hot rolled Q235 steel angle bar with best price

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Quick Details

Standard:GB, JIS
Dimensions:20*0.8-20*3
Grade:Q195-Q420 Series
Place of Origin:Hebei, China (Mainland)
Brand Name:DH
Model Number:2.5#
Type:Equal
Application:building

Packaging & Delivery

Packaging Details:	400 pcs/ bundle
Delivery Detail:	15 days

Specifications

Q235 SS400 hot rolled
20*0.8-200*25
high quality low price and good service

Product Description

specifications: 20mm*20mm*0.8mm -20mm*20mm*3mm

2.5mm*25mm*0.8mm- 25mm*25mm*3mm

30mm*30mm*0.8mm -30mm*30mm*4mm

3.5mm*35mm*0.8mm- 35mm*35mm*4mm

38mm*38mm*0.8mm -38mm*38mm*4mm

40mm*40mm*0.8mm -40mm*40mm*5mm

50mm*50mm*0.8mm -50mm*50mm*5mm

length: 5.5m 5.8m 6m 9m 12m

our advantage: 1. thickness can be 0.8mm

2. bottom price

3.reliable quality and service

4. fast delivery

Q:Are steel angles available in different finishes?: Yes, steel angles are available in different finishes. Common finishes for steel angles include mill finish, hot-dip galvanized, powder-coated, and painted finishes.

Q:Can steel angles be painted?: Yes, steel angles can be painted. The steel angles need to be properly cleaned, primed, and then painted using a suitable paint for metal surfaces.

Q:How are steel angles welded or joined together?: Steel angles are commonly welded or joined together using different welding techniques. The most common method is by using arc welding, which includes processes like shielded metal arc welding (SMAW), gas metal arc welding (GMAW), and flux-cored arc welding (FCAW). In shielded metal arc welding, an electric arc is created between a coated electrode and the steel angle, melting the metals and forming a weld joint. Gas metal arc welding utilizes a continuous wire electrode and a shielding gas, such as argon or a mixture of argon and carbon dioxide, to protect the weld from atmospheric contaminants. Flux-cored arc welding uses a hollow wire electrode with flux inside, which creates a shielding gas and slag to protect the weld. Another method for joining steel angles is by using resistance welding. This technique involves applying pressure and passing an electric current through the joint area, which generates heat and forms a weld. Resistance welding methods commonly used for steel angles include spot welding and seam welding. Additionally, steel angles can be joined together through stud welding. Stud welding involves placing a threaded or unthreaded stud against the steel angle and using an arc welding process to fuse the stud to the angle. It is important to note that the specific welding or joining method used for steel angles depends on factors such as the thickness and type of steel, the desired strength of the joint, and the application requirements.

Q:How do steel angles compare to wooden or concrete structural elements?: Steel angles have several advantages over wooden or concrete structural elements. Firstly, steel angles have a higher strength-to-weight ratio, making them capable of supporting heavier loads with less material. This allows for more efficient structural designs and reduces the overall weight of the structure. Additionally, steel angles have better resistance to fire, pests, and moisture, eliminating concerns related to rotting, termite damage, or decay. Moreover, steel angles provide greater flexibility in terms of design and can be easily modified or extended if needed. Lastly, steel angles offer increased durability and longevity, requiring less maintenance and having a longer lifespan compared to wooden or concrete elements.

Q:Can steel angles be used in marine or coastal environments?: Marine or coastal environments can accommodate steel angles. These angle irons are commonly employed in various construction projects, including those situated near the sea. Nevertheless, it is important to opt for the appropriate steel angle variant that possesses corrosion resistance properties capable of enduring the harsh effects of saltwater, moisture, and constant exposure to sea spray. Stainless steel angles are an exceptional alternative for marine or coastal applications due to their superior resistance against corrosion. The presence of chromium in stainless steel enables the formation of a protective oxide layer on its surface, thus warding off rust and corrosion. Consequently, stainless steel angles exhibit remarkable resilience against the corrosive impact of saltwater and moisture. Another viable option for marine or coastal environments is galvanized steel angles. The process of galvanization involves coating steel with a layer of zinc, which serves as a sacrificial barrier against corrosion. This protective zinc coating effectively prevents the underlying steel from succumbing to rust and deterioration when subjected to saltwater or high humidity conditions. The proper maintenance and care of steel angles in marine or coastal environments are of utmost importance. Regular inspection, cleaning, and the application of suitable protective coatings contribute to prolonging the lifespan of steel angles and preserving their structural integrity in the face of corrosive elements. In conclusion, steel angles are indeed suitable for marine or coastal environments. However, it is imperative to carefully select the appropriate type of steel angle that possesses adequate corrosion resistance properties, such as stainless steel or galvanized steel. Furthermore, the proper maintenance and care of these angles are essential in ensuring their longevity and structural integrity.

Q:What is the difference between galvanized and black steel angles?: There are two types of steel angles: galvanized and black steel angles. These two types have different characteristics and uses. Galvanized steel angles are coated with a layer of zinc, providing protection against corrosion. To achieve this, the steel angles are immersed in molten zinc, allowing the zinc to bond with the steel surface. This zinc coating increases the durability and lifespan of the steel angles, making them resistant to rust and other forms of corrosion. Galvanized steel angles are commonly utilized in outdoor applications, such as construction projects, fencing, and marine environments where exposure to moisture and harsh weather conditions is a concern. On the other hand, black steel angles are not coated with any protective layer. They are made from raw steel, giving them a black appearance. Black steel angles are typically employed in indoor applications, such as structural support, framing, and general fabrication. Due to their lack of protection against corrosion, they are not suitable for outdoor use or environments with high moisture content. In conclusion, the key distinction between galvanized and black steel angles lies in their coating and resistance to corrosion. Galvanized steel angles possess a zinc coating that shields them from rust and corrosion, making them suitable for outdoor applications. Conversely, black steel angles lack any protective coating and find their primary use indoors for structural support and general fabrication purposes.

Q:What is the process of cold bending steel angles?: Manipulating steel angles into a desired shape without using heat is the process of cold bending. This involves applying force or pressure to the angles in a controlled manner. To begin, a bending machine or fixture securely holds the steel angle in place during bending. The operator then determines the desired angle and bend radius, which dictate the required force. Subsequently, pressure is gradually applied by the bending machine or fixture to bend the steel angle to the desired shape. This force is applied slowly and evenly to prevent any deformation or damage. Throughout the bending process, it is crucial to monitor the angle and ensure even and smooth bending. Adjustments to the pressure or angle may be necessary to achieve the desired shape. Once the steel angle has been bent to the desired angle, it is cautiously removed from the bending machine or fixture to prevent any distortion or damage. Cold bending steel angles have various advantages over hot bending, including reduced risk of material distortion or weakening caused by heat. It also allows for more precise and controlled bending, making it ideal for applications where accuracy is vital. In conclusion, cold bending steel angles involves securely positioning the angle in a bending machine or fixture, applying gradual and controlled pressure to bend it to the desired shape, and carefully removing the bent angle for further use.

Q:What is the difference between hot-rolled and cold-rolled steel angles?: Hot-rolled and cold-rolled steel angles refer to two different manufacturing processes used to create steel angles with varying characteristics. Hot-rolled steel angles are produced by heating a steel billet or ingot to a high temperature and then passing it through a series of rollers. This process allows for the metal to be shaped and formed while it is still in a malleable and pliable state. As a result, hot-rolled steel angles tend to have a rougher surface finish and less precise dimensions compared to cold-rolled angles. However, they are generally stronger and more durable, making them suitable for structural applications that require high strength and load-bearing capacity. On the other hand, cold-rolled steel angles are created by passing hot-rolled steel through a series of rollers at room temperature. This process not only helps to refine the dimensions and surface finish of the steel angles but also increases their strength and hardness. Cold-rolled angles have a smoother surface finish and more accurate dimensions, which makes them ideal for applications that require a precise fit or a smoother appearance. They are commonly used in architectural and decorative applications, as well as in industries where aesthetics and precision are important. In summary, the main differences between hot-rolled and cold-rolled steel angles lie in their manufacturing processes, surface finish, dimensional accuracy, and applications. Hot-rolled angles are stronger and rougher, suitable for structural purposes, while cold-rolled angles have a smoother finish and precise dimensions, making them more suitable for decorative and architectural applications.

Q:Are steel angles resistant to chemical exposure?: Yes, steel angles are generally resistant to chemical exposure. Steel is known for its high strength and durability, making it less susceptible to damage from chemical substances. However, the level of resistance can vary depending on the specific chemical and the type of steel used. In highly corrosive environments or with prolonged exposure to aggressive chemicals, certain types of steel angles may require additional protective coatings or treatments to enhance their resistance. It is always recommended to consult with experts or refer to specific material specifications to ensure the appropriate steel angles are chosen for the intended chemical exposure.

Q:How are steel angles supported during installation?: Steel angles are typically supported during installation using structural supports such as brackets, beams, or frames. These supports ensure the angles are securely held in place, allowing for proper alignment and stability.

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