42CrMo4 Large Diameter Rough Machined Heavy Steel Forgings for Hydraulic Cylinders

42CrMo4 Large Diameter Rough Machined Heavy Steel Forgings for Hydraulic Cylinders. Our 42CrMo4 large diameter heavy steel forgings are precision forged to meet the demanding strength and performance requirements of hydraulic cylinder components in heavy-duty industrial applications. Manufactured using high-quality 42CrMo4 alloy steel, these parts offer excellent toughness, wear resistance, and fatigue strength—making them ideal for use in harsh, high-pressure environments.

Each forging is rough machined according to customer specifications, with consistent dimensional accuracy and surface integrity. We supply forgings in weights ranging from 100 kg to 7000 kg, suitable for both small batch and bulk production needs.

Whether you require a custom forging for OEM use or replacement parts for hydraulic systems, our ISO-certified factory ensures reliable quality and on-time delivery.

Key Features

• Material: 42CrMo4 alloy steel

• Forging Process: Open die / free forging

• Machining: Rough machined only (final machining by customer)

• Size & Weight Range: Custom sizes, from 100 kg up to 7000 kg

• Application: Hydraulic cylinders, heavy machinery, mining equipment, press systems

• Standards: ISO 9001, ISO 14001, ISO 45001 certified

• Inspection: Ultrasonic testing, chemical and mechanical property testing available

• Packaging: Steel frames or wooden cases, export-safe

Process 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.