Our Alloy Steel Bars and Shafts are the preferred choice for high-stress mechanical components requiring a superior combination of hardness, ductility, and high-fatigue life.
Available in hot-rolled (Black) and cold-finished (Bright) conditions, our bars are engineered to withstand the intense torsional and bending stresses of rotating equipment. By utilizing advanced heat treatment processes like annealing, normalizing, and tempering, we achieve a refined metallurgical structure that maximizes wear resistance. These shafts are essential for manufacturing high-speed gears, axles, and drive components in the automotive, aerospace, and heavy machinery industries.
We supply a comprehensive inventory of AISI 4140, 4340, and ASTM A182 F11/F22/F91 Bars in Round, Hexagonal, and Square profiles. For mission-critical applications, we offer Precision Centerless Ground Shafting with tight dimensional tolerances (h8, h9) to ensure perfect balance and minimal vibration in rotating assemblies. Every bar is ultrasonic tested and PMI verified, ensuring that the raw material meets the rigorous safety and performance standards of the modern engineering landscape.
| Specification | Technical Details |
|---|---|
| Material Standards | ASTM A182 (Forged), ASTM A322 (Hot Rolled), ASTM A29, AISI, SAE |
| Available Grades | AISI 4140, 4340, 8620, ASTM A182 F11, F22, F91, EN19, EN24 |
| Bar Profiles | Round Bars, Hexagonal Bars, Square Bars, Flat Bars, Forged Shafts |
| Size Range | Diameter: 5mm to 500mm | Length: Up to 12 Meters (Custom Cut available) |
| Dimensional Tolerances | h8, h9, h10, h11, k12 (Precision Centerless Ground) |
| Surface Finishes | Bright Polished, Centerless Ground, Cold Drawn, Smooth Turned, Peeled, Black (Hot Rolled) |
| Heat Treatment | Quenched & Tempered (Hardened), Annealed, Normalized, Stress Relieved |
| Technical Testing | Ultrasonic Test (UT), Magnetic Particle Inspection (MPI), PMI, Surface Roughness Check |
| Mechanical Testing | Tensile Test, Yield Strength, Hardness (Brinell/Rockwell), Izod/Charpy Impact Test |
| Value Added Services | Precision Saw Cutting, Chamfering, Hard Chrome Plating, Threading, Boring |
| Standard / Classification | Available Material Grades & Engineering Attributes |
|---|---|
| High-Tensile Engineering Grades | AISI 4140, 4340, 8620, 4130, EN19, EN24 (Quenched & Tempered) |
| ASTM A182 (Forged Bar Grades) | F5, F9, F11, F12, F22, F91 (High-Temperature Pressure Service) |
| Precision Tolerances | ISO h8, h9, h10, h11 (Precision Ground for Pump Shaft Quality) |
| Dimensional Standards | ASTM A29 (General Requirements), ASTM A322 (Hot Rolled), ASTM A108 |
| Surface Finish Options | Centerless Ground, Bright Polished, Peeled & Turned, Smooth Cold Drawn |
| Heat Treatment Conditions | Annealed, Normalized, Hardened & Tempered, Stress Relieved |
| Mechanical Standards | Tensile Strength (850-1000 MPa), Hardness (28-32 HRC), Impact testing |
| Internal Integrity Testing | Ultrasonic Test (UT) per ASTM A388, Magnetic Particle (MPI) per ASTM A275 |
| Material Certification | EN 10204 3.1 / 3.2 MTC, PMI Tested, Surface Roughness (Ra) Verified |
The most versatile profile for machining. Ideal for gears, fasteners, and structural pins requiring high-tensile strength.
Pump Shaft Quality (PSQ) bars with tight h8/h9 tolerances. Minimized vibration for high-speed rotating equipment.
Six-sided bars ideal for manufacturing high-strength bolts, nuts, and hydraulic valves where torque resistance is key.
Custom-forged step shafts and spindles for heavy machinery. Refined grain structure for maximum impact resistance.
High-strength square profiles used for machine tool holders, keys, and heavy structural mounting blocks.
Precision-edged flat bars for structural reinforcements and specialized tooling components.
Dhanavir Steel is a premier stockholder and global supplier of high-performance Stainless Steel, Special Alloys and Nickel Alloys.
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Dhanavir Steel provides end-to-end industrial steel solutions, specializing in Pipes, Fittings, and Flanges. We combine technical expertise in NACE and IBR testing with a robust global supply chain to deliver quality-assured materials for demanding environments.
Dhanavir Steel provides end-to-end industrial steel solutions, specializing in Pipes, Fittings, and Flanges. We combine technical expertise in NACE and IBR testing with a robust global supply chain to deliver quality-assured materials for demanding environments.