Chemical composition and mechanical properties of 20CrMnTi carburized steel

Introduction of 20CrMnTi steel plate:
20CrMnTi is a carburizing steel, which is usually a low-carbon steel with a carbon content of 0.17%-0.24%. It is often used in automobiles to manufacture transmission gears. It is a Cr Mn Ti medium hardenability carburizing steel. 20CrMnTi steel has good workability, small deformation, and good fatigue resistance. The main uses are: used for shafts, piston parts and various special parts of automobiles and airplanes.

Chemical composition of 20CrMnTi carburized steel:
Carbon C: 0.17-0.23, Silicon Si: 0.17-0.37, Manganese Mn: 0.80-1.10, Chromium Cr: 1.00-1.30,
Sulfur S: Allowable residual content≤0.035, Phosphorus P: Allowable residual content≤0.035, Nickel Ni: Allowable residual content≤0.030, Copper Cu: Allowable residual content ≤ 0.030, Titanium Ti: 0.04-0.10

Mechanical properties of 20CrMnTi carburized steel:
Tensile strength σb (MPa): ≥1080(110)
Yield strength σs (MPa): ≥835(85)
Elongation δ5 (%):≥10
Area shrinkage ψ (%): ≥45
Impact energy Akv (J):≥55
Impact toughness αkv (J/cm2): ≥69(7)
Hardness:≤217HB
Sample size: sample blank size is 15mm

20CrMnTi steel density: 7.8×10kg/m3
Elastic modulus: 207GPa
Poisson's ratio: 0.25
Thermal conductivity: 1.26×10-5(1/℃)

Characteristics and scope of application of 20CrMnTi carburized steel:
It is a carburized steel with good performance, with high hardenability. After carburizing and quenching, it has a hard and wear-resistant surface and a tough core. It has high low-temperature impact toughness, medium weldability, and good machinability after normalizing. It is used to manufacture important parts with a cross-section <30mm that are subject to high speed, medium or heavy load, impact and friction, such as gears, ring gears, gear shaft crossheads, etc. It is a substitute steel for 18CrMnTi, widely used as carburized parts, in the automobile and tractor industries, it is used for important carburized parts with a section below 30mm, high speed, medium or heavy load and impact and friction, such as gears, shafts, and ring gears, etc.