ALLLAND Boiler Steel Pipe Supply
ASTM A500 Grade A
Welcome to ALLLAND. Our ASTM A500 Grade A structural steel tubes are manufactured in strict accordance with ASTM International standards using advanced cold-formed welding processes. Our product range includes square tubes (SHS), rectangular tubes (RHS), and round tubes (Round HSS), among other types. This material is a low-carbon structural steel that offers excellent weldability, formability, and consistent mechanical properties. It is suitable for light-duty structures, building frames, support members, and general engineering applications.
- O.D. 21.3-660mm
- W.T. 1.5 mm ～ 25 mm
- Length 6-12m
- Yield strength: ≥ 230 MPa; Tensile strength: ≥ 310 MPa
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 is a standard specification established by the American Society for Testing and Materials (ASTM) that defines the technical requirements for cold-formed, hot-formed, welded, or seamless structural steel tubes, including circular, square, and rectangular shapes.
ASTM A500/A500M is the most commonly used specification for hollow structural sections (HSS) in North America. The ASTM A500 standard comprises four grades: Grade A, Grade B, Grade C, and Grade D. Grade A is a steel grade within ASTM A500, primarily intended for general structural applications. It specifies the minimum yield strength, tensile strength, and ductility requirements for steel tubes of this grade.
ASTM A500 Grade A Specifications
O.D.:
CHS: 21.3 mm – 660 mm;SHS: 20 × 20 mm – 500 × 500 mm, RHSs: 40 × 20 mm – 500 × 300 mm
W.T.:
1.5 mm – 25 mm; Common market thicknesses: 2.0 – 6.0 mm
Length:
6/12 m; Available in custom lengths or random lengths
Performance:
Yield Strength: ≥ 230 MPa; Tensile Strength: ≥ 310 MPa
Tube Ends& Surface Treatment:
Square, Chamfered; Black Skin, Pickled, Painted/Oiled for Rust Prevention
Delivery Conditions:
Grade, Specification, Furnace Number, Standard
Note
Mechanical Properties for ASTM A500 Gr.A
Mechanical properties refer to how a material behaves under different external forces, including yield strength, tensile strength, elongation (ductility), and hardness.
| Round Structural Tube | Shaped Structural Tube | |
| Tensile strength, mn, ps (MPa) | 45 000 (310) | 45 000 (310) |
| Yield strength, mn, psi (MPa) | 33 000 (228) | 39000 (269) |
| Elongation in 2 in. (50.8 mm), min, %A | 25B | 25B |
Compared to other grades in the ASTM A500, Grade A exhibits the highest tensile elongation(25%), followed by Grade B (23%) and Grade C (21%).
In other words, Grade A material is relatively “softer” and easier to process. If your project involves cold bending, flanging, or flaring, you may want to consider Grade A.
Chemical Requirements for ASTM A500 Gr.A
| Elements | Chemical Composition Range |
| Carbon (C),max | 0.26 |
| Manganese (Mn),max | 1.35 |
| Phosphorus (P),max | 0.035% |
| Sulfur (S),max | 0.035 |
| Copper(Cu), when copper steel is specified, min | 0.02 |
Grade A has the lowest tensile strength and yield strength among ASTM A500 grades. It is suitable for projects with low strength requirements or for non-load-bearing structural components.
ASTM A500 Grade A Dimensional Tolerances
| Type | Feature | Range | Tolerance |
| Round tube | OD≤ 48.3 mm | ±0.5% | |
| OD≥ 50.8 mm | ±0.75% | ||
| WT | >90% | ||
| Square and Rectangular Tube | H ≤Hmm | ±0.5 mm | |
| 63.5 mm <H≤ 88.9 mm | ±0.6 mm | ||
| 88.9 mm <H≤ 139.7 mm | ±0.8 mm | ||
| H> 139.7 mm | ±1% | ||
| WT | >90% |
ASTM A500 Grade A Advantages and Applications
A500 Grade A Advantages
Excellent Formability
With higher elongation, Grade A easily handles cold forming, cutting, drilling, and welding.
Reliable Weldability
All ASTM A500 grades (A, B, C, D) weld well, but Grade A has lower carbon content and strength, making it softer.
Cost Efficiency
Lower alloy content reduces production costs.
A500 Grade A Advantages
General Structures and Light Supports
Non-load-bearing interior walls, support frames, roof trusses, etc.
Base frames and guardrails for machinery and equipment.
Architectural and Decorative Uses
Stair railings, balcony railings, garden fences, etc.
Industrial-style furniture.
Municipal and Transportation Infrastructure
Signposts, traffic signal poles, and streetlight poles on highways,etc.
Scaffolding and Temporary Structures
Scaffolding.
Temporary support frame.
Why Choose ALLLAND
We operate our own manufacturing facilities and have 25 years of experience in steel pipe manufacturing, ensuring that our products comply with major global standards.Such as API, ASTM, EN, JIS, and DIN.
Our extensive international project and export experience,having collaborated with Fortune 500 clients like , PetroChina(CNPC), ADNOC, and Petrobras.
While ensuring product quality, we achieve an on-time delivery rate of 99.3%.
