High Quality Mild Steel Flat Bar in Grade Q235

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
25 m.t.
Supply Capability:
100000 m.t./month

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Product Description:

Specification of Steel Flat Bar

Commodity: Carbon Steel Flat Bar

Standard: GB,JIS,ASTM,

Material: Q235,SS400 or Equivalent

Brand name: FLATSPACE

Origin place: China

Thickness: 3mm-30mm

Width:20mm-200mm

Length: Max 12m

Certification: SGS/BV

Chemical composition of Q235

 

Alloy No

Grade

Element(%)

C

 

Mn

 

S

 

P

 

Si

 

 

Q235

 

 

B

 

 

0.12—0.20

 

0.3—0.7

 

≤0.045

 

≤0.045

 

 

≤0.3

 

Physical properties of Q235

Alloy No

Grade

Yielding strength point(Mpa)

Tensile strength (Mpa)

Elongation after fracture(%)

Thickness (mm)

Thickness (mm)

≤16

>16--40

>40--60

>60--100

≤16

>16--40

>40--60

>60--100

 

Q235

 

B

 

235

 

225

 

215

 

205

 

375--500

 

26

 

25

 

24

 

23

 

 

 

 

 

 

 

 

 

 

 

 

Above sheets show the technical data of Q235,we can also provide other materials similar to Q235.

Usage/Applications of Steel Flat Bar

Widely used for construction;

Machinery manufacturing;

Iron tower steel structure;

Shipbuilding; Steel grating;

Staircase;

Bridge;

Viaduct;

Railway spare parts;

Boilers making etc.

Packaging & Delivery of  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.

 

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Q:The total floor distribution along the wall surface 40x4 galvanized flat steel, flat paint is painted yellow mark or brush a straight chute
Mainly to use insulating coatings.
Q:Are there any differences between flat iron and flat steel?
The steel and iron are carried out using redox reaction, but there is a great difference in the response object: iron is iron reduced, while steel is the excess carbon in pig iron and other impurities in the actual operation, so the two links are different.There are three main ways to make steel: converter, electric furnace and peace furnace. Among them, the converter steelmaking method is more common. We do not need to remember its specific operations (but only to lead to understanding), but attention should be paid to reactions such as ferric oxide, removal of magazines and deoxygenation. A large amount of brown vapor is produced during steelmaking, consisting of iron oxides, dust particles, and high concentrations of carbon monoxide, which must be purified.
Q:Construction of electrical grounding steel flat buried anti-corrosion requirements, galvanized steel flat welding parts should be done anti-corrosion treatment, not welding parts are also doing anti-corrosion treatment?
The welding part needs to corrosion because in the welding process the heat melted metal surface coating, so this part, other parts such as did not cause damage to the galvanized layer in the construction process, there is no need for antiseptic treatment.
Q:What about the installation height of the socket and the height of the ground flat steel?
In accordance with the final use of functional considerations, it is not recommended to reduce the socket installation height. According to the actual use of functional requirements, the socket location can be changed to optimize to avoid the ground flat iron position? If it is not feasible, then reduce the height of ground flat iron.
Q:The distinction between flat steel and steel strip
Blue is to heat the steel or directly immersed in concentrated oxidizing solution in the air, material protection technology of oxide film on the surface of thin produce, also known as black. The blue steel parts can be carried out in the molten salt of sodium nitrite and sodium nitrate, can also be carried out at high temperature above 500 DEG C hot air and superheated steam, the more common is heating sodium nitrite in concentrated caustic soda. Solution composition, reaction time and the temperature of Bluing depends on steel matrix composition. Bluing film composition is magnetic iron oxide, the thickness of 0.5 to 1.5 microns, the color and the material composition and process conditions, a dark gray, dark blue, etc.. Bluing film separate corrosion resistance is poor, but the oil wax or paint varnish, corrosion resistance and friction resistance are improved. Blue, the workpiece has little effect on the quality of size and finish. It is commonly used in precision instruments, optical instruments, tools, hardness blocks and so on.
Q:Difference between cold drawn flat steel and flat steel
Flat, refers to the width 12-300mm, thickness 4-60mm, cross section is rectangular in shape and with a blunt edge of steel. 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:Lightning protection grounding, what is called three surface welding?
When lap welding is adopted, the welding length is as follows:1, galvanized steel bar is not less than its width of 2 times, three surface welding. When the width of flat steel is different, the length of lap should be wide. Before laying, the flat steel should be adjusted straight, simmer, bend not to die, straight line should not be obvious bending, and should stand upright.2, galvanized round steel welding length of 6 times its diameter, and should be double-sided welding (when the diameter is not the same, the length of overlap in diameter should prevail).3, galvanized round steel and galvanized flat steel connection, its length is round steel diameter of 6 times.4, galvanized flat steel and galvanized steel pipe welding, in order to connect reliable, in addition to contact in itBoth sides of the site shall be welded, and the flat steel itself shall be bent in an arc to be welded with the steel pipe.
Q:What is the weight calculation formula for galvanized flat steel and galvanized steel angles?
That is volume * density = weight.For example: L50*5 angle, general case, hand count is (0.05*2-0.005) *0.005*7850=3.729kg/m; 6m is 3.729*6=22.37kg [formula is W= (both long - and angle angle thickness) * angle thickness *7850* meters, of which 7850 were iron density value after conversion unit after multiple values, namely 7850kg/m3. The length and thickness and the number of meters into units are in meters, the weight of the unit is kg W.
Q:What is 40x4 galvanized flat steel, please?
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.
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.

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