Hot-rolled steel plate is made of slab (mainly continuous casting slab) as raw material, and is made into strip steel by rough rolling unit and finishing rolling unit after heating. The hot steel strip coming out of the last rolling mill of finishing rolling is cooled to the set temperature by laminar flow, and rolled into steel strip coils by the coiler. The cooled steel strip coils undergo different finishing operations according to different needs of users. Wire (leveling, straightening, cross-cutting or slitting, inspection, weighing, packaging and marking, etc.) processed into steel plate, flat coil and slitting steel strip products. Due to the high strength, good toughness, easy processing and good weldability of hot-rolled steel products, they are widely used in manufacturing industries such as ships, automobiles, bridges, construction, machinery, and pressure vessels.
With the increasing maturity of new control technologies such as hot-rolled dimensional accuracy, plate shape, and surface quality, and the continuous emergence of new products, hot-rolled steel sheets and strip products have been more and more widely used and are widely used in the market.
main products:
Hot-rolled steel plates can be divided into ordinary carbon structural steel, low-alloy steel, and alloy steel according to their materials and properties.
According to different uses, it can be divided into: steel for cold forming, structural steel, automotive structural steel, corrosion-resistant structural steel, mechanical structural steel, steel for welding gas cylinders and pressure vessels, steel for pipelines, etc.
General instructions:
Hot-rolled steel plate products have a wide variety of steel grades and specifications, and are widely used, ranging from general engineering structures to the manufacture of automobiles, bridges, ships, boilers, and pressure vessels. Various uses have different requirements for the material properties, surface quality, size, and shape accuracy of steel plates. Therefore, it is necessary to understand the varieties, materials, characteristics and uses of hot-rolled steel plate products in order to achieve economical , Reasonable use.
type | Chinese enterprise standard | fairly international standard | illustrate | ||
Standard | Grade | Standard | Grade | ||
Hot rolled low carbon steel | Q/BQB 302 | SPHC | JIS G3131 | SPHC | Suitable for the manufacture of cold-formed parts. |
SPHD | SPHD | ||||
SPHE | SPHE | ||||
StW22 | DIN 1614 | StW22 (DD11) | |||
StW23 | (EN10111) | STW23 (DD12) | |||
StW24 | StW24 (DD13) | ||||
general structural steel | Q/BQB 303 | SS 330 | JIS G3101 | SS 330 | It is used for general structural parts such as buildings, bridges, ships, and vehicles. |
SS400 | SS400 | ||||
SS 490 | SS 490 | ||||
SS 540 | SS 540 | ||||
St 33 | DIN 17100 | St 33 (S185) | |||
St 37-2 | (EN10025) | St 37-2 (S235JR) | |||
St 37-3 | St 37-3 (S235JO) | ||||
St 44-2 | St 44-2 (S275JR) | ||||
St 50-2 | St 50-2 (E295) | ||||
St 52-3 | St 52-3 (S355JO) | ||||
steel for welded structures | Q/BQB 303 | SM400A | JIS G3106 | SM400A | It is used for structural parts requiring excellent welding performance, such as buildings, bridges, ships, vehicles, oil tanks, and engineering machinery. |
SM400B | SM400B | ||||
SM400C | SM400C | ||||
SM490A | SM490A | ||||
SM490B | SM490B | ||||
SM490C | SM490C | ||||
SM490YA | SM490YA | ||||
SM490YB | SM490YB | ||||
SM520B | SM520B | ||||
SM520C | SM520C | ||||
B520JJ | --- | --- | Concrete mixer truck cylinder with hot rolled steel plate. | ||
Welten590RE | NSC | Welten590RE | Weldable high-strength steel plates are used for pressure vessels, oil tanks, construction machinery, mining machinery, pressure water pipes, etc. | ||
B590GJA | --- | --- | |||
B590GJB | |||||
Mechanical structural steel | Q/BQB 303 | C22 | DIN 17200 | C22 | It is used for mechanical structural parts after cutting and other processing and heat treatment. |
C35 | JIS G4501 | C35 | |||
S20C | S20C | ||||
S35C | S35C | ||||
Fine Grain Structural Steel | --- | StE255 | DIN 17102 | StE255 | Fine grained structural steel suitable for welding. |
StE355 | StE355 | ||||
steel strip for steel pipe | Q/BQB 303 | SPHT1 | JIS G3132 | SPHT1 | For welding steel pipes. |
SPHT2 | SPHT2 | ||||
SPHT3 | SPHT3 | ||||
Automotive Structural Steel | Q/BQB 310 | SAPH 310 | JIS G3113 | SAPH 310 | Used for automotive structural parts such as automotive frames and wheels that require formability. |
BZJ 311 | SAPH 370 | SAPH 370 | |||
BZJ 312 | SAPH 400 | SAPH 400 | |||
BZJ 313 | SAPH 440 | SAPH 440 | |||
BZJ 314 | QStE 340TM | SEW 092 | QStE 340TM (---) | Hot-rolled granular steel for cold deformation, used for structural parts such as automobile beams that require good cold forming performance and high or high strength requirements. | |
QStE 380TM | (EN10149-2) | QStE 380TM (---) | |||
QStE 420TM | QStE 420TM (S420MC) | ||||
QStE 460TM | QStE 460TM (S460MC) | ||||
QStE 500TM | QStE 500TM (S500MC) | ||||
B330CL | --- | --- | It has good cold forming performance, and is used for wheel mesh and spokes of automobile rolling wheels. | ||
B380CL | |||||
B420CL | |||||
B440QZr | --- | --- | It is used in the manufacture of automobile transmission shafts. | ||
B480QZR | |||||
B320L B550L | --- | --- | Used for automobile girders and beams. | ||
B510L B420L | |||||
B510DL | |||||
Boiler and pressure vessel steel | Q/BQB 320 | HII | DIN 17155 (EN10028-2) | HII (P265GH) | In addition to ensuring normal temperature performance, it also guarantees mechanical properties at higher temperatures, and is suitable for steam boiler equipment, pressure vessels with higher working temperatures and similar structural parts. |
19Mn6 | 19Mn6 (P355GH) | ||||
Q/BQB 320 | SB410 | JIS G3103 | SB410 | ||
Q/BQB 321 | B440HP | JIS G3116 | SG295 | Steel plates for welding gas cylinders. | |
B490HP | SG325 | ||||
steel for hull structure | Q/BQB 330 | A | LR,BV | A | It can be supplied according to the specifications of the classification societies of various countries. |
B | GL, DNV | B | |||
D. | ABS | D. | |||
Atmospheric corrosion resistant steel | Q/BQB 340 | WTSt37-2 | SEW087 (EN10155) | WTSt37-2 (S235J2W) | It is used to manufacture interception and fuel for structural parts such as containers, railway vehicles, oil derricks, and construction machinery that require atmospheric corrosion resistance. |
WTSt52-3 | WTSt52-3 (S355J2G1W) | ||||
NAW 400 | NSC | NAW 400 | |||
NAW 490 | NAW 490 | ||||
B460NQR | --- | --- | |||
B490NQR | |||||
Sulfuric acid corrosion resistant steel | S-ten2 | NSC | S-ten2 | Used in the manufacture of containers for hydrogen sulfide-containing media, etc. | |
seawater corrosion resistant steel | Mariloy G41A | Mariloy G41A | Used for structural components such as oil production platforms, ships, and harbor buildings. | ||
Mariloy S50A | Mariloy S50A | ||||
high weather resistance | BZJ342 | B480GNQR | --- | --- | Used in the manufacture of vehicles, containers, construction and |
structural steel | other structural parts. | ||||
Through-thickness properties of hot rolled steel sheets | Q/BQB 350 | Z15 | --- | --- | The thickness direction performance of the steel plate has good lamellar tear resistance performance, and is used for offshore oil production platforms and other structural parts that require thickness performance. |
Z25 | |||||
Z35 | |||||
case hardened steel | Q/BQB 360 | C10 | DIN 17210 | C10 | High-purity low-carbon steel is used for surface carburizing or nitriding followed by quench hardening to manufacture structural parts with high hardness and wear resistance on the surface and high toughness on the core. |
C15 | C15 | ||||
S09CK | JIS G4051 | S09CK | |||
S15CK | S15CK | ||||
High toughness pipeline steel | BZJ 371 | X60RL | API 5L | X60 | High-toughness pipeline steel hot-rolled wide-band steel for spiral welding production of oil pipelines |
X70RL | X70 | ||||
straight seam welding | BZJ 372 | J55 | API 5CT | J55 | For the manufacture of straight seam welded oil casing |
Steel for casing | |||||
Tread plate | BZJ 390 | BCP 270 | --- | --- | Lentil shaped checkered steel plate |
BCP 340 | |||||
BCP 400 | |||||
Hot continuous rolled wide steel for bicycles | BZJ 304 | SPHT1Z,SPHT2Z | --- | --- | Used in the manufacture of bicycle upper, lower, rear joints, front wishbones, front faceplates, chain rolling handlebar cross tubes, center shafts and other parts |
SPHT3Z, SPHDZ | |||||
SM50BZ,SM53BZ | |||||
For pipeline | GB14164 | S205,S240 | API 5L | Grade A,B | Oil and natural gas pipeline |
hot rolled coil | S315 | X42,X46,X52 | |||
S290,S360,S385 | X56,X60,X65 | ||||
S415,S450,S480 | X70 |


