Overview
EN36NiCrMoV7 (also known as 46NiCrMoV7) is a low-alloy, precipitation hardening steel used for applications requiring high strength and toughness combined with good ductility. It responds rapidly to heat treatment and is relatively cost-effective, making it an ideal choice for a variety of industries.
Chemical Composition
EN36NiCrMoV7 has the following chemical composition:
Carbon: 0.09-0.15%
Silicon: 0.15-0.30%
Manganese: 0.30-0.60%
Phosphorus: 0.030% max
Sulfur: 0.030% max
Chromium: 0.90-1.10%
Nickel: 0.40-0.60%
Molybdenum: 0.08-0.12%
Vanadium: 0.08-0.12%
Heat Treatment
EN36NiCrMoV7 can be easily heat treated to obtain a wide range of microstructures and properties. Diffusion-controlled annealing is often used, and can be done in the range of 850-950°C followed by rapid cooling to obtain a bainite microstructure. The austenization temperature should be higher when higher hardness values are desired. Martensitic and bainitic conditioning treatments, or quenching and tempering processes, can also be used to obtain the desired microstructures and properties.
Mechanical Properties
EN36NiCrMoV7 is readily heat treatable and has a wide range of mechanical properties. In the annealed state it has a minimum yield strength of 730MPa and a tensile strength of 810MPa. The hardness can be varied from HRC 30 to HRC 43 depending on the heat treatment process used.
Applications
EN36NiCrMoV7 is a versatile material and thus has a wide range of applications. It is commonly used in the fabrication of fastening systems, nuts and screws, forged and/or machined components, and aerospace and other demanding applications. It can also be used in automotive components, powertrain components, motorsport parts, turbine components, and even medical devices due to its demanding strength and good ductility.
Conclusion
EN36NiCrMoV7 is an effective and cost-effective steel suitable for a vast range of industries and applications. It is an alloy steel which responds well to heat treatment, offering a wide range of properties and microstructures. Coupled with its relative affordability, this makes it an ideal choice for many applications requiring high strength and toughness combined with good ductility.
