20CrMnTiH execution standard GB/T 5216-2004
Number code A26202
20CrMnTiH gear steel is used to manufacture important parts such as gears, ring gears, gear shafts, cross heads, etc. that can withstand high-speed heavy loads, impacts, and friction with a cross-sectional area of less than 30mm.
Characteristics and Scope of Application
It is a high-performance carburizing steel 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, moderate weldability, and good machinability after normalizing. Used for manufacturing important parts with a cross-section<30mm that can withstand high-speed, medium or heavy loads, impacts and friction, such as gears, ring gears, gear shaft cross heads, etc. It is a substitute steel for 18CrMnTi, widely used as carburizing parts in automobiles Tractors are used in the industrial sector with a cross-section of less than 30mm to withstand high speeds Medium or heavy load and impact Friction is an important carburizing component, such as gears Axis Ring gear Gear shaft The main shaft of sliding bearings Cross head Claw clutch Worm gear, etc
Chemical composition of 20CrMnTiH
Carbon C: 0.17-0.23
Silicon Si: 0.17-0.37
Manganese Mn: 0.80-1.15
Sulfur S: ≤ 0.035
Phosphorus P: ≤ 0.035
Chromium Cr: 1.00-1.35
Nickel Ni: ≤ 0.030
Copper Cu: ≤ 0.030
Titanium Ti: 0.04~0.10
Mechanical properties of 20CrMnTiH
Tensile strength σ b (MPa): ≥ 1080 (110)
Yield strength σ s (MPa): ≥ 835 (85)
Elongation rate δ 5 (%): ≥ 10
Shrinkage rate of cross-section (%): ≥ 45
Impact energy Akv (J): ≥ 55
Impact toughness value α kv (J/cm2): ≥ 69 (7)
Hardness: ≤ 217HB
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