Quality carbon structural steel: C45 (1.0503)
Implementation of the standards: EN 10083 / 2-1991
● Features and Scope:
Is a kind of high strength carbon quality steel, due to poor hardenability, generally normalizing the status of use, high mechanical performance requirements, the use of quenched and tempered. Moderate cold plastic deformation, annealing and normalizing cutting nature better than tune. Higher strength requirements for the manufacture of parts, such as gears, shafts, piston pins and discontinuity great machining parts, forgings, stampings and bolts, nuts, pipe connector
● Chemical Composition:
Carbon C: 0.42 ~ 0.50
Si Si: ≤0.40
Mn Mn: 0.50 ~ 0.80
Sulfur S: ≤0.045
Phosphorus P: ≤0.045
Chromium Cr: ≤0.40
Ni Ni: ≤0.40
Mo Mo: ≤0.10
● Mechanical Properties:
Tensile strength σb (MPa): ≥600 (61)
Yield strength σs (MPa): ≥355 (36)
Elongation δ5 (%): ≥16
Reduction of area ψ (%): ≥40
Impact energy Akv (J): ≥39
Impact toughness αkv (J / cm2): ≥49 (5)
Hardness: no heat, ≤229HB; annealed steel, ≤197HB
Sample size: Sample size is 25mm
● Heat treatment and microstructure specifications:
Heat treatment specifications: normalizing, 850 ℃; quenching, 840 ℃; tempering, 600 ℃.
● Delivery status: to heat or no heat treatment (annealing, normalizing or tempering) state delivery. Require heat treatment delivery should be specified in the contract, no heat treatment is not indicated by delivery.