ALLLAND Steel Pipe Supply
Welcome to ALLLAND Steel Pipe Manufacturing.At ALLLAND Steel Pipe, we supply high-quality ASTM A500 Grade D steel pipes, manufactured in accordance with the ASTM A500 standard, offering impressive strength and excellent weldability. This product is typically produced as square, rectangular, and round hollow structural sections (HSS) and is widely used in construction, bridges, industrial equipment, towers, and heavy-duty engineering projects. We operate state-of-the-art production lines that ensure precise dimensional control and consistent mechanical properties, and we also offer custom sizing and surface treatment services.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience.
The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines.
With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
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ASTM A500 Grade D is one of the higher-strength grades specified in the ASTM A500 standard for cold-formed welded and seamless structural steel tubes. It is primarily used in building structures, steel construction projects, bridges, and mechanical manufacturing.
O.D.:
Circular Hollow Section/ Round Structural Tubing
21.3 mm – 660 mm
Square Hollow Section
Width × Width：20×20 mm – 500×500 mm
Rectangular Hollow Section
Width × Height：20×30 mm – 600×400 mm
W.T.:
Round Structural Tubing
1.8 mm – 25 mm
Square Hollow Section
1.6 mm – 25 mm
Rectangular Hollow Section
1.6 mm – 25 mm
Length:
3 m – 18 m, available in fixed or multiple lengths; custom lengths per project requirements.
Manufacturing Process:
Cold Forming
ERW Welding
Standard:
ASTM A500
Tube Ends:
Plain End/ Beveled End/ Threaded End
Product Types:
Surface Treatment:
A500 Grade D Tubing Manufactured by ALLLAND:
Please contact us for more information. We welcome your inquiries at any time.
| Round Structural Tube | |
| Item | Range |
| Outside Diameter | 21.3 mm – 660 mm |
| Wall Thickness | 1.8 mm – 25 mm |
| Length | 3 m – 18 m |
| SHS / RHS | |
| Item | Range |
| Width | 20 × 20 mm – 500 × 500 mm |
| Wall Thickness | 1.6 mm – 25 mm |
| Length | 3 m – 18 m |
Circular Hollow Section/ Round Structural Tubing
| Outside Diameter (OD) | Wall Thickness (WT) | Length |
| 21.3 mm | 1.8 – 3.0 mm | 3 – 12 m |
| 26.9 mm | 1.8 – 4.0 mm | 3 – 12 m |
| 33.4 mm | 2.0 – 5.0 mm | 3 – 12 m |
| 42.2 mm | 2.0 – 6.0 mm | 3 – 12 m |
| 48.3 mm | 2.0 – 8.0 mm | 3 – 12 m |
| 60.3 mm | 2.0 – 10 mm | 3 – 12 m |
| 76.1 mm | 2.5 – 12 mm | 3 – 12 m |
| 88.9 mm | 2.5 – 12 mm | 3 – 12 m |
| 114.3 mm | 3.0 – 16 mm | 3 – 12 m |
| 168.3 mm | 4.0 – 20 mm | 3 – 18 m |
| 219.1 mm | 4.0 – 25 mm | 3 – 18 m |
| 273 mm | 5.0 – 25 mm | 3 – 18 m |
| 323.9 mm | 6.0 – 25 mm | 3 – 18 m |
| 406.4 mm | 6.0 – 25 mm | 6 – 18 m |
| 508 mm | 8.0 – 25 mm | 6 – 18 m |
| 660 mm | 8.0 – 25 mm | 6 – 18 m |
| Size (W×W) | Wall Thickness | Length |
| 20×20 mm | 1.6 – 3.0 mm | 3 – 12 m |
| 25×25 mm | 1.6 – 4.0 mm | 3 – 12 m |
| 40×40 mm | 1.8 – 5.0 mm | 3 – 12 m |
| 50×50 mm | 2.0 – 6.0 mm | 3 – 12 m |
| 75×75 mm | 2.0 – 8.0 mm | 3 – 12 m |
| 100×100 mm | 3.0 – 12 mm | 3 – 12 m |
| 150×150 mm | 4.0 – 16 mm | 3 – 18 m |
| 200×200 mm | 5.0 – 20 mm | 3 – 18 m |
| 250×250 mm | 5.0 – 25 mm | 6 – 18 m |
| 300×300 mm | 6.0 – 25 mm | 6 – 18 m |
| 400×400 mm | 6.0 – 25 mm | 6 – 18 m |
| 500×500 mm | 8.0 – 25 mm | 6 – 18 m |
Rectangular Hollow Section
| Size (W×H) | Wall Thickness | Length |
| 40×20 mm | 1.6 – 4.0 mm | 3 – 12 m |
| 50×30 mm | 1.8 – 5.0 mm | 3 – 12 m |
| 60×40 mm | 2.0 – 6.0 mm | 3 – 12 m |
| 80×40 mm | 2.0 – 8.0 mm | 3 – 12 m |
| 100×50 mm | 2.5 – 10 mm | 3 – 12 m |
| 120×60 mm | 3.0 – 12 mm | 3 – 12 m |
| 150×100 mm | 4.0 – 16 mm | 3 – 18 m |
| 200×100 mm | 5.0 – 20 mm | 3 – 18 m |
| 250×150 mm | 5.0 – 25 mm | 6 – 18 m |
| 300×200 mm | 6.0 – 25 mm | 6 – 18 m |
| 400×200 mm | 6.0 – 25 mm | 6 – 18 m |
| 600×400 mm | 8.0 – 25 mm | 6 – 18 m |
ASTM A500 is a manufacturing specification for cold-formed structural steel tubing, applicable to Round Hollow Sections (CHS), Square Hollow Sections (SHS), and Rectangular Hollow Sections (RHS).
