4130 Chromoly Tube

What is 4130 Chromoly Tubing?

4130 chromoly tube is a high-strength alloy steel tubing widely used in applications demanding durability and lightweight performance. Made primarily from chromium and molybdenum alloyed with carbon steel, this 4130 alloy steel offers exceptional toughness, weldability, and resistance to wear.

Compared to mild steel or other common tubing materials, 4130 steel properties make it significantly stronger and more resilient while maintaining good machinability. Its balance of strength and ductility is why it’s a preferred choice for chromoly tubing used in precision CNC machining and demanding structural projects.


  • Composition: Chromium (0.8%), Molybdenum (0.2%), Carbon (~0.3%)

  • Comparison: Higher strength-to-weight vs mild steel, better fatigue resistance

  • Key Benefits: Seamless 4130 tubing offers excellent weldability, toughness, and corrosion resistance

Whether you need chrome moly pipe for aerospace frames, roll cage tubing, or custom parts requiring CNC machining chromoly, 4130 chromoly tubing stands out as a reliable, premium-grade material that balances cost and performance perfectly.

Applications of 4130 Chromoly Tubing

4130 Chromoly Tubing Industrial Uses

4130 chromoly tube is a go-to choice across multiple industries thanks to its strength, durability, and lightweight nature. From aerospace components to high-performance roll cage tubing, its versatile 4130 alloy steel composition meets the toughest demands.


  • Aerospace Chromoly Tubing: Ideal for structural parts and assemblies where precision and strength are vital.

  • Motorsports: Widely used for roll cage tubing and chassis fabrication to enhance without adding weight.

  • Cycling: Perfect for lightweight, durable bike frames that stand up to demanding rides and long use.

  • Oil & Gas and Other Industries: Resists corrosion and high pressure, making it a solid choice for pipes and custom chromoly fabrication.

For precision needs like seamless 4130 tubing or custom designs, CNC machining chromoly services ensure tight tolerances and quality finishes.

Why Choose HYCNC for 4130 Chromoly Tubing

When it comes to 4130 chromoly tube, I rely on HYCNC because they perfectly combine precision, quality, and speed. From seamless 4130 tubing to custom chromoly fabrication, they deliver the right fit for your application — whether it’s roll cage tubing or aerospace chromoly tubing.

Precision CNC Machining for tight tolerances and smooth finishes

Custom Fabrication tailored for your exact 4130 alloy steel needs

Strict Quality Assurance ensuring every batch meets 4130 steel properties

Fast Delivery and Local Service from a trusted 4130 tubing supplier

Technical Specifications and Options for 4130 Chromoly Tube

Available Sizes


  • Outer diameters from 0.25” up to 6.0” available

  • Wall thickness options: 0.035” to 0.25”+

  • Custom sizes can be fabricated per CNC machining requirements

Seamless vs Welded


  • Seamless 4130 tubing is stronger, preferred for critical aerospace and roll cage applications

  • Welded chrome moly pipe offers cost-efficiency for less structural demand parts

Surface Treatments


  • Precision polishing for improved corrosion resistance

  • Black oxide and phosphate finishes for added wear protection

  • Custom coatings available to fit your CNC machining chromoly fabrication needs

Expert CNC Machining Tips for 4130 Chromoly Tube

Working with 4130 alloy steel means knowing how to handle its unique properties during CNC machining. Whether you’re welding, cutting, turning, or milling this chrome moly pipe, you want precision and durability without wasting time or risking damage.

Welding 4130 Chromoly: Use proper preheat (around 300°F) to reduce stress. Stick to TIG welding for clean, strong joints ideal for roll cage tubing.

Precision Cutting: Use sharp carbide tools and reduce feed rates. Seamless 4130 tubing requires steady feed to avoid heat and maintain clean edges.

Turning and Milling: Apply coolant consistently to preserve 4130’s steel properties. Keep RPM moderate to avoid work hardening during CNC machining chromoly tubing.

How to Order 4130 Chromoly Tube from HYCNC

Getting your custom 4130 alloy steel tubing is smooth and straightforward with us. Here’s what to expect when you’re ready to request a quote and place an order for seamless 4130 chromoly tubing, roll cage tubing, or aerospace chromoly tubing.


  • Request a Quote: Share your specs and quantities so we can provide fast, competitive pricing.

  • Order Process: Once your quote is approved, we start processing your custom chromoly fabrication or CNC machining chromoly tubing service.

  • Shipping & Delivery: Timely shipping ensures your chrome moly pipe arrives ready to be integrated into your build. We partner with reliable carriers to meet your schedule.

With HYCNC, you can also benefit from precision tube cutting and specialized materials handling expertise designed for 4130 steel properties and custom projects. Get started today with confidence.

FAQs About 4130 Chromoly Tube


Ready to Get Your 4130 Chromoly Tube?

Whether you’re working on roll cage tubing, aerospace chromoly tubing, or custom chromoly fabrication, we offer seamless 4130 tubing with superior 4130 steel properties you can trust. Our CNC machining chromoly services match your specs and deliver reliable chrome moly pipe ready for your toughest jobs.

Scroll to Top