Basic Information
Q355NF steel plate
"Q" stands for yield strength;
"355" indicates that the yield strength value is 355MPa;
"N" means delivery in normalized state;
"F" implies that the impact test temperature is -60℃, that is, the steel plate can maintain good performance in extremely cold environments.
Chemical Composition
| Element | Symbol | Content Range | Function/Note |
|---|---|---|---|
| Carbon | C | 0.1% - 0.2% | Moderate content, improves strength and hardness. |
| Manganese | Mn | 1.0% - 1.6% | Increases toughness and strength. |
| Silicon | Si | - | One of the main components (specific range not specified). |
| Phosphorus | P | ≤0.020% | Harmful element; strictly controlled to prevent cold brittleness. |
| Sulfur | S | ≤0.01% | Harmful element; strictly controlled to prevent hot brittleness. |
| Niobium | Nb | Trace amounts | Microelement added to refine grains, further improving strength and toughness. |
| Vanadium | V | Trace amounts | Microelement added to refine grains, further improving strength and toughness. |
| Titanium | Ti | Trace amounts | Microelement added to refine grains, further improving strength and toughness. |
| Iron | Fe | - | Matrix element (main component, specific content not specified). |
Mechanical Properties
Yield strength: Not less than 355MPa.
Tensile strength: Ranging from 470 to 630MPa.
Elongation after fracture: Not less than 22%.
Low-temperature impact toughness: Excellent; maintains stable performance at -60℃.
Applicability: Suitable for harsh environments and scenarios with high-strength requirements.
Manufacturing Process
Key steps: Converter smelting, LF refining, VD vacuum degassing, continuous casting, rolling.
Process control: Strict control ensures uniform chemical composition, fine structure, and stable performance.
Post-treatment: Normalizing treatment is required to eliminate internal stress, improve structural uniformity, and enhance toughness.
Application Scenarios
Construction field: Used in building structures such as bridges, high-rise buildings, and large industrial plants.
Machinery manufacturing field: Applied to manufacture mechanical components bearing heavy loads and used in harsh environments (e.g., mining machinery, port machinery).
Shipbuilding: Used to produce components like hull structures, decks, and bulkheads.
To sum up, Q355NF steel plate, with its unique properties and wide applications, has become an indispensable type of steel in modern industry.
Q355NF Steel Plate Dimensions Introduction [Thickness*Width*Length / Unit: mm]
Q355NF steel plate: 8*2000-2200*12000
Q355NF steel plate: 10*2300*12000
Q355NF steel plate: 12*2200-2500*10000
Q355NF steel plate: 20*1800-2000*7000-8000
Q355NF steel plate: 25*2000-2500*7000-10000
Q355NF steel plate: 30*2000-2500*7000-10000
Q355NF steel plate: 40*2000-2500*7000-8000
Q355NF steel plate: 50*2000-2500*8000-12000
Q355NF steel plate: 60*2000-2500*4000-12000
Q355NF steel plate: 70*2000-2500*8000-12000
Custom cutting according to drawings or small-batch futures orders for Q355NF steel plate can be negotiated.
