Name: Q355B Carbon Steel Bar
SKU: 0

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Q355B Carbon Steel Bar

Q355B carbon steel bar is low-alloy high-strength structural round steel. It has higher yield strength than ordinary Q235B, with good toughness and weldability. Designed for heavy-load scenarios, widely used for lifting equipment, vehicle chassis and load-bearing structural components. Hot rolled round, square and flat bar available for global heavy machinery manufacturers.

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Product Parameters

Feature	Details
Low Alloy High Strength Grade	GB/T1591 certified, minimum 355MPa yield strength for heavy load service
High Strength-to-Weight Ratio	Higher bearing capacity than Q235B, reduces structural section weight
Good Toughness & Weldability	Stable impact performance at 20℃, easy welding and machining
Multiple Profile Options	Hot rolled round bar, square bar, flat bar
Complete Export Documentation	MTC mill test certificate, ISO9001, third-party inspection available
Main Applications	Lifting & crane equipment structural parts, support legs and load-bearing pins Construction machinery, truck / trailer chassis and vehicle frame blanks Heavy load support frames, equipment bases and engineering structural components Mining machinery parts and large welded structural assemblies Wind power support and heavy steel structure fabrication

Item	Specification
Product Name	Q355B Low Alloy High Strength Steel Bar
Executive Standard	GB/T 1591
Grade	Q355B
Minimum Yield Strength (≤16mm)	≥355MPa
Tensile Strength	470–630MPa
Size Range	12mm – 320mm diameter / section
Length	6m standard, custom cut-to-length available
Surface Treatment	Hot rolled black finish, anti-rust oil coated
Equivalent Grades	EN S355JR, S355J2
Certificates	MTC, ISO9001, SGS Third-Party Inspection
Packing	Seaworthy export bundled packing with steel strapping

Q355B low alloy high strength bar is designed for heavy-load structural use with 20℃ impact test. It outperforms regular carbon steel bars for heavy machinery and chassis fabrication. Not suitable for high temperature boiler or precision quenching applications. We maintain spot inventory and support custom cutting for machinery OEM and heavy structure bulk orders.

Contact us now and send us your required bar diameter, shape, length and load condition. Get heavy-duty steel solution & factory wholesale price within 24 hours.

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FAQ

1.What kind of customer service do you provide?

We provide comprehensive customer service, including basic design, procurement of supporting facilities, and options for dispatching installation guides.

2.What are the customer evaluations of your company?

We are proud to consistently receive five-star reviews from our customers, which demonstrates our commitment to quality and service.

3.What is your quality inspection process like?

Our strict quality inspection process ensures that every product meets the highest standards of excellence. From raw materials to finished products, every stage is carefully inspected to ensure excellent quality.

4.Do you accept container loading inspection?

Welcome to dispatch inspectors, not only for container loading, but also at any time during production.

5.What is the delivery time?

The delivery time depends on the quantity of orders. Usually, the delivery time to the nearest port in China is 15-30 days after receiving the deposit.

6. How to obtain a project quotation?

You can contact us 24 * 7 via email, phone, WhatsApp, WeChat, etc. You will receive a reply within 4 hours.