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Chemical composition of 20NiCrMo2H
The chemical composition, referenced standards, and mechanical properties of 20NiCrMo2H are of great significance in the fields of precision machinery manufacturing and heavy equipment components.
20NiCrMo2H, a low-alloy carburizing steel, is widely used in the machining of gears, drive shafts, and other components due to its excellent wear resistance and high strength. It balances deep hardening capability with toughness, making it suitable for complex working conditions involving alternating loads and long-term operation, thus gaining popularity in the machinery manufacturing industry.
20NiCrMo2H is a low-alloy steel containing nickel, chromium, and molybdenum, belonging to the category of carburizable and hardenable steels. Its "Ni" enhances toughness, and together with "Cr," improves wear resistance and surface hardness, while "Mo" strengthens tempering stability and high-temperature strength. After carburizing, the surface hardness can reach HRC58-62, while maintaining the toughness of the core, making it suitable for manufacturing parts subjected to impact and wear.
The chemical composition of 20NiCrMo2H ranges as follows: C 0.17%-0.23%, Si ≤0.40%, Mn 0.40%-0.70%, Ni 1.50%-1.80%, Cr 0.40%-0.70%, Mo 0.20%-0.40%, P ≤0.025%, S ≤0.025%. This elemental ratio gives the material good carburizability and a uniform hardened layer.
After appropriate heat treatment, 20NiCrMo2H steel achieves a tensile strength of 900-1100 MPa, an impact toughness of ≥40 J in the core, and an elongation of approximately 10%-14%. In the carburized and quenched state, the surface layer exhibits extremely high hardness and wear resistance, while maintaining sufficient internal toughness to prevent fracture due to excessive brittleness.
20NiCrMo2H steel has a density of approximately 7.85 g/cm³, moderate thermal conductivity, and is suitable for uniform carburizing and tempering processes. Its average resistivity is 0.2 μΩ·m, and its coefficient of thermal expansion is approximately 11.5 × 10⁻⁶/K in the range of 20°C to 100°C, contributing to good dimensional stability.
20NiCrMo2H steel is widely used in the manufacture of gears, shafts, camshafts, racks, and aerospace components for automobiles and engineering machinery.
20NiCrMo2H, a low-alloy carburizing steel, is widely used in the machining of gears, drive shafts, and other components due to its excellent wear resistance and high strength. It balances deep hardening capability with toughness, making it suitable for complex working conditions involving alternating loads and long-term operation, thus gaining popularity in the machinery manufacturing industry.
20NiCrMo2H is a low-alloy steel containing nickel, chromium, and molybdenum, belonging to the category of carburizable and hardenable steels. Its "Ni" enhances toughness, and together with "Cr," improves wear resistance and surface hardness, while "Mo" strengthens tempering stability and high-temperature strength. After carburizing, the surface hardness can reach HRC58-62, while maintaining the toughness of the core, making it suitable for manufacturing parts subjected to impact and wear.
The chemical composition of 20NiCrMo2H ranges as follows: C 0.17%-0.23%, Si ≤0.40%, Mn 0.40%-0.70%, Ni 1.50%-1.80%, Cr 0.40%-0.70%, Mo 0.20%-0.40%, P ≤0.025%, S ≤0.025%. This elemental ratio gives the material good carburizability and a uniform hardened layer.
After appropriate heat treatment, 20NiCrMo2H steel achieves a tensile strength of 900-1100 MPa, an impact toughness of ≥40 J in the core, and an elongation of approximately 10%-14%. In the carburized and quenched state, the surface layer exhibits extremely high hardness and wear resistance, while maintaining sufficient internal toughness to prevent fracture due to excessive brittleness.
20NiCrMo2H steel has a density of approximately 7.85 g/cm³, moderate thermal conductivity, and is suitable for uniform carburizing and tempering processes. Its average resistivity is 0.2 μΩ·m, and its coefficient of thermal expansion is approximately 11.5 × 10⁻⁶/K in the range of 20°C to 100°C, contributing to good dimensional stability.
20NiCrMo2H steel is widely used in the manufacture of gears, shafts, camshafts, racks, and aerospace components for automobiles and engineering machinery.
