High grade hot-rolled steel plate(SS400)

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Tianjin
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300 m.t.
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20000 m.t./month

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1, carbon steel rimmed steel sheet (GB3274-88)

Steel rimmed steel sheet as the name suggests is made by boiling hot rolled steel plate made of ordinary carbon structural steel. Rimming steel deoxygenation is a complete steel, steel liquid oxygen content is higher, when molten steel after the injection mould, carbon oxygen reaction to produce large amounts of gas, resulting in liquid steel was named after boiling state. Rimming steel with low carbon content, and because no FeSi deoxidization, so steel containing silicon amount<0.07%. Boiling steel outer layer is crystallized in the boiling state, so the surface clean, compact, good surface quality, good processing performance. Rimming steel no large shrinkage hole, deoxidizer used less, low cost of steel. Rimming steel heart of impurities, with the serious segregation, mechanical heterogeneity, more gas in steel, low toughness, cold brittleness and aging sensitivity is larger, the welding performance is poor, so it does not apply to manufacturing under impact load, welding pieces of the structure and other important components work under low temperature.

Steel plate used in the manufacture of all kinds of stamping parts, construction and engineering structure and the structure of the machine is not too important and parts of boiling. The grade, chemical composition and mechanical properties of the material with GB700-79 (88) (technical specification for steel structure of ordinary carbon steel provisions boiling). Hot rolled thick steel plate with thickness of 4.5-200mm. Production units are mainly of Anshan Iron and steel company, Wuhan, Maanshan Iron and steel, TISCO, Chongqing steel, Handan iron and Steel General Factory, Xinyu steel, Liuzhou steel, Anyang steel company, Yingkou plate plant of Tianjin steel and etc..

2 killed steel, plain carbon steel (GB3274-88)

Ordinary carbon steel plate is made of ordinary carbon structural steel hot-rolled steel billet sedation. Deoxidation fully killed steel is steel, steel liquid deoxidation ferromanganese, ferrosilicon and full aluminum ingot casting liquid steel in front, more calm in the mould, does not produce the boiling state, so named for the killed steel. Advantages of killed steel is uniform chemical composition, so the mechanical properties of each part is uniform, the welding performance and good ductility, corrosion resistance is strong. But the surface of poor quality, concentrated shrinkage, higher cost.

Ordinary killed steel is mainly used for structural components, production impact at low temperature welding structure, and other requirements of high strength. The grade, chemical composition and mechanical properties of the material with GB700-79 (88) (technical conditions of steel carbon structure) provisions in killed steel. Size thickness of 4.5-200mm plate. Anshan Iron and steel company, Wuhan Iron and steel are the main production units, Wuyang Steel Corp, Maanshan Iron and steel, TISCO, Chongqing steel, Handan iron and Steel General Factory, Xinyu steel, Liuzhou steel, Anyang, Tianjin, Yingkou Steel Corp steel medium plate plant, a steel, three factory, Shaoguan iron and steel plant and Ji'nan iron and steel factory.

3, low alloy structural steel (GB3274-88)

Low alloy structural steel plate is made of hot rolled low alloy structural steel. Low alloy steel plate is killed steel and semi killed steel sheet. The utility model has the advantages of high strength, good performance, can save large amounts of steel, reduce the structure weight etc.. Low alloy structural steel is more and more widely used in machinery manufacturing and metal structural parts. Thickness of hot rolled steel plate 4.5-200mm. The production unit including Anshan, Wuhan, Wuyang Steel Corp, Maanshan Iron and steel, Chongqing steel, Xinyu steel, Liuzhou steel, Kunming Steel Corp, Tianjin steel, Shaoguan steel plant, Anyang Steel Corp, a steel, three factory and taiyuan.

Steel plate hot rolling with 4, general structure (GB2517-81)

Mainly used for general structure of buildings, bridges, vehicles, etc.. Steel plate (belt) thickness from 1.2-13.0mm; width from 700-1550mm; the length from 2000-12000mm.

5, welded weathering steel with structure (GB4172-84)

Weathering steel is atmospheric corrosion resistant steel. Welding structure with weathering steel is adding small amount of alloying elements in steel, such as steel, chromium, nickel, molybdenum, niobium, titanium, zirconium and vanadium, which form a protective layer on the surface of a metal matrix, in order to improve the weathering steel, and good welding performance. Mainly used in bridges, buildings and other structures.

6, high weatherability, structural steel plates (GB4171-84)

Atmospheric corrosion resistance of weathering steel is economic. Adding small amount of alloying elements in steel, such as steel, phosphorus, chromium, nickel, molybdenum and niobium, titanium, zirconium and vanadium, the level of protection to improve the weathering resistance steel is formed on the surface of the metal substrate. Mainly applicable to buildings, vehicles, towers and other structures.

7, checkered steel plate (GB3277-82)

Pattern plate is the surface with diamond or lentil shaped rib plate. The specifications to the thickness (rib thickness excluding) said. The pattern plate is provided with antiskid effect, often used as a floor, workshop, working frame escalator pedal, the deck of a ship and car plate etc.. The pattern plate material with ordinary carbon structural steel B1, B2 and B3 grade steel rolling form, its chemical composition meet the GB700-79 (technical conditions of steel carbon structure) regulations. Production units are mainly the Anshan Iron and steel and Anyang Steel Corp.

