Tubular products, flanges, and fittings require BÖHLER steels 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.
Tubular products, flanges, and fittings used in the oil & gas and Chemical Process Industry (CPI) are critical components for fluid transport and pressure containment under harsh operating conditions. These components are exposed to high pressures, temperature variations, and aggressive media such as CO₂, H₂S, chlorides, and chemical process fluids. Material requirements are therefore focused on high strength, excellent corrosion resistance, and resistance to stress corrosion cracking, hydrogen-induced cracking, and fatigue under cyclic loading. Reliable weldability and dimensional stability are also essential to ensure leak-tight and safe system performance over long service lifetimes.
BÖHLER high-performance steels and alloys are specifically engineered to meet these demanding requirements. Advanced low-alloy and quenched and tempered steels, as well as corrosion-resistant stainless steels including austenitic, duplex, and precipitation-hardened grades, provide an optimized balance of toughness, strength, and environmental resistance. Produced using advanced melting and refining technologies, BÖHLER materials ensure superior cleanliness, low inclusion content, and homogeneous microstructures, enhancing reliability and service life. Key quality features include strict chemical composition control, certified traceability, and precisely controlled heat treatment processes. Comprehensive testing, including corrosion evaluation, mechanical verification, and non-destructive inspection, ensures compliance with industry standards. BÖHLER materials enable safe, durable, and high-performance tubular solutions.
BÖHLER 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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