceed general commercial requirements. Surface Treatment – Electric Zinc Coating The electric zinc coating provides dual-action corrosion protection: a barrier layer that isolates the steel from moisture and contaminants, and a sacrificial layer that corrodes preferentially to protect the base material. This coating process, performed in accordance with ISO 4042 standards for electroplated fasteners, enhances corrosion resistance while maintaining critical thread tolerances. Post-plating heat treatment is applied to mitigate the risk of hydrogen embrittlement, ensuring the bolt maintains its full mechanical integrity. Applications The ASTM A193 B7 Bolt is the industry standard for bolting carbon steel flanges and pressure-containing equipment. Key application areas include: - Oil & Gas Industry: Wellhead equipment, pipeline flanges, and offshore drilling components - Petrochemical Plants: High-temperature/high-pressure process piping systems - Power Generation: Steam systems and turbine connections - Pressure Vessels & Valves: Critical bolting for pressure-retaining joints - General Industrial: Heavy machinery, structural connections, and high-stress fastening applications For optimal joint performance, this bolt should be paired with ASTM A194 Grade 2H heavy hex nuts, ensuring matched strength and load-bearing capacity. Why Choose This Product ? This -manufactured ASTM A193 B7 Bolt delivers the perfect balance of strength, durability, and corrosion protection. The API 20E BSL 2 certification provides independent assurance of quality and traceability, making it the preferred choice for engineers and procurement professionals seeking reliable bolting solutions for critical service applications.