Q355C seamless steel pipe is a low-alloy high-strength structural steel with good comprehensive mechanical properties, welding properties, and process properties. It is widely used in petroleum, chemical, electric power, bridges, ships, aerospace, and other fields.
Implementation standards of Q355C seamless steel pipe: GB/T8162 seamless steel pipe for structure, GB/T8163 seamless steel pipe for conveying fluid
Q355C seamless steel pipe should meet the requirements of TSGD7002 pressure pipeline component type test rules.
Chemical composition of Q355C seamless steel pipe: carbon: 0.12~0.20, silicon: 0.20~0.50, manganese: 1.20~1.70, chromium: ≤0.30, molybdenum: ≤0.10, vanadium: ≤0.15, niobium: ≤0.07, nickel ≤0.50, phosphorus: ≤0.030, sulfur: ≤0.030.
Mechanical properties of Q355C seamless steel pipe: tensile strength: 470~630MPa, yield strength ≥355, 0 degree impact absorption ≥34.
Product specifications of Q355C seamless steel pipe: outer diameter 19mm~1020mm, wall thickness 2.0mm~140mm.
Production methods of Q355C seamless steel pipe: hot rolling, cold drawing, fine rolling, hot expansion. Delivery status: heat treatment
First, the characteristics of Q355C seamless steel pipe
1. High strength and low cost: The yield strength of Q355C seamless steel pipe is 355MPa, which is higher than the strength level of ordinary carbon structural steel. Due to its low alloy content, Q355C seamless steel pipe has a low cost, and it also has high strength and toughness, which can meet the needs of various complex structures.
2. Good welding performance: Q355C seamless steel pipe has good welding performance and can meet the requirements of various welding processes, such as arc welding, submerged arc welding, gas shielded welding, etc. At the same time, due to its low alloy content, it is not easy to produce defects such as cracks and brittle fractures during welding.
3. Good process performance: Q355C seamless steel pipe has good process performance, can be bent, straightened, sheared, and in other ways, and is convenient for making various structural parts. In addition, Q355C seamless steel pipe also has good corrosion resistance and weather resistance, and can be used for a long time under harsh environmental conditions.
Second, the application of Q355C seamless steel pipe
1. Petrochemical industry: In the petrochemical industry, Q355C seamless steel pipe is widely used in pipelines, pressure vessels, reactors, and other equipment. Due to its high strength and good corrosion resistance, it can meet the high requirements of the petrochemical industry for equipment.
2. Power industry: In the power industry, Q355C seamless steel pipe is mainly used to manufacture important components in equipment such as boilers and steam turbines. Due to its good mechanical properties and process performance, it can meet the high requirements of the power industry for equipment.
3. Bridge engineering: In bridge engineering, Q355C seamless steel pipe is mainly used to manufacture supporting structures and bridge decks of bridges. Due to its high strength and good durability, it can ensure the safety and stability of bridges.
4. Shipbuilding industry: In the shipbuilding industry, Q355C seamless steel pipe is mainly used to manufacture structural parts such as hulls and decks of ships. Due to its good welding performance and corrosion resistance, it can ensure the structural safety and service life of ships.
5. Aerospace industry: In the aerospace industry, Q355C seamless steel pipe is mainly used to manufacture key components such as aircraft fuselages and wings. Due to its high strength, low density, and good corrosion resistance, it can meet the high requirements of the aerospace industry for materials.
Third, summary
Q355C seamless steel pipe, as a low-alloy high-strength structural steel, has a wide range of applications and market demand. Its high strength, good welding and process performance, corrosion resistance, and weather resistance make it widely used in petroleum, chemical industry, electric power, bridges, ships, aerospace, and other fields. With the continuous development and progress of industrial technology, the application prospects of Q355C seamless steel pipe will be broader.
Post time: Jul-23-2025