Supply Steel Flat; Flat Steel Bars with High Quality

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Min Order Qty:
3000 m.t.
Supply Capability:
10000 m.t./month

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Product Description:

Product Description:

Spring Steel can be divided into two types. One is carbon spring steel, and other one is alloy spring steel.

Alloy spring steel is based on carbon spring steel, by adding one or more alloying elements to improve the mechanical properties, hardenability and other properties to meet the requirement for manufacturing all kinds of spring steel.


Specification of Spring Steel:

-Material: 70Si2CrA

-Production: Hot rolled or cold rolled

-Standard: GB/T·5218-1999

-Type: Spring Steel

-Alloy or no: Alloy

Mechanical Properties:

-Annealing Condition:

1, Tensile Strength: σb/MPa:≤835

2, Elongation: δ/%:≥8

-Quencher condition:

1, Tensile strength: σb/MPa:785~1175

2, Elongation: -


Usage/Applications of Spring Steel:

For manufacturing all kinds of flat spring or round spring with small sections, clockwork spring,


Packaging & Delivery of Spring Steel:

-Packing Detail: The products can be packed in bundles by steel wires.


1, Tag marks: the tag marks will be tied up to each bundle of the products. The information is usually including supplier’s logo and name, product name, made in China, products’ specifications, the painted color and other information requested by customers.

2, Color marks: we will paint both ends of the bundles of these products to make sure that they are more evident. It’s will be more convenient for the customers to distinguish them at the destination port.

-Delivery Detail:

1, Delivery time: 30~45 working days after receive buyer’s T.T. or L/C.

2, Delivery status should be written in the contract. (Heat treatment or no)



Q1: Why buy Materials & Equipment from

A1: All products offered are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.

Q2: How do we guarantee the quality of our products?

A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.

Q3: How soon can we receive the product after purchase?

A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.


 Supply Steel Flat; Flat Steel Bars with High Quality

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Q:What is the quota for the flat steel used in the lightning belt -40*4?
Fixed the lightning belt installation "is based on the 8 mm galvanized steel park system, you can make the material conversion and adjustment.
Q:Do lightning protection, lead out of the galvanized round steel, flat steel needs to be inspected?
No, when purchasing hot galvanized round steel and flat steel, please offer the factory certificate and inspection certificate.
Q:What is the tensile force of the galvanized flat steel of 20*3?
According to "hot rolled flat steel size, shape, weight and allowable deviation", GB 704-88:Ordinary class allows upper deviation +0.3mm, lower deviation -0.5mm; higher allowed upper deviation +0.2mm, lower deviation -0.4mm, the upper deviation is not to think, do not exceed the next deviation is good.
Q:How many years can hot dip galvanized flat steel be used?
Industrial areas are heavy industries, causing air pollution in the region. Pollution may be caused by fuel gas, such as sulfur and nitrogen oxides, or other gases released by chemical plants or processing plants. Particles suspended in the air, such as dust produced in the process of steel production or deposition of iron oxides, also increase corrosion. In such an environment, life expectancy is about 20-30 years.
Q:What is the difference between flat steel and steel sheet material
It is a kind of flat steel, flat steel plate is mainly used for general structure, construction, general machinery parts; and the steel plate is including carbon steel, alloy steel, high performance steel structure, this kind of material is.
Q:What is the use of slitting flat steel?
Compared with the conventional steel plate, slitting flat steel has the following advantages:1, the product surface is bright and clean. Two times in the process of high-pressure water descaling process, to ensure that the steel surface clean and bright.2, special product specifications. The thickness of 8~45mm, width 150-600mm, length 5-15m, and the product specifications span is dense, can meet the needs of users, instead of in use, without cutting board, we can directly carry out welding.3, both sides of the vertical, clear water chestnut. The two vertical rolling in the finishing mill ensures good verticality of both sides, clear corners and good quality of the edges.
Q:What is flat steel, please?
Steel strip steel rectangular and with pure edge of cold drawn steel, stainless steel flat steel. Stainless steel flat can be semi-finished steel. There are cold drawn polished stainless steel flat and hot-rolled acid white and sand blasting stainless steel flat. The raw material for producing stainless steel flat bar is stainless steel square billet, and the finished stainless steel flat bar is produced by hot rolling, normalizing or hot rolling, pickling (or sand blasting), cold drawing and polishing. The two sides are equal in width. The specifications are expressed in millimeters of edge width * * edge thickness. Such as 30 * 3, that is, width of 30 mm edge, 3 mm thick edge of stainless steel flat side.
Q:-40x4 hot galvanized flat steel, a water 1m, what do you mean?
Water is to protect the wall foundation using cement mortar width not less than 600 of a circle along the walls of the cement ground, if the main part of the project before the electrical engineering, auxiliary grounding length less than in bulk water, auxiliary grounding, ditching to destroy the water, so that the design requirements of 1 meters water is conducive to the construction of welding, may be more than one meter in order to facilitate their work.
Q:How to use -40*4 galvanized steel bar to do grounding electrode?
The combination of conductors or conductors that are buried in the earth so as to connect with the earth is called a ground electrode. The grounding electrode is the electrode which is in full contact with the ground and realizes the connection with the earth. In the electrical engineering, the grounding electrode is made of a plurality of 2.5M long, 45X45mm galvanized steel angles, and is nailed at the bottom of the 800mm deep groove, and then is drawn out with the lead out line.
Q:Does the cable trench need grounding?
According to the design requirements of excavation and masonry, the groove side wall welding force angle, steel frame and required to ground, covered with the cover of the underground channel, that is, cable ditch. Its purpose is to lay underground tunnels for cables.

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