Q235-Q345 Hot Rolled Equal Angle Steel 90 Degree ASTM A36 Hr Ms Carbon Steel Angles Steel Angle 75*75*6mm MID Steel Angle Iron Metal Angle Steel

This product line covers high-quality hot-rolled (HR) equal angle steel, also referred to as mild steel (MS) angle iron or metal angle steel, engineered with a precise 90-degree symmetrical L-shaped cross-section. It features multiple globally recognized carbon structural steel grades-Q235, Q345, and ASTM A36-and includes a fixed standard specification of 75mm×75mm×6mm, designed to deliver stable mechanical performance, strict dimensional accuracy, and exceptional structural reliability for diverse industrial and construction applications. As a fundamental structural section steel, this hot-rolled equal angle steel combines superior processability, cost-efficiency, and durability, adhering to international standards to meet the load-bearing and fabrication needs of large-scale projects, machinery manufacturing, and structural engineering.

Core Material Grades & Mechanical Performance

Our equal angle steel is available in three mainstream carbon structural steel grades, each complying with relevant international and national standards, with distinct mechanical properties to suit different load-bearing requirements, ensuring versatility and adaptability across various application scenarios.

1. Q235 & Q345 Carbon Steel Angles

Q235 and Q345 are widely used general-purpose carbon structural steel grades, with the letter "Q" denoting yield strength. Q235 features a minimum yield strength of 235 MPa, offering reliable performance for light to medium-duty structural applications, with low carbon content, excellent weldability, and formability, making it a cost-effective choice for routine construction and auxiliary structures. Q345, a high-strength low-alloy carbon steel, boasts a minimum yield strength of 345 MPa, significantly higher than Q235, delivering enhanced load-bearing capacity and toughness, ideal for medium to heavy-duty structural components that require superior strength and stability. Both grades have uniform internal microstructures, free from porosity and inclusions, ensuring consistent batch-to-batch performance and long-term structural integrity.

2. ASTM A36 Carbon Steel Angles

ASTM A36 is a globally recognized mild carbon structural steel grade complying with ASTM International standards, widely adopted in international construction and manufacturing markets. It offers a minimum yield strength of 250 MPa and a tensile strength range of 400-550 MPa, balancing exceptional ductility, toughness, and processability. ASTM A36 angle steel is highly compatible with all standard welding, cutting, and bending processes, requiring no complex heat treatment under normal application conditions, making it suitable for versatile structural uses, from general supports to main framework components, and fully compliant with international quality and safety standards.

Fixed Specification: 75mm×75mm×6mm Equal Angle Steel

A key highlight of this product line is the fixed standard specification of 75mm×75mm×6mm-an equal leg design where both legs measure 75mm in length, with a uniform thickness of 6mm. This specification is carefully engineered to strike an optimal balance between structural strength and material efficiency, widely used in scenarios requiring stable load-bearing and reliable support. The 90-degree right-angle precision is strictly controlled during production, ensuring symmetrical stress distribution, which effectively prevents stress concentration and enhances overall structural stability. The standardized 75×75×6mm size is compatible with bulk production, storage, and transportation, suitable for large-scale procurement and projects with uniform structural design requirements, eliminating the need for custom size adjustments in most cases.

Production Process & Product Features

All our equal angle steel products are manufactured via advanced hot-rolling (HR) technology, using high-purity continuous-cast steel billets that undergo strict raw material inspection to ensure material purity and quality. The multi-pass hot-rolling process shapes the billets into the precise 90-degree L-shaped cross-section, followed by controlled cooling and high-precision straightening to maintain perfect flatness, verticality, and dimensional consistency. The finished product features a smooth, clean surface with minimal oxide scale, no visible cracks, scratches, or mechanical damages, and a uniform cross-section throughout the entire length, complying with strict tolerance standards for structural steel angles.

As mild steel (MS) angle iron, this product exhibits excellent processability, supporting conventional processing methods such as arc welding, gas cutting, cold bending, and drilling, which greatly simplifies on-site fabrication and installation. The hot-rolled manufacturing process enhances the material's toughness and ductility, ensuring it can withstand bending and shear forces without deformation or fracture, making it a reliable choice for structural applications.

Key Product Advantages

Multi-Grade Adaptability: Q235, Q345, and ASTM A36 grades cover light, medium, and heavy-duty load requirements, compatible with global standards and diverse application scenarios, providing flexible material choices for different projects.

Standardized Specification: 75×75×6mm fixed size ensures uniform performance and easy compatibility, suitable for bulk procurement and projects with standardized structural designs, reducing procurement complexity.

Precise 90-Degree Design: Strict right-angle precision guarantees symmetrical stress distribution, enhancing structural stability and load-bearing efficiency, ideal for framework and support applications.

Superior Processability: Excellent weldability, cuttability, and bendability support efficient on-site processing and installation, reducing construction and fabrication time and labor costs.

High-Quality Hot-Rolled Construction: Advanced hot-rolling technology ensures dense internal structure, stable mechanical properties, and long-term durability, meeting the rigorous requirements of structural engineering.

Cost-Effective Performance: Mild carbon steel material offers optimal cost-performance ratio, with competitive pricing for bulk orders, making it suitable for large-scale projects and long-term procurement.

Main Application Scenarios

This hot-rolled equal angle steel (75×75×6mm, Q235-Q345, ASTM A36) is extensively applied in industrial and construction fields, including steel structure fabrication, building frameworks, industrial workshops, warehouse constructions, bridge auxiliary facilities, pipeline and cable supports, mechanical equipment bases, transmission tower components, and general hardware manufacturing. The 75×75×6mm specification is particularly suitable for medium-duty support structures, roof trusses, wall brackets, and load-bearing frameworks, while the multi-grade options allow for flexible adaptation to different project requirements-Q235 for cost-sensitive light-duty applications, Q345 for heavy-duty load-bearing components, and ASTM A36 for international standard projects. With its reliable quality, standardized specification, and versatile performance, this metal angle steel serves as an indispensable structural material for global engineering and manufacturing projects.