
34CrMo4 Seamless Mechanical Tube: Seamless Circular Steel Tube for General Engineering Purposes
Material
34CrMo4 is a low-alloy steel known for its excellent mechanical properties and versatility in engineering applications. It is primarily used in the production of seamless mechanical tubes, which are essential components in various industrial sectors. The alloy's composition includes chromium and molybdenum, which enhance its strength, toughness, and resistance to wear and fatigue.
Specification
The 34CrMo4 seamless mechanical tube is manufactured according to stringent industry standards to ensure quality and performance. These tubes are typically produced through hot rolling or cold drawing processes, resulting in a seamless, circular cross-section. The specifications for these tubes often include:
- Outer Diameter: Typically ranges from 10 mm to 500 mm.
- Wall Thickness: Varies from 1 mm to 50 mm.
- Length: Customizable, usually between 3 meters to 12 meters.
- Surface Finish: Can be supplied in a variety of finishes, including polished, pickled, or oiled.
Key Features
- High Strength and Toughness: Due to its alloying elements, 34CrMo4 offers excellent strength and toughness, making it suitable for high-stress applications.
- Good Weldability: Despite its high strength, the material can be welded with appropriate techniques.
- Wear Resistance: The presence of chromium and molybdenum enhances its resistance to wear and tear.
- Versatility: Suitable for a wide range of engineering applications, from automotive to machinery manufacturing.
Chemical Composition
The chemical composition of 34CrMo4 is critical to its performance characteristics. Below is a typical composition table:
Element | Composition (%) |
Carbon (C) | 0.30 - 0.37 |
Silicon (Si) | 0.10 - 0.40 |
Manganese (Mn) | 0.50 - 0.80 |
Phosphorus (P) | ≤ 0.035 |
Sulfur (S) | ≤ 0.035 |
Chromium (Cr) | 0.90 - 1.20 |
Molybdenum (Mo) | 0.15 - 0.30 |
Mechanical Properties
The mechanical properties of 34CrMo4 are crucial for its application in engineering. The following table outlines its typical mechanical properties:
Property | Value |
Tensile Strength | 800 - 1000 MPa |
Yield Strength | ≥ 550 MPa |
Elongation | ≥ 14% |
Impact Energy | ≥ 35 J (at -20°C) |
Hardness | 229 - 285 HB |
Similar Standards and Steel Grades
34CrMo4 is equivalent to several other international standards and steel grades, making it a versatile choice for global applications. Some of the similar standards include:
- ASTM A29/A29M: 4135
- DIN EN 10083-3: 34CrMo4
- JIS G4105: SCM435
- GB/T 3077: 35CrMo
Application
34CrMo4 seamless mechanical tubes are widely used in various engineering applications due to their excellent mechanical properties and versatility. Common applications include:
- Automotive Industry: Used in the manufacturing of drive shafts, axles, and other critical components.
- Machinery Manufacturing: Ideal for producing gears, shafts, and other high-stress components.
- Oil and Gas Industry: Utilized in the production of drill pipes and other exploration equipment.
- Aerospace Industry: Employed in the construction of landing gear and other structural components.





TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and
trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
credibility among domestic and foreign customers.
The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.






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