A1085 Structural Steel Pipe
For projects requiring higher structural performance than conventional carbon steel pipe, ASTM A1085 Structural Steel Pipe is designed to provide greater strength, tighter manufacturing tolerances, and improved consistency. As an experienced China A1085 Structural Steel Pipe supplier, Jiangsu CunRui Metal Products Co., LTD supplies ASTM A1085 HSS products for steel construction, infrastructure, industrial buildings, and heavy fabrication projects.
Product Specifications
| Item | Details |
| Standard | ASTM A1085 |
| Product Type | Structural Steel Pipe / HSS |
| Shapes | Round, Square, Rectangular |
| Outside Diameter (Round) | 48.3 mm – 813 mm |
| Square Size | 50 × 50 mm – 500 × 500 mm |
| Rectangular Size | 100 × 50 mm – 600 × 400 mm |
| Wall Thickness |
|
| Length | 6 m, 9 m, 12 m or customized |
| Surface | Black, Painted, Hot-dip Galvanized |
| Processing | Cutting, Beveling, Drilling, Welding, CNC Machining |
| Element | Content(%) |
| Carbon (C) | 0.23 |
| Manganese (Mn) | 1.35 |
| Phosphorus (P) | 0.035 |
| Sulfur (S) | 0.015 |
| Copper (Cu) | 0.40 |
| Property | Requirement |
| Yield Strength (Min) | 345 MPa (50 ksi) |
| Tensile Strength (Min) | 450 MPa (65 ksi) |
| Elongation | Meets ASTM A1085 requirements |
What Makes ASTM A1085 Different?
- Higher Structural Strength
With a minimum yield strength of 345 MPa (50 ksi), ASTM A1085 provides approximately 44% higher yield strength than ASTM A53 Grade B (240 MPa). This allows designers to reduce section weight while maintaining structural capacity.
- Tighter Dimensional Tolerances
ASTM