STKR400 Galvanized Square Rectangular Steel Pipe | JIS G3466 Hollow Section

STKR400 Galvanized Square Rectangular Steel Pipe | JIS G3466 Hollow Section

  1. Manufactured in accordance with JIS G3466 standard, fully certified for Japanese construction market
  2. Hot-dip galvanized coating delivers stable anti-corrosion performance for outdoor usage
  3. Good weldability and formability, easy cutting, bending and on-site fabrication
  4. Stable mechanical property, ideal for general structural frames and support works
  5. Strict dimensional tolerance, consistent quality to meet Japanese engineering requirements
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Product Overview

Our STKR400 galvanized square and rectangular steel pipe is hot-dip galvanized structural hollow section produced complying with JIS G3466 standard. The base material is STKR400 carbon steel grade, welded and then processed with hot-dip galvanization to form a dense zinc protective layer on the steel surface.

STKR400 is the widely used grade under JIS G3466 for Japanese general structures. This galvanized hollow section is extensively applied in general building frames, greenhouse structures, solar brackets, fences, decorative structures and civil engineering projects. Uniform zinc coating provides reliable corrosion resistance in humid and open-air environments. Custom cutting service is supported to satisfy different length requirements of Japanese projects.

Galvanized Square/Rectangular Steel Pipe

Chemical & Mechanical Property Snapshot

Property Item STKR400
Standard JIS G3466
Yield Strength Min (MPa) 235
Tensile Strength Min (MPa) ≥400
C ≤ (%) ≤0.25
Mn ≤ (%) ≤1.40
P ≤ (%) ≤0.040
S ≤ (%) ≤0.040
Elongation A (%) ≥20

Detailed Technical Specifications

Specification Item Details
Product Name Galvanized Square / Rectangular Steel Pipe
Steel Grade STKR400
Execution Standard JIS G3466
Production Process Welded tube + Hot Dipped Galvanized
Zinc Coating Weight 60-275 g/m²
Wall Thickness 1.2mm – 16mm
Outer Dimension (Square) 10×10mm ~ 400×400mm
Outer Dimension (Rectangular) 20×10mm ~ 500×300mm
Length 5.8m / 6m / 11.8m or custom cut length
Surface Hot-dip galvanized, silver bright surface
MOQ 5 Tons
Lead Time 7–15 working days after deposit
Payment Terms T/T, L/C at sight
Package Bundled with steel strips, export standard packing

Dimension Section

Type Cross Section Size (mm) Available Wall Thickness (mm) Standard Length Custom Cut Length
SHS Square Hollow Section 10×10 0.8, 1.2, 1.5, 2.0, 2.5, 3.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 15×15 0.8, 1.2, 1.5, 2.0, 2.5, 3.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 20×20 0.8, 1.2, 1.5, 2.0, 2.5, 3.0, 4.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 25×25 0.8, 1.2, 1.5, 2.0, 2.5, 3.0, 4.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 30×30 0.8, 1.2, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 40×40 1.2, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 50×50 1.2, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 60×60 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 80×80 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 100×100 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 120×120 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 150×150 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 200×200 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 250×250 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 300×300 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 400×400 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
SHS Square Hollow Section 500×500 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 20×10 0.8, 1.2, 1.5, 2.0, 2.5, 3.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 30×20 0.8, 1.2, 1.5, 2.0, 2.5, 3.0, 4.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 40×20 1.2, 1.5, 2.0, 2.5, 3.0, 4.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 40×30 1.2, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 50×25 1.2, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 50×30 1.2, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 60×40 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 80×40 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 80×60 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 100×50 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 100×80 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 120×60 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 150×100 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 200×100 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 250×150 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 300×200 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 400×200 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 500×300 5.0, 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m
RHS Rectangular Hollow Section 600×400 6.0, 8.0, 10.0, 12.0, 16.0 6 m / 12 m 1–12 m

Product Comparison Table

Comparison Item STKR400
Equivalent Standard JIS G3466
Yield Strength Min (MPa) 235
Tensile Strength (MPa) ≥400
Typical Application Japanese-standard general structures, light & medium load frames
Corrosion Resistance After Galvanizing Good
Main Advantage JIS certification for the Japanese market, balanced strength and excellent weldability

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FAQs

Our STKR400 galvanized hollow sections follow JIS G3466 standard, suitable for Japanese construction and civil engineering projects.

STKR400 grade is commonly used for general building frames, solar brackets, greenhouses, fences and decorative structures in Japanese projects.

Yes, custom cutting service is available, subject to MOQ 5 tons.

Zinc coating weight ranges from 60g/m² to 275g/m², we can adjust zinc thickness as per customer anti-corrosion demand.

MOQ is 5 tons. Lead time is 7–15 working days after deposit received. Payment methods include T/T and L/C at sight.

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