45# Alloy is a medium-carbon steel offering high strength, durability, and excellent machinability. This versatile material is widely used in applications requiring a combination of toughness and wear resistance, with balanced mechanical properties ideal for various structural and engineering applications.

• Carbon (C): 0.42-0.50% - Provides increased strength and hardness while maintaining reasonable ductility.
• Manganese (Mn): 0.60-0.90% - Enhances hardness and tensile strength while improving toughness.
• Silicon (Si): ≤0.35% - Improves mechanical properties and surface finish through deoxidization.
• Phosphorus (P): ≤0.035% - Maintains toughness by preventing brittleness.
• Sulfur (S): ≤0.035% - Enhances machinability and strength by reducing inclusions.

• Tensile Strength: 600-850 MPa - Withstands significant pulling or stretching forces.
• Yield Strength: ≥400 MPa - Endures substantial stress without permanent deformation.
• Elongation: ≥15% - Provides good ductility for fabrication processes.
• Density: 7.85 g/cm³ - Offers optimal strength-to-weight ratio.
• Hardness: HB 170-229 - Delivers excellent wear resistance for high-stress applications.

• Machinery Parts: Gears, shafts, and high-strength components.
• Automotive Components: Crankshafts, camshafts, and engine parts.
• Structural Elements: Beams, columns, and frames in construction.
• Tools and Dies: Wear-resistant tools and shaping dies.
• General Engineering: Various applications requiring strength and machinability.

45# Alloy medium-carbon steel delivers an optimal balance of high tensile strength, excellent machinability, and superior wear resistance. Its carefully engineered chemical composition and mechanical properties make it ideal for demanding applications across machinery manufacturing, automotive production, structural engineering, and tool fabrication. This reliable material offers consistent performance and durability for diverse industrial requirements.