How to check the mechanical properties of A29 4140?
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How to check the mechanical properties of A29 4140? I can only see the chemical composition; where can I find information on mechanical properties?
What are the requirements for heat treatment of A29 4140?
Chemical composition: Carbon C: 0.38–0.43; Silicon Si: 0.15–0.35; Manganese Mn: 0.75–1.00; Sulfur S: allowable residual content ≤ 0.040; Phosphorus P: allowable residual content ≤ 0.030; Chromium Cr: 0.80–1.10; Nickel Ni: allowable residual content ≤ 0.030; Copper Cu: allowable residual content ≤ 0.030; Molybdenum Mo: 0.15–0.25. Mechanical properties: Tensile strength σb (MPa): ≥1080(110); Yield strength σs (MPa): ≥930(95); Elongation δ5 (%): ≥12; Reduction of area ψ (%): ≥45; Impact energy Akv (J): ≥63; Impact toughness value αkv (J/cm2): ≥78(8). Hardness: ≤217 HB. Sample size: The dimension of the raw sample is 25 mm. Heat treatment specifications and microstructure: Heat treatment specifications: Quenching at 850°C, followed by oil cooling; Tempering at 560°C, with water or oil cooling. Microstructure: tempered sorbite.