35Cr alloy structural steel

   35cr welding process
  35Cr, alloy structural steel. Unified digital code: A20352
   Chemical composition
Standard: GB / T 3077-1988

[] Chemical composition (mass fraction) (%)

  Carbon C: 0.32 ~ 0.39

  Si Si: 0.17 ~ 0.37

  Manganese Mn: 0.50 ~ 0.80

  Sulfur S: to allow the residual content of ≤ 0.035

Phosphorus P: allow the residual content ≤ 0.035

Chromium Cr: 0.80 ~ 1.10

      Ni: to allow the residual content of ≤ 0.030

  Copper Cu: to allow the residual content of ≤ 0.30

[Mechanical properties]

    Blank sample size (mm): 25

Heat treatment: the first quenching temperature (℃): 860; Coolant: Oil the second quenching temperature (℃): - tempering heating temperature (℃): 500; coolant: water, oil

     Tensile strength σb (MPa): ≥ 930 (95)

  Yield strength σs (MPa): ≥ 735 (75)

Elongation δ5 (%): ≥ 11

  Reduction of area ψ (%): ≥ 45

Impact energy Akv (J): ≥ 47

Impact toughness αkv (J/cm2): ≥ 59 (6)

  Brinell hardness (HBS100/3000)

     (Annealing or tempering condition): ≦ 207

   Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.

  [Main features]

This steel and 30Cr steel with high strength and toughness are carbon alloy quenched and tempered steel, the ultimate strength of grade 35 steel than the corresponding 20%, slightly higher hardenability than 30Cr, and 30Cr performance and other similar processes.

[Application Examples]

For the manufacture of gears, shafts, rollers, bolts and other important conditioning parts, use basically the same with 30Cr.