Round steel is a type of smooth-surfaced, ribless cylindrical rebar with a uniform circular cross-section. Typically made from low-carbon or ordinary carbon steel, it offers good plasticity and toughness, making it easy to bend, tie, and weld. Due to the absence of surface ribs, its bonding with concrete relies primarily on friction, which makes it more suitable for components subjected to lower loads—such as tie columns, ring beams, and distribution bars in floor slabs—or as auxiliary reinforcement. In construction, round steel is commonly used as stirrups, connection bars, or reinforcement for temporary support structures. Compared with deformed rebar, round steel has slightly weaker mechanical interlocking with concrete, but its simplicity and ease of fabrication make it an essential basic steel material in building projects.

Deformed steel bar, also known as rebar, is a type of reinforcing steel featuring longitudinal and transverse ribs on its surface. These ribs—typically crescent-shaped, spiral, or herringbone—significantly enhance the bonding strength between the steel and concrete, allowing them to form an integrated structure that jointly resists external forces. As the "skeleton" of concrete structures, rebar plays a critical role in improving tensile and shear strength. Depending on material composition—such as ordinary hot-rolled rebar or thermomechanically treated rebar—and available in various grades and specifications, it meets a wide range of strength requirements for construction projects. Rebar is widely used in buildings, bridges, tunnels, water conservancy facilities, and other structural applications. Compared to plain round steel, the mechanical interlocking provided by the ribbed surface greatly enhances structural integrity and load-bearing capacity, making deformed rebar an indispensable material in modern civil engineering.

Steel plate is a flat steel product made from raw steel through processes such as rolling, forging, or casting. As one of the fundamental materials in modern industry and construction, it features high strength, good plasticity, and long-term durability. By adjusting its material composition (e.g., carbon steel, alloy steel, stainless steel) and manufacturing method (cold rolling or hot rolling), steel plates can be engineered to meet specific mechanical requirements such as compression resistance, tensile strength, and wear resistance.In terms of appearance, steel plates may present smooth surfaces, fine textures, or specialized coatings, offering both a solid metallic feel and dimensional stability. They are easily processed by cutting, welding, or bending into various shapes and forms. Steel plates are widely used in structural applications like machinery manufacturing and the automotive industry, as well as in architectural scenarios as curtain walls or decorative panels. With their crisp lines and robust presence, they create a strong visual contrast when paired with transparent materials such as glass, bringing industrial aesthetics, modernism, or refinement to architectural spaces.

Angle steel is a type of long steel with an L-shaped cross-section, typically produced by hot rolling or cold bending. It mainly comes in two types: equal angle steel (with equal side widths) and unequal angle steel (with different side widths). Its specifications are usually expressed as side width × side width × thickness in millimeters (e.g., 50×50×5). Featuring high bending resistance and structural stability, angle steel is easy to connect and install. Widely used in building structures such as steel beams and trusses, as well as in mechanical manufacturing, transmission towers, and bridge supports, angle steel can serve as a standalone load-bearing component or be assembled into various structural parts. It is one of the most commonly used structural steel materials in engineering due to its low cost, high strength, and ease of construction.

Channel steel is a type of long steel with a groove-shaped cross-section, typically processed through hot rolling or cold bending. Its cross-section resembles the shape of "[", consisting of a web and two flanges on either side. Based on manufacturing processes, it can be classified into hot-rolled channel steel (such as the [20 model in GB/T 706) and cold-formed channel steel (such as C-channel). Specifications are expressed as web height × flange width × web thickness (e.g., [100×48×5.3). Channel steel features high unidirectional bending resistance and ease of assembly and connection. It is widely used in building steel structures (beam-column systems, industrial roof frames), mechanical manufacturing (equipment frames), and vehicle and ship construction (frame structures). It can function as an individual load-bearing component or be welded into composite cross-section members such as I-beams or box columns, making it a vital material for structural support and load-bearing in engineering applications.

I-beam steel is a type of hot-rolled long steel with an I-shaped cross-section, consisting of parallel upper and lower flanges connected by a vertical web, forming an efficient mechanical structure. Based on flange width, it is classified into standard I-beams (e.g., I20a) and wide-flange H-beams (e.g., HW200×200). Specifications are expressed as web height × flange width × web thickness (e.g., I250×116×8). Its unique cross-sectional design provides good bending resistance and structural stability in the vertical direction while maintaining a relatively light weight horizontally. The material distribution aligns with engineering mechanics principles. I-beam steel is primarily used in load-bearing scenarios such as main beams in building structures, columns in industrial buildings, and bridge frameworks. It can also be combined to form larger load-bearing assemblies. As a key load-bearing component in steel structure engineering, it offers high load efficiency, convenient installation, and good cost-effectiveness.

Round steel pipe is a type of pipe with a hollow circular cross-section. According to the manufacturing process, it can be classified into seamless steel pipes (produced by hot rolling or cold drawing through perforation) and welded steel pipes (formed by rolling and welding steel plates). Its specifications are expressed as outer diameter × wall thickness (e.g., Φ50×3mm). It features isotropic stress distribution, outstanding torsional resistance, and high cross-sectional efficiency. Round steel pipes are widely used in building structures (such as space trusses and truss joints), mechanical manufacturing (hydraulic cylinders, drive shafts), fluid transportation (oil pipelines, water supply and drainage systems), and municipal engineering (guardrail supports, light poles). They can serve as individual load-bearing components or be assembled into complex spatial structures via intersecting welds. Combining structural efficiency with economic advantages, round steel pipe is one of the most commonly used pipe types in modern engineering.

