Introduction
Hexagonal steel bars are manufactured through hot-rolling or cold-drawing processes, featuring uniform six-sided geometric cross-sections. These metal components find extensive applications in building projects, equipment fabrication, vehicle production systems, and various industrial sectors. Product specifications are determined by the diagonal measurement across parallel faces (denoted as S), with available sizes spanning from 8 millimeters to 70 millimeters. Compliance with international manufacturing standards is maintained through adherence to Chinese National Standard GB/T 702-2017, American Society for Testing Materials specification ASTM A36, and European Norm EN 10025 protocols, guaranteeing dimensional consistency and reliable material performance characteristics.
product highlights
1. Excellent mechanical characteristics: Crafted from top-notch carbon steels (Q235B, Q345) and alloy steels (40Cr, 45#), displaying tensile strengths between 370-660MPa and yielding a minimum strength of 235MPa, suited for heavy structural uses.
2. High-level manufacturing precision: Employing cold-drawn shaping methods to guarantee dimensional precision of ±0.25mm and attain surface roughness of less than 3.2μm Ra, meeting rigorous standards for high-precision mechanical components.
3. Diverse surface treatments: Available in black oxide, pickling, galvanizing (thickness ≥85μm), phosphating, etc., enhancing corrosion and wear resistance.
Application Scenarios
manufacturing technique
Hot-Rolling Process
Billets are heated to 1100–1200℃ and formed by rolling mills, suitable for large-size products.
Cold-Drawing Process
After hot rolling, cold drawing is applied to achieve high dimensional precision and smooth surface, suitable for precision parts.
Surface Treatments
Pickling: Removes oxide scale to improve weldability; Galvanizing: Zinc layer thickness ≥85μm for excellent corrosion resistance.
Packaging and Transportation
1. Packaging：Bundled with steel straps, each bundle ≤3 tons, covered with waterproof plastic film.
2. Transportation：Supports road, rail, and sea shipping, with customized logistics solutions available.
FAQ
Q: What determines the nominal dimensions of a hexagonal steel bar?
A: The nominal dimensions are determined by the spacing between facing sides (S), specifically the distance separating two opposite parallel faces of the regular hexagon. For instance, S=20mm signifies that the spacing between facing sides measures 20mm.
Q: What common materials are available, and what are their application scenarios?
A: Available materials include:
Carbon steel (Q235B, Q345): Stable comprehensive performance, suitable for construction structures and general mechanical parts.
High-quality carbon steel (45#): Good strength and wear resistance, used for precision components like shafts and gears.
Alloy steel (40Cr, 35CrMo): Resistant to high temperature and pressure, suitable for high-strength mechanical parts (e.g., automotive drive shafts, heavy equipment accessories).
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