Hot rolled steel billet

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Product Description:

After casting billet is ingot steel products. Mainly from the manufacturing process of billet can be divided into two kinds: die casting billet, slab and the die casting process has been basically eliminated. Mainly from the shape is divided into two kinds:

Slab: cross section width and height of the ratio of the larger, mainly used for rolling plate.

Billet: equal cross section width and height, or a huge difference, mainly used for rolling steel, wire rod. ,

use

The editor


Billet was rolled steel, after processing can be used for mechanical parts, forging parts, processing all kinds of steel, steel Q345B channel steel, wire rod is the role of the billet.

Steel billet is used in the production of semi-finished products, generally cannot be used directly for the society. Steel billets and steel are strictly divided into standard, cannot decide to whether the business enterprise of the final product, and according to unified standards to perform the whole society. Typically, billet and the steel is relatively easy to distinguish, but for some steel billet, and have the same specification and same steel purposes (such as rolling tube billet), whether can be used for other industries, whether through steel processing process, whether through a finished product rolling mill processing to distinguish. [1]

3 material

The editor


Rectangular billet continuous casting billet and mainly general carbon steel, low carbon low silicon cold-rolled material, high quality carbon structural steel, high strength low alloy steel, special steel, etc.

The production process


Steel billet is produced by the method of through three processes:

It is through the steelmaking system of continuous casting equipment, directly by the molten steel pouring into billet;

The second is the steelmaking system in the production of steel ingot casting billet through system of steel rolling rolling equipment or processing of steel semi-finished products; Three is the steelmaking system production of steel ingot by forging the semi-finished product processing equipment. [1]

4 market movements

The editor


1, high domestic crude steel production

Although the domestic steel market has been weak in these days, and steel mills deficit to win more less, but it does not seem to affect the enthusiasm of steel production. According to figures from the cisa: early April, the domestic key enterprises crude steel output of 1.6973 million tons, the national forecasts crude steel output of 2.1239 million tons a day. And mid-april although ten-day monthly crude steel output has dropped, but still at a higher level. According to statistics, in the middle of April crude steel output was 1.6891 million tons a day national key enterprises, the national forecasts crude steel output of 2.1158 million tons a day. So much of the production and demand downturn in stark contrast, this also is a drag on one of the important factors of billet prices downward.

2, the billet demand has no obvious improvement

Although has entered the traditional peak season demand, steel billet actual demand situation there is no improvement, even weak parts in March, the market for manufacturer of may is more pessimistic. Currently, tangshan market view, the billet rolling operating at less than 80%, and the rolling factory procurement cautious, inventory control in the low post. Weaker terminal market, steel billet, the rose slightly, weakened purchasing immediately; And the price, demand is also no substantive improvement.

3, tangshan billet falling inventories

It is understood that in April tang shan area each big rolls billet stock began to decline, as of April 28, tangshan billet inventory around 1.25 million tons, than high roughly halved. But there is also a manufacturer said: some resources is made after converted to traders, actually is much larger than the inventory statistics, and 1.25 million tons of steel billet inventory is about 2.5 times in the same period last year.

In addition, China industry insight into network analysts believe the macroeconomic situation is weaker, the negative news is more steel and iron and steel industry the credit crisis will be adverse to the billet market outlook. But considering the steel mills had been losing money in production, make steel billet has certain defensive; And a small long vacation before five billet prices fell back quickly, it is likely to holiday makers to pull up some bedding.

Material standard

The editor


Range of thickness: 150-240 - mm + / - 5 mm width range: 880-1530 - mm + / - 20 mm

Length: 3700-10000 - mm + / - 500 - mm

Cross-sectional size: 64 * 64; 82 * 82; 98 * 98; 124 * 124; 120 * 150; 152 * 164; 152 * 170 mm

Length: 9000 mm

Section of tolerance: billet: 1.0 + / - 2.0-1.0 + / - 1.0 mm slab: width: + / - 2.0 mm thickness: + / - 3.0 mm

The length tolerance: + / - 200 mm

Section diagonal tolerance: 3.5-8.0 MM

Billet section size protrusions requirements: < 1242 mm, do not allow; > = 1242 mm, < = 2 mm 1242 mm, < = 3 mm

Beheading (shear) extension deformation: < 1242 mm billet: no control; The slab: < = 15 mm

Surface tilt: no more than billet section 0.1

Bending: every 1 m length is not more than 10 mm.


