P355NH cold-rolled steel plate is one of the European standards (EN10028-3), and its chemical composition is mainly C, Si, Mn, P, S and other elements. Among them, the content of C (carbon) element is 0.18%~0.28%, the content of Si (silicon) element is ≤0.50%, the content of Mn (manganese) element is 1.20%~1.60%, and the content of P (phosphorus) element is ≤0.020%, the content of S (sulfur) element is ≤0.010%. In addition, P355NH cold-rolled steel plate also contains a small amount of trace elements such as Al and Ti, which help to improve the corrosion resistance of the steel plate. MPa. At the same time, its elongation after fracture and reduction of area are high, and it has good plasticity and toughness, which can meet various machining and forming requirements.
P355NH cold-rolled steel plate has good cold-formability and weldability. Its cold bending forming ability is good, which can meet the requirements of general cold bending forming; at the same time, its welding performance is excellent, and it is easy to carry out welding processing.
Corrosion resistance
P355NH cold-rolled steel plate has excellent corrosion resistance through special smelting process and alloy composition design. At room temperature, its atmospheric corrosion resistance is equivalent to that of 16MnR steel plate, while under high temperature environment, its corrosion resistance is better than that of 16MnR steel plate. In addition, P355NH cold-rolled steel plate also has good alkali corrosion resistance and seawater corrosion resistance.
Process performance
The heat treatment process of P355NH cold-rolled steel plate is crucial to obtain the best mechanical properties and corrosion resistance. Generally, P355NH cold-rolled steel sheets are normalized and tempered to obtain the proper combination of strength and toughness. In addition, in order to improve the corrosion resistance of the steel plate, it can also be galvanized or aluminum-plated.
P355NH cold-rolled steel plate requires several quality inspections during the manufacturing process to ensure that it meets the specified requirements. These tests include chemical composition analysis, mechanical performance test, ultrasonic testing, magnetic particle testing, ray testing, etc. Through these quality assurance measures, the stable performance and quality of P355NH steel plates can be ensured.
3. Application
P355NH cold-rolled steel plate is widely used in various boiler pressure vessels, petrochemical equipment, ships, mining machinery and other fields. Its main uses include: making boiler pressure vessel shells, reactors, towers, etc.; used in the manufacture of petrochemical equipment, such as heat exchangers, reactors, etc.; used in corrosion-resistant structural parts in shipbuilding; used in mines Wear-resistant parts and corrosion-resistant parts in machinery, etc.
Zhengde Cold rolled steel plate is the abbreviation for ordinary carbon structural steel cold rolled plate, also known as cold rolled plate. Cold rolled steel plates are hot-rolled steel strips of ordinary carbon structural steel, which are further cold rolled to produce steel plates with a thickness of less than 4mm. Due to the fact that rolling at room temperature does not produce oxide scale, the cold plate has good surface quality and high dimensional accuracy. In addition, annealing treatment results in better mechanical and technological properties than hot-rolled thin steel plates. In many fields, especially in the field of home appliance manufacturing, it has gradually been used to replace hot-rolled thin steel plates.
