GB/T6479 Q345D Low Temperature Alloy Seamless Steel Tubes
GB/T6479 Q345D Low Temperature Alloy Seamless Steel Tubes:
GB/T6479 Q345D is a standard specification for low temperature alloy seamless steel tubes in China. These tubes are specifically designed to operate in low temperature environments and exhibit excellent mechanical properties and resistance to brittle fracture. The Q345D grade refers to the steel's chemical composition and mechanical properties, making it suitable for low temperature applications.
Product Description:
GB/T6479 Q345D low temperature alloy seamless steel tubes are manufactured using high-quality carbon and alloy steel materials. These tubes have a seamless construction, ensuring uniformity, strength, and integrity. They are available in various sizes and dimensions to suit specific application requirements in low temperature environments.
Product Parameters:
| Parameter | Value |
|---|---|
| Outer Diameter | 10mm - 219mm |
| Wall Thickness | 1mm - 30mm |
| Length | Fixed or random |
| Steel Grade | Q345D |
| Delivery Condition | Normalized or Tempered |
Mechanical Properties:
| Mechanical Property | Value |
|---|---|
| Yield Strength | ≥345 MPa |
| Tensile Strength | 470-630 MPa |
| Elongation | ≥21% |
| Impact Toughness | ≥47J (at -20°C) |
Chemical Composition:
| Element | Content |
|---|---|
| Carbon (C) | 0.18% - 0.20% |
| Silicon (Si) | 0.20% - 0.50% |
| Manganese (Mn) | 1.70% - 2.00% |
| Phosphorus (P) | ≤0.015% |
| Sulfur (S) | ≤0.015% |
| Chromium (Cr) | ≤0.30% |
| Nickel (Ni) | ≤0.30% |
| Copper (Cu) | ≤0.25% |
Product Applications:
GB/T6479 Q345D low temperature alloy seamless steel tubes find application in various industries and sectors, including:
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Oil and Gas Industry: These tubes are used for low temperature transportation of oil, gas, and other hydrocarbon fluids in offshore and onshore environments.
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Petrochemical Industry: They are utilized in low temperature processes involving the production, refining, and storage of petrochemical products.
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Power Generation: Q345D seamless steel tubes are suitable for low temperature applications in power plants, including cooling systems, boiler tubes, and steam piping.
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Chemical Industry: These tubes are used in chemical processing plants for the transport of corrosive chemicals and fluids at low temperatures.
Product Advantages:
GB/T6479 Q345D low temperature alloy seamless steel tubes offer several advantages, including:
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Low Temperature Performance: These tubes are specifically designed to withstand low temperatures and exhibit excellent toughness and ductility, ensuring reliable performance in extreme conditions.
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High Strength: Q345D steel tubes have high tensile strength and good impact resistance, making them suitable for applications that require reliable and durable performance in low temperature environments.
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Corrosion Resistance: The alloy composition of these tubes provides enhanced corrosion resistance, ensuring they can withstand the corrosive effects of various fluids and environments.
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Wide Range of Sizes: GB/T6479 Q345D seamless steel tubes are available in various sizes and dimensions, providing flexibility and options to meet different design and application requirements.
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