Rectangular and square steel tubes are hollow steel pipes with square or rectangular cross-sections, typically produced through hot rolling or cold bending and welding processes. Based on shape, they can be divided into square tubes (equal length and width, e.g., 50×50×3mm) and rectangular tubes (unequal length and width, e.g., 60×40×2.5mm). These pipes feature large moment of inertia, good bending and torsional resistance, and smooth surfaces that facilitate easy connection. They are widely used in building steel structures (columns, curtain wall frames), machinery manufacturing (equipment frames), decorative projects (guardrails, display racks), and transportation (vehicle frames). Square and rectangular tubes can function as independent load-bearing components or be welded into grid structures. Their sharp-edged appearance not only meets structural load requirements but also aligns with modern architectural aesthetics, making them essential materials in contemporary steel structure engineering and industrial manufacturing.

Special-shaped steel tubes refer to steel pipes with cross-sections that deviate from conventional shapes like circles or squares. They are typically produced through cold bending, welding, or hot extrusion processes, and come in a variety of cross-sectional forms such as oval, triangular, trapezoidal, D-shaped, and hexagonal tubes. These pipes combine structural functionality with aesthetic appeal—while meeting specific mechanical performance needs (e.g., directional bending resistance or anisotropic loading), they also serve design and assembly requirements in architecture and machinery. Special-shaped steel tubes are widely used in areas with unique shape demands, including architectural curtain walls (decorative elements), furniture manufacturing (frame structures), automotive industry (vehicle skeletons), and stage equipment (truss systems). They can serve both as load-bearing structural components and decorative features, embodying the modern engineering principle that "form follows function." As such, they represent both a functional extension and an aesthetic upgrade of traditional steel tubing.

Heavy-duty embedded steel plates serve as critical structural supports and concealed connection components pre-installed within reinforced concrete structures. Typically fabricated from high-quality carbon structural steel or low-alloy high-strength steel, these plates undergo galvanization and other anti-corrosion treatments to ensure long-term durability. During construction, they are welded or tied to the rebar framework before concrete pouring, becoming permanently integrated with the concrete once cured. These plates provide a stable, load-bearing foundation for attaching structural elements such as curtain walls and steel frames. They help evenly distribute loads, enhance structural safety and stability, and improve construction efficiency. Widely used in industrial plants, high-rise buildings, bridges, subways, and other infrastructure projects, embedded steel plates are essential components for modern construction requiring both strength and functionality. Carbon Structural Steel: Common grades include the Q235 series.Low-Alloy High-Strength Steel: Such as the Q355 series (e.g., Q355B, Q355C)Stainless Steel: Common options include 304 and 316 stainless steel embedded plates.

The high-security smart aluminum alloy system window is a high-end window type that integrates intelligent technology and system door and window technology. Through temperature, humidity, wind, rain, light, and other sensors and Internet of Things technology, it realizes the functional upgrade of "environmental perception—active response—intelligent linkage." Its core advantages are: Built-in sensors can automatically adjust the opening and closing of window sashes, such as intelligent ventilation when air quality decreases, and automatic closing and locking when wind and rain come; it supports multiple controls such as mobile phone apps, voice commands, touch panels, and links with smart homes, such as air conditioning and fresh air systems, to optimize energy consumption and comfort; It adopts broken bridge aluminum multi-cavity profiles, low-E hollow glass (filled with inert gas), and a three-glass two-cavity structure, combined with magnetic sealing strips and imported intelligent hardware (such as electric handles and anti-fall chains), significantly improving thermal insulation, sound insulation, and safety performance (sound insulation of more than 40 dB and thermal conductivity as low as 0.8-1.5 W/(㎡・K)); the security level is equipped with anti-pry alarms, tilt monitoring, and other devices, and high-rise scenes are equipped with overload-bearing anti-fall systems as standard. It is suitable for scenarios with high requirements for intelligence, comfort, and safety, such as high-end residences, office buildings, and medical facilities. 

The low-noise aluminum alloy sliding window uses aviation-grade aluminum alloy profiles as the frame and achieves smooth translation of the window sash through a precision double-track pulley system, integrating innovative technology on the basis of simplicity and practicality. The profile adopts a thermal bridge structure and nano-ceramic coating technology to improve strength, thermal insulation, and durability, and it supports diversified texture customization. The window sash is equipped with low-E hollow glass as standard; the coating layer can reflect ultraviolet and infrared rays and is filled with inert gas to improve the thermal insulation effect and is equipped with multiple sealing strips to enhance the sound insulation performance. High-end products are equipped with magnetic sealing technology. The strips fit tightly to the track through magnetic force, and the hidden stepped drainage groove significantly improves the water tightness. The silent damping pulley uses engineering plastic bearings and shock-absorbing rubber pads to achieve low-noise sliding and support oversized design. From residential space optimization to commercial transparent partitions, aluminum alloy sliding windows balance space utilization and user experience with technological upgrades.