Valves and actuators require BÖHLER steels and alloys with high strength and corrosion resistance. Key quality features include ultra-clean materials, full traceability, controlled heat treatment, and rigorous testing for reliable oil & gas and CPI performance.
Valves and actuators in the oil & gas and Chemical Process Industry (CPI) are critical components for controlling and regulating the flow of aggressive fluids under extreme pressures and temperatures. These systems are exposed to corrosive environments containing CO₂, H₂S, chlorides, and chemical media, combined with dynamic loading, pressure cycling, and thermal fluctuations. Material requirements are therefore highly demanding, focusing on high strength, excellent corrosion resistance, resistance to stress corrosion cracking, and long-term dimensional stability. In addition, materials must ensure reliable sealing performance and resistance to wear and erosion in critical contact areas.
BÖHLER high-performance steels and alloys are specifically engineered to meet these stringent requirements. Advanced stainless steels, including austenitic, duplex, and precipitation-hardened grades, as well as high-alloy and nickel-based materials, offer optimized combinations of strength, corrosion resistance, and durability. Produced using advanced melting and refining technologies, BÖHLER materials ensure exceptional cleanliness, low inclusion content, and homogeneous microstructures, enhancing reliability and service life. Key quality features include strict control of chemical composition, certified traceability, and precisely controlled heat treatment processes. Comprehensive testing, including corrosion resistance, pressure integrity, and non-destructive inspection, ensures compliance with industry standards. BÖHLER materials enable safe, efficient, and long-lasting valve and actuator solutions.
BÖHLERL718 API (UNS N07718) is a high-strength, corrosion-resistant nickel-chromium-iron-molybdenum material with excellent corrosion resistance, especially in H2S and CO2 environments. The alloy is age-hardenable due to the addition of niobium, titanium and aluminium. BÖHLER L718 API is recognised by the oil industry for its simple and cost-effective production in combination with good tensile, fatigue, creep and fracture strength and is used in a wide range of applications in this sector. BÖHLER L718 API has excellent weldability and is resistant to cracking after welding. The material can be used at high temperatures. BÖHLER L718 API is available in the NACE/API 6A CRA versions with a minimum yield strength of 120/140 ksi and also in the high-strength version with 150 ksi. All hardness grades are suitable for sour service and can be used for pressurising and pressure-controlling equipment in corrosive environments. Typical applications include packers, pumps, connectors and fasteners as well as gate valves, throttle spindles, pipework hangers and fire safe valves, but also a wide range of downhole and completion components, nuclear and surface applications.
Read MoreBÖHLER N700 is a corrosion-resistant steel in the form of bars, wire and forgings in the solution-annealed condition. It is a martensitic, precipitation-hardenable chromium-nickel-copper steel with high strength and toughness. Further increases in strength can be achieved by cold forming and subsequent precipitation hardening. These products are typically used for parts that require higher corrosion resistance than the usual 13% or 17% chromium steels and high strength up to 316 °C. However, their use is not limited to such applications. Remelting processes are used to improve steel purity and homogeneity. (ESR, PESR, VAR) Certain processing methods and operating conditions can make these products susceptible to stress corrosion cracking. For applications such as bolting where stress corrosion cracking is possible, the product should be aged for at least 4 hours at the highest temperature compatible with the strength requirements, but in no case lower than 552 °C. Typical applications for reactor construction and highly stressed pump parts, springs and ship shafts.
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