4130 Precision Seamless Steel Tubes
Product description:

Precision seamless pipe is a type of steel pipe formed by punching through round steel, with no welds on the surface. According to the production method, seamless steel pipes are divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, and hot-expanded seamless steel pipes. Seamless steel pipes are classified into two types based on their cross-sectional shape: circular and special-shaped.

4130 Precision Seamless Steel Tube is a high-strength, low-alloy steel tube manufactured through advanced cold drawing or cold rolling technology. Made from AISI 4130 (Chromoly) steel, it combines exceptional toughness, fatigue resistance, and weldability with precise dimensional accuracy and a smooth internal surface. 4130 precision seamless tubes are widely used in aerospace, automotive, hydraulic, mechanical, and energy industries, where strength, performance, and precision are critical.

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Material Overview

AISI 4130, also known as Chromoly Steel, is a chromium-molybdenum alloy steel containing approximately 0.30% carbon, 1.0% chromium, and 0.2% molybdenum. The chromium provides hardness and corrosion resistance, while molybdenum improves toughness and strength at elevated temperatures. This balanced alloy composition makes 4130 steel ideal for applications requiring both strength and ductility. It is easily heat-treated, machined, and welded, offering outstanding mechanical performance and long service life.

Manufacturing Process

The production of 4130 precision seamless steel tubes begins with hot rolled seamless pipes, followed by cold drawing or cold rolling to achieve tighter dimensional tolerances, higher surface quality, and improved mechanical properties. The typical manufacturing process includes:

Cold drawing/cold rolling – precisely reduces tube diameter and wall thickness.

Heat treatment (annealing or normalization) – relieves internal stresses and improves ductility.

Straightening and sizing – ensures perfect roundness and uniform wall thickness.

Surface finishing – produces bright, clean, or phosphated surfaces for corrosion protection.

The result is a high-precision seamless tube with consistent quality, tight tolerance, and superior mechanical strength.

Features

• High dimensional precision: Outer diameter tolerance within ±0.05 mm.
• Superior strength-to-weight ratio: Ideal for lightweight structural and hydraulic systems.
• Excellent fatigue resistance: Performs reliably under cyclic loading.
• Good weldability and machinability: Suitable for precision fabrication and assembly.
• Smooth internal and external surfaces: Reduces friction and enhances hydraulic efficiency.
• Customizable specifications: Available in various dimensions and surface conditions.

Application

The application scope of seamless steel pipes is very wide, including structures, fluid transportation, low to medium pressure boilers, high-pressure boilers, fertilizer equipment, petroleum cracking, geological drilling, diamond core drilling, petroleum drilling, ships, automotive half-shaft sleeves, diesel engines, etc. The use of seamless steel pipes will ensure no leakage problems, guarantee the usage effect, and improve material utilization. It can be seen that the application of seamless steel pipes mainly covers three major fields. The first is the construction field, which can be used for underground pipeline transportation, including extracting groundwater during construction. The second is the processing field, which can be used for mechanical processing, bearing sleeves, etc. The third is the electrical field, including gas pipelines and fluid pipelines for hydropower generation.

• Aerospace and aviation: Aircraft frames, landing gear, and engine components.
• Automotive industry: Roll cages, drive shafts, and suspension systems.
• Hydraulic and pneumatic systems: hydraulic cylinders, pistons, and high-pressure pipelines.
• Mechanical engineering: Shafts, machine tools, and precision machinery parts.
• Oil and gas industry: Drilling tools, structural supports, and transmission lines.
• Its high strength-to-weight ratio and fatigue resistance make it especially valuable in industries that require lightweight yet durable materials.

Why us?

We focus on the research, development, production and sales of seamless steel pipes, special-shaped steel pipes and hydraulic cylinders. We have a complete production chain and an advanced equipment system, including piercing machines, cold drawing machines, hot rolling machines, high-precision flaw detection and testing equipment. The company has passed multiple authoritative certifications such as ISO9001, API, SGS, CCS, DNV, ABS, CE, RoHS, etc., ensuring that each product complies with international standards. We are committed to providing customers with high-quality, customizable solutions to meet diverse application needs.

Relying on our own built processing base and modern workshops, combined with multiple branches and storage centers across the country, we have achieved sufficient inventory and efficient logistics coordination, significantly shortening the delivery cycle and ensuring the rapid delivery of orders.

We have established a complete service and support system. After the order is signed, the professional after-sales team can provide timely and safe on-site guidance and technical support to ensure that customers are at ease throughout the process from procurement to use.

timely and safe on-site guidance and technical support to ensure that customers are at ease throughout the process from procurement to use.

FAQ:

1. Do you support customized design and production?

Sure. We have a professional engineering team that can conduct customized design and production with special sizes, control systems or OEM according to your requirements.

2. How fast can you deliver?

In stock sizes, it takes 3-5 days. For customized sizes, it takes 30-35 days.

3. What payment methods do you support?

We support TT payment. Generally, 30% to 50% of the payment is made in advance, and the remaining amount is paid before shipment.

4. Can you provide material certification (MTC)?

Yes, we will provide MTC to you after production is completed to ensure that the material quality meets the standards.

5. What is the minimum order quantity?

Generally, we accept trial orders. The minimum order quantity is 1-3 tons, which can be determined according to different products.

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