Fasteners in energy applications require high‑strength BÖHLER steels with excellent fatigue and corrosion resistance. Key quality features include ultra‑clean materials, full traceability, controlled heat treatment, and rigorous testing for safe, reliable performance.
Fasteners such as bolts and nuts used in energy applications are critical safety components exposed to high loads, temperature fluctuations, and often corrosive environments such as offshore, hydrogen, or power generation systems. Material requirements focus on high tensile strength, fatigue resistance, creep performance, and resistance to stress corrosion cracking and hydrogen embrittlement. Stability of mechanical properties over long service intervals is essential to ensure safe operation and prevent failure under dynamic loading conditions.
BÖHLER high‑performance steels and alloys are specifically designed to meet these demanding requirements. Advanced quenched and tempered steels, martensitic and precipitation‑hardened stainless steels, as well as corrosion‑resistant alloy grades provide optimized combinations of strength, toughness, and environmental resistance. Produced via advanced melting technologies, BÖHLER materials offer superior cleanliness and controlled microstructure, supporting extended fatigue life. Key quality features include strict chemical composition control, certified traceability, and validated heat treatment processes. Comprehensive non‑destructive testing, mechanical testing, and dimensional inspection ensure consistent quality. BÖHLER solutions enable reliable fastening systems, improved safety margins, and long‑term performance in demanding energy applications.
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 MoreComponents for steam and gas turbines, such as blades, discs, bolts and pins.
Read MoreComponents featuring elevated high-temperature strength for use in thermal engines and power plants, such as turbine blades, turbine discs, screws, bolts, pins and shafts.
Read MoreComponents featuring elevated high temperature strength for use in thermal engines, such as turbine blades and turbine discs.
Read MoreBÖHLER W720 VMR is not a classic hot work tool steel, but an ultra-high strength maraging steel. Compared to quenched and tempered steels, the material generates its high strength not through a hardened and tempered martensitic structure with a high carbon content and secondary hardening carbides, but through the precipitation of intermetallic phases from a tough nickel martensitic matrix. BÖHLER W720 VMR corresponds to material number 1.6358 (X2NiCoMoTi18-9-5) and has proven to be ideally suited for many tool steel applications in cold and hot work (e.g., for extrusion stems) up to 450 °C.
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