17-7PH Stainless Steel Belleville Washers

Belleville washers are unique, conical shaped washers recommended for use in problematic or critical bolting applications. Their conical shape affords a high spring rate over a short deflection to retain the proper bolting stress in a variety of conditions. The loss of a sound bolted connection can lead to fugitive emissions, cause equipment failure, or catastrophic events. Belleville washers can eliminate bolted joint failures due to a variety of causes:

• High-temperature bolt yield
• Differential thermal expansion
• Packing or gasket relaxation or creep
• Vibration
• Thermal cycling
• High cycle applications

17-7PH stainless steel is semi-austenitic and precipitation hardened. It exhibits high strength and hardness, corrosion resistance, and excellent fatigue properties, and is suitable for cryogenic service. 17-7PH Belleville Washers are commonly used on stainless steel grades of bolting including ASTM A193 and A320 Grade B8 and B8M, classes 1 and 2 (strain hardened).