Square Stainless Steel Box Tubing (ASTM A554)

Application Compatibility: Optimized for 90° mitered frame welding, square post base plate integration, and CNC tube laser slotting.

Key Engineering & Tolerance Highlights:

• Corner perpendicularity: 90° ± 0.5° for gapless joint alignment.
• Tight corner radius: R ≤ 1.5t for crisp architectural edges.
• Side concavity/convexity: Max deviation < 0.15mm across flat surfaces.
• Twist angle: < 1.5mm per 1000mm length.

Dimensions / Scope:
10 × 10 mm – 150 × 150 mm (0.4" × 0.4" – 6.0" × 6.0")

Wall / Gauge:
0.6 mm – 5.0 mm (±0.05 mm precision control)

Lead Time & MOQ:
15 - 20 Days | MOQ: 1 Metric Ton per Size

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Technical Specifications & Direct Mill Services

Technical Parameter	Factory Specification Data
Material / SKU	ST-A554-SQ-SERIES
Manufacturing Standard	ASTM A554
Available Grades	316L, 304, 304L, 201
Profile Form	square
Dimensional Scope	10 × 10 mm – 150 × 150 mm (0.4″ × 0.4″ – 6.0″ × 6.0″)
Wall & Tolerance	0.6 mm – 5.0 mm (±0.05 mm precision control)
Surface Finishes	180 Satin, 320 Brushed, 600 Mirror, 8K Mirror
Export Length	5800 mm / 6000 mm / Custom Cut-to-Length
HS Tariff Code	7306.61.00
Export Packaging	Individual PE Sleeves + Square Steel-Banded Bundles + Moisture Barrier Outer Wrap

🏭 SANON Mill Direct Capabilities

Direct manufacturer pricing with full OEM customization and quality assurance for commercial projects:

✂️ Custom Cut-to-Length: Precision factory sawing to job-site dimensions (-0 / +2mm).
📜 Full Traceability: Heat number matched with official EN 10204 3.1 MTR certificates.
🎨 Custom Finishes: 180# Satin, 8K Mirror, and PVD Matte Black / Gold titanium coating.
📦 Seaworthy Packing: Individual plastic sleeve + steel-framed wooden crates for transit.

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⚙️ Shape-Specific Manufacturing Process

Direct roll-forming and corner profiling from slit strip coils. Calibrated tooling dies ensure accurate 90° corner perpendicularity.

🔍 Quality Assurance & Flaw Detection

Perpendicularity audits using digital coordinate gauges, side parallelism checks, and internal weld reinforcement verification.

Technical Compliance & Documentation Hub

📄 Technical Datasheet (PDF)

Detailed dimensional tolerances, mechanical properties, and cut-length specs.

Download Datasheet (PDF)

📜 EN 10204 3.1 MTR Sample

Official Mill Test Report verifying chemical composition and tensile strength.

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📦 Export Packaging Spec

Anti-scratch individual sleeves and heavy-duty steel frame crate packing overview.

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Compatible Hardware & Architectural Systems

SANON stainless steel materials and tubing are dimensionally calibrated to integrate with our modular components and pre-engineered balustrade systems.

🔩 Matching Hardware & Connectors

Explore precision-cast handrail brackets, flush elbows, tube joiners, and post bases dimensionally calibrated for this profile.

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🏗️ Full Architectural Railing Systems

Discover pre-engineered glass, cable, and post balustrade solutions that utilize SANON heavy-wall stainless steel tubing.

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