BÖHLER T670 is a corrosion-resistant steel for aerospace applications in the form of bars, wire, and forgings with diameters/thicknesses up to 305 mm in the solution-annealed condition, as well as pre-forging material of any size.
It is a martensitic, precipitation-hardenable chromium-nickel-copper-molybdenum steel with high strength and toughness.
BÖHLER T670 is primarily suitable for parts requiring corrosion resistance close to that of Cr-Ni 18-8 steels and exceeding the strength of martensitic 12% Cr steels. This steel can be processed in the solution-annealed condition and, through precipitation treatment, achieves tensile strengths of up to 1080 MPa with good ductility and strength in the transverse directions, even in large cross-sections.
Certain processing methods and operating conditions can cause stress corrosion cracking in these products.
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