The evolution of 15CrMo5 Steel grade: From development to practical uses

Specification:
– Steel grade: 15CrMo5
– Material type: alloy steel
– Alloying elements: chromium, molybdenum
– Standard: EN 10028-2
– Chemical composition: carbon (C) – 0.12-0.18%, silicon (Si) – 0.15-0.35%, manganese (Mn) – 0.40-0.60%, phosphorus (P) – ≤0.035%, sulfur (S) – ≤0.035%, chromium (Cr) – 0.80-1.15%, molybdenum (Mo) – 0.25-0.35%
– Mechanical properties: yield strength – ≥340 MPa, tensile strength – 450-590 MPa, elongation – ≥22%, impact energy – ≥27 J at -20°C.

The evolution of the 15CrMo5 steel grade involves various stages, starting from its development to its practical applications.

1. Development:
– The steel grade 15CrMo5 was developed as an alloy steel with enhanced mechanical properties and resistance to high temperatures and pressure.
– Extensive research and experimentation were conducted to determine the optimal chemical composition and heat treatment processes to achieve the desired properties.
– The main alloying elements, chromium and molybdenum, were carefully chosen to improve the material’s strength, toughness, and heat resistance.

2. Chemical Composition:
– The chemical composition of 15CrMo5 steel grade is designed to meet specific requirements for its intended applications.
– The percentage of carbon, silicon, manganese, phosphorus, and sulfur is controlled within specified limits to ensure proper alloy formation and desired properties.
– Chromium content improves the steel’s corrosion resistance, hardenability, and wear resistance.
– Molybdenum enhances the steel’s high-temperature strength, creep resistance, and overall mechanical properties.
– Careful control of the chemical composition ensures consistent and reliable performance of the material.

3. Mechanical Properties:
– The mechanical properties of 15CrMo5 steel grade are crucial for its practical applications.
– The yield strength of the material is at least 340 MPa, indicating its ability to withstand significant loads and pressures without permanent deformation.
– The tensile strength ranges from 450 to 590 MPa, indicating the material’s ability to resist breaking under tension.
– The elongation, which represents the material’s ductility, is not less than 22%, ensuring it can undergo deformation without fracturing.
– The impact energy of at least 27 J at -20°C demonstrates the material’s resistance to brittle fracture even at low temperatures.

4. Practical Uses:
– The 15CrMo5 steel grade finds applications in various industries where high strength, heat resistance, and corrosion resistance are required.
– Common applications include pressure vessels, boilers, pipelines, and structural components in power plants, refineries, and petrochemical plants.
– The excellent mechanical properties and resistance to high temperatures make it suitable for applications in the nuclear and aerospace industries.
– The controlled chemical composition and reliable mechanical properties of 15CrMo5 steel grade ensure its performance and longevity in demanding environments.

In conclusion, the evolution of the 15CrMo5 steel grade involves careful development, specifying its chemical composition, and optimizing its mechanical properties. This alloy steel finds practical uses in various industries due to its exceptional strength, heat resistance, and corrosion resistance capabilities.
15CrMo5 Steel grade
1698331844

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