4130 Mechanical Structure Tube
4130 Mechanical structure tube 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.

The 4130 Mechanical structure tube is a high-strength, low-alloy steel commonly used in a variety of structural applications, including the aerospace, automotive, and oil & gas industries. It is known for its combination of excellent strength, good weldability, and versatility. The steel gets its name from its composition, containing primarily carbon (0.30–0.40%), chromium (0.80–1.10%), and molybdenum (0.15–0.25%), along with traces of other elements like manganese, silicon, and sulfur.

The 4130 mechanical structure tube is a high-strength, low-alloy steel commonly used in a variety of structural applications, including the aerospace, automotive, and oil & gas industries. It is known for its combination of excellent strength, good weldability, and versatility. The steel gets its name from its composition, containing primarily carbon (0.30–0.40%), chromium (0.80–1.10%), and molybdenum (0.15–0.25%), along with traces of other elements like manganese, silicon, and sulfur.

Properties and Composition

Yield Strength: 95-105 ksi (655-725 MPa)

Tensile Strength: 115-130 ksi (790-895 MPa)

Elongation: Approximately 20% in 8 inches (200mm)

Hardness: 25-30 HRC (Rockwell C Scale)

These properties make 4130 steel tube an excellent choice for structural applications requiring a balance of strength, hardness, and ductility.

Chemical Composition:

Carbon (C): 0.28–0.33%

Chromium (Cr): 0.80–1.10%

Molybdenum (Mo): 0.15–0.25%

Manganese (Mn): 0.60–0.90%

Silicon (Si): 0.15–0.35%

Sulfur (S): ≤ 0.050%

Phosphorus (P): ≤ 0.035%

The alloying elements, particularly chromium and molybdenum, impart superior hardenability, corrosion resistance, and strength, making 4130 tube a reliable choice for high-stress structural applications.

Manufacturing Process

Hot Rolling: In this process, the steel is heated above its recrystallization temperature and then shaped into tubes. This process ensures uniformity and a fine-grain structure, enhancing the tube's mechanical properties.

Cold Drawing: After hot rolling, 4130 tubes are sometimes subjected to cold drawing to refine the dimensions and improve surface finish, while also increasing yield strength. This step is commonly used for precision applications.

Heat Treatment: Heat treatments such as annealing, normalizing, or quenching and tempering can be applied to 4130 tubes to tailor the material's mechanical properties to suit specific needs. For instance, tempering is often used to achieve the right balance between strength and toughness.

Advantages:

High Strength: 4130 steel tube offers exceptional strength for its weight, making it ideal for weight-sensitive applications that require high load-bearing capacity.

Corrosion Resistance: While not as resistant to corrosion as stainless steel, the chromium content in 4130 steel provides a certain level of resistance to rust and environmental wear, especially when properly treated.

Weldability: 4130 steel has good weldability, especially when pre-heat and post-weld heat treatment are applied. This makes it ideal for creating complex welded structures.

Versatility: The material’s properties can be adjusted through heat treatment, allowing it to be tailored to specific mechanical requirements.

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.

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.

Certification:

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