14MoV6-3, 1.7715, 12Kh1MF – High temperature steel

14MoV6-3, 1.7715, 15 128, 12Kh1MF steel is a high alloy steel, which is known for its exceptional mechanical properties and wide range of applications. This steel grade is often used in the energy industry and other industries where high strength and resistance to temperature and chemical influences are required.

Rolled round bars with a bar diameter of 50 mm to 300 mm are on stock. Forged, rough-turned round bars with a bar diameter of 340 mm to 460 mm are on stock. Larger bar diameters on inquiry.

Composition and properties

14MoV6-3 steel is alloyed with elements such as molybdenum (Mo), vanadium (V) and chromium (Cr), which give it specific properties. Its chemical composition is as follows:
Carbon (C): 0.12–0.18 %
Silicon (Si): 0.10–0.35 %
Manganese (Mn): 0.40–0.70 %
Chromium (Cr): 0.40–0.70 %
Molybdenum (Mo): 0.25–0.35 %
Vanadium (V): 0.18–0.25 %
Phosphorus (P): max. 0.030 %
Sulphur (S): max. 0.030 %

These elements increase the strength, hardness and resistance of the steel to high temperatures and oxidation. 14MoV6-3, 1.7715 steel has the following mechanical properties:

Tensile strength: 460 – 690 MPa
Yield strength: min. 300 MPa
Ductility: min. 20 %
Impact strength: min. 27 J at 20 °C

Heat treatment

To achieve optimum properties, proper heat treatment of 14MoV6-3, 1.7715 is important. The process involves the following steps:
Annealing: Heating to a temperature of approx. 650–700 °C followed by slow cooling to reduce residual stress.
Hardening: Heating to 900–950 °C followed by rapid cooling in water or oil to increase hardness and strength.
Tempering: Heating to 650–700 °C followed by slow cooling to optimise mechanical properties and remove brittleness caused by hardening.

Use

Due to its properties, 14MoV6-3, 1.7715 material is widely used in various industries:
Energy: components for steam boilers and heat exchangers where high resistance to temperature and pressure changes is required.
Machinery: Components of turbines, compressors and other equipment where strength and wear resistance are crucial.
Chemical industry: Reactors, storage tanks and piping that must withstand corrosive substances and high temperatures.
Aerospace industry: Engine components and components exposed to high temperatures and mechanical stresses.

14MoV6-3, 1.7715 steel is an excellent choice for applications where a combination of high strength and temperature and chemical resistance is required. Its chemical composition and mechanical properties make it ideal for use in the energy, engineering, chemical and aerospace industries. In addition, proper heat treatment ensures optimum performance and a long service life for components made of this steel.