JIS G4053 SCM435 Alloy Steel- SCALE STEEL.

SCM435 has high static strength, impact toughness and high fatigue limit, higher hardenability than 40Cr, high creep strength and durable strength at high temperature, long-term working temperature can reach 500℃;  [SCALE STEEL]Cold deformation plastic medium, poor weldability.  Important structural parts used for working under high load, such as transmission parts of vehicles and engines;  Turbine generator rotor, spindle, heavy load transmission shaft, large section parts.  
 
 
Species  
Alloy Structural Steel: SCM435  
Implementation Standard: JIS G4053-2008  
 
Chemical Composition of SCM435  
C: 0.33 ~ 0.38 Si: 0.15 ~ 0.35  
Manganese Mn: 0.60 ~ 0.90  
Sulfur S: Allowable [SCALE STEEL]residual content ≤0.030  
Phosphorus P: Allowable residual content ≤0.030  
Cr: 0.90 ~ 1.20  
Nickel Ni: Permissible residual content ≤0.25  
Cu Cu: Permissible residual content ≤0.30  
Mo: 0.15 ~ 0.30  
 
SCM435 Standard  
SCM435 standard :SCM435 [SCALE STEEL]is the Japanese standard (JIS G4053-2008) steel, the domestic corresponding steel 35CrMo  
 
SCM435 Hardness  
The hardness of SCM435 is HRC36 ~ 43, HB269 ~ 341  
 
Mechanical Properties of SCM435 
Tensile Strength (MPa) : ≥985(100)  
Yield Strength σs (MPa) : ≥835(85)  
Elongation δ5 (%) : ≥12  
Section Shrinkage rate ψ (%) : ≥45  
Impact Energy Akv (J) : ≥63  
Impact Toughness αkv (J/cm²)  A: 78 (8) or  
Hardness: 229 hb or less  
Sample Size: [SCALE STEEL]sample blank size is 25mm  
 
Heat Treatment Specification  
Heat Treatment Specification: quenching 850℃, oil cooling;  Tempering 550℃, water cooling, oil cooling.  
Delivery Status: heat treatment (normalizing, annealing or high temperature tempering) or no heat treatment, delivery [SCALE STEEL]status should be indicated in the contract.  Annealing no.1 "annealing at 760±10℃, furnace cooling to 400℃ air cooling.  
HB220-230  
860±10℃ normalize, air cooling out of the oven.  
Quenching water or oil (depending on the complexity of product type), 680-700 degrees tempering.  HB<217  
Quenching oil at 840±10℃ and then tempering at 470 ℃.  HRC41-45  
Quenching oil at 840±10℃ and then tempering at 480 ℃.  HRC35-45  
Tempering +tempering No.8 quenching oil at 850℃ and tempering at 510 ℃.  HRC38-42  
Tempering +tempering No.9 quenching oil at 850℃ and then tempering at 500 ℃.  HRC40-43  
Tempering +tempering [SCALE STEEL]No.10 quenching oil at 850℃ and tempering at 510℃.  HRC36-42  
Quenching oil at 850℃ and then tempering at 560℃.  HRC32-36  
Oil quenching at 860℃ and tempering at 390 ℃.  HRC48-52