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What is steel pipe? Steel pipe is an important industrial material with a hollow section. It has excellent corrosion resistance, high temperature resistance, durability and other properties. It is widely used in construction, large bridges, transportation systems and other fields. This article will introduce in detail the types, grades, chemical compositions, properties, applications and other information of steel pipes.
The following are the grades and chemical compositions of some common steel pipes:
| No. | Equivalent Grade | Chemical Composition（%） | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| - | - | C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| 1 | 30CrMnSiA | 0.28-0.34 | 0.9-1.2 | 0.8-1.1 | ≤0.02 | ≤0.02 | 0.8-1.1 | ≤0.3 | ≤0.2 | ≤0.1 |
| 2 | Q265GNH | ≤0.12 | 0.1-0.4 | 0.2-0.5 | 0.07-0.12 | ≤0.02 | 0.3-0.65 | 0.25-0.5 | 0.2-0.45 | - |
| 3 | A106 ClassA | ≤0.25 | ≥0.1 | 0.27-0.93 | ≤0.035 | ≤0.035 | ≤0.4 | ≤0.4 | ≤0.4 | ≤0.15 |
| 4 | A53 Grade B | ≤0.3 | ≤1.2 | ≤0.05 | ≤0.045 | ≤0.4 | ≤0.4 | ≤0.4 | ≤0.15 | ≤0.15 |
| 5 | STK400 | ≤0.25 | - | - | ≤0.04 | ≤0.04 | - | - | - | - |
| 6 | A335 Grade P92 | 0.07-0.13 | ≤0.5 | 0.3-0.6 | ≤0.02 | ≤0.01 | 8.5-9.5 | ≤0.4 | - | 0.3-0.6 |
Steel pipes have many excellent properties, and the properties of different types of steel pipes will be different. The following are the main properties of common steel pipes:
1.High strength: Steel pipe have high tensile strength and compressive strength, can withstand greater pressure and load, and have excellent stability and safety in some applications.
2.Good toughness: It has good toughness and can withstand a certain degree of deformation without breaking or breaking.
3.Excellent corrosion resistance: The surface of the steel pipe is enhanced with various special treatments to prevent corrosion in harsh environments such as moisture, acid and alkali, thereby giving it a longer service life.
4.Good processability: Steel pipe can be processed into various shapes and sizes through welding, bending, stretching, cutting and other processes to meet different design needs, making them more flexible and suitable for more fields.
5.Good thermal conductivity and electrical conductivity: The thermal conductivity of steel pipes is good, and there are a large number of free electrons inside, which can transfer heat and current well.
In addition to the above main properties of steel pipes, it also has high temperature resistance, good plasticity, strong pressure resistance, good sealing, etc.
Steel pipes are in great demand in infrastructure construction and urbanization development. Whether it is roads, bridges, buildings or transportation systems, a large number of steel pipes are needed to support and implement them. They play an important role in the construction field.
In the energy industry, steel pipe is widely used in heating, cooling and power transmission, and can transport media efficiently and reliably. In manufacturing, steel pipe is widely used to make components for vehicles such as cars, trains and airplanes. It is also widely used in industrial equipment, machinery and furniture manufacturing, among others.
As an important steel material in construction and transportation, steel pipe have higher quality requirements, and Songshun Steel’s steel pipe supply can not only achieve better quality, but also have a price advantage. And through enhanced technological innovation, optimized management and environmental protection measures, we meet the needs of infrastructure construction and various industries, and provide more possibilities for social development.
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