Round Structural Tubing Outside Diameter Tolerance
OD ≤ 48.3 mm: ±0.5% × OD (minimum ±0.13 mm)
OD > 48.3 mm: ±0.75% × OD
Square and Rectangular Tubes Width & Height Tolerance
| Outside Flat Dimension | Tolerance |
| ≤65 mm | ±0.5 mm |
| 65–90 mm | ±0.6 mm |
| 90–140 mm | ±0.8 mm |
| ＞140 mm | ±1% |
Wall Thickness Tolerance: Minimum Wall Thickness Requirement
WTactual ≥ 0.90 × WTnominal (The actual wall thickness must not be less than 90% of the nominal thickness)
| Property | ASTM A500 Grade D |
| Tensile Strength | 400 MPa min（58 ksi） |
| Yield Strength | 250 MPa min（36 ksi） |
| Elongation | ≥ 23% |
| Grade | Yield Strength | Tensile Strength | Features |
| Grade A | 33 ksi | 45 ksi | Basic Structural Applications |
| Grade B | 46 ksi | 58 ksi | Most Commonly Used |
| Grade C | 50 ksi | 62 ksi | High Strength |
| Grade D | 36 ksi | 58 ksi | Better Toughness and Weldability |
Grade D is a medium-to-high-strength structural steel grade. Although its yield strength is lower than that of Grades B and C, Grade D emphasizes overall performance, including toughness, weldability, cold formability, and crack resistance.
ASTM A500 Grade D is suitable for high-load structures, long-span projects, and heavy-duty steel structures.
ASTM A500 Grade D has a moderate carbon content (C ≤ 0.26%). Rather than aiming for extreme high strength, it prioritizes a balance of various properties.
A500 Gr D is suitable for MIG welding, TIG welding, and arc welding, and is widely used in steel structure assembly and on-site welding work.
| Element | Typical Content |
| Carbon (C) | ≤ 0.26% |
| Manganese (Mn) | ≤ 1.35% |
| Phosphorus (P) | ≤ 0.035% |
| Sulfur (S) | ≤ 0.035% |
| Copper (Cu) | ≥ 0.20% (If corrosion resistance is required) |
ASTM A500 Grade D offers good structural strength without compromising weldability and toughness, and is widely used in various industrial sectors.
Structural Construction: The core application areas for A500 Grade D.
· Steel Buildings
· Warehouses
· Workshops
Bridge Engineering: Bridge Frames, Bridge Supports
Industrial Plants: Factory Buildings, Equipment Platforms
Machinery Manufacturing: Structural Fabrication, Mechanical Supports
Large Span Structures: Stadium Roofs, Space Frames
Solar & Renewable Energy: Applications in this sector have been increasing in recent years.
· Solar Mounting Structures
· Wind Power Auxiliary Frames
· Energy Equipment Supports
Options include:Welded、Seamless
Most of the products on the market are ERW welded structural tubing.
ASTM A500 is primarily used in structural applications, while ASTM A53 is used in fluid conveyance applications.
| Grade | Yield Strength | Tensile Strength |
| Grade B | 46 ksi (317 MPa) | 58 ksi (400 MPa) |
| Grade D | 36 ksi (250 MPa) | 58 ksi (400 MPa) |
Grade B has a higher yield strength, is the most common on the market, and is suitable for general steel structure projects;
Grade D has better ductility and superior cold-forming properties, making it suitable for structures subjected to dynamic loads or complex welded structures.
