High-Strength Hollow Alloy Steel Forging Blank for Rotary Machinery
Price:
USD1000-USD2000/piece
MOQ:
1
Delivery Time:
30days
Brand:
Tiangong
Product Description
High-Strength Hollow Alloy Steel Forging Blank for Rotary Machinery.This forged hollow alloy steel blank is engineered for critical rotary applications requiring high strength, fatigue resistance, and dimensional stability under cyclical loading. Produced through hot open-die forging and precision boring, it offers exceptional metallurgical integrity and customizable geometry for a wide range of rotating components.
Product Features
- Optimized Strength-to-Weight: Hollow design reduces weight while maintaining exceptional strength for high-speed machinery.
- Superior Material Integrity: Forging refines grain, eliminating defects for enhanced toughness and ductility.
- High Fatigue Resistance: Engineered from alloy steel to resist cyclic loading and torsional stresses, extending lifespan.
- Excellent Machinability: Controlled forging ensures material is amenable to precise machining for tight tolerances.
- Customizable: Available in various alloy grades and tailored dimensions to meet specific rotary application needs.
- Enhanced Heat Treatment Response: Allows for optimal response to heat treatments for customized hardness and mechanical properties.
Application Scenarios
These hollow alloy steel forging blanks are essential for critical components in demanding rotary machinery across diverse industries:
- Turbomachinery: Ideal for turbine and compressor shafts, and hollow rotor components in gas and steam turbines.
- Wind Power: Used for hollow main shafts or internal gearbox shafts, optimizing weight while maintaining immense strength.
- High-Speed Industrial Gearboxes: For hollow input, intermediate, or output shafts where reduced inertia and high torque are vital.
- Marine & Offshore Propulsion: Components for hollow propeller shafts and main transmission shafts in ships and offshore platforms.
- Large Motors & Generators: Used for hollow rotor shafts, balancing weight with the need for robust structural integrity.
- Aerospace & Defense: For various hollow shafts and rotating components where weight reduction and reliability are paramount.
- Heavy Industrial Rollers/Spindles: For large, strong, yet lighter-weight rotating elements in specialized machinery.
| Item | Details |
|---|---|
| Product Name | High-Strength Hollow Alloy Steel Forging Blank for Rotary Machinery |
| Material Grades | - High-performance alloy steels: 42CrMo4 / 35CrMo/ 18CrNiMo7-6 - Superior tensile strength, impact resistance, and fatigue life - Designed for hollow-core components operating under rotary stress |
| Forging Equipment | - Hydraulic hammers: 5T / 8T / 12T - Large open-die forging press with axial boring capabilities - Supports near-net shape forging with internal bore formation |
| Manufacturing Process | Hot Forging → Intermediate Heat Treatment → Core Boring / Drilling → Rough / Semi-Finish Machining → UT & Dimensional Inspection |
| Forging Ratio | ≥ 3.0 — Enhances grain orientation around the bore, critical for minimizing fatigue cracks and maintaining balance in rotating parts |
| Applications | - Rotary shafts, bored coupling sleeves, hollow drums, and tubular drive shafts - Ideal for gearboxes, kilns, mixers, and rolling mill transmissions - Engineered to handle torsional vibration, internal cooling channels, and cyclical dynamic loads |
| Heat Treatment Options | - Quenched + Tempered for maximum core strength and toughness - Optional stress relief for dimensional stability prior to precision machining |
| Testing & Inspection | - Chemical: Spectrometer-controlled alloy verification - Mechanical: Hardness, tensile strength, yield, and Charpy impact - Ultrasonic (UT): Multi-angle scanning focused on internal bore zones - Dimensional: Bore diameter, straightness, wall thickness, concentricity, and length control |
| Value-Added Services | - Custom bore diameter, wall profile, and external features - Pre-machined surfaces (journals, end faces, grooves) - Rust-preventive coating, end protection, steel banding & crate packaging - Laser marking, OEM branding, and complete traceability documents |
|
Item
|
42CrMo Alloy Steel
|
18CrNiMo7-6 Alloy Steel
|
|
Steel Grade (GB / ASTM)
|
42CrMo / 42CrMo4 (Equivalent to AISI 4140 / SAE 4140)
|
18CrNiMo7-6 / 1.6587 (Equivalent to AISI 4320)
|
|
Carbon Content
|
Approx. 0.38–0.45%
|
Approx. 0.15–0.21%
|
|
Tensile Strength
|
850–1100 MPa (after quench & temper)
|
1180–1380 MPa (quenched and tempered)
|
|
Yield Strength
|
≥ 740 MPa
|
≥ 1080 MPa
|
|
Hardness (HBW)
|
280–360 (quenched & tempered)
|
341–388 (quenched & tempered)
|
|
Toughness
|
Excellent toughness and fatigue resistance
|
Exceptionally high toughness, superior fatigue and wear resistance
|
|
Machinability
|
Moderate, machining recommended after heat treatment
|
Moderate, requires careful machining due to high alloy content
|
|
Heat Treatment Options
|
Quenched and Tempered (standard for shafts)
|
Quenched and Tempered, Carburized, Nitrided
|
|
Typical Applications
|
Drive Shafts / Couplings, Roll Shafts, Reactor Shaft, Yaw / Pitch Shaft
|
Transmission gears, axles, high-load bearing components, aerospace and automotive critical parts
|
|
Forging Suitability
|
Ideal for high-strength, high-fatigue wind turbine shafts
|
Excellent forging properties, suitable for complex high-stress components
|
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Changzhou Tiangong Forging Co., Ltd.
Location
Wangxia Village, Luoxi Town, Xuejia Town, Xin Bei District, Changzhou City, Jiangsu Province, China
Contact Person
Mia Liu