Product Parameters
Cold Drawn Seamless Steel Tube and Pipe
Overview
Cold drawn seamless steel tubes and pipes are manufactured through a process where the tube or pipe is drawn through a die and over a mandrel, without the need for any welding or joining. This results in a product with precise dimensions, smooth surface finish, and enhanced mechanical properties compared to hot rolled or welded alternatives. The key features of cold drawn seamless steel tubes and pipes include:
Precise dimensions: Cold drawing process allows for tight tolerances and accurate dimensions.
Smooth surface finish: The absence of welding seams ensures a smooth internal and external surface finish, which is beneficial for various applications.
Improved mechanical properties: Cold drawing refines the grain structure of the steel, resulting in enhanced strength, hardness, and toughness.
Wide range of sizes and shapes: Cold drawn seamless steel tubes and pipes are available in various sizes, shapes, and lengths to suit diverse industrial applications.
Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.20 max |
| Manganese (Mn) | 0.50-1.50 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
| Silicon (Si) | 0.10-0.35 |
Mechanical Properties
| Property | Value |
| Tensile Strength (MPa) | 415 min |
| Yield Strength (MPa) | 240 min |
| Elongation (%) | 30 min |
| Hardness (HB) | 95 max |
Physical Properties
| Property | Value |
| Density (g/cm³) | 7.85 |
| Melting Point (°C) | 1420-1460 |
| Thermal Conductivity (W/m·K) | 50.2 |
| Specific Heat (J/kg·K) | 473 |
Process Performance
| Property | Value |
| Cold Workability | Excellent |
| Machinability | Good |
| Weldability | Fair |
| Corrosion Resistance | Moderate to Good |
Steel Grade
The most common steel grade for cold drawn seamless steel tubes and pipes is ASTM A519 Grade 1020. This grade offers a good balance of mechanical properties, machinability, and weldability, making it suitable for a wide range of applications.
Application
Cold drawn seamless steel tubes and pipes find application in various industries, including:
Automotive: for the manufacturing of components such as hydraulic cylinders, shock absorbers, and drive shafts.
Machinery: for the production of precision mechanical components and parts.
Oil and Gas: in drilling and exploration operations, as well as in the construction of pipelines and equipment.
Aerospace: for the fabrication of structural components and hydraulic systems.
Possible Alternative Grades
While ASTM A519 Grade 1020 is widely used, there are several alternative grades available depending on specific requirements:
ASTM A519 Grade 1010: Offers similar mechanical properties with slightly lower carbon content.
ASTM A519 Grade 1045: Provides higher strength and hardness compared to Grade 1020, suitable for applications requiring increased toughness and wear resistance.
ASTM A519 Grade 4130: Contains chromium and molybdenum for improved corrosion resistance and high-temperature strength, commonly used in aerospace and oil and gas industries.
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