Steel grades: SCr415
Executive Standard: JIS G4053-2003
● Features and application:
SCr415 alloy structural steel is commonly used in low-carbon alloy carburizing steel, cold plastic deformation of high, good weldability, can be cut in the annealed condition is good. SCr415 higher working speed and cross-section for small, the center of the high toughness of carburized parts, such as bushing, crank pin, piston pin, piston rings, coupling, and high working speed gears, cam shaft and the bearing rings, screw the host ship, a small motorcycle parts, turbine rings and so on.
● Chemical Composition:
Carbon C: 0.13 ~ 0.18
Si Si: 0.15 ~ 0.35
Manganese Mn: 0.60 ~ 0.90
Sulfur S: to allow the residual content ≤ 0.030
Phosphorus P: to allow the residual content ≤ 0.030
Chromium Cr: 0.90 ~ 1.20
Ni: to allow the residual content of ≤ 0.030
Copper Cu: to allow the residual content ≤ 0.030
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 735 (75)
Yield strength σs (MPa): ≥ 490 (50)
Elongation δ5 (%): ≥ 11
Reduction of area ψ (%): ≥ 45
Impact energy Akv (J): ≥ 55
Impact toughness αkv (J/cm2): ≥ 69 (7)
Hardness: ≤ 179HB
Sample size: Sample size is 15mm rough
● Heat treatment and microstructure specifications:
Standard heat treatment: quenching: the first 880 ℃, the second time 780 ~ 820 ℃, water, oil cooling; tempering 200 ℃, water, air-cooled.
● Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.
