Q355E Seamless Carbon Steel Hexagonal Tube -40℃ Low Temp Hex Pipe for Russian Heavy Machinery

Q355E Seamless Carbon Steel Hexagonal Tube -40℃ Low Temp Hex Pipe for Russian Heavy Machinery

Production Descripition:

Our seamless hexagonal pipe adopts Q355E low alloy carbon steel, matching Russian standard 09Г2С. It maintains stable toughness at -40℃ and avoids brittle fracture under heavy vibration. Yield strength reaches 355MPa, great welding and machining performance. Size customizable: cross flat 15–180mm, wall thickness 3–18mm, arbitrary length with optional anti-rust surface. Main applications: excavator brackets, crane outriggers, mining equipment supports, hydraulic structural parts. Complete inspection certificates provided for smooth customs clearance to Russia, support samples and bulk orders.

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Material Overview: S50 Carbon Steel

S50 steel, classified as a medium carbon structural steel, features a strong balance of hardness, tensile strength, and ductility. The typical chemical composition includes:

• Carbon (C): 0.47–0.53%
• Manganese (Mn): 0.60–0.90%
• Silicon (Si): 0.15–0.35%
• Sulfur (S): ≤ 0.035%
• Phosphorus (P): ≤ 0.035%

This composition allows S50 steel to deliver tensile strength above 700 MPa, yield strength above 400 MPa, and excellent wear resistance after proper heat treatment. It can be easily quenched and tempered to achieve specific mechanical properties, making it suitable for demanding industrial environments.

Manufacturing Process

S50 hexagonal pipes are manufactured through a controlled forming and heat-treatment process to achieve precision geometry and high structural integrity:

• Raw Material Selection: Premium S50 carbon steel billets are selected for their purity and strength.
• Hot Rolling or Cold Drawing: Produces seamless or welded base tubes with uniform wall thickness.
• Hexagonal Forming: Tubes are drawn or rolled through precision dies to create a six-sided profile.
• Heat Treatment: Quenching and tempering improve hardness, tensile strength, and toughness.
• Surface Finishing: Polishing, pickling, or black oxide coating enhances corrosion resistance.
• Precision Inspection: Ensures accurate hexagonal dimensions, straightness, and surface smoothness.

This process ensures the finished product has excellent surface quality, consistent geometry, and reliable mechanical performance.

Features and Advantages

• High Strength and Hardness: Ideal for applications requiring resistance to bending and torsion.
• Superior Dimensional Accuracy: Tight tolerance across flats ensures precision assembly.
• Excellent Machinability: Easy to cut, drill, and machine into custom shapes.
• Durable and Wear-Resistant: Maintains strength under heavy mechanical loads.
• Good Weldability: Compatible with standard welding techniques.
• Corrosion and Oxidation Resistance: Enhanced through coating or plating options.
• Stable Hexagonal Geometry: Prevents slippage and ensures secure mechanical connections.

Applications:

• The S50 hexagonal pipe is widely used in sectors that demand precision, strength, and reliable torque resistance. Common applications include:
• Mechanical Parts: Shafts, couplings, bushings, and connectors.
• Automotive Components: Steering rods, drive shafts, bolts, and axles.
• Hydraulic and Pneumatic Systems: Tubes and fittings for high-pressure transmission.
• Industrial Machinery: Frames, tooling, and support structures.
• Construction and Architecture: Decorative frames, support columns, and structural elements.
• Fasteners and Tools: Hexagonal nuts, bolts, and wrench components.

The S50 hexagonal pipe’s six-sided geometry ensures easy assembly and high torsional stability, making it perfect for applications where rotational and mechanical precision are critical.

Company profile:

Certification:

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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.