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Q:Billet market trend
1, domestic crude steel production remains highAlthough the recent domestic steel market has been relatively low, and the loss of steel mills win less, but this does not seem to affect the enthusiasm of steel production. According to the China Steel Association statistics show that: in early April, the daily output of crude steel in key enterprises in China was 1 million 697 thousand and 300 tons, and the average daily output of crude steel in China was estimated at 2 million 123 thousand and 900 tons. And in mid April, crude steel daily output of ten days, although there has been a drop back, but still at a high level. According to statistics, in mid April, the average daily output of crude steel in key enterprises nationwide was 1 million 689 thousand and 100 tons, and the average daily output of crude steel in China was estimated at 2 million 115 thousand and 800 tons. Such a large production and sluggish demand in stark contrast, which is a drag on steel prices down one of the important factors.
Q:What is the HS number for billet export?
Your specification 13*13*6 or 12 meters, this is a square cross section, so 7207120000 this can not be used, your billet carbon content is 0.17 to 0.23% less than 0.25%, so we must use the following7207190000 Other Billets with carbon content less than 0.25%Export tax refund: 0%MFN country of import tariff: 2%General customs duties: 11%Export tariff rate: 0%VAT: 17%
Q:What does "billet" mean?
Steelmaking and continuous casting of steel products are mainly used for steel rolling, such as round bar, wire rod, sheet metal and so on
Q:What is the difference between carbon three plants and carbon four plants?
Also known as C4 plants. Such as corn, sugar cane, sorghum, amaranth and so on.CO2 is the first product of the assimilation of photosynthetic carbon cycle in three carbon compounds 3- phosphoglycerate plants, known as carbon three plants (C3 plants), such as wheat, soybeans, cotton, tobacco, etc.. C3 plants have higher CO2 compensation points than C4 plants, so the survival rate of C3 plants is lower than that of C4 plants when the CO2 content is low.By contrast, the division of C3 plant cells is less definite than that of C4 plants, and CO2 uses less efficiently. To some extent, C3 plants may be considered as prokaryotes in plants, whereas C4 plants are more like eukaryotes".
Q:Fish pole carbon cloth tcf. Vcf. Svf. Hcf. On behalf of what?
Carbon cloth classification, a semicolon after the term, usually called HVF and SVF, where SVF is divided into VCF and so on! The index of carbon fiber is T (ton), common carbon part is 20T-30T commonly. HVF is 30T-40T, SVF is 40T-60T. SVF lighter than HVF, higher strength, better elasticity of the material of products: Di 46T SVF meaning 60T ultra high strength and high modulus carbon fiber cloth, HVF carbon fiber reinforced 30T 40T strength and high modulus. But the domestic ordinary carbon fishing rod material is generally 24T carbon fiber cloth. The higher the T value, the higher the strength and elasticity of the material.
Q:Use medium frequency furnace (1 million 500 thousand volt ampere) to produce 1 ton cast steel blank, how much kilowatt hour is consumed?
This depends on the intermediate frequency furnace voltage level and inverter efficiency, the general high voltage will save power, generally 550-700 range, details can refer to wcdlsb.net site medium frequency furnace data
Q:Difference between medium frequency continuous casting billet and electric furnace continuous casting billet
In general, the difference between medium frequency furnace steelmaking and electric arc furnace steelmaking:1, intermediate frequency furnace slag can not, so the harmful elements such as P, S and other elements can not be removed, and the electric arc furnace can;2, if not blowing furnace carbon reduction, so C elements cannot be adjusted downward, and the arc furnace can only increase;
Q:What is carbon accumulation?
Generally refers to the polycarbonate, PC, is a kind of thermoplastic plastics, good transparency, good mechanical properties, surface hardness, common uses such as CD, plastic glasses, a fence, protective window, public places, vacuum cleaners, coffee machine, juicer barrel, refrigerator shelf, pure such as the bucket.
Q:What is the drop per minute of the billet temperature at 850?
Cold rolling is not considered. The initial rolling temperature (surface) of the billet is generally 1000-1150 degrees.
Q:What does the billet of the steel plant refer to?And steel what is the difference?
Billet is the product of molten steel made by steelmaking furnace. After casting, the billet can be divided into two kinds: casting blank and continuous casting billet. At present, the casting process has been basically eliminatedRefers to the use of reinforced and prestressed concrete with steel reinforced concrete, the cross section is circular, sometimes square with rounded corners. Including round bars, ribbed steel bars, steel torsion bar.

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