Q355 hot-rolled steel plate is a type of low-alloy high-strength structural steel plate

INTRODUCTION

Q355 hot-rolled steel plate is a type of low-alloy high-strength structural steel plate that offers exceptional mechanical properties. The "Q" in its designation stands for "Qufu" (in Chinese pinyin), indicating its yield strength, while "355" signifies a minimum yield strength of 355 MPa. This steel plate is produced through hot-rolling processes, resulting in a material that is both strong and ductile.

APPLICATION

Q355 hot-rolled steel plate finds wide applications across various industries due to its robust properties. It is commonly used in:

Shipbuilding: Where it can withstand the complex stress environments and ensure structural safety and stability.

Bridges: Due to its ability to carry large loads and endure harsh environmental conditions.

Machinery Manufacturing: In the production of heavy-duty machinery and equipment.

Energy: Such as in the construction of oil derricks, natural gas storage tanks, and other energy infrastructure.

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ADVANTAGES

High Strength: With a yield strength of 355 MPa and tensile strength ranging from 470 to 630 MPa, Q355 steel plate ensures structural integrity and stability.

Good Toughness: It maintains stable performance even in adverse working environments.

Corrosion Resistance: It exhibits excellent resistance to atmospheric and seawater corrosion, extending its service life.

Excellent Weldability: Q355 steel plate can be easily welded using various welding methods, and the weld seam maintains comparable strength and ductility to the base material.

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TREND AND PROSPECT

Increasing Demand: With the continued growth of industries such as shipbuilding, machinery manufacturing, and energy, the demand for Q355 hot-rolled steel plate is expected to increase.

Lightweighting Trends: In response to the trend of lightweighting in various industries, Q355 steel plate, with its high strength and relatively thin gauges, is well-suited for applications where weight reduction is crucial.

Technological Advancements: Continuous improvements in steel production technology will likely lead to enhanced properties and wider applications for Q355 steel plate.

INSPECTION STANDARD

The inspection standards for Q355 hot-rolled steel plate typically include:

Chemical Composition: Ensuring that the alloy elements such as carbon, manganese, silicon, vanadium, niobium, and titanium meet the specified requirements.

Mechanical Properties: Testing for yield strength, tensile strength, elongation, and impact toughness to ensure they comply with relevant standards.

Surface Quality: Inspecting for defects such as cracks, inclusions, and surface imperfections.

Dimensional Accuracy: Ensuring that the thickness, width, and length of the steel plate meet the specified tolerances.

In addition, specific industry standards or customer requirements may also govern the inspection process for Q355 hot-rolled steel plate.