35CrMoA Structural Steel Bar

 

35CrMoA is a commonly used alloy structural steel. 35CrMoA structural steel has high static strength, impact toughness and higher fatigue limit, higher hardenability than 40Cr, high creep strength and endurance strength at high temperature, long-term working temperature can reach 500℃; when cold deformed Medium plasticity, poor weldability. It is used as important structural parts that work under high loads, such as transmission parts of vehicles and engines; rotors, main shafts, heavy-load transmission shafts of steam turbine generators, large-section parts, fasteners, etc.

 

Chemical Composition:

 
C(％)Si(％)Mn(％)P(％)S(％)Cr(％)Ni(％)Cu(％)Mo(％)
0.32～0.400.617 ~ 0.370.40 ~ 0.70≤0.025≤0.0250.80～1.10≤0.030≤0.0300.15 ~ 0.25

 

Mechanical Propoerties:

 
Yield Strength
Rp0.2(MPa)		Tensile Strength
Rm(MPa)		Elongation δ5 (%): Reduction
of area ψ (%):		Impact energy
Akv (J):		Impact toughness
value αkv (J/cm2)		 Hardness
≥ 835(85) ≥ 985(100) ≥ 12≥ 45≥ 63≥ 78(8)≤ 229 HB

 

Physical Properties:

 

Temperature
(°C)		Modulus of elasticity
(GPa)		Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) andThermal conductivity
(W/m·°C)		Specific thermal capacity
(J/kg·°C)		Specific electrical resistivity
(Ω mm²/m)		Density
(kg/dm³)		Poisson’s coefficient, ν
44--  0.34- 
565598-12.3224 - 
827-3321.2  333112

 

Equivalent Grade:

 

ChinaUSAGermanyJapanFranceUKISO
StandardGradeStandardGradeStandardGradeStandardGradeStandardGradeStandardGradeStandardGrade
GB/T 307735CrMoAASTM A29/A29M4135,
4137		DIN EN 10083-334CrMo4 JISG 4105SCM435NF EN 10083-334CrMo4BS EN 10083-334CrMo4ISO 68334CrMo4

 

 

Heat treatment specification: 

 

  • quenching 850℃, oil cooling; 
  • tempering 550℃, water cooling, oil cooling.

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