hot rolled steel strip

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Product Description:

Product Description:

Spring Steel:

Spring steel is divided into two types, one is alloy spring steel, and other one is carbon spring steel.

Alloy spring steel is a type that is used for manufacturing springs and other elastic parts. Spring steel should have high ratio of yield strength and tensile strength and elastic limit to make sure that the springs obtain enough power of elastic deformation and can bear much load.

Types of alloy spring steel: Si-Mn spring steel, Si-Cr spring steel, Cr-Mn Spring steel, Cr-V spring steel and so on.

Specification of Spring Strip Steel:

-Material: 30W4Cr2VA

-Standard: GB/T 1222-2007

-Type: Spring Steel

Chemical Composition:

C

Si

Mn

S

0.26~0.34

0.17~0.37

≤0.40

≤0.030

P

Cr

Ni

Cu

≤0.030

2.00~2.50

≤0.35

≤0.25

V

W

0.50~0.80

4.00~4.50

Mechanical Properties:

-Yield Strength σs (MPa): ≥1470 (150)

-Elongation δ10(%):≥7

-Hardness:

1, Hot rolled + Heat treatment, ≤321HB

2, Cold drawn + Heat treatment: ≤321HB

-Impact Power: ≥40

Norm of heat treatment:

1, Quenching: 1050℃~1100℃.

2, Cooled by oil.

3, Tempering: 600℃±50℃.

Usage/Applications of Spring Strip Steel:

-Due to the elements W, Cr and V, this type of spring steel obtain pretty high hardenability and nice mechanical properties under room temperature and high temperature. The tempering stability and hot workability are good.

-Being used under the state of quenching and high temperature tempering. It’s usually used as heat-resisting springs with working temperature below 500℃, like main secure valve spring of furnace and turbine steam seal leaf springs.

Packaging & Delivery of Spring Strip Steel:

-Packing Detail: The products will be well packed.

-Marks: there are two types of marks.

1, Tag marks. To show customers the specifications of products, company name and logo and other information required by customers.

2, Color marks. It’s easy for customers to distinguish them from other products at destination port.

-Delivery Detail: 30~45 working days after receive buyer’s T.T. or L/C.

Transportation:

1, The products can be delivered by bulk vessel or by container.

2, The maximum quantity of loading of container is 25 tons.

3, The products usually are transported to the nearest port from the production place.

Payment:

-Theoretical weight/Actual weight.

-FOB, CFR or CIF.

-Terms of payment: T.T. or L/C at sight.

Photos of Spring Strip Steel:

Spring Strip Steel

Spring Strip Steel

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Q:What are the characteristics of cold rolled strip technology?
Pickling process: remove the oxide film on the surface of the raw material to ensure the high quality of the material;Rolling process: the raw material is rolled into the thickness required by the customer with a high precision mill;Bell type bright annealing: the material which is hardened by rolling can be restored to normal flexibility;Fine leveling: the softened material is refined into flat and easy to process finished material;Finished product: the finished product is packed with fine finish;Flat, strip: according to different requirements of customers, finished products straight, strip.
Q:What's the difference between cold rolled strip and cold rolled strip?
Cold rolled steel sheets are made from hot rolled sheets at normal temperatures. Although they are rolled during processing, they can also cause steel plates to heat up. Nevertheless, it is called cold rolling. Because of the cold rolling of continuous hot rolling, the mechanical properties are poor and the hardness is too high. It must be annealed to restore its mechanical properties. Rolled rolls are generally used to make products without bending or stretching.
Q:What is the difference between strip and coil?
Coil generally refers to the strip width not less than 600mm, can generally be divided into Kaiping steel plate or longitudinal strip, standard and plate together, such as: carbon and low alloy structural steel plates and strips. Strip width is generally less than 600mm.
Q:What's the cutting edge of cold rolling strip?
Cold rolled materials are generally cut edges. The hot rolled material is partly rough. Cutting edges and burrs can be viewed straight. The two sides of a strip of steel, similar to those of waves. The two sides of the trimming are straight.
Q:What is the meaning of C hot strip material, B material is how to distinguish between
1) cold plate used in cold rolling surface nonscale, good quality. The hot surface oxide thickness of hot rolled steel, have difference.2) hot-rolled steel plate toughness and surface roughness is bad, the price is low, and cold rolled plate of good extensibility, toughness, but the price is more expensive.3) rolling is divided into cold-rolled and hot-rolled steel plates, with recrystallization temperature as the regional division.4) cold rolling: cold rolling is generally used to produce strip, and its rolling speed is higher. Hot rolled steel sheet: the temperature of hot rolling is similar to that of forging.
Q:Where is the lining board made of polyurethane lining? Please contact immediately
I don't know where to use it,Wear resistant lining board is based on the use of the environment and requirements for the product design, the earliest silo chute used in wear-resisting lining board is made of PE material fabrication and installation, but in use, PE liner wear, service life, leading to the use of units often change, very inconvenient, but also affect the normal purchase and shipment. PE material hardness is very high, food and other food raw materials in the process of loading and unloading, and PU lining plate contact parts, food will be a large number of broken, seriously affecting the quality of grain. Therefore, polyurethane wear-resistant lining board arises at the historic moment. Polyurethane wear-resistant lining board, as an elastomer product, has very high abrasion resistance and resilient cushioning performance.
Q:Is there any difference between galvanized steel strip and galvanized sheet?
Galvanized strip is the same as galvanized sheet, but it has a narrow width and a roll in a pan. Galvanized sheet is also used to flatten the material. The width is 1000~1800., and the strip is almost 1000
Q:Specification and use of cold rolled strip
Cold rolled strip steel: widely used in construction machinery, transportation machinery, construction machinery, lifting machinery, agricultural machinery and light industry, civil and other general structural parts and stamping parts.
Q:What is the difference between steel strip and coil?
What do you think of rolling mills, not money ah, rolling strip is a small rolling opportunities, can be cheaper than rolling coil, and this cost should be spread to each product above, there are other what, like the cost of sharing ah.
Q:65 what is the hardness of the best heat treatment of manganese steel strip?
65, the best heat treatment hardness of manganese steel strip depends on the application and heat treatment methods, such as the general in 45~50HRC, general heat treatment at 48 degrees, the best comprehensive mechanical properties.

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