The hot-rolled steel plate products produced by Zhengde have excellent properties such as high strength, good toughness, easy processing and good weldability, so they are widely used in manufacturing industries such as ships, automobiles, bridges, construction, machinery, and pressure vessels.
Spot inventory of steel plates with various material properties: ordinary carbon structural steel plates, low alloy steel plates, alloy steel plates, wear-resistant steel plates, steel plates for cold forming, structural steel plates, automotive structural steel plates, steel plates for corrosion-resistant structures, mechanical structures Steel plates, steel plates for welded gas cylinders and pressure vessels, steel plates for pipelines, etc.


The surface quality is good. Compared with ordinary hot-rolled sheets, Zhengde hot-rolled sheets have removed the surface oxide scale, improved the surface quality of steel, and are convenient for welding, oiling and painting.
The dimensional accuracy is high, and after leveling, the plate shape can be changed to a certain extent, thereby reducing the deviation of unevenness. Improved surface finish for enhanced appearance
Relying on Zhengde's sufficient steel plate resources, it reduces the pressure on customers' inventory. It can be cut according to drawings, or directly cut into graphics required by customers, such as circles, rectangles, flanges, bearing housings, rolling mill racks, and rolling mill arches, etc. The cutting precision is high. , the incision is smooth and tidy, and the machining allowance is small.



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.
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.