Quality carbon structural steel: C20C (1.0411) Implementation of the standards: EN10263 / 2-2001 ● Features and Scope: Higher strength steel than the 15th, rarely quenching, no temper brittleness. Cold deformation on the crack-prone plastic high, usually for bending, welding performance rolling, curved edges and hammer arch machining, welding arc and contacts when welding small thickness, shape demanding or complex shape parts. Machinability cold drawn annealed or normalized relatively good state, generally used to manufacture large discontinuity toughness demanding?, ● Chemical Composition: Carbon C: 0.18 ~ 0.22 " Si Si: ≤0.10 Mn Mn: 0.70 ~ 0.90 Sulfur S: ≤0.025 Phosphorus P: ≤0.025 ● Mechanical Properties: Tensile strength σb (MPa): ≥410 (42) Yield strength σs (MPa): ≥245 (25) Elongation δ5 (%): ≥25 Reduction of area ψ (%): ≥55 Hardness: no heat, ≤156HB Sample size: Sample size 25mm ● Heat treatment and microstructure specifications: Heat treatment specifications: normalizing, 910 ℃, air cooling. Microstructure: ferrite and pearlite. ● 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. |