Good translation Metal Products (Shanghai) alloy structural steel companies (domestic alloy steel / alloy steel imports) 35CrMo alloy steel / 35CrMo steel / 35CrMo steel bar / 35CrMo steel coil / 35CrMo steel / 35CrMo steel / 35CrMo steel (good Translation Metal Products (Shanghai) Co., Ltd.) 
 35CrMo alloy steel 
 Executive Standard: GB/3077-1999 
 Corresponds to the standard: JIS G4053: 2003 
 Weldability 
 (1) The obvious tendency of hard steel, good weldability, welding without preheating, welding can be applied directly; (2) When Ceq = 0.40 ~ 0.60%, the tendency became clear the hard steel, weldability, yet may be, must be taken when welding proper warm-up before welding, slow cooling after welding and other technological measures to control the welding heat input; (3) When Ceq> 0.60%, the strong tendency of hard steel, weldability is poor, are more difficult to weld steels, must take a higher preheat temperature and rigorous measures, select the appropriate soldering materials. The 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 of the cold cracking tendency will be appeared very prominent, so should select the appropriate welding materials, welding methods, based on reasonable, to take a higher preheat temperature before welding, strict process control measures and appropriate conditions of temperature between layers in order to achieve the goal of welding products the purpose. 
 Feature 
 35CrMo alloy steel, has a high static strength, impact toughness and high fatigue limit, compared with 40Cr high hardenability, high temperature under high 
 Strength and creep rupture strength, long-term operating 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 loads of drive shaft, a large cross-section parts 
 Chemical composition 
 Carbon C: 0.32 ~ 0.40 
 Si Si: 0.17 ~ 0.37 
 Manganese Mn: 0.40 ~ 0.70 
 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 ≤ 0.030 
 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 area ψ (%): ≥ 45 
 Impact energy Akv (J): ≥ 63 
 Impact toughness αkv (J/cm2): ≥ 78 (8) 
 Hardness: ≤ 229HB 
 Sample size: Sample size is 25mm rough 
 Standard heat treatment and microstructure 
 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 | heating temperature / ℃ | first quenching: 850 
 Heat treatment | hardening | heating temperature / ℃ | second quenching: - 
 Heat treatment | hardening | Coolant: Oil 
 Heat treatment | Tempering | heating temperature / ℃: 550 
 Heat treatment | Tempering | coolant: water, oil 
 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. 
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