SS400 Carbon Steel Pipe

SS400 carbon steel pipe is a carbon structural steel pipe produced in accordance with the Japanese standard JIS G3101, with material SS400, corresponding to the Chinese national standard Q235B. SS400 carbon steel pipe belongs to normal strength carbon steel, which is widely used in construction, machinery manufacturing, and other structural fields.

Core Characteristics:

• Material category: Ordinary carbon structural steel (moderate carbon content, balanced overall performance).
• Execution standard: JIS G3101 (Japanese Industrial Standard), tensile strength ≥ 400MPa.
• Equivalent national standard: Q235B (mechanical properties and chemical composition are similar, but differences in the standard system should be noted).

SS400 Carbon Steel Seamless Pipe for General Structure

Chemical Composition (Mass Percentage):

Carbon (C): 0.16 ~ 0.22%

Silicon (Si): ≤ 0.35%

Manganese (Mn): 1.40 ~ 1.75%

Sulfur (S): ≤ 0.05%

Phosphorus (P): ≤ 0.045%

Mechanical Properties:

Tensile Strength: 400～510 MPa

Yield Strength: ≥235 MPa (thickness ≤ 16 mm)

Elongation: 17～27% (adjusted according to the specimen pitch and thickness)

Manufacturing Process and Typical Applications:

Manufacturing Process:

Hot roll forming: Seamless or welded steel pipes are produced by a high-temperature rolling process, suitable for large-size structural parts.

Cold bending and welding: For thin-walled tubes to improve dimensional accuracy and surface quality.

SS400 Pipe Applications

 

GNEE SS400 Carbon Steel Pipe

 

SS400 Seamless steel carbon pipe

SS400 structural carbon pipe

SS400 hot rolled steel pipe

Advantages:

Low cost, excellent machinability (easy welding, cutting, and cold bending).

Combined strength and plasticity are well matched for general-purpose structural scenarios.

Limitations:

Poor corrosion resistance: a surface galvanizing or painting protection is needed, and direct use in wet/corrosive environments should be avoided.

Cold brittleness: the impact toughness decreases below 0°C; it is recommended to use higher-grade materials (e.g., Q345B) in cold areas.

FAQ

Q: Can we visit your factory?

A: Of course you can, we welcome you to visit our factory on the spot or to visit our production line via online video to understand our strengths and quality. We will arrange a professional team to serve you.

Q: How do you ensure the quality of your products?

A: All products must go through three inspections during the whole production process, including production, cutting, and packaging. A factory inspection report is provided with the goods. If necessary, third-party inspection, such as SGS, can also be accepted.

Q: How can I get samples? What is the cost?

A: Depending on the product specification, we will surely provide free samples or paid samples. You just need to provide us with your requirements.

Q: What is your delivery time?

A: There are different delivery times for different products and purchase quantities. Products will be delivered as soon as possible with quality assurance. If the goods are in stock, it usually takes 7-14 days. If the goods are out of stock or customized, it will take 25 to 45 days.

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