High grade hot rolled narrow strip steel

Product Description:

Definition

Edit

Strip steel

The strip generally supplied in rolls, has the advantages of high size precision,good surface quality, easy processing, material saving etc.. With the same steel plate, strip by strip material is divided into ordinary and high quality strip steel two categories; according to the manufacturing method of hot rolled strip,cold rolled strip two.

2 scope of application

Edit

Steel is widely used in the production of welded steel pipe as blank, cold-formed steel, manufacturing bicycle frame, wheels, clamps, washer, spring film,saw blade, metal products and blade etc..

Cold-formed steel

In broadband steel

The 3 process

Edit

The production process of cold rolled strip steel is generally: picklinglubrication, rolling, process, anneal and flat, cutting, packaging.

Cold rolled strip steel pickling rolling process: -- -- -- -- the size of synchronousrolling annealing lubricating antirust oil length -- -- -- flat polished package

Hot strip rolling heating furnace dephosphorization machine: -- -- -- --phosphorus removal roughing mill machine finishing mill surface quality inspection instrument -- -- -- -- layer cold coiler bundling machine -- number spraying machine -- volume base slab

The production process of hot rolling strip steel: first in the heating furnace of increasing the temperature to the desired temperature of rolling, and then oxidized to tin machine generated on the slab roller into the roughingphosphorus removal treatment, then enter the width and thickness of striproughing rolling unit rolling, iron oxide by roller conveying to phosphorus on the strip surface finishing machine produce processing, enter the width and thickness of strip finishing rolling unit for more precision rolling, strip by rollerby layer on the surface temperature of cold roll strictly control take before and after, enters the coiler for steel coil finally bundling, spraying number into thevolume storage packaging.

4 Market

Edit

In May 20th Shengfang steel prices down. According to the data Chineseindustry insight network show: Hebei forward, Sheng Bao, Bazhou Xinya, the new crown made 2.5* (232-355) steel price is 3400 yuan (ton price, the same below), down 50 yuan more than last Friday.

Influenced by Tangshan last week, small narrow billet prices, Saturday (18 days) in Shengfang area with steel mills have lowered the ex factory price. The price decline, turnover performance in general, opened today manufacturersoffer temporary stability. In addition, the Tangshan area steel prices also have lowered, 355mm strip retail pricing million in 3320-3350, with the local price difference between 50-80 yuan, relatively reasonable.

Today Tangshan small narrow band market prices show small to rise, and the futures, electronic disk also rise, but the rise of strength are insufficient. At present, the overall trend of steel spot market downturn, but the steel market is restricted by the supply pressure, the market price is the emergence of the continuing rise in prices. And will soon enter the consumer off-season, terminaldemand release rate has slowed down, expected short-term local steel marketprice is still dominated by the shock consolidation.

5 Classification

Edit

Hot rolled strip

1, hot rolled ordinary carbon structural steel (GB3524-83)

Strip steel

Hot rolled plain carbon steel with ordinary carbon structural steel as material,made of 1.80-6.00mm hot rolled strip thickness, width of 50-1200mm.

(1) the main purposes

Mainly used for cold rolling billet, cold-formed steel billet, welded steel pipebillet and bicycle, hardware products manufacturing.

(2) grade and chemical composition of materials

Standards and grades

National standard

Quite foreign standard

Function and use

Material categories

The implementation of standards

Grade

Standard No.

Grade

Suitable for manufacturing of cold forming parts

Low carbon steel coil

Q/BQB302

SPHC

JISG3131

SPHC

SPHD

SPHD

SPHE

SPHE

SAE1006/SAE1008

SAE1006/SAE1008

XG180IF/200IF

XG180IF/200IF

Steel for general structure

GB/T912-1989

Q195

JISG3101

SS330

For general construction of buildings, bridges, ships, vehicles, etc.

Q235B

SS400

SS400

SS490

ASTMA36

SS540

(3) the mechanical properties

The nominal thickness

The yield strength (Mpa)

Tensile strength (Mpa)

Elongation of A50mm%

The 180 degree bend test

>1.5-2.5

Less than or equal to 290

More than 310

More than 38

D=0a

>2.5-3.0

Less than or equal to 290

More than 300

More than 38

D=0a

>3.0-4.0

Less than or equal to 290

More than 300

More than 40

D=1/2a

Use of hot-rolled steel 2, bicycle (GB3645-89)

Bicycle for hot rolled wide strip steel in carbon steel and low alloy steel asmaterial, made of 1.8-8.0mm strip steel thickness after hot rolling, the strip width can reach 1300mm.

(1) the main uses special for bicycle manufacturing materials.

(2) grade and chemical composition of materials

(3) the mechanical properties

(4) strip (board) size

The thickness of the steel plate strip thickness 1.8-6.0mm, 7, 8.0mm.

Strip (board) width: rimming steel is less than or equal to 1300mm (a=2.0-6.0)

Killed steel is less than or equal to 1250mm (a = 3)

Less than or equal to 1300mm (a = 3)

The length of the plate, steel coil diameter 760mm, 4-6m plate.

Hot rolled strip with 3, bicycle (GB3647-89)

(1) the main purposes

Bicycle designed for the manufacture of hot rolled strip of bicycle and the chain, also can be used for cold rolled and welded pipe blank blank.

(2) grade and chemical composition of materials

(3) the mechanical properties

(4) the specification of strip

Bicycles are generally used for hot rolled strip steel strip thickness of 1.8-8.0mm, width of 60-250mm.

Hot rolled strip with 4, pressure vessel (GB5681-85)

(1) the main purposes

Used in the manufacture of low pressure vessel.

(2) grade and chemical composition of materials

(3) the mechanical properties

(4) the specification of strip and production unit

Pressure vessel is generally used for hot rolled strip steel strip thickness of 4mm, width of 80mm double length, length of not less than 70m (volume).

Cold rolling of strip

(1) the main purposes

Cold-rolled carbon steel for the manufacture of bicycles, sewing machines,agricultural machinery and other accessories and hardware products.

(2) grade and chemical composition of materials

Grade

Supply standard

Supply size

Use

SPCC

Q195

Q235-B

GB/T912

GB/T3274

Width

Mm

Thickness

Mm

Widely used in engineering machinery, transportation machinery, construction machinery, hoisting machinery。