Hot Rolled Carbon Steel Round Bars S20C

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50 m.t.
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120000 m.t./month

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Product Description:

 Hot Rolled Carbon Steel Round Bars S20C


Product Specification

1, Chemical Composition %


2, Mechanical Properties 

Strength of Extension σbYield Strength  σsElogation δ5
≥245 Mpa≥245 Mpa≥28%

3, Diameter: 16mm - 300mm

    Length: Max 12m



Can be used to manufacture all kinds of machine parts with high tenacity but won't be subjected to large stress.

Can be used to manufacture carburizing and carbonitriding parts with high surface hardness in general machinery and automobile, agricultural machinery.  


Product Main Points

1, Heat Treatment: normalizing, annealing, tempering, quenching

2, Surface Treatment: black, grinding, bright, polish

3, Product Process: hot rolled, cold drawn, forged



1,  Payment Terms:

      30% T/T deposit & 70% T/T before delivery.

      Irrevocable L/C at sight

2, Trade Terms:


3, Delivery Time:

     Normally 30-40 days. According to quantity.

4, Manufacture or Trading Company:

    CNBM is a state-owned fortune global 500 trading company. We have intergrated supply system.

    There are about 20 overseas locations in different countries.


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Hot Rolled Carbon Steel Round Bars S20C


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Hot Rolled Carbon Steel Round Bars S20C


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Hot Rolled Carbon Steel Round Bars S20C

Hot Rolled Carbon Steel Round Bars S20C


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Q:Difference between round bar and other steel bars
Round steel is a solid strip of steel whose cross section is round. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter.
Q:What is the reason that the diameter 130-45 round steel will break after welding?
Steel No. 45 belongs to medium carbon steel. Because of its high carbon content, it has poor weldability, but its comprehensive property is good. If welding is needed, it needs to be preheated before welding and heat treated after welding to reduce its internal stress. The more commonly used weldability is No. 20 steel. In order to improve the performance of No. 20 steel, heat treatment is usually applied to its surface.
Q:12mm Round steel, the material is Q235, the maximum weight can bear?
The cross sectional area of 12mm steel is 3.14*36=113.04 mm, the maximum can bear much weight: 113.04*235=26564.40 cattle, is about 26.56440 kn.
Q:What's the difference between bar and round bar?
Quenching is a heat treatment behavior, as raw material will not be quenched, and generally should be normalized or annealed by reasonRound steel can also be used for seamless steel tube perforation, bar material can not be
Q:Is there a standard for the grounding of pumping units and the length of the length of the angle steel or round steel?
What to play a few piles, with triangle connection, these seem to have some places have standards, but a place, a kind of, in general, general one is: ground wire pile to hit the moist soil layer, ensure the grounding reliable
Q:The problem of dowel bars on concrete pavements?
The left and right half of the casting, the middle of the set is a longitudinal pull rod, tie rod settings and your panel thickness and plate width, length of the boardTo Portland cement concrete surface layer as an example: when the plate is 3M, the thickness of the surface layer is 200-250mm, the rod Phi 14 * 700mm * 900mm rebar length and spacing from the lateral transverse joint distance not less than 10mm (mean distance is a piece of plate length is 4 meters to the two plates the net is not small 100mm).
Q:How can stainless steel rounds occur? Is it a quality problem?
Cracks caused by inclusions in steel, cracks and steel surface of a certain angle, about 1 ~ 2.5mm, slightly decarburization on both sides, decarburization layer 0.10 ~ 0.15mm. There are inclusions on both sides of the crack and in the tail, and the ferrite band is formed
Q:Use of stainless steel round bar?
Stainless steel round bar is a kind of long material, and it is also a kind of bar. The so-called stainless steel round bar refers to the cross section is even round long material, generally about four meters long. It can be divided into light and black. The so-called light circle, refers to the smooth surface after processing and quasi rolling; and the so-called, refers to the surface of the black, coarse, and direct rolling.
Q:What is galvanized round bar?
A cylindrical bar of iron or steel bar that crosses a layer of zinc on its surface.
Q:Lightning protection earthing zinc plating flat iron and round steel welding method, need to flat iron wrapped in round steel outside welding?
Don't need, but the welding seam area not less than round or flat between the relatively small cross section, the weld to coated with anticorrosive paint. Generally speaking, the grounding part does not use steel, galvanized L type flat iron good effect (copper strip and galvanized L type flat iron is not much, just life is long, but the cost is much higher), round only used as grid wiring.

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