1040 1045 Hot Rolled Carbon Steel Bar

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Min Order Qty:
100 m.t.
Supply Capability:
500000 m.t./month

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Item specifice:

Standard: AISI,JIS,GB,BS,DIN,API,EN,ASTM Technique: Hot Rolled,Cold Rolled,Cold Drawn,ERW,Forged,Saw,Extruded,EFW,Spring Shape: U Channel,Square,C Channel,Hexagonal,Round,Rectangular,Oval,LTZ
Surface Treatment: Galvanized,Coated,Copper Coated,Color Coated,Oiled,Dry,Chromed Passivation,Polished,Bright,Black,PVDF Coated Steel Grade: Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400,200 Series,300 Series,400 Series,600 Series,SS400-SS490,10#,20#,A53(A,B) Certification: ISO,SGS,BV,IBR,RoHS,CE,API,BSI,UL
Thickness: 16mm-360mm Length: 6m Net Weight: 2mt

Product Description:

1040 1045 Hot Rolled Carbon Steel Bar


Product Description of 1040 1045 Hot Rolled Carbon Steel Bar

1. Steel grade: SAE1040, 40#, C40, S40C

2. Length: 6M-12M
3. Diameter: 16mm-300mm

4. Product range: round bar, flat bar, square bar

5. Technique: Hot rolled, forged, cold drawn


Specification of 1040 1045 Hot Rolled Carbon Steel Bar



Round bar




EAF + LF + VD + Forged + Heat Treatment (optional)

Length (mm)   

Max 12m

Heat treatment

Normalized / Annealed / Quenched / tempered

Flat bar



Delivery condition

Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)




Ultrasonic test according to SEP 1921-84 D/d

Length (mm)   

Max 12m


Chemical Composition of 1040 1045 Hot Rolled Carbon Steel Bar














Photo Show of 1040 1045 Hot Rolled Carbon Steel Bar

1040 1045 Hot Rolled Carbon Steel Bar

Packing and Delivery:

Packing in bundle package, or as customer's requirements.

Delivery Detail: 45 days after receiving the deposit.


Usage and Applications of 1040 1045 Hot Rolled Carbon Steel Bar

1. Steel round bar is used in a large number of architectural and engineering structures. Or it can be used in construction of plants for the production of steel house frames, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc.

2. And we can use this kind of product on the performance of the mechanical parts if the demand is not very high.

3. Some special material steel round bar can be used for main shaft of steamer, hummer shank, with big section and supper force.

Company Information

CNBM International Corporation is the most important trading platform of CNBM group.

Whith its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high qulity series of refractories as well as technical consultancies and logistics solutions.

Astm 615 Bs4449 B500B Deformed Steel RebarsAstm 615 Bs4449 B500B Deformed Steel Rebars 



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      SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem

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4, Payment Terms?

    30% TT as deposit and 70% before delivery.

    Irrevocable L/C at sight.

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Q:What is the difference between the heat treatment of cold drawn round steel and the heat treatment of wrought round steel?
Normalizing: heating steel or steel parts to the critical point, AC3 or ACM above the appropriate temperature, after a certain period of time in the air cooling, pearlite structure of the heat treatment process.
Q:The two project is to use rebar or rebar?
Of course, depends on what steel is used for components, such as the two structure of the structure column, and other minor parts, it does not matter. Suggest a slightly larger span of the floor, do not use round steel bar, or the use of thread steel bar, and then with anti crack steel.
Q:Are steel and round steel the same thing?
Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Where: 5.5-25 mm small round steel mostly straight bundles of supply, used for steel, bolts and various mechanical parts; greater than 25 mm round steel, seamless steel pipe is mainly used for the manufacture of mechanical parts of the tube, etc..
Q:What's the difference between round steel and carbon bound steel?
Round steel is a solid strip of steel whose cross section is round. Its specifications are expressed in diameter, in units of millimeters (mm), such as "50mm", which means a diameter of 50 millimeters of round steel.High quality carbon structural steel short for carbon tie steel. Specifically, its carbon content is less than 0.08%. Compared with plain carbon steel, its quality is superior, it has strict chemical composition, and requires the guarantee of mechanical properties, high quality carbon structural steel with low impurity content such as phosphorus and sulfur.
Q:Difference between cold drawn round steel and round steel
There are different reasons for the residual stress in hot rolled and cold-rolled steel sections, so the distribution of the residual stresses is also quite different. The residual cold-formed steel section stress distribution is curved, and hot rolled steel or steel welding section on the residual stress distribution is thin.
Q:How to make the round welds on flat steel flat and qualified?
It is required that the current is suitable and the bar is stable. If required, the groove can be turned on the round steel to ensure that the welding is beautiful and qualified
Q:Which is hard, round steel or screw steel?
The difference between steel and other steel: 1 is not the same, round shape light round, no pattern without ribs, other steel surface appearance is engraved or ribbed, cohesive force that cause steel and concrete, and the bond strength of steel and concrete in the other. 2 ingredients are different, round steel (grade a steel) belongs to ordinary low carbon steel, and other steel bars are mostly alloy steel. 3 strength, steel and other steel with high strength low strength, namely, diameter of the same size as compared with other steel, round steel can bear the pulling force than other reinforced small, but the plastic steel reinforced bar is stronger than the other, there is a large deformation in the break before, and it reinforced the deformation the break before the much smaller.
Q:How many meters is the minimum loading surface of galvanized steel wire for grounding grid?
Flat steel adopts negative deviation rolling, but according to actual weight delivery, the utilization ratio of steel plate increased by -5 percentage points. Flat can according to user needs, set the thickness, width and length of production, for the user to reduce the cut and save processes, reducing labor, material consumption, but also reduce the loss of raw materials processing, time saving, material saving. Products have been specialized in steel structure manufacturing, machinery manufacturing, automotive industry, mining machinery, lifting machinery and other industrial materials.
Q:Can the same grade steel instead of round bar be ok?
The above analysis, threaded steel than round steel performance is good, in general circumstances can be replaced.
Q:1, three, two, steel, wire rod, round steel what is the difference?
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. Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Among them, 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. They are more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or seamless steel tube billets.

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