1. Product Overview
Carbon steel angle bar, also widely referred to as L-shaped steel angle or mild steel angle, is a core hot-rolled structural steel profile featuring a right-angle cross-section with two perpendicular legs. As a leading factory supplier, we specialize in the production and wholesale of high-standard carbon steel angle bars covering a full range of international and domestic mainstream grades, including Q235, Q345, ASTM A36, EN S235JR, S275JR, S355JR, JIS SS400, DIN St37 and St52. These angle bars are manufactured via advanced hot-rolling technology, boasting stable mechanical properties, precise dimensional tolerance, and excellent processing adaptability, serving as indispensable structural components for construction, machinery manufacturing, infrastructure, transportation, and metal fabrication industries worldwide.
Our carbon steel angle bars are available in two core configurations: equal angle bars (with identical leg lengths) andunequal angle bars (with differentiated leg lengths), to meet diverse engineering design and load-bearing requirements. We adhere to strict international production standards and quality inspection norms, ensuring each batch of products fully complies with corresponding material specifications and project application benchmarks.
2. Material Grades & Core Performance Characteristics
We offer a complete spectrum of carbon steel angle bar grades, categorized by strength level and regional application standards, with clear performance positioning to match different load-bearing and usage scenarios:
General-Purpose Low-Carbon Mild Steel Grades: Q235 (Chinese GB standard), S235JR (EN standard), A36 (ASTM standard), SS400 (JIS standard), St37 (DIN standard). These grades belong to low-carbon structural steel with a carbon content generally below 0.25%, featuring outstanding ductility, superior weldability, exceptional formability, and cost-effectiveness. They feature a minimum yield strength of 235MPa (Q235/S235JR/St37) to 250MPa (A36), suitable for light to medium-duty structural support, non-critical frame components, shelving, fencing, and general metal fabrication projects with moderate load demands.
Medium-Strength Carbon Steel Grades: S275JR (EN standard). This grade delivers enhanced mechanical properties compared to general mild steel, with a minimum yield strength of 275MPa and balanced tensile strength, bridging the gap between standard mild steel and high-strength steel. It offers improved load-bearing capacity while retaining excellent processing performance, ideal for medium-duty structural frames, industrial machinery supports, roof trusses, and infrastructure auxiliary components.
High-Strength Low-Alloy Carbon Steel Grades: Q345 (Chinese GB standard), S355JR (EN standard), St52 (DIN standard). As high-performance structural steel grades, they feature a minimum yield strength of 345MPa (Q345) to 355MPa (S355JR/St52), with optimized alloy composition for higher tensile strength, impact resistance, and structural stability. These grades are designed for heavy-duty, high-load engineering applications, including large building structures, bridge components, heavy machinery frames, power transmission towers, and industrial equipment supports, enabling thinner profiles while maintaining superior load capacity to reduce overall project weight and material costs.
3. Production Process & Quality Assurance
Our carbon steel angle bars are produced viahot-rolling process, the mainstream and optimal manufacturing process for structural steel angles. The production flow includes raw material smelting, continuous casting, high-temperature rolling, precision shaping, cooling, straightening, cutting, and quality inspection. This process ensures uniform internal grain structure, minimal internal stress, and consistent mechanical properties across the entire product length, avoiding defects such as cracks, warping, and dimensional deviation.
We implement full-process quality control: raw materials undergo strict chemical composition testing; semi-finished products are inspected for dimensional accuracy and surface quality; finished products are tested for yield strength, tensile strength, and elongation to verify compliance with corresponding grade standards. All products are accompanied by material test certificates (MTC) to trace production and performance data, guaranteeing reliability for engineering and industrial applications.
4. Specification Range & Customization Capabilities
We provide a comprehensive range of standard specifications and support customized production to meet diverse customer needs:
Equal Angle Bars: Leg dimensions ranging from 20mm×20mm to 200mm×200mm, leg thickness from 2mm to 20mm, covering all conventional small, medium, and large sizes.
Unequal Angle Bars: Standard leg combinations with typical ratios of 1.5:1 and 2:1, dimensions from 30mm×20mm to 160mm×100mm, thickness matching leg size for stable structural performance.
Standard Lengths: Conventional fixed lengths of 6m, 9m, and 12m; custom length cutting services available from 3m to 18m as per customer requirements.
Additional value-added processing services include surface anti-corrosion treatment, precision cutting, drilling, and bending, tailored to downstream fabrication and installation needs.
5. Core Applications
Our full-grade carbon steel angle bars are widely applied across multiple key industries, thanks to their versatile performance and strong adaptability:
Construction Industry: Building frame structures, wall keels, roof trusses, beam and column reinforcement, scaffolding components, and prefabricated building accessories.
Infrastructure Engineering: Bridge supports, guardrail frameworks, railway and highway auxiliary structures, drainage system supports, and power communication towers.
Machinery & Equipment Manufacturing: Industrial machinery frames, conveyor brackets, equipment bases, transmission device housings, and mechanical structural reinforcements.
Logistics & Storage: Warehouse shelving, pallet frames, storage rack supports, and logistics equipment components.
General Metal Fabrication: Fencing, railings, metal brackets, decorative steel structures, and various custom fabricated metal parts.
6. Supply Advantages
As a direct factory supplier, we offer competitive ex-factory prices, stable large-scale inventory for standard grades and specifications, short lead times, and flexible order quantities to support wholesale, bulk procurement, and customized orders. Our products comply with international trade standards, suitable for global distribution and cross-border engineering projects, with professional packaging to ensure product integrity during transportation.
We are committed to providing high-quality, high-performance carbon steel angle bars with consistent quality, complete specifications, and reliable after-sales support, serving as a trusted partner for global customers in structural steel procurement.
