ALLOY STEEL BARS
Product Description
Product Description Alloy Steel Bars are engineered steel materials enhanced with chromium, molybdenum, nickel, manganese, and other alloying elements to achieve high strength, wear resistance, and long working durability. These bars are widely used in precision mechanical components of electric motors, submersible pumps, agricultural pumps, and industrial pumping systems. They ensure excellent machinability, heat treatment response, and dimensional stability required for high-performance rotating components.
Applications
Common applications in the Motor & Pump Industry include:
- Motor Shafts
- Pump Shafts
- Rotor Shafts
- Impeller Components
- Keyed and Threaded Shafts
- Gear & Coupling Parts
- Housing & Mechanical Support Components
- Bushings / Sleeves
- Fasteners / Bolts for Heavy Pump Assembly
Key Features
- High tensile strength and hardness
- Excellent fatigue and impact resistance
- Wear and corrosion resistance
- Suitable for machining, grinding, threading & polishing
- Compatible with heat treatments (Quenching, Annealing, Tempering)
- Long service life under continuous duty applications
Available Grades
| Grade | Standard Equivalent | Property / Application |
|---|---|---|
| EN8 (080M40) | Medium Carbon Steel | Good machinability, suitable for general shafts. |
| EN19 (4140 / 42CrMo4) | Alloy Steel | High strength, used for high-speed rotating shafts. |
| EN24 (4340 / 817M40) | Ni-Cr-Mo Steel | Superior fatigue resistance for heavy-duty motors. |
| EN31 (52100 / SUJ2) | Bearing Steel | High hardness, used for precision rotating assemblies. |
| 42CrMo4 | DIN Standard | Suitable for precision CNC shaft components. |
| 40Cr / 4140 | Chinese / US Standard | Widely used for pump shafts and mechanical parts. |
| Note: Custom grades are available based on OEM requirements. | ||
Technical Specifications
| Parameter | Range / Specification |
|---|---|
| Diameter | 10 mm – 300 mm |
| Length | 1 m – 6 m (Custom cut-to-length available) |
| Surface Finish | Hot Rolled / Cold Drawn / Bright Polished / Peeled / Ground & Polished (H9/H7 Tolerance) |
| Hardness | 160–320 HB (Raw Material) / Up to 58 HRC (Heat Treated) |
| Heat Treatment Option | Annealed, Quenched & Tempered (Q&T), Case Hardened, Normalized |
| Straightness | ≤ 0.5 mm per meter |
| Tolerance | ISO, H8 / H9 / H11, or Customer Specification |
Mechanical Properties (Typical Values – Grade Dependent)
| Property | Value |
|---|---|
| Tensile Strength | 650 – 1100 MPa |
| Yield Strength | 400 – 950 MPa |
Mechanical Properties (Typical Values – Grade Dependent)
| Property | Value |
|---|---|
| Elongation | 10–18% |
| Impact Value (Charpy V-Notch) | ≥ 30–40 Joules |
| Surface Roughness (Polished Shafts) | Ra ≤ 0.8 µm |
Surface Protection
- Black Oxide Coating
- Zinc Plating
- Oil Coated Anti-Rust
- Chrome Plating (Special Orders)
Industry Compliance
- ISO 683-1
- ASTM A322
- DIN EN 10083
- RoHS / CE Compliant Material
Packaging
- Bundled with Steel Straps
- Wrapped in HDPE / Anti-Rust Paper
- Wooden Cases for Precision Machined Bars
Benefits
- Improves motor efficiency and reliability
- Withstands high rotational load and vibration
- Low maintenance and long operational life
- Suitable for OEM and aftermarket applications