| Usually available specification range |
| Variety |
thickness |
width |
length(or coil inner diameter) |
| steel plate |
trimming |
0.30~3.5 |
900~1830 |
1000~6000 |
| No trimming |
900~1850 |
| steel belt |
trimming |
0.30~3.5 |
900~1830 |
610(the inside diameter of) |
| No trimming |
900~1850 |
| Slitting steel strip |
0.30~3.5 |
120~<900 |
| Technical Standards for cold rolled steel coil |
| grade |
Zhengde enterprise standard |
Comparable to foreign standards |
illustrate |
| Standard |
Grade |
Standard |
Grade |
| general use |
Q/BQB403 Q/BQB402 |
St12 SPCC |
DIN1623JISG3141 |
St12 SPCC |
For general forming processing such as refrigerators and other home appliance shells, oil barrels, and steel furniture. |
| stamping grade |
Q/BQB403 Q/BQB402 |
St13 SPCD |
DIN1623JISG3141 |
St13 SPCD |
Steel for stamping and forming processes such as automobiles, home appliances, and construction. |
| Deep drawing |
Q/BQB403 Q/BQB402 |
St14, (F, HF, ZF)SPCE (F, HF, ZF) |
DIN1623JISG3141 |
St13 SPCE |
Automobile headlights, fuel tanks, car doors, windows and other steels for deep drawing and forming. |
| Steel for extra deep drawing |
Q/BQB403 |
St15 St14T |
|
|
Car headlights, complex underbody panels, oil pans. |
| hard steel |
Q/BQB402 |
SPCC4D SPCC8D SPCC1D |
JISG3141 |
1/4 hard1/8hard |
Steel for bicycle rims and steel for stationery. |
| structural steel |
Q/BQB410 BZJ410 |
St37-2G St44-3G St52-3G |
DIN1623 |
St37-2G St44-3G St52-3G |
Buildings, car bodies, brackets. |
| Atmospheric resistant steel |
BZJ441 |
B440NQ B450NQ B460NQ B500NQ |
|
|
Automobile, train car outer panels, container panels, doors and windows, cold-formed steel and other components. |
| steel for car wheels |
BZJ412 |
B320LW B360LW |
|
|
Steel for automotive wheel rims. |
Our Advantages
High precision
Cold-rolled high-quality thin steel plate: mainly includes various high-quality steel cold-rolled thin plates, the most commonly used is carbon structural steel plate, especially cold-rolled thin steel plate for deep drawing, which is cold-rolled thin plate made of low-carbon high-quality steel 08Al. The quality is divided into three groups;1 ,2 and 3, which represent particularly high-grade, high-grade, and higher-finish surfaces, respectively.
Extensive use
Cold-rolled steel plate with smooth surface and excellent processing, used for home appliances such as automobiles, refrigerators, washing machines, industrial equipment, and various building materials. With the development of the economy, cold-rolled steel sheets have been called necessary materials in modern society. Classification of cold-rolled products: hot-rolled pickling, hard-rolled coil, ordinary cold-rolled, galvanized (electro-galvanized, anti-fingerprint, hot-dip galvanized), galvanized, electro-tinned, color-coated, electrical steel (silicon steel sheet) wait.
Strict craftsmanship
Cold rolled steel coils generally use hot-rolled strip steel with a thickness of 1.5-6 mm as the cold rolled billet. The main processes include pickling, cold rolling, degreasing, annealing, leveling, and shearing (cross cutting, longitudinal cutting). If producing coated plates, there are also plating or coating processes such as electroplating tin, hot tin coating, and hot zinc coating. The production process of cold rolled billets is as follows: hot rolled sheet coils (raw materials) - acid washing - cold rolling - degreasing - annealing - leveling - shearing - finished product delivery.
Provide deep processing
The company's slitting machine, slitting line, cuts cold rolled steel coils into strips of various widths as needed, and then folds the strips into small coils for use in the next process. It is a necessary equipment for precision cutting of transformers, motor industries, and other metal strips. It is mainly used for strip cutting of materials such as tinplate, galvanized iron, silicon steel sheet, cold rolled strip, stainless steel strip, aluminum strip, steel strip, and other coils.
Quality first: production and inspection in strict accordance with production standards;
Price advantage: discounts based on real market prices;
Transaction security: There will be no loss of customer funds;
After-sales guarantee: the customer's problem is our problem;
Long-term cooperation: quality assurance, price advantage, sincere service can last for a long time.
Detailed Photos
Packaging & Shipping
Company Profile
Shandong Zhengde Metal Manufacturing Co., Ltd. is a production and sales company integrating hot-rolled steel coils, cold-rolled steel coils, galvanized steel coils, color-coated steel coils, section steel, steel pipes, steel wires, metal mesh, stainless steel, aluminum, copper and other metal products integrated large enterprises. Five production and sales bases have been formed in Binzhou, Liaocheng, Wuxi, Tianjin, Jinan and Tai'an, with more than 100 production lines, 4 nationally recognized laboratories, 2 technical engineering centers, and 5 enterprise technology centers. Products are exported to more than 50 countries and regions such as North America, South America, Europe, Africa, Oceania, Middle East, and Southeast Asia.
Certifications
Audited Supplier 
){kind=link}
){kind=link}