Product Name
Small-Section Steel (Light Structural & Precision Sections)
Introduction
Small-Section Steel covers a family of light structural and precision profiles - thin-walled hollow sections, small I/HE sections, light channels, angles, flats, small square/rectangular tubes and precision cold-drawn bars. These sections are optimized for low-weight frameworks, furniture, light machinery, architectural trims and general fabrication where tight tolerances, good finish and easy fabrication are important.
Typical Materials & Manufacture
Materials: Cold-rolled / hot-rolled mild carbon steels (e.g., S235/A36), low-alloy steels (S355/A572), 304/316 stainless, and sometimes aluminum alloys for lightweight needs.
Manufacture: Cold roll forming, ERW/SSAW welded tube, seamless cold-drawn tube, hot-rolled small profiles, and precision grinding for bars.
Common Forms: Small square/rectangular tube, Ø15–Ø100 mm round tube, small I/C sections, light channels, equal/unequal angles, flat bars and precision round/square bars.
Typical Dimensions & Tolerances
Outside dimensions (tube): 10 × 10 mm → 100 × 100 mm (square/rectangular); Ø8 → Ø100 mm (round).
Wall thickness: 0.6 → 6.0 mm (typical).
Flat bars / angles: widths 10 → 150 mm, thickness 1 → 10 mm.
Lengths: standard 3 m, 6 m, 12 m; cut-to-length available.
Tolerances: ±0.1–0.5 mm (cold-formed/precision); hot-rolled tolerances wider per standard.
Mechanical Properties (typical)
Yield strength: 235–355 MPa (grade dependent).
Tensile strength: 360–550 MPa.
Elongation: ≥ 10–25% (depends on grade and process).
Finish: mill, pickled & oiled, bright cold-drawn, galvanized, powder-coated or painted.
Features & Advantages
Precision Geometry: Tight dimensional control for slotting, assembly fit and automated welding.
Lightweight & Cost-Effective: Optimized for low mass while providing adequate stiffness for small structures.
Easy Fabrication: Good weldability, formability and machinability for shop or fieldwork.
Aesthetic Finishes Available: Prepainted, powder coat or polished stainless options for exposed architectural or furniture use.
Versatile Supply Forms: Stock lengths, coils (strips), or custom cut and pre-notched/punched kits.
Typical Applications
Furniture frames, shelving, signage and display stands.
Light structural framing, secondary supports and internal partitions.
HVAC supports, cable trays and equipment housings.
Automotive subcomponents, bicycle frames and light vehicle structures.
Handrails, balustrades and façade trim where slim profiles are required.
Instrumentation tubing and small-bore fluid lines (precision grades).
Quality Assurance & Testing
Documentation: Mill Test Certificates (MTC) available on request.
Dimensional Control: Laser or caliper checks for cross-section, wall thickness and straightness.
Mechanical Testing: Tensile and hardness tests on representative samples for critical orders.
Surface & Coating Tests: Coating thickness, adhesion and salt-spray available per spec.
NDT: Eddy-current or UT on thin-walled pressure/precision tubes if required.
Packaging & Delivery
Bundling: Strapped bundles with protective spacers; internal cores for long thin tubes to avoid collapse.
End Protection: Plastic caps or taped ends for small tubes and hollow sections.
Surface Protection: VCI paper or shrink film for prefinished surfaces.
Lead Time: Stock items typically 3–10 working days; custom sizes, finishes or precision ground bars 2–6 weeks.
How to Order / Technical Information Needed
Please provide: product form (tube/angle/flat/round bar), exact cross-section or drawing, material grade, wall thickness, length, surface finish, tolerance class and quantity. For load-bearing use, include loads, span and mounting details so we can advise on section selection and wall thickness.
If you want, I can produce a quick size-to-weight table, section properties (area, moment of inertia, mass/m), or a quote - send the dimensions and quantity and I'll prepare it.
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