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: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 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:Billet production process
Billets are produced by three process methods:First, through the steelmaking system of continuous casting equipment, from the direct pouring of molten steel billet;Two is the steel ingot produced by the steelmaking system or the continuous casting billet processed by the rolling equipment of the steel rolling system, and the three is the semi-finished product processed by the forging equipment of the steel ingot produced by the steelmaking system.
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:Billet heating furnace billet temperature reached, steel will be adhesion
As soon as the melting point is reached, the part melts before sticking. But heating will swell a lot, you need to leave enough space.
Q:20 what is the difference between manganese silicon steel billet and Q235 billet?
In brief, the ingredients are different and the uses are different.20 manganese silicon steel billet for high strength steel,Q235 billet is almost the most common steel, requiring the lowest.
Q:What is the difference between carbon three plants and carbon four plants?
The mesophyll cells of carbon three plants are more dispersed, and there are no chloroplasts in bundle sheath cells. Photosynthesis is only carbon three cycle, and the utilization rate of carbon dioxide is low. It usually lives in temperate zone.Four carbon plant mesophyll cells arranged regularly, the formation of two circles of the "ring" and bundle sheath cells, bundle sheath cells have no chloroplast grana, photosynthesis has three carbon cycle and carbon cycle four, higher utilization rate of carbon dioxide, the general life in tropical and subtropical regions.The initial product of CO2 assimilation is not photosynthetic carbon cycle in three carbon compounds 3- phosphoglycerate, but four carbon compounds malic acid or aspartic acid plant.
Q:Difference between billet, slab and billet
Production process of billet is through three methods: one is through the production of steelmaking and continuous casting equipment system, the molten steel is directly cast into the billet; two of steelmaking production systems of steel ingot or billet by rolling system of steel rolling equipment processing semi-finished products; three is the production of steelmaking system by forging semi-finished steel ingot the processing equipment. Market trends 1, domestic crude steel production remains high, although the domestic steel market has been relatively sluggish in recent times, and steel losses are more, 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:Who knows the diamond is?Who knows the diamond is carbon? Is it C60?
It is also called the diamond diamond, crystal, it is not the molecules themselves, so the formula does not apply to.C said it is only by this kind of carbon elements. While C60 is footballene is another matter, the 60 is because it is a molecular crystal, each molecule consists of 60 carbon.
Q:What is the difference between steel and billet in the process?
Square is a square steel hollow, with iron produced; but it is a square steel billet is generally solid, forging or casting molding.

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