Quenched and tempered steels offer high yield strengths with good toughness and are used for structural parts in mechanical engineering and toolmaking. Nitriding steels are heat-treatable steels with higher contents of Chromium, Molybdenum, Vanadium and also Aluminium and are particularly suitable for low-distortion surface hardening using nitriding processes. This significantly increases wear resistance and fatigue strength.
Quenched and tempered steels are low-alloy steels that achieve high tensile and fatigue strength with good toughness through hardening and tempering.
The different alloy contents of carbon, chromium, manganese, molybdenum and nickel, sometimes also vanadium, are very precisely matched to the respective application and have a particular influence on larger cross-sections. The weldability of these steels is limited.
Quenched and tempered steels are used for dynamically stressed parts in mechanical engineering and toolmaking, e.g. shafts and crankshafts, bolts, screws, axles and structural parts.
Nitriding steels are quenched and tempered steels with higher proportions of Cr, Mo, V and sometimes also Al. These are particularly suitable for low-distortion surface hardening by nitriding, which significantly increases wear resistance and fatigue strength.
BÖHLER V118S1 is a premium aircraft-quality, low-alloy Ni-Cr-Mo steel in the form of bars, forgings and forging stock requiring high tensile and toughness values, particular in large cross sections in the hardened and tempered condition. The molybdenum addition prevents the steel from being susceptible to temper brittleness. These products have been used typically for parts requiring a through-hardening capability up to 6 inches (152,4 mm) in nominal thickness at time of heat treatment but usage is not limited to such applications.
Read MoreBÖHLER V132 is a premium aircraft-quality, low-alloy Ni-Cr-Mo steel in the form of bars, forgings and forging stock requiring high tensile and toughness values, particular in large cross sections in the hardened and tempered condition. These products have been used typically for parts requiring a through-hardening capability up to 3.5 inches (89 mm) in nominal thickness at time of heat treatment but usage is not limited to such applications. E.g. highly stressed components and parts for the aircraft industry, Tracks, helicopter shafts, bolts and screws.
Read MoreBÖHLER V180 VMR is a high-quality, low-alloy Ni-Cr-Mo-V steel with a high silicon and vanadium content, available in bars and forgings for components with a nominal cross-sectional thickness of up to 3.5 inches (89 mm) that require the highest strength and toughness values, especially for large cross-sections in the quenched and tempered condition. This steel is typically used for parts that require a through-hardening steel with a minimum hardness of 53 HRC and can be used to produce finished parts that must meet the most stringent testing standards. Due to the higher Si and V content of BÖHLER V180 VMR, this high-strength steel offers improved mechanical and fatigue properties compared to the standard 300M grade and is used for mechanically highly stressed parts with high fatigue loads, such as torsion bars, gears, and transmission shafts, primarily in racing and automotive engineering, but also in mechanical engineering. The dual vacuum melting process, using vacuum induction melting (VIM) and subsequent vacuum arc remelting (VAR), ensures a high degree of purity and homogeneity and also enhances the fatigue properties of the manufactured parts.
Read MoreBÖHLER V354 is an alloyed Cr-Mo-V quenched and tempered steel for high strength and high temperature requirements, good weldability and suitable for nitriding. Insensitive to tempering embrittlement due to Mo content. Mainly for components in the aerospace industry to be welded and nitrided with high quenched and tempered strength, at operating temperatures from -75° C to 500° C.
Read MoreBÖHLER V358 in the British Standard Aerospace Series is a 3% Cr-Mo-V nitriding steel offering a tensile strength of 1,320-1,470 MPa, combined with excellent hardenability for high core strength and develops a hard wear resistant case after surface treatment. The alloy is produced by vacuum arc remelting. (VAR) Typical applications are gear shafts and crankshafts with maximum diameter of 70mm for the aircraft industry and automtovie components.
Read MoreBÖHLER V361 is a 3% Cr-Mo-V nitriding low-alloy steel of premium aircraft-quality, low-alloy steel offering a tensile strength of up to over 1350MPa in the form of bars, forgings, and forging stock. Due to the optimized production route via VIM-melting and VAR-remelting, the steel offers high impact strength and fatigue limit. It may be nitrided in the heat treated condition to obtain a wear resistant surface. It is used typically for nitrided parts such as bearings, operating under heavy loads and high speeds at moderate temperatures, and requiring highest surface hardness, high core toughness, and less distortion than parts made from case hardening steel, but usage is not limited to such applications.
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