Impact energy and hardness of 35CrMnSiA high-strength alloy plate

35CrMnSiA is a high-strength alloy steel plate with high strength, high toughness and high hardenability. After heat treatment, 35CrMnSiA steel has good comprehensive mechanical properties. When the thickness is greater than 3mm, it should be preheated to 150℃ first, and heat treatment is required after welding. After conditioning, it can be used normally. 35CrMnSiA alloy steel is used to manufacture medium-speed, heavy-duty, high-strength, high-toughness parts and high-strength components. It is mostly used to manufacture various important parts with high load and high speed, such as gears, shafts, clutches, sprockets, grinding wheel shafts, bushings, bolts, nuts, etc. Welded components such as blades of high pressure blowers, valve plates and non-corrosive pipes.

Chemical composition of 35CrMnSiA high-strength alloy steel plate:
Carbon C: 0.32 to 0.39
Silicon Si: 1.10-1.40
Manganese Mn: 0.80-1.10
Sulfur S: allowable residual content ≤ 0.025
Phosphorus P: allowable residual content≤0.025
Chromium Cr: 1.10-1.40
Nickel Ni: allowable residual content ≤ 0.030
Copper Cu: allowable residual content ≤ 0.025

Tensile yield strength of 35CrMnSiA high-strength alloy steel plate:
Tensile strength σb (MPa): ≥1620(165)
Yield strength σs (MPa): ≥1275(130)
Elongation δ5 (%): ≥9
Area shrinkage ψ (%): ≥40
Impact energy Akv (J): ≥31
Impact toughness value αkv (J/cm²): ≥39(4)
Hardness: ≤241HB
Sample size: sample

35CrMnSiA high-strength alloy plate delivery status and heat treatment specifications:
(1) Quenching: the first 950℃, the second 890℃, oil cooling; tempering 230℃, air cooling, oil cooling; (2) 880℃ isothermal quenching at 280-310℃.

(2) Delivered with heat treatment (normalizing, annealing or high temperature tempering) or without heat treatment, and the delivery status should be indicated in the contract.