20# / C22 Carbon Steel Tube Description
Carbon steel 20# (Grade 20 carbon steel) is a widely used low-carbon steel under the Chinese GB/T 699 standard. It offers a balanced combination of strength, ductility, and machinability, making it suitable for a variety of industrial applications.
Product Parameters
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Product Name
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Carbon Steel Tube 20#
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Standard
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ASTM: Similar to A283 Grade C or AISI 1020
DIN: Comparable to St37-2
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Outer Diameter
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Seamless: 1/4"-36"
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Welding: 21.3mm-3620mm
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Round Tube: 1/2"-10"
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Square Tube/Rectangular Tube: 15x15mm-400x600mm
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Wall Thickness
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Seamless: 1.25mm-50mm
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Welding: 1.65mm-65mm
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Length
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3-12 meters, Support customization
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Surface Process
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Bright, Polished, Black
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Other Services
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Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.
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Chemical Composition
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C
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Si
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Mn
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P
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S
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0.17-0.23
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0.17-0.37
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0.35-0.65
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≤ 0.035
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≤ 0.035
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International Trademark Comparison Table
| AISI/SAE |
ISO |
DIN |
BS
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NF
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JIS
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S
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| 1020 |
C22 |
CK22
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IC22
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C22/C20
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S20C/S22C
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≤ 0.035
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Mechanical Properties
| Tensile Strength |
≥410 MPa |
| Yield Strength |
≥245 MPa |
| Elongation |
≥25% |
| Hardness |
≤156 HB (annealed condition) |
Scope of Application
● Structural components (brackets, frames). ● Piping systems and hydraulic cylinders.
● Machinery parts (shafts, gears, bolts). ● Automotive and agricultural equipment.