GB 8713 Hydraulic Steel Pipe
Introduction
GB 8713 is a Chinese standard for hydraulic steel pipes. These pipes are widely used in various industries for hydraulic systems, such as in construction machinery, mining equipment, and agricultural machinery. This article provides an overview of GB 8713 hydraulic steel pipes, including their material, specification, key features, chemical composition, mechanical properties, physical properties, process performance, steel grade, application, and possible alternative grades.
Material and Specification
GB 8713 hydraulic steel pipes are made from high-quality carbon structural steel. The standard specifies the material as 20#, 35#, 45#, Q345B, Q345D, Q345E, 20Mn2, 25Mn, 27SiMn, and other materials. The pipes are manufactured with a seamless process and have a circular cross-section. The outer diameter ranges from 4mm to 120mm, and the wall thickness varies from 0.5mm to 20mm. The length of the pipes can be customized according to the requirements.
Key Features
GB 8713 hydraulic steel pipes possess several key features that make them suitable for hydraulic systems:
High Strength: These pipes are made from carbon structural steel, providing excellent strength and durability.
Good Toughness: The material used in GB 8713 pipes exhibits good toughness, ensuring resistance to impact and vibration.
Corrosion Resistance: The pipes are designed to resist corrosion, making them suitable for various environments.
Precision Dimension: GB 8713 pipes are manufactured with precise dimensions, ensuring compatibility and ease of installation.
Smooth Surface: The pipes have a smooth surface finish, reducing friction and facilitating fluid flow.
Chemical Composition
| Steel Grade | C% | Si% | Mn% | P% | S% |
| 20# | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 |
| 35# | 0.32-0.39 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 |
| 45# | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 |
| Q345B | 0.17-0.22 | 0.17-0.37 | 1.20-1.60 | ≤0.030 | ≤0.030 |
| Q345D | 0.18-0.24 | 0.17-0.37 | 1.20-1.60 | ≤0.030 | ≤0.030 |
| Q345E | 0.18-0.24 | 0.17-0.37 | 1.20-1.60 | ≤0.030 | ≤0.030 |
| 20Mn2 | 0.17-0.24 | 0.17-0.37 | 1.40-1.80 | ≤0.030 | ≤0.030 |
| 25Mn | 0.22-0.29 | 0.17-0.37 | 0.70-1.00 | ≤0.030 | ≤0.030 |
| 27SiMn | 0.24-0.32 | 1.10-1.40 | 0.80-1.10 | ≤0.030 | ≤0.030 |
Mechanical Properties
| Steel Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| 20# | ≥410 | ≥245 | ≥25 |
| 35# | ≥510 | ≥305 | ≥20 |
| 45# | ≥590 | ≥335 | ≥14 |
| Q345B | ≥470 | ≥345 | ≥21 |
| Q345D | ≥470 | ≥345 | ≥21 |
| Q345E | ≥470 | ≥345 | ≥21 |
| 20Mn2 | ≥470 | ≥345 | ≥21 |
| 25Mn | ≥490 | ≥325 | ≥21 |
| 27SiMn | ≥800 | ≥600 | ≥10 |
Physical Properties
The physical properties of GB 8713 hydraulic steel pipes include density, thermal conductivity, specific heat capacity, and electrical resistivity. These properties may vary depending on the specific steel grade used.
Process Performance
GB 8713 hydraulic steel pipes exhibit excellent process performance, including weldability, cold bending properties, and machinability. The pipes can be easily welded using common welding techniques. They can also be bent without cracking or deformation, allowing for flexibility in installation. Additionally, the pipes can be machined to achieve precise dimensions and smooth surfaces.
Steel Grade, Application, and Possible Alternative Grades
The steel grade selection for GB 8713 hydraulic steel pipes depends on the specific application requirements. Different steel grades offer varying levels of strength, toughness, and corrosion resistance. Here are some common steel grades and their applications:
20#, 35#, 45#: Suitable for general hydraulic systems in various industries.
Q345B, Q345D, Q345E: Ideal for high-pressure hydraulic systems in heavy machinery and equipment.
20Mn2, 25Mn: Used in hydraulic systems requiring higher strength and impact resistance.
27SiMn: Recommended for hydraulic systems operating in harsh environments with high pressure and temperature.
Possible alternative grades to GB 8713 hydraulic steel pipes include ASTM A519, DIN 2391, and JIS G3445, which offer similar specifications and properties.
In conclusion, GB 8713 hydraulic steel pipes are reliable and versatile components for hydraulic systems. Their high strength, good toughness, and corrosion resistance make them suitable for various applications. By understanding the material, specification, key features, chemical composition, mechanical properties, physical properties, and process performance of GB 8713 hydraulic steel pipes, engineers and industry professionals can make informed decisions when selecting and utilizing these pipes in hydraulic systems.
Hot Tags: hydraulic steel pipe, China, suppliers, manufacturers, factory, customized, wholesale, price, OEM, mill, producer, for sale, 1.5 x 25 dom tubing, , , , 1.625 dom tubing