Steel plate for 8, bridge (YB168-70)

The bridge plate is dedicated to the rack railway or highway bridge plate making. Load and impact requirements and has high strength, toughness and bear the locomotive and vehicle, and have good fatigue resistance, low temperature toughness of certain and atmospheric corrosion resistance. Tethered to the welding of bridge steel also has good welding performance and low notch sensitivity. The main structural element for a railway bridge and highway bridge span between 46-160mm. The specifications: thickness from 6-50mm, width, length from 1.0-2.4mm from 2.0-16mm. The production of bridges in China are mainly used steel Anshan, Wuhan steel, steel unit three factory and Chongqing steel etc..


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Q:How is the normalized steel plate produced?
Normalizing, also known as normalizing, is to heat the workpiece between 727 and 912 degrees Celsius. 40~60min, after a period of heat preservation, is removed from the furnace and cooled by air or by spray, spray, or blow cooling. Its purpose is to make grain refinement and carbide distribution homogenization, to remove the internal stress of materials.
Q:Should the carbon fiber reinforce the steel bar on the side of the beam?
Not necessarily, mainly depends on how the design is calculated, usually put 100~200mm carbon fiber layering
Q:Why can steel HPB300, steel plate without Q300, steel structure manuscript review, but also continued the Q235, why not improve it?
Carbon steel according to the steel yield strength is divided into 5 grades: Q195, Q215, Q235, Q255 and Q275 of each grade because the quality is divided into A, B, C, D grade, with a maximum of four kinds, some only one; this is just plain carbon steel, the price is cheap, generally not heat treatment. Only quality carbon steel has the value of heat treatment.
Q:Q195 galvanized steel plate, is it hot or cold?
Cold rolling mill for rolling power, low efficiency, and the rolling process in order to eliminate work hardening and annealing, so the cost is higher, but the cold rolled steel surface bright, good quality, can be directly used for processing products, it is ten points wide application of cold rolled steel plate.
Q:What type of welding rod is used for steel Q245R and Q235B material?
If the welding weld is non pressure parts, you can use the CO2 gas shielded arc welding, using 1.2 or 1.6 ER50-6 diameter wire welding, weld spatter if you need better or less, recommend the use of Ar:CO2 mixed gas 8:2 welding.
Q:Bathroom washing machine, galvanized steel and color steel which good?
The outer shell of a washing machine, even if it is a zinc plated steel sheet, usually adds a beautiful coating to the surface, equal to double protection
Q:What is hot and cold rolled steel plate? How to distinguish? What high hardness? Which will produce noisy eye?
By definition, ingot or billet is difficult to deform under normal temperature, easy processing, generally heated to 1100 to 1250 DEG C for rolling, the rolling process of hot rolled steel rolling. Most are called hot method. But because the surface under high temperature steel is easy to produce iron oxide, the surface roughness of hot rolled steel, size fluctuation so large, smooth surface, precise size, good mechanical properties of the hot rolled steel, semi-finished or finished products and raw materials for the production of cold rolling method. Under normal temperature, generally understood as cold, from the metal science point of view, the boundaries of cold rolling and hot rolling should be differentiated by the recrystallization temperature is lower than rolling recrystallization. The temperature is higher than the recrystallization temperature of cold rolling, rolling for hot rolled steel. The recrystallization temperature is 450 ~ 600 degrees. The difference: the simple point that 1, cold rolled plate surface has a certain gloss hand feels smooth, Similar to that used for drinking water is very common, such as hot rolled.2 steel cup without pickling treatment, is on the market and many are similar to ordinary steel plate surface, rusty surface is red, the surface of the rusty purple black (iron oxide).The performance advantages of cold rolled plate and strip is: 1, high precision, cold rolled strip thickness not more than 0.01~0.03mm.2, thinner, cold rolled steel strip rolling thickness 0.001mm hot rolling; now the thin can reach 0.78mm.3, the surface quality is more superior, cold rolled steel plate can even produce mirror surface; and the surface of hot rolled plate there are defects such as pitting of iron oxide,.4, cold rolled plate can be adjusted according to the running properties such as tensile strength and technological properties such as stamping performance requirements of the user.
Q:What's the difference between steel plate 20 and Q235 steel plate?
In the normalizing state of No. 20 steel, the yield point is 245MPa, the elongation is >25%, the quenched and tempered state, the yield point is 280MPa, and the elongation is >22%. Widely used in the production of small, high load toughness requirements of parts, such as rod, heavy and general machinery in forging the sleeve, fixture and liner, general machinery and automobiles and tractors in small parts of carburizing, cyaniding.
Q:What is a water stop steel plate?
The main application areas of water stop steel plate are tunnel, subway, dyke, culvert, water conservancy and hydropower project, construction joint, basement of high-rise building, underground parking lot, etc..
Q:Why should the back of the steel sheet pile cofferdam be pumped after the construction of the pile cap?
Loading and unloading steel sheet piles should be operated by two points lifting method. The number of steel pile piles should not be too many at any time, and attention should be paid to the protection of the locking hole to avoid damage.

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