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Product Description

Carbon Steel Tube 20#

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

Product Name

Carbon Steel Tube 20#

Standard

ASTM: Similar to A283 Grade C or AISI 1020

DIN: Comparable to St37-2

Outer Diameter

Seamless: 1/4"-36"

Welding: 21.3mm-3620mm

Round Tube: 1/2"-10"

Square Tube/Rectangular Tube: 15x15mm-400x600mm

Wall Thickness

Seamless: 1.25mm-50mm

Welding: 1.65mm-65mm

Length

3-12 meters, Support customization

Surface Process

Bright, Polished, Black

Other Services

Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

 

Chemical Composition

C

Si

Mn

P

S

0.17-0.23

0.17-0.37

0.35-0.65

≤ 0.035

≤ 0.035

 

International Trademark Comparison Table

AISI/SAE ISO DIN

BS

NF

JIS

S

1020 C22

CK22

IC22

C22/C20

S20C/S22C

≤ 0.035

 

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.

 

Product Application

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Packaging and shipping

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Factory Display

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FAQ

Q1: What products does Jiuhe Steel mainly offer?
Jiuhe Steel specializes in carbon steel, stainless steel, copper, aluminum, color-coated and galvanized products. Our portfolio includes carbon steel coils/plates/pipes/sections, stainless steel coils/pipes/bars, copper plates/strips/pipes, aluminum plates/coils/profiles, pre-painted galvanized coils/roofing sheets, and galvanized coils/pipes/sections.


Q2: What standards do your products comply with?
We can supply products in accordance with various international standards, including GB/T (Chinese standard), ASTM (American standard), JIS (Japanese standard), EN (European standard), and others. We recommend that clients specify their required standards and grades, and we will arrange production accordingly. If you are unsure about the appropriate standard, our team can assist with standard comparison and material selection.


Q3: Do you offer customized products?
Yes. We provide customized steel and non-ferrous metal solutions based on specific project requirements, including special dimensions, materials, surface treatments, and more. Please send us your technical specifications or drawings, and we will offer professional advice and quotations.

 

Q4: How do you ensure product quality?
We maintain long-term partnerships with reputable domestic mills and processing plants, with strict quality control systems in place. All products are accompanied by quality inspection certificates issued by the manufacturer. Upon request, we can also arrange third-party inspection by agencies such as SGS or BV.


Q5: Do you provide Mill Test Certificates (MTC)?
Yes. We provide Mill Test Certificates (MTC) for each shipment, including product name, specifications, applicable standards, chemical composition, mechanical properties, test results, date of manufacture, and the manufacturer‘s official stamp.

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