1. Product Overview

GB angle steel, also known as hot-rolled carbon structural angle steel, is a standard L-shaped structural steel profile characterized by a rigid right-angle cross-section, available in both equal and unequal leg variants to suit diverse engineering and fabrication demands. As a professional bulk supplier specializing in high-quality carbon angle steel, we focus on the mass production and wholesale distribution of premium-grade angle steel conforming to Chinese GB national standards, covering three globally mainstream material grades: Q235, SS400, and ASTM A36. Manufactured via mature hot-rolling technology and strict quality supervision, our products feature stable mechanical properties, precise dimensional tolerances, excellent processing adaptability, and consistent batch quality, making them the preferred choice for global bulk buyers, construction contractors, machinery manufacturers, and metal fabricators seeking reliable structural steel solutions.

This series of angle steel is designed for universal applicability, balancing cost-efficiency and performance to meet the requirements of light to medium-duty structural applications. We specialize in bulk supply with large-scale inventory, ensuring stable delivery for large-volume orders, while upholding strict quality standards to maintain product consistency across every batch, fully complying with GB standard specifications and international quality benchmarks for cross-border trade and engineering projects.

2. Core Material Grades and Performance Attributes

Our high-quality GB angle steel is available in three widely recognized carbon structural steel grades, each with matched mechanical properties and regional standard compliance, ensuring seamless compatibility with global project requirements. All grades feature low carbon content, superior weldability, and exceptional formability, with clear performance positioning for targeted applications:

Q235 (GB National Standard): As the most commonly used general-purpose low-carbon structural steel in Chinese GB standards, Q235 features a minimum yield strength of 235MPa and tensile strength ranging from 375MPa to 500MPa. With a controlled carbon content below 0.25%, it offers outstanding ductility, easy machinability, and reliable weldability, ideal for general construction, light structural framing, and non-critical support components. This grade is the cornerstone of our bulk product line, offering unbeatable cost-efficiency for large-scale projects.

SS400 (JIS Standard): Corresponding to Japanese industrial standards, SS400 is a general-purpose carbon structural steel grade with performance parameters fully aligned with Q235, featuring a minimum yield strength of 245MPa and balanced tensile properties. It boasts strict surface quality control and uniform internal structure, with excellent adaptability to cutting, bending, and welding processes. Widely recognized in Asian and global markets, SS400 angle steel is suitable for general engineering, metal fabrication, and infrastructure auxiliary components, ensuring consistent performance in bulk applications.

ASTM A36 (US Standard): A globally accepted general-purpose carbon structural steel grade under ASTM international standards, A36 features a minimum yield strength of 250MPa and tensile strength between 400MPa and 550MPa. It offers enhanced toughness and dimensional stability, complying with international trade and engineering quality norms, making it highly suitable for global construction projects, mechanical equipment frames, and cross-border engineering applications. This grade bridges regional standard gaps, providing a versatile solution for international bulk buyers.

3. Product Specifications and Quality Compliance

All our angle steel products are produced in strict accordance with GB/T 706 (hot-rolled equal and unequal angle steel) national standards, covering a full range of conventional specifications to meet diverse bulk procurement needs. We offer both equal angle steel (with identical leg lengths) and unequal angle steel (with differentiated leg lengths), with leg dimensions ranging from 25mm×25mm up to 200mm×200mm for equal variants, and 30mm×20mm up to 160mm×100mm for unequal variants. Leg thickness ranges from 2mm to 20mm, with standard fixed lengths of 6m, 9m, and 12m; customized length cutting is also available for bulk orders to meet specific project requirements.

Every batch of our angle steel undergoes rigorous quality inspection to ensure full compliance with GB standards and corresponding material grade specifications. Dimensional tolerances are strictly controlled to eliminate warping, distortion, and surface defects, with smooth, burr-free surfaces and uniform internal grain structure. We conduct comprehensive mechanical property testing, including yield strength, tensile strength, and elongation verification, ensuring consistent quality across all bulk shipments and meeting the quality requirements of large-scale engineering and industrial applications.

4. Production Process and Bulk Supply Advantages

Our GB angle steel is manufactured through a fully automated, large-scale hot-rolling production line, the industry-standard process for structural steel profiles. The production workflow includes high-quality raw material billet selection, precise chemical composition control, high-temperature continuous rolling, online dimensional calibration, stress-relief straightening, fixed-length cutting, and final quality inspection. This standardized mass production process ensures stable product performance, minimal internal defects, and consistent batch quality, laying the foundation for reliable bulk supply.

As a professional bulk supplier, we offer distinct advantages for large-volume buyers: first, large-scale inventory of Q235, SS400, and A36 grade angle steel in all conventional specifications, enabling fast order fulfillment and short lead times to avoid project delays; second, direct ex-factory bulk pricing with no intermediate links, maximizing cost savings for wholesale buyers; third, flexible order customization, supporting mixed-grade and mixed-specification bulk orders to meet diverse customer needs; fourth, professional export packaging and logistics support, ensuring product integrity during long-distance transportation, and complete qualification documents including material test certificates (MTC) for smooth customs clearance and project acceptance.

5. Core Industrial Applications

Our high-quality Q235, SS400, and A36 GB angle steel is widely applied across numerous key industries due to its versatile performance and reliable quality, serving as a fundamental structural material for bulk consumption scenarios. Primary applications include construction engineering (building frames, wall keels, roof trusses, railings, scaffolding, and prefabricated building components), machinery manufacturing (equipment brackets, machine frames, protective casings, and structural reinforcements), logistics and storage (warehouse shelving, storage racks, and pallet frames), infrastructure engineering (road and bridge guardrails, municipal engineering supports, and drainage system components), and general metal fabrication (fencing, decorative steel structures, and custom fabricated metal parts). Its universal compatibility and cost-effective performance make it indispensable for large-scale bulk use in various engineering and industrial fields.

6. Commitment to Quality and Bulk Service

We adhere to the principle of "quality first, customer-centric" for all bulk supply operations, implementing strict quality control from raw material procurement to finished product delivery to ensure every batch of angle steel meets high-quality standards. With years of experience in bulk steel sales and cross-border supply, we provide professional technical support, accurate quotation services, and efficient logistics coordination for global customers. Whether for large-scale engineering projects, long-term factory procurement, or international wholesale distribution, we are committed to delivering high-quality GB angle steel with stable performance, competitive bulk pricing, and reliable supply services, establishing long-term cooperative partnerships with customers worldwide.