• Standard Size Q235 Hot Rolled Steel Flats from China System 1
  • Standard Size Q235 Hot Rolled Steel Flats from China System 2
  • Standard Size Q235 Hot Rolled Steel Flats from China System 3
Standard Size Q235 Hot Rolled Steel Flats from China

Standard Size Q235 Hot Rolled Steel Flats from China

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Loading Port:
China main port
Payment Terms:
TT or LC
Min Order Qty:
50 m.t.
Supply Capability:
200000 m.t./month

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 Details of Standard Size Q235 Hot Rolled Steel Flats from China

Minimum Order Quantity:25MTUnit:m.t.Loading Port:China Main Port
Supply Ability:80000-100000MTS/YEARPayment Terms:TT or LC

Specification of Standard Size Q235 Hot Rolled Steel Flats from China

Commodity: Q235 Steel Flat Bar

Standard: GB

Material: Q235

Brand name: FLATSPACE

Origin place: China

Thickness: 3mm-30mm

Width:20mm-200mm

Length: Max 12m

Certification: SGS/BV

Chemical composition of Standard Size Q235 Hot Rolled Steel Flats from China


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 Standard Size Q235 Hot Rolled Steel Flats from China


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


Usage/Applications of Standard Size Q235 Hot Rolled Steel Flats from China

Widely used for construction, Machinery manufacturing, Iron tower steel structure, Shipbuilding; Steel grating, Staircase, Bridge, Viaduct, Railway spare parts, Boilers making etc.

Production Flow of Standard Size Q235 Hot Rolled Steel Flats from China

The 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.

Packaging & Delivery of Standard Size Q235 Hot Rolled Steel Flats from China

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.

Pictures of Standard Size Q235 Hot Rolled Steel Flats from China

 


Q:How do steel flat bars contribute to the fire resistance of structures?
Steel flat bars contribute to the fire resistance of structures by providing structural support and stability. Due to their high melting point and excellent strength, steel flat bars can withstand extreme temperatures, preventing the collapse of the building during a fire. Additionally, they help to distribute the heat evenly, reducing the risk of localized hotspots and structural failure.
Q:How do you determine the weight capacity of a steel flat bar shelf?
Several factors need to be considered in order to determine the weight capacity of a steel flat bar shelf. Firstly, one must be aware of the dimensions of the shelf, encompassing its length, width, and thickness. These dimensions will impact the overall strength and load-bearing capacity of the shelf. Next, it is important to identify the type of steel employed in the construction of the flat bar shelf. The strength and durability of different steel types vary, hence affecting the weight capacity. Furthermore, the distribution of weight across the shelf needs to be determined. If the weight is evenly distributed, the weight capacity of the shelf will generally be higher compared to a situation where the weight is concentrated in a specific area. Additionally, any other factors that may influence the weight capacity, such as the method of installation or support, must be taken into consideration. For instance, if the shelf is secured to a wall or supported by brackets, the strength of these supporting elements can impact the weight capacity. For a more precise determination of the weight capacity, engineering tables or reference guides that provide load ratings for different steel flat bar sizes and types can be consulted. These resources consider factors like the yield strength and ultimate strength of the steel, as well as any relevant safety factors. Alternatively, if there are specific requirements or concerns, it is advisable to consult a structural engineer or a professional in the field who can provide a more accurate assessment of the weight capacity based on the specific details of the steel flat bar shelf.
Q:Are steel flat bars suitable for machine frames?
Indeed, machine frames can generally be constructed using steel flat bars. Steel is renowned for its robustness, longevity, and ability to withstand wear and tear, which renders it a prevalent selection for machine frames across diverse industries. The flat and rectangular shape of steel flat bars proves especially advantageous for the construction of machine frames as it facilitates effortless welding and assembly. Moreover, steel flat bars provide exceptional stability and rigidity, ensuring that the machine frame can effectively bear the weight and vibrations produced during machine operation. In summary, steel flat bars furnish a dependable and solid base for machine frames, making them a fitting choice for this purpose.
Q:Are steel flat bars susceptible to corrosion?
Yes, steel flat bars are susceptible to corrosion. Corrosion is a natural process that occurs when steel is exposed to oxygen and moisture, which results in the formation of rust. Steel contains iron, and when it comes into contact with oxygen and water, it undergoes a chemical reaction known as oxidation. This process weakens the steel's structure and can lead to its eventual deterioration. To prevent or slow down the corrosion process, steel flat bars can be coated with protective layers, such as paint, galvanized coatings, or anti-corrosion treatments. These measures create a barrier between the steel and the surrounding environment, reducing the exposure to moisture and oxygen. However, if the protective coating becomes damaged or wears off over time, the steel flat bars will be more vulnerable to corrosion. Additionally, certain environmental factors, such as high humidity, saltwater exposure, or acidic conditions, can accelerate the corrosion process. Regular maintenance and inspection of steel flat bars are crucial to detect any signs of corrosion and apply appropriate measures to prevent further damage. This may include cleaning the surface, reapplying protective coatings, or replacing severely corroded sections.
Q:What are the different grades of steel used for flat bars?
There are several grades of steel used for flat bars, including low carbon steel (1018, A36), medium carbon steel (1045), high carbon steel (1095), alloy steel (4140), and stainless steel (304, 316). The choice of grade depends on the specific application and desired properties such as strength, durability, and corrosion resistance.
Q:What is the fire resistance of a steel flat bar?
The fire resistance of a steel flat bar depends on various factors such as the thickness and composition of the steel, as well as the duration and intensity of the fire. However, in general, steel has a high fire resistance due to its high melting point and low thermal conductivity. It can withstand fire for a significant amount of time before losing its structural integrity.
Q:What are the different types of surface coatings for steel flat bars?
Steel flat bars can be coated in various ways to enhance their properties and advantages. Here are some common options: 1. Zinc Galvanization: By applying a zinc layer, the steel flat bar gains protection against rust and corrosion. This makes it suitable for outdoor use or in high humidity areas. 2. Utilizing Powder Coating: Powder coating is a favored choice for steel flat bars due to its durability and attractive finish. It involves spraying dry powder onto the surface and then baking it to create a smooth and hard coating. 3. Opting for Epoxy Coating: Epoxy coatings are renowned for their exceptional adhesion and resistance to chemicals. They are commonly used in industrial settings where the flat bars are exposed to harsh conditions. 4. Applying Paint Coating: Paint coatings allow for customization in terms of color and finish. They provide a protective layer against corrosion and can be easily applied using spray or brush methods. 5. Chrome Plating: Chrome plating entails depositing a thin chromium layer onto the steel flat bar. This coating offers excellent durability and corrosion resistance, making it perfect for applications that require both strength and aesthetics. 6. Employing Black Oxide Coating: Black oxide coating chemically converts the surface of the steel flat bar, resulting in a black finish. It enhances appearance and offers mild corrosion resistance. These examples represent only a fraction of the available surface coatings for steel flat bars. The choice of coating depends on specific requirements such as corrosion resistance, aesthetics, and environmental factors. It is crucial to consider the intended use and conditions in order to select the most suitable coating for steel flat bars.
Q:How do steel flat bars perform in high-pressure applications?
Steel flat bars perform well in high-pressure applications due to their strength and durability. They can withstand the pressure exerted on them without deforming or breaking, making them suitable for use in various industries such as construction, manufacturing, and oil and gas. Additionally, steel flat bars have excellent corrosion resistance, ensuring their performance even in harsh environments.
Q:Can steel flat bars be used for structural purposes?
Yes, steel flat bars can be used for structural purposes. They are commonly used in construction projects for various applications such as support beams, braces, and framework due to their strength and durability.
Q:Can steel flat bars be used in marine applications?
Yes, steel flat bars can be used in marine applications. However, it is important to use a specific type of steel known as marine-grade or stainless steel for such applications. Regular steel is susceptible to corrosion and rust when exposed to saltwater or high humidity environments, which is common in marine settings. Marine-grade steel, on the other hand, is specifically designed to withstand the harsh conditions of the marine environment. It is resistant to corrosion, rust, and pitting, making it suitable for use in marine applications such as boat building, ship construction, and offshore platforms.

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