EN19 Alloy Steel Forged Round Bar For Construction Use

EN19 is a high-Quality alloy steel often used in applications requiring high strength and toughness. When referring to "EN19 forged round bars," you're talking about cylindrical bars made from EN19 steel that have been shaped through a forging process. Here's a detailed description:
### EN19 Forged Round Bar Description:
**Material**:- **Grade**: EN19 is also known as SAE 4140 or AISI 4140, and it is a chromium-molybdenum alloy steel.- **Composition**: Typically contains:  - **Carbon**: 0.38% - 0.43%  - **Chromium**: 0.80% - 1.10%  - **Molybdenum**: 0.15% - 0.25%  - **Manganese**: 0.75% - 1.00%  - **Silicon**: Up to 0.35%  **Properties**:- **Tensile Strength**: Typically ranges from 700 to 850 MPa (100,000 to 120,000 psi), depending on the heat treatment process.- **Yield Strength**: Generally between 450 and 600 MPa (65,000 to 87,000 psi) when properly heat-treated.- **Hardness**: Can achieve hardness levels of 28-34 HRC (Rockwell Hardness C) in its annealed state, and up to 50 HRC after heat treatment.- **Impact Toughness**: Excellent impact toughness due to its alloying elements and forged structure.
**Applications**:- **Automotive**: Used for high-strength components like crankshafts, gear shafts, and axles.- **Engineering**: Suitable for manufacturing heavy-duty machinery parts, such as gears, connecting rods, and forgings for structural applications.- **Aerospace**: Employed in parts requiring high strength-to-weight ratios and fatigue resistance.
**Manufacturing**:- **Forging Process**: EN19 steel is heated and then forged into round bars through processes like hammering, pressing, or rolling. Forging aligns the grain structure of the steel, enhancing its mechanical properties and strength.- **Form**: Supplied as round bars, which are cylindrical sections of steel used in various machining and manufacturing processes.- **Dimensions**: Available in a range of diameters and lengths. Common diameters range from a few millimeters to several inches, depending on application requirements.- **Heat Treatment**: EN19 round bars are often heat-treated to achieve desired properties. Common heat treatments include quenching and tempering to enhance hardness and toughness.
**Surface Finish**:- **Finish**: Typically has a mill finish, which may be rough or semi-rough. Additional machining, grinding, or polishing can be applied to achieve a smooth surface finish.- **Coatings**: Generally, coatings are not required due to the inherent properties of the alloy steel, though some applications might benefit from additional protective coatings to prevent corrosion.
**Standards and Testing**:- **Standards**: Conforms to standards such as EN 19 or equivalent specifications (e.g., ASTM A322).- **Testing**: Often subjected to testing for chemical composition, mechanical properties, and dimensional accuracy. Tests may include tensile tests, hardness tests, and impact tests to ensure quality.
**Advantages**:- **High Strength**: Provides excellent strength and durability, making it suitable for high-stress applications.- **Toughness**: Offers good toughness and resistance to impact and fatigue, enhancing performance in demanding conditions.- **Versatility**: Can be used in a wide range of applications due to its favorable mechanical properties and ability to be heat treated for specific requirements.
EN19 forged round bars are widely valued in industries where high strength, toughness, and reliability are critical. Their properties make them suitable for demanding applications in automotive, engineering, and aerospace sectors.