40×40×3mm Hot Rolled Equal Angle Bar SS400 for Solar & Steel Structure
40×40×3mm Hot Rolled Equal Angle Bar SS400 for Solar & Steel Structure
40×40×3mm equal angle steel, commonly used for light structural framing, support brackets, and general steel fabrication. Available in various lengths and steel grades to suit different project requirements. We also offer drilling, processing, and welding services. Suitable for frame fabrication, support welding, and general steelwork. Contact us for available specifications, stock, and pricing.
- Mill Test Certificate Provided
- Strict Quality Inspection
- Custom Sizes Available
- On-Time Global Delivery
Sky Steel Group manufactures and exports prime-quality 40×40×3mm equal angle steel bars (mild steel angle iron / L-profile steel) in hot-rolled black finish and hot-dip galvanized (HDG) conditions. Produced to strict international structural standards (JIS G3101 SS400, ASTM A36, EN 10025 S275JR, GB/T 700 Q235B), this standard 40mm × 40mm section provides balanced structural strength, high ductility, excellent weldability, and easy cold fabrication for steel framing, industrial racking, cable trays, and agricultural machinery.
Symmetrical Structural Stability, High Formability & Corrosion Resistance
40×40×3mm equal angle steel (MS angle bar 40×3) is a versatile structural profile engineered with identical leg widths and uniform 3.0 mm wall thickness, delivering equal moments of inertia along both principal axes ($I_x = I_y$). The true 90-degree internal fillet angle ensures flush seating and reliable joint alignment during bolted connections, mechanical drilling, and automated welding operations.
To prevent atmospheric corrosion in high-humidity, coastal, and tropical industrial environments, our angle bars can be supplied batch hot-dip galvanized per ASTM A123 / ISO 1461 with zinc coating thickness ranging from 45 µm to 85 µm (320 – 610 g/m²). Processing capabilities include precision cold sawing (5.8m / 6.0m / 11.8m / 12.0m container lengths), CNC bolt-hole punching, slotted hole drilling, miter cutting, and custom bundling.
40×40×3mm Equal Angle Steel (Angle Bar) Specifications
| Item | Standard Parameter / Technical Specification |
|---|---|
| Product | Hot-Rolled Equal Angle Steel Bar / Mild Steel Angle Iron / L-Profile Section |
| Section Dimensions | 40 mm × 40 mm × 3.0 mm (Leg Width A: 40mm, Leg Width B: 40mm, Thickness t: 3.0mm) |
| Theoretical Weight | 1.852 kg/m (Nominal weight per meter: ~11.11 kg per 6.0m length / ~22.22 kg per 12.0m bar) |
| Dimensional Tolerance | Leg Width: ±0.8 mm / Thickness: ±0.3 mm / Angle Deviation: 90° ± 45′ / Straightness: ≤ 2.0 mm/m |
| Steel Grades | JIS G3101 SS400 / ASTM A36 / EN 10025 S275JR, S235JR / GB/T 700 Q235B / AS/NZS 3679.1 Gr.250 / MS 146 |
| Applicable Standards | JIS G3192, ASTM A36/A6M, EN 10056-1/2, GB/T 706, ISO 657-1 |
| Surface Treatment | Hot-Rolled Black (Mill Finish) / Batch Hot-Dip Galvanized (HDG) / Red Oxide Primer / Shot Blasting SA 2.5 |
| Galvanizing Standard | ASTM A123 / ISO 1461 / BS 729 / EN ISO 1461 (Zinc Mass: 45 µm – 85 µm / 320 – 610 g/m²) |
| Standard Lengths | 5.8m, 6.0m (for 20GP container) / 11.8m, 12.0m (for 40GP/40HQ container) / Custom Cut-to-Length |
| Fabrication Services | CNC Punching, Oval Slotting, Laser Cutting, 45° Miter Sawing, Welding, Hole Deburring, Hard Stamping |
| Application | Light Steel Structures / Industrial Racking & Shelving / Cable Tray Supports / Machinery Frames / Greenhouse Trusses |
| Bundle Weight | 1.0 – 2.5 Metric Tons per bundle (Tightly nested triangular/rectangular bundles with high-tensile steel strapping) |
| Inspection & Certificate | EN 10204 3.1 Mill Test Certificate (MTC) / Tensile, Yield, Bending Test Reports / SGS, BV, TUV Inspection Supported |
| Export Packaging | Seaworthy Export Bundles with Rust-Inhibitor Coating, Lifting Wire Slings, Moisture Barrier & Solid Timber Dunnage |
Need a Direct Mill Quote for 40×40×3mm Equal Angle Steel?
Send us your required steel grade (SS400/A36/Q235B), surface finish (Black/HDG), cut lengths (6m/12m), punching drawings, and volume for an instant FOB / CIF wholesale price.
Where Is 40×40×3mm Equal Angle Steel Used?
Combining lightweight cross-section efficiency with symmetrical bending resistance, 40×40×3mm equal angle steel bars are widely utilized in industrial building construction, modular framing systems, warehouse racking, secondary bracing, and global containerized engineering projects.
Industrial Steel Building Framing & Structural Sub-Assemblies
40×40×3mm angle bars are extensively fabricated into roof truss web members, purlin sag rods, equipment sub-frames, and wall cladding supports in pre-engineered steel buildings. The consistent 3.0 mm wall thickness offers easy drillability and clean welding, providing stable load distribution across secondary steel framing networks.
Precision Container Stuffing & Maritime Export Logistics
To optimize shipping payload and freight costs, angle bars are cold-saw cut to exact 5.8m (for 20GP) or 11.8m (for 40GP/40HQ) lengths, achieving container loads of 25–27 Metric Tons. Bundles are crane-loaded with protective hoisting straps, secured with floor timber dunnage, and firmly cross-lashed to prevent transit shifting, bending deformation, or container lining abrasion.
Mill Inventory Stock & Standardized Nested Bundling
Produced on high-speed continuous rolling mills to ensure exact 90° leg angles, smooth surface finish, and minimal dimensional variance (±0.8mm). Angle bars are nested in compact, interlocked bundles strapped with high-tensile steel bands and tagged with heat numbers and piece counts for rapid stockyard handling and site erection.
40×40×3mm Equal Angle Steel FAQ
Answers to technical questions regarding theoretical weight calculations, dimensional tolerances, international steel grades, hot-dip galvanizing, CNC hole punching, and container logistics.
