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ASTM A500 Grade B Steel Pipe | Round Structural Steel Pipe in 2-1/2″–5″ Sizes
Royal Steel Group supplies ASTM A500 Grade B Steel Pipe for structural, construction, fabrication, and industrial applications. Manufactured to meet ASTM A500 requirements, these round structural steel pipes offer a practical combination of strength, dimensional consistency, weldability, and cost efficiency for large-volume projects.
Our recent supply program includes approximately 400 MT of ASTM A500 Grade B steel pipe, with commonly requested sizes from 2-1/2″ to 5″ and customized wall thicknesses to meet different structural and fabrication requirements.
Technical Data
ASTM A500 Grade B Steel Pipe Chemical Composition
| Element | Grade A (%) | Grade B (%) | Grade C (%) |
| Carbon (C), max | 0.26 | 0.26 | 0.23 |
| Manganese (Mn), max | 1.35 | 1.35 | 1.35 |
| Phosphorus (P), max | 0.035 | 0.035 | 0.035 |
| Sulfur (S), max | 0.035 | 0.035 | 0.035 |
| Copper (Cu), min ① | 0.2 | 0.2 | 0.2 |
ASTM A500 Structural Pipe Mechanical Property
| Grade | Tensile Strength (min) | Yield Strength (min) | Elongation in 2" (50mm), min |
| A | 45,000 psi (310 MPa) | 39,000 psi (269 MPa) | 25% |
| B | 58,000 psi (400 MPa) | 46,000 psi (315 MPa) | 23% |
| C | 62,000 psi (425 MPa) | 50,000 psi (345 MPa) | 21% |
| Nominal Diameter | Outside Diameter | Wall Thickness |
| 5″ | 139.7 mm | 4.0 mm |
| 4″ | 114.3 mm | 3.0 mm |
| 3″ | 88.9 mm | 2.5 mm |
| 2-1/2″ | Approx. 73.0 mm | 2.0 mm |
Other diameters, wall thicknesses, and lengths can be supplied according to project requirements.
| Manufacturing Process vs. Size Capabilities | |||||
| Process | Max OD (mm) | Max WT (mm) | Length Range (m) | Cost Efficiency | Best For |
| SSAW (Spiral) | 3200 | 30 | 6-18 | Highest | Large diameter, medium wall thickness (16"-48") |
| LSAW (JCOE) | 1422 | 50 | 6-15 | High | Ultra-thick wall (≥1.0"), high strength requirements |
| ERW | 660 | 25 | 6-12 | Medium | Small to medium diameter, standard wall thickness |
| Seamless | 1016 | 100 | 6-12 | Lowest | Critical applications, corrosive environments |
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| Item | Details |
| Standard | ASTM A500 |
| Material Grade | Grade B |
| Product Category | Round Carbon Steel Structural Pipe |
| Shape | Circular / Round |
| Outer Diameter | 2-1/2″ – 5″ (custom sizes acceptable) |
| Wall Thickness | 2.0mm – 4.0mm for conventional sizes, customizable |
| Length | Standard length or custom tailored |
| Surface Treatment | Black finish, galvanized, painted, and other customized treatments |
| Quality Inspection | Mill Test Certificate (MTC) provided to guarantee quality |
| Supply Capacity | Available for large project bulk orders, supporting full container and vessel shipment |
High Structural Strength
Our ASTM A500 Grade B steel pipes are engineered specifically for structural projects. They deliver stable mechanical properties and precise dimensional accuracy, perfectly meeting the rigorous performance requirements of building and industrial structural applications.
Excellent Weldability & Processability
This steel pipe grade features superior process performance. It can be freely cut, welded, fabricated and assembled on-site, offering great flexibility to adapt to diverse structural design and engineering construction needs.
Diversified Size & Custom Options
We have a full range of mainstream sizes in stock, covering common specifications of 2-1/2″, 3″, 4″ and 5″. Custom outer diameters and wall thicknesses are also available to match your personalized project requirements.
Reliable Bulk Supply Capacity
Backed by mature production systems and professional export logistics, we are fully capable of supporting large-scale procurement. Whether conventional orders or hundred-ton-level engineering bulk projects, we can guarantee stable supply and timely delivery.
Structural steel frame assemblies
Commercial and residential building construction
Warehouse & workshop steel building frameworks
Industrial fabrication and heavy‑duty equipment supports
Fencing systems, handrails and safety guardrails
Agricultural installations and greenhouse structural builds
Royal Steel Group puts strict quality checks in place across the full production and shipping cycle. Based on your project needs, we can offer the following inspection services:
Mill Test Certificate (MTC)
Dimensional verification
Chemical & mechanical property lab testing
Surface and visual quality checks
Third‑party inspection including SGS
Pre‑shipment inspection and quantity confirmation
Royal Steel Group provides ASTM A500 Grade B structural steel pipe for international construction and industrial projects, combining competitive sourcing, strict quality control, flexible specifications, and professional export services.
For large-volume requirements such as 400 MT steel pipe orders, we can coordinate production, inspection, packaging, shipping, and export documentation to provide a complete steel supply solution.
Contact Royal Steel Group for ASTM A500 Grade B Steel Pipe quotations, specifications, and project-based supply.
Steel pipes are securely bundled and protected for international transportation. Packaging and loading methods can be adjusted according to the pipe diameter, length, quantity, and destination.
Available shipping options include:
Container shipment
Bulk vessel shipment
Bundled steel pipe loading
Customized export packaging
1. Do your steel pipes fully comply with ASTM A500 Grade B standard?
Absolutely. All our round structural steel pipes are strictly manufactured in line with ASTM A500 Grade B specifications. Full material inspection is conducted during production, and official Mill Test Certificates (MTC) are provided to verify chemical composition, mechanical performance and accurate dimensional compliance.
2. What standard sizes do you offer, and is customization available?
We supply all mainstream industry sizes: 2-1/2″, 3″, 4″ and 5″, with matched industrial wall thicknesses. Besides standard specifications, we offer full customization on outer diameter, wall thickness and pipe length to fit custom project designs.
3. How do you guarantee dimensional accuracy and wall thickness stability?
We carry out strict dimensional checks throughout production and before shipment. Key indicators including wall thickness, outer diameter, straightness and surface condition are fully inspected with official records. We strictly follow standard tolerances to ensure consistent structural performance for bulk orders.
4. Are third-party inspections supported for bulk orders?
Yes. We fully support SGS and other independent third-party inspections as requested by buyers. Inspectors can verify product dimensions, surface quality, quantity, packaging and marking before loading, ensuring full transparency for international project orders.
5. Do you have large-volume supply capacity for engineering projects?
We are capable of stable bulk supply of 400MT and above for single orders. With mature production scheduling and professional export logistics, we support multi-size mixed batch orders, unified quality control and on-time shipment for large construction and industrial projects.
6. What surface finishes and application scenarios are available?
Our standard supply is black structural steel pipe. Galvanized, painted and other customized anti-corrosion treatments are optional. These A500 Grade B pipes are widely used for building structures, warehouse/workshop frameworks, equipment supports, safety railings and agricultural greenhouse structures.
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Kangsheng development industry zone,
Wuqing district, Tianjin city, China.
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