The mechanical properties of GB 20CrMnTi GB/T 3077 metals determine the range of usefulness of a material and establish the service life that can be expected. Mechanical properties are also used to help classify and identify material.
|Reduction in cross section on fracture
|As-Heat-Treated Condition||Brinell hardness (HBW)|
|912 (≥)||863 (≥)||23||33||44||Solution and Aging, Annealing, Ausaging, Q+T,etc||212|
|Modulus of elasticity
|Mean coefficient of thermal expansion 10-6/(°C)
between 20(°C) and
|Specific thermal capacity
|Specific electrical resistivity
|Poisson’s coefficient, ν|
Heat treatment Related
Slowly heated to 790-810 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. Different annealing ways will get different hardness.The 20CrMnTi Gearing steel will get Hardness MAX 248 HB （Brinell hardness）.
Heated slowly to 788°C, Then put in salt-bath furnace keep 1191 ℃to 1204 ℃。quenching by oil get 60 to 66 HRc hardness. High temperature tempering: 650-700℃，cool in air, get hardness 22 to 30HRC. Low temperature tempering: 150-200 ℃， Cool in ari, get 61-66HRC hardness.
GB 20CrMnTi steel can hot worked at 205 to 538°C, 20CrMnTi Bearing/Gearing steel can be cold worked using conventional techniques in the annealed or normalized conditions.