Chinese 
Q355B Hot Rolled Steel Coil | GB Low Alloy High Strength Hot Rolled Coil
- High yield strength, excellent bearing capacity for heavy-load engineering
- Good toughness and weldability, convenient for complex structural fabrication
- Strict GB standard compliance, stable chemical & mechanical performance
- Multiple processing options: slitting, flattening, fixed length cutting
- Complete inspection documents, large stock to support bulk export orders
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Product Overview
Q355B Hot Rolled Steel Coil is widely used low alloy high strength structural hot rolled steel under Chinese GB specification. It replaces the old Q345B grade and is well recognized by global engineering buyers. Produced via continuous high temperature hot rolling process, the material owns fine and uniform internal grain structure, balancing high strength and good ductility.
Q355B features reliable mechanical performance and good welding property. It has room temperature impact test requirement, suitable for most heavy-load structural projects. This grade is extensively applied in steel structure buildings, bridge components, engineering machinery frames, truck chassis, heavy support brackets and large equipment bases.
Our factory supplies full size range Q355B hot rolled coil. Secondary processing including slitting into narrow strips, flattening and cutting to custom plate sizes is available.
Chemical & Mechanical Property Snapshot
Detailed Technical Specifications
Product Comparison Table
App Market
Reliable Steel Coil Solutions For Diverse Industrial Applications
Steel Structure Processing
Container Frame
1Pressing parts
Agricultural machinery parts
Pipe manufacturing
Tower support structure
1 Mechanical base
Guardrail enclosure
Scaffolding materials
Product Packaging
Secure Export Packaging For Safe Handling And Delivery
FAQs
Q355B hot rolled coil is used for heavy steel structures, bridge parts, construction frames, machinery chassis and heavy support components.
Q355B follows GB/T709 standard, it is the upgraded grade of old Q345B.
Q355B has much higher yield strength, designed for heavy load structures; Q235B is mild carbon steel for light and medium load projects.
1. Yes, slitting, flattening and custom cut-to-length service can be offered as per buyer’s drawing.
Yes, Q355B has good weldability, widely adopted in welded structural engineering.
Yes, MTC 3.1 or 3.2 certificates can be provided for each batch for inspection and customs clearance.
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