35crmo 
 Q235A (A3) = ASTM 29M 1020 
 Executes the corresponding Standards 
 35CrMo alloy steel performance standards: GB/3077-1999 corresponding standard: JIS G4053: 2003 
 Weldability 
 According to the International Institute of Welding (IIW) formula recommended by the carbon equivalent Ceq = C +1 / 6Mn +1 / 5 (Cr + Mo + V) +1 / 15 (Ni + Cu) (%) (1) When Ceq0.60 %, the strong tendency of hard steel, weldability is poor, are more difficult to weld steel, must be taken to a higher preheat temperature and rigorous measures, select the appropriate welding materials. Been calculated, 35CrMo steel carbon equivalent value Ceq = 0.72%. Thus, poor weldability of this material, welding tend to be larger when its hard, heat-affected zone hot cracking and cold cracking tendency will be greater, especially in the quenched state welding, heat affected zone will tend to cold cracking appeared very prominent, so should select the appropriate welding materials, welding method, based on reasonable, preheating before welding to a high temperature, stringent process control measures and appropriate temperature conditions between layers in order to achieve the goal of welding products purposes. 
 Feature 
 35CrMo alloy steel, with high static strength, impact toughness and higher fatigue limit than the 40Cr high hardenability, high temperature under high 
 35CrMo 
 Creep strength and rupture strength, long-term working temperature up to 500 ℃; cold plastic deformation of the middle, poor welding. 
 Use 
 Used in high load of the important structural components, such as vehicle and engine transmission parts; turbine rotor, spindle, heavy load shaft, a large cross-section parts 
 Physical Description 
 Chemical composition 
 Carbon C: 0.32 ~ 0.40 Si Si: 0.17 ~ 0.37 Manganese Mn: 0.40 ~ 0.70 S S: to allow the residual phosphorus content ≤ 0.035 P: ≤ 0.035 to allow the residual content of chromium Cr: 0.80 ~ 1.10 Ni: to allow the residual content of copper, Cu ≤ 0.30 : to allow the residual content of ≤ 0.30 Mo Mo: 0.15 ~ 0.25 
 Mechanical Properties 
 Tensile strength σb (MPa): ≥ 985 (100) yield strength σs (MPa): ≥ 835 (85) Elongation δ5 (%): ≥ 12 Reduction of ψ (%): ≥ 45 Impact energy Akv (J ): ≥ 63 impact toughness αkv (J/cm2): ≥ 78 (8) Hardness: ≤ 229HB sample size: Sample size of 25mm rough 
 Microstructure and heat treatment specifications 
 Standard heat treatment: quenching 850 ℃, oil-cooling; tempering 550 ℃, water-cooled, oil-cooling. Heat treatment and mechanical properties: steel: 35CrMo blank sample size / mm: 25 Heat Treatment | Hardening | Heat temperature / ℃ | first quenching: 850 Heat Treatment | Hardening | Heat temperature / ℃ | second quenching: - Heat treatment | hardening | Coolant: Oil heat | Tempering | heating temperature / ℃: 550 Heat treatment | Temper | coolants: water, oil and mechanical properties | tensile strength σb / MPa | ≥: 980 mechanical properties | yield point σs / MPa | ≥: 835 Mechanical Properties | Elongation δ5 (%) | ≥: 12 mechanical properties | area shrinkage ψ (%) | ≥: 45 Mechanical Properties | Impact absorbed energy AKV / J | ≥: 63 Delivery Status hardness HBS | ≥: 229 ● Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.