Alloy Steel Bars
Raj Metals is a premier manufacturer and supplier of Alloy Steel Bars, engineered to deliver superior strength, toughness, and wear resistance in the most demanding industrial environments. Our alloy steel portfolio includes critical high-performance grades such as AISI 4130, 4140, 4340, 8620, and 52100, as well as widely utilized specifications like EN19, EN24, 16MnCr5, and 20MnCr5, offering exceptional mechanical properties through controlled heat treatment processes. Whether you require Hot Rolled black bars for structural fabrication or Cold Drawn Bright bars for CNC machining, our products undergo rigorous ultrasonic and surface integrity testing to ensure uniform grain structure and precise dimensional tolerances. Designed to excel under high-torque and high-stress conditions, our bars serve as the backbone for heavy-duty applications in automotive transmissions, aerospace fasteners, power generation, and critical oil & gas infrastructure.
To fulfill highly specific engineering criteria, we supply these alloy steel bars in specialized heat-treated conditions, including Annealed, Normalized, and Quenched & Tempered (Q&T) to achieve your target hardness and tensile properties. Our processing facility offers a variety of value-added options, including precision centerless grinding, cut-to-length sawing, and peeling, which minimizes machining allowances and reduces tool wear for your production lines. Adhering strictly to international compliance standards such as ASTM, EN, DIN, and BS, Raj Metals ensures total batch traceability and supplies comprehensive Material Test Certificates (MTC) to guarantee uncompromised safety and reliability in high-fatigue applications.
Key Features
Product Specifications
| Parameter | Technical Details |
|---|---|
| Product Form | Alloy Steel Round Bar (Solid Section) |
| Standard Compliance | ASTM A29, ASTM A193, ASME SA193, EN 10083, DIN 17200, JIS G4103 |
| Diameter Range | 10 mm to 500 mm (Custom lengths and diameters available) |
| Common Alloy Grades | AISI 4130, 4140, 4145, 4340, 8620, 52100, EN19, EN24, 16MnCr5, 20MnCr5 |
| Applications | Automotive Transmissions, Aerospace Fasteners, Oil & Gas Tools, Heavy Engineering |
| Mechanical Properties | High Tensile Strength, Excellent Fatigue Resistance, Superior Toughness |
| Quality Assurance | Ultrasonic Tested (UT), Magnetic Particle Inspection (MPI), EN 10204 3.1 MTC |
| Surface Finish | Hot Rolled (Black), Cold Drawn (Bright), Centerless Ground, Peeled |
| Manufacturing Process | Hot Rolled, Forged, Quenched & Tempered (Q&T), Normalized |
| Heat Treatment | Hardened & Tempered, Annealing, Stress Relieving, Case Hardening |
| Dimensional Tolerance | Precision Tolerances as per ISO h9, h10, h11 or Customer Specification |
Alloy Steel Round Bars Size Chart
| Size Range (mm) | Available Sections | Surface Finish | Recommended Application |
|---|---|---|---|
| 3 mm - 12 mm | Round, Hex, Square | Bright, Polished | High-strength fasteners, precision automotive parts |
| 16 mm - 50 mm | Round, Hex, Square | Cold Drawn, Hot Rolled | General engineering, machine tool components |
| 55 mm - 150 mm | Round, Square | Peeled, Centerless Ground | Shafts, gears, high-stress mechanical components |
| 155 mm - 600 mm+ | Forged Round | Peeled, As-Forged | Heavy-duty industrial machinery, oil & gas equipment |
| Custom Sizes | We accept custom sizes, specialized alloy grades (e.g., 4140, 4340, EN19), and drawing-based fabrication requests. | ||
