Black Steel Tube
Black steel tube is a name for square tubes and rectangular tubes, that is, steel tubes with equal and unequal side lengths. It is made by rolling steel strips through processing. Generally, the steel strips are unpacked, flattened, rolled, and welded to form round tubes, which are then rolled into square tubes and cut into required lengths.
Black steel tube is a name for square tubes and rectangular tubes, that is, steel tubes with equal and unequal side lengths. It is made by rolling steel strips through processing. Generally, the steel strips are unpacked, flattened, rolled, and welded to form round tubes, which are then rolled into square tubes and cut into required lengths.
Common materials and characteristics
Features: low cost, high strength, good processing performance, it is the most commonly used material for square tubes.
Common grades: Q195, Q235, Q345, etc.
Application areas: building structures, machinery manufacturing, guardrails, etc.
Low alloy steel
Features: adding a small amount of alloy elements to carbon steel to enhance strength and toughness.
Common grades: Q345B, Q390, etc.
Applications: bridges, ships, heavy machinery, etc.
Aluminum alloy
Features: light weight, corrosion resistance, good thermal conductivity, but relatively low strength.
Common grades: 6061, 6063, etc.
Applications: aerospace, automobile manufacturing, decoration engineering, etc.
Galvanized steel
Features: zinc is plated on the surface of carbon steel to enhance corrosion resistance.
Common uses
Grades: Q235 galvanized, Q345 galvanized, etc.
Applications: outdoor structures, guardrails, pipelines, etc.
Other materials
Titanium alloy: high strength, corrosion resistance, used in aerospace and chemical equipment.
Nickel alloy: resistant to high temperatures and corrosion, used in special industrial environments.
|
Product Name |
Black steel tube |
|
Standard |
ASTM, GB 5310-1995, GB/T 8162-1999, BS EN 10025, JIS, JIS G 3459-2004, DIN |
|
Material |
10#, 20#, 16mn, A53(A,B), API J55, Q235, Q345, Q195, Q215, Q345C, Q345A, |
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Surface Treatment |
Black painting, Galvanized, Oiled, powder coating |
|
Length |
5.8mm-12mm |
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Thickness |
1mm-25mm |
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Size |
15×15mm-600×600mm |
Material selection considerations
- Strength requirements: Select appropriate materials based on load-bearing capacity, force distribution, etc.
- Corrosion resistance: In environments with high humidity or corrosive substances, stainless steel or galvanized steel should be preferred.
- Cost budget: Carbon steel has the lowest cost, while stainless steel and alloy steel are more expensive.
- Processing performance: Carbon steel and aluminum alloys are easy to process, while stainless steel and titanium alloys are more difficult to process.
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