Mild Carbon Steel Flat Bar

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Specification of Carbon Steel Flat Bar

Commodity: Carbon Steel Flat Bar

Standard: GB, JIS, ASTM,

Material: Q235, SS400 or Equivalent

Origin place: China

Thickness: 3mm-30mm


Length: Max 12m

Certification: SGS/BV


Chemical composition of Q235

Alloy No
















Physical properties of Q235

Alloy No


Yielding strength point(Mpa)

Tensile strength (Mpa)

Elongation after fracture(%)

Thickness (mm)

Thickness (mm)





















                                          Usage/Applications of Carbon Steel Flat Bar

Widely used for construction;

Machinery manufacturing;

Iron tower steel structure;

Shipbuilding; Steel grating;




Railway spare parts;

Boilers making etc.


Packaging & Delivery of Carbon Steel Flat Bar

Packaging Details: The Steel Flat Bars are packed in bundles and loaded in 20 feet/40 feet container, or shipped by bulk cargo ,also we can do as customer's requirements.

Delivery Details:30~45 days upon the receipt of buyer payment by T.T. or L/C.


Production Flow of Carbon Steel Flat Bar

The Carbon Steel Flat Bar is made through three processes:

1.Feeding the material: Feeding the row material (the steel plate) to Slitting Line.

2.Slitting:The steel plate would be slitted into expected width by lengthways cutter.

3. Leveled and cutting: The plat bar would be ground into level by the grinder and then cut into required length.



Q1: What makes stainless steel stainless?

A1: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.

Q2: Can stainless steel rust?

A2: Stainless does not "rust" as you think of regular steel rusting with a red oxide on the surface that flakes off. If you see red rust it is probably due to some iron particles that have contaminated the surface of the stainless steel and it is these iron particles that are rusting. Look at the source of the rusting and see if you can remove it from the surface.

Q3: Why buy Materials & Equipment from

A3: 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.



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Q:How to connect the base of the tower crane and the flat steel? How can it be welded and connected?
How to connect the base of the tower crane and the flat steel?:It can be punched on a flat iron and connected by screws and multiple copper wires
Q:The minus sign in front of what 40 galvanized flat steel
Also called hot galvanized and hot dip galvanizing: hot dip galvanizing is an effective way of metal corrosion, mainly used for metal structure on the facilities of the industry. The steel piece after being cleaned is dipped into the molten zinc liquid at about 500 DEG C so that the zinc coating is adhered on the surface of the steel member so as to prevent corrosion.
Q:How large is the flat steel used for equipotential grounding?
3.2.15 general equipotential connection with the sectional area of protective bonding conductors, shall not be less than the maximum protection of conductor size distribution line 1/2, protective bonding conductor cross-sectional area of the minimum and maximum value shall comply with the provisions of table 3.2.15.
Q:What is the weight calculation formula for galvanized flat steel and galvanized steel angles?
(1) grounding wire is generally made of 40mm * 4mm galvanized flat steel.(2) galvanized steel or angle steel for earthing body. The diameter of the steel pipe is 50mm, the wall thickness of the pipe is not less than 3.5mm, and the length is 2 to 3m. Angle iron shall be 50mm * 50mm * 5mm.(3) the top of the grounding body from the ground 0.5 ~ 0.8m, in order to avoid thawing soil, soil resistivity or steel angle as the root number of the ground around the body and decide, generally not less than two, each spacing is 3 ~ 5m(4) the distance between the grounding body and the building is over 1.5m, and the distance between the grounding rod and the independent lightning rod is greater than 3m.(5) the connection of grounding wire and earthing body shall be done by lap welding.
Q:What is the negative deviation allowed by the national standard for galvanized flat steel of 40*4?
40*4 galvanized flat steel GB permitted negative deviation value is the thickness deviation value is 0.2mm, the deviation 0.4mm, the width deviation value is the upper deviation 0.5mm, lower deviation 1.0mm
Q:What is the surface area of flat steel 100*3 meters per metre?
Flat steel can be finished steel, or can be used as the blank of welded pipe and thin slab for laminated sheet rolling. Main application: flat steel is used as a material, used for making iron, tools and machinery parts, and used as frame structures and escalators for buildings.
Q:What is the appearance of hot galvanizing and cold galvanized flat steel?
The appearance of cold plating smooth point heat plating, there is also the difference between the two prices, if the project budget it is recommended to use a hot dip, if it is hot for outdoor plating relatively easy to rust, cold plating used in outdoor it is easy to rust, the appearance is not good, relatively Engineering the quality will also be questioned, if you can use the indoor cold plating, can save a lot of budget
Q:Construction of lightning protection ground galvanized flat steel approach, need to retest test? What's the test?
Forged flat steel is a forged strip of steel with a rectangular cross section. Forging injustice can get certain shape and size and forgings, casting microstructure of the steel is remarkably improved, increase the density of steel; can change the distribution of the fiber structure, clear anisotropy, improve the mechanical properties of the metal, so that the strength and toughness of steel are improved; and it can be used to process the plastic lower high Shuogang and high alloy steel. Forged flat steel is mainly made of high quality alloy steel, mainly used as springs, tools and important mechanical parts.
Q:Why do some buildings need a steel bar around the top?
Round steel (grade 1 steel) belongs to ordinary low carbon steel with low strength. However, the plasticity of the round bar is stronger, that is, the round steel has a larger deformation before it is pulled off.It has been widely used in the fields of hardware, construction, automobile, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, space, etc.. The most extensive machining of general machine parts, general rod type steel parts, CD pole, bolt, nut.Refers to the galvanized flat steel width 12-300mm, thickness 4-60mm, cross section is rectangular and with pure edge of galvanized steel. Galvanized flat steel can be finished steel, also can be galvanized pipe blank and galvanized belt. With high strength, light structure: strong grid welding structure, so that it has high load, light structure, easy lifting and other features, beautiful appearance, durable.
Q:Is there a requirement for the ground resistance of the field motor? Is it good to use ground flat steel or ground wire?
The grounding steel is better, the resistance is small, and the wiring is convenient, and the grounding is flat steel.

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