Quality carbon structural steel: C30 (1.0528) Implementation of the standards: EN 10083 / 2-1991 ● Features and Scope: Strength and hardenability of steel is higher than the 30th, weldability moderate, cold deformation, plastic medium, good machinability, usually in the normalized condition used for the manufacture of bolts, nuts, leverage and working under high stress small parts. ● Chemical Composition: Carbon C: 0.27 ~ 0.34 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): ≥540 (55) Yield strength σs (MPa): ≥315 (32) Elongation δ5 (%): ≥20 Reduction of ψ (%): ≥45 Impact energy Akv (J): ≥63 Impact toughness αkv (J / cm2): ≥78 (8) Hardness: no heat, ≤217HB; annealed steel, ≤187HB Sample size: Sample size is 25mm ● Heat treatment and microstructure specifications: Heat treatment specifications: normalizing, 880 ℃; quenching, 860 ℃; 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. |