ANGLE BAR

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Specifications of Angle Steel

1. Invoicing on theoretical weight or actual weight as customer request

2. Length: 6m, 9m, 12m as following table

3. Sizes

Angle Steel

Sizes: 25mm-250mm
a*t
25*2.5-4.0	70*6.0-9.0	130*9.0-15
30*2.5-6.6	75*6.0-9.0	140*10-14
36*3.0-5.0	80*5.0-10	150*10-20
38*2.3-6.0	90*7.0-10	160*10-16
40*3.0-5.0	100*6.0-12	175*12-15
45*4.0-6.0	110*8.0-10	180*12-18
50*4.0-6.0	120*6.0-15	200*14-25
60*4.0-8.0	125*8.0-14	250*25

5. Payment terms:

1).100% irrevocable L/C at sight.

2).30% T/T prepaid and the balance against the copy of B/L.

3).30% T/T prepaid and the balance against L/C

6.Material details:

Alloy No	Grade	Element (%)
		C	Mn	S	P	Si
		C	Mn	S	P	Si

Q235	B	0.12—0.20	0.3—0.7	≤0.045	≤0.045	≤0.3

Alloy No	Grade	Yielding strength point( Mpa)
		Thickness (mm)
		≤16	＞16--40		＞40--60	＞60--100
		≥

Q235	B	235		225	215	205
Alloy No	Grade	Tensile strength (Mpa)	Elongation after fracture (%)
		Tensile strength (Mpa)	Thickness (mm)
			≤16	＞16--40	＞40--60	＞60--100
			≥

Q235	B	375--500	26	25	24	23

Usage & Applications of Angle Steel

According to the needs of different structures, Angle can compose to different force support component, and also can be the connections between components. It is widely used in various building structures and engineering structures such as roof beams, bridges, transmission towers, hoisting machinery and transport machinery, ships, industrial furnaces, reaction tower, container frame and warehouse etc.

Packaging & Delivery of Angle Steel

1. Packing: it is nude packed in bundles by steel wire rod

2. Bundle weight: not more than 3.5MT for bulk vessel; less than 3 MT for container load

3. Marks:

Color marking: There will be color marking on both end of the bundle for the cargo delivered by bulk vessel. That makes it easily to distinguish at the destination port.

Tag mark: there will be tag mark tied up on the bundles. The information usually including supplier logo and name, product name, made in China, shipping marks and other information request by the customer.

If loading by container the marking is not needed, but we will prepare it as customer request.

Production flow of Angle Steel

Material prepare (billet) —heat up—rough rolling—precision rolling—cooling—packing—storage and transportation

Q:What are the different methods of surface preparation for painting steel angles?: There are several methods of surface preparation for painting steel angles, each of which have their own benefits and considerations. 1. Manual cleaning: This method involves using hand tools such as wire brushes, sandpaper, or scrapers to remove loose rust, mill scale, and other contaminants. While it is a cost-effective option, it may not be suitable for large-scale projects or areas that are difficult to access. 2. Power tool cleaning: Power tools like grinders, sanders, or wire wheels can be used to mechanically remove rust, scale, and old paint from the surface of steel angles. This method is more efficient than manual cleaning and can be used in larger projects, but proper safety precautions and protective gear should be used. 3. Chemical cleaning: Chemical cleaning involves using solvents or acidic solutions to dissolve rust and remove contaminants from the steel surface. This method is effective for heavily corroded or hard-to-reach areas, but it requires careful handling and disposal of the chemicals. 4. Abrasive blasting: Abrasive blasting, also known as sandblasting, uses compressed air to propel abrasive materials such as sand, grit, or glass beads onto the surface of steel angles. This method is highly effective in removing all types of contaminants, providing a clean and rough surface for paint adhesion. However, it requires specialized equipment and should be conducted by trained professionals due to potential health hazards. Regardless of the method chosen, it is essential to ensure that the steel angles are thoroughly cleaned and free from contaminants before painting. This will help to achieve better paint adhesion, prolong the lifespan of the coating, and enhance the overall durability of the steel structure.

Q:What is the difference between hot-rolled and cold-rolled steel angles?: Two distinct methods, hot-rolling and cold-rolling, are employed in the production of steel angles, resulting in varying characteristics. Hot-rolling involves heating a steel billet or ingot to a high temperature and subsequently passing it through a series of rollers. This process allows for the metal to be shaped and formed while it retains its malleability and pliability. Consequently, hot-rolled steel angles possess a coarser surface finish and less precise dimensions when compared to their cold-rolled counterparts. However, their strength and durability are generally superior, rendering them appropriate for structural applications necessitating high strength and load-bearing capacity. Conversely, cold-rolling entails passing hot-rolled steel through a sequence of rollers at room temperature. This procedure not only refines the dimensions and surface finish of the steel angles but also enhances their strength and hardness. Cold-rolled angles exhibit a smoother surface finish and more accurate dimensions, making them ideal for applications requiring precise fitting or a polished appearance. They are commonly employed in architectural and decorative endeavors, as well as in industries where aesthetics and precision are paramount. To summarize, the primary disparities between hot-rolled and cold-rolled steel angles lie in their manufacturing processes, surface finishes, dimensional accuracy, and applications. Hot-rolled angles are stronger and rougher, rendering them suitable for structural purposes, whereas cold-rolled angles possess a smoother finish and precise dimensions, making them more appropriate for decorative and architectural applications.

Q:What are the welding techniques used for steel angles?: There are several welding techniques that can be used for steel angles, depending on the specific application and desired outcome. Some of the commonly used welding techniques are: 1. Shielded Metal Arc Welding (SMAW): Also known as stick welding, SMAW involves the use of a consumable electrode coated in flux. This technique is versatile, cost-effective, and suitable for various thicknesses of steel angles. 2. Gas Metal Arc Welding (GMAW): Also known as MIG (Metal Inert Gas) welding, GMAW uses a wire electrode fed through a welding gun. The wire is melted and joined with the base metal, while an inert gas shield protects the weld from atmospheric contamination. GMAW is commonly used for thin to medium thickness steel angles. 3. Flux-Cored Arc Welding (FCAW): Similar to GMAW, FCAW uses a continuous wire electrode. However, the wire is filled with flux, eliminating the need for an external shielding gas. FCAW is suitable for both indoor and outdoor applications and is known for its high deposition rates. 4. Gas Tungsten Arc Welding (GTAW): Also known as TIG (Tungsten Inert Gas) welding, GTAW utilizes a non-consumable tungsten electrode and a separate filler metal if needed. This technique produces high-quality, precise welds and is commonly used for thinner steel angles or when a high degree of control is required. 5. Submerged Arc Welding (SAW): SAW involves the use of a continuously fed wire electrode submerged in a granular flux. The flux acts as a protective layer, preventing atmospheric contamination and enhancing weld quality. SAW is commonly used for thicker steel angles or in situations where high deposition rates are required. It is important to consider factors such as the thickness of the steel angles, the environment in which the welding will take place, and the desired quality and strength of the weld when selecting the appropriate welding technique. Consulting with a professional welder or engineer can help determine the best technique for a specific application.

Q:How do you connect two steel angles together?: One common method to connect two steel angles together is through welding. Welding is the process of melting the edges of the angles and fusing them together using an electric arc or flame. This creates a strong and permanent connection between the two angles. Prior to welding, it is important to prepare the surfaces by cleaning them from any contaminants or rust. Additionally, aligning the angles properly and securing them in place with clamps or tack welds helps to ensure a precise and accurate connection. Another option to connect steel angles is through the use of bolts or screws. This method involves drilling holes through the angles and then using nuts and bolts or screws to fasten them together. It is crucial to select appropriate fasteners and ensure they are tightened securely to achieve a strong connection.

Q:How are steel angles defined?: Steel angles are defined by their shape and dimensions. They are L-shaped structural members made of steel with two perpendicular legs of equal or unequal lengths. The angle between the legs can range from 90 to 180 degrees, depending on the specific design and application. Steel angles are commonly used in construction and engineering projects to provide structural support, reinforcement, and stability. The dimensions of steel angles are typically specified by their leg length, thickness, and overall length. These dimensions determine the strength, load-bearing capacity, and versatility of the angle, making it suitable for various applications in different industries. Steel angles are also available in various finishes, such as galvanized or painted, to enhance their durability and resistance to corrosion.

Q:Can steel angles be used for decorative trims?: Yes, steel angles can be used for decorative trims. Steel angles can be shaped and cut to create various decorative designs and patterns, making them a versatile option for adding aesthetic appeal to architectural or interior projects. Additionally, steel angles offer durability and strength, ensuring that the decorative trims will be long-lasting and able to withstand wear and tear.

Q:Are there any industry standards or certifications for steel angles?: Steel angles have industry standards and certifications. The main standard for steel angles is the ASTM standard, specifically the ASTM A36 specification. This specification outlines the necessary chemical composition, mechanical properties, and dimensional tolerances for structural steel angles. Aside from ASTM, other organizations like AISC and SJI also provide guidelines and standards for steel angles used in construction and structural engineering. These standards guarantee that steel angles meet specific requirements in terms of quality, strength, and performance. Moreover, certifications like ISO 9001:2015 and ISO 14001:2015 are widely recognized in the steel industry. These certifications indicate that a manufacturer has implemented a quality management system and complies with environmental management standards. Adhering to these industry standards and certifications is crucial for manufacturers, suppliers, and construction professionals. It ensures the dependability and safety of steel angles in various applications.

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 are the different types of steel angles used in door and window frames?: There are several types of steel angles commonly used in door and window frames, each offering unique benefits and applications. 1. L-shaped Angle: This is the most common type of steel angle used in door and window frames. It features a 90-degree angle and is typically used to provide structural support and reinforcement. L-shaped angles are versatile and can be easily welded or bolted into place, making them suitable for various frame designs. 2. T-shaped Angle: As the name suggests, T-shaped angles have a cross-section resembling the letter "T." They are often used to provide additional strength and stability to door and window frames. T-shaped angles are commonly used in heavy-duty applications where increased load-bearing capacity is required. 3. Equal Angle: Equal angles have two equal sides that form a 90-degree angle. They are commonly used in door and window frames that require equal support on both sides. These angles are suitable for applications where symmetry and balance are important, ensuring that the frame remains stable and level. 4. Unequal Angle: Unlike equal angles, unequal angles have two sides of different lengths. They are commonly used in door and window frames that require varying degrees of support on each side. Unequal angles are versatile and can be used to compensate for differences in wall thickness or other structural considerations. 5. Slotted Angle: Slotted angles are often used in door and window frames that require adjustable or modular designs. They feature a series of holes or slots along their length, allowing for easy attachment and customization. Slotted angles are commonly used in DIY projects or applications where flexibility and adjustability are desired. It is worth noting that the choice of steel angle for door and window frames depends on various factors such as the specific application, load-bearing requirements, and aesthetic considerations. Consulting with a structural engineer or a professional in the field can help determine the most suitable type of steel angle for a particular project.

Q:What are the different types of steel angles available?: There are several different types of steel angles available, each designed for specific applications and purposes. Some common types include: 1. Equal Angle: Also known as L-shaped angles, these steel angles have equal side lengths and are often used for general structural and construction purposes. They provide excellent support and stability when connected to other structural components. 2. Unequal Angle: As the name suggests, unequal angles have different side lengths. These angles are commonly used in applications where one side needs to be longer or shorter than the other, such as supporting uneven loads or creating specific shapes. 3. Stainless Steel Angle: These angles are made from stainless steel, which is highly resistant to corrosion, making them suitable for applications where exposure to moisture or chemicals is a concern. They are often used in food processing plants, chemical industries, and marine environments. 4. Galvanized Angle: Galvanized steel angles are coated with a layer of zinc, providing excellent corrosion resistance. This makes them ideal for outdoor applications or areas with high humidity or saltwater exposure. 5. Rolled Steel Angle: Rolled steel angles are manufactured by rolling hot-rolled steel into the desired shape. This process enhances the strength and durability of the angle, making it suitable for heavy-duty applications. 6. Slotted Angle: Slotted angles have holes or slots along their length, allowing for easy attachment and adjustment. They are commonly used in shelving systems, workbenches, and storage racks, as they offer a versatile and customizable solution. 7. Structural Steel Angle: These angles are typically used in construction projects requiring load-bearing support. They are designed to withstand heavy loads and provide structural stability in buildings, bridges, and other infrastructure projects. It is important to consider the specific requirements of your project before choosing the appropriate type of steel angle. Consulting with a structural engineer or steel supplier can ensure that you select the right angle for your application.

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