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Changzhou Tiangong Forging Co., Ltd.

  • China,Changzhou ,Jiangsu
  • Verified Supplier
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China Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment.
China Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment.

  1. China Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment.
  2. China Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment.
  3. China Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment.

Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment.

  1. MOQ: 1
  2. Price: USD1000-USD2000/piece
  3. Get Latest Price
Payment Terms T/T
Supply Ability 56000 Tons per year
Delivery Time 30days
Packaging Details Pallet
Application Wind power, port machinery, mining and oil extraction
Quality Control Ultrasonic tested (UT) & Mechanical Properties
Material Customized
Production Process Forging
Hardness Customized according to customer requirements
Surface Finish Smooth
Heat Treatment Annealing and tempering
Size Customized according to drawings
Brand Name Tiangong
Certification ISO9001, ISO14001,ISO45001
Place of Origin Changzhou, China

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Product Specification

Payment Terms T/T Supply Ability 56000 Tons per year
Delivery Time 30days Packaging Details Pallet
Application Wind power, port machinery, mining and oil extraction Quality Control Ultrasonic tested (UT) & Mechanical Properties
Material Customized Production Process Forging
Hardness Customized according to customer requirements Surface Finish Smooth
Heat Treatment Annealing and tempering Size Customized according to drawings
Brand Name Tiangong Certification ISO9001, ISO14001,ISO45001
Place of Origin Changzhou, China
High Light industrial equipment steel forging blanksteel forging blank hot forgedhot forged cylindrical steel forging

Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment. The Heavy-Duty 42CrMo Cylindrical Steel Forging Blank is a high-strength, hot-forged component specifically designed for use in industrial equipment subjected to extreme mechanical loads. Manufactured from premium 42CrMo alloy steel, this forging blank offers excellent tensile strength, impact resistance, and hardenability—making it ideal for shafts, sleeves, rollers, and other critical rotary or structural parts.

What is it?

The Heavy-Duty 42CrMo Cylindrical Steel Forging Blank is a hot-forged, semi-finished component made from high-strength alloy steel (42CrMo / AISI 4140), specifically engineered for use in large industrial equipment. This cylindrical blank serves as a critical precursor to precision-machined parts such as main shafts, drive axles, and rotary components across heavy-duty applications.


Key Features

  • High Strength & Toughness: 42CrMo alloy provides exceptional tensile strength, hardenability, and impact resistance, ideal for dynamic and torsional load conditions.

  • Optimized Grain Flow: Forged along the axis to enhance fatigue resistance and structural integrity under high-cycle stress.

  • Heat Treatable: Supports quenching and tempering to achieve customized mechanical properties.

  • Dimensional Versatility: Available in various diameters and lengths, suitable for 1–6 MW wind turbines and heavy-duty rotary systems.

  • Excellent Machinability: Suitable for rough and precision machining, with optional pre-machined features such as center holes and keyways.


Available Types

      1. Solid Cylindrical Forging Blanks
        For general-purpose machining, commonly used as the base for shafts or rollers.

      2. Pre-Machined Shaft Blanks
        With rough-turned surfaces and center holes, designed for easier downstream processing and alignment.

      3. Long-Length Forged Blanks
        Suitable for turbine main shafts and drive shafts exceeding 3000 mm in length.

      4. Custom Profiled Cylindrical Blanks
        Tailored with journals, flanges, or keyways according to OEM design requirements.

Item Details
Product Name Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment
Material Grades - Premium alloy steel: 42CrMo / 42CrMo4 / AISI 4140 - Excellent hardenability, impact toughness, and fatigue resistance - Optimized for dynamic load environments in rotating machinery
Forging Equipment - Hydraulic hammers: 5T / 8T / 12T capacity - Open-die forging press for large cylindrical blanks - Enables deep axial forging and consistent grain alignment
Manufacturing Process Hot Forging → Heat Treatment (QT) → Rough / Semi-Finish Machining → Straightness Correction → UT & Dimensional Inspection
Forging Ratio ≥ 3.0 — Ensures refined grain structure and axial fiber flow, enhancing torsional resistance and structural integrity
Applications - Designed for wind turbine main shafts, yaw & pitch shafts, and large transmission shafts - Suitable for high-cycle, heavy-load industrial systems (e.g., 1–6 MW turbines) - Withstands torsional loads, bending stress, and axial vibration over extended service life
Heat Treatment Options - Quenched + Tempered for enhanced strength and toughness - Optional stress relief prior to machining for improved dimensional stability
Testing & Inspection - Chemical: Spectrometer analysis for alloy consistency - Mechanical: Hardness, tensile, yield strength, Charpy impact  - Ultrasonic (UT): Full-volume testing  - Dimensional: Length, diameter, concentricity, straightness, machining tolerances
Value-Added Services - Custom length & diameter options  - Optional pre-machining (center holes, journals, threads, or keyways) - Protective coatings, export-grade packaging (wooden crate, steel banding, end caps) - OEM logo stamping, part number engraving, and traceability documentation available

 

Item 42CrMo Alloy Steel
Steel Grade (GB / ASTM) 42CrMo / 42CrMo4 (Equivalent to AISI 4140 / SAE 4140)
Carbon Content Approx. 0.38–0.45%
Tensile Strength 850–1100 MPa (after quench & temper)
Yield Strength ≥ 740 MPa
Hardness (HBW) 280–360 (quenched & tempered)
Toughness Excellent toughness and fatigue resistance
Machinability Moderate, machining recommended after heat treatment
Heat Treatment Options Quenched and Tempered (standard for shafts)
Typical Applications Drive Shafts / Couplings,Roll Shafts,Reactor Shaft,Yaw / Pitch Shaft
Forging Suitability Ideal for high-strength, high-fatigue wind turbine shafts
Cost Higher cost due to alloying and processing complexity

 

 

The steel forgings production flow:

raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.

 

Frequently Asked Questions (FAQs)
1. What is your forging weight range?
We produce forged parts ranging from 100 kg to 7000 kg.

2. Do you provide heat treatment and machining?
Yes, we offer full in-house heat treatment, rough, and finish machining services.

3. Which industries do you supply to?
We serve wind energy, heavy equipment, port machinery, transmission systems, and more.

4. What is your production lead time?

With stock: Around 30 days

Without stock: 40–45 days

5. Where is your factory located?
In Changzhou City, near Shanghai, with shipping via Shanghai Port.

 

Request a Quote
Please send your technical drawings and requirements to us. Our engineers will review and provide you with a professional quotation and solution shortly.

Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory
  • Business Type:

    Manufacturer,Exporter,Seller

  • Year Established:

    1994

  • Total Annual:

    27.5 million -28 million

  • Employee Number:

    135~150

  • Ecer Certification:

    Verified Supplier

About CHANGZHOU TIANGONG    We are a Chinese company with over 30 years of forging experience. Our focus lies in the production of machine free forged products. We take pride in our independent quality assurance laboratory, which ensures that all our products meet ... About CHANGZHOU TIANGONG    We are a Chinese company with over 30 years of forging experience. Our focus lies in the production of machine free forged products. We take pride in our independent quality assurance laboratory, which ensures that all our products meet ...

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  • Changzhou Tiangong Forging Co., Ltd.
  • Wangxia Village, Luoxi Town, Xuejia Town, Xin Bei District, Changzhou City, Jiangsu Province, China
  • https://www.freeforgings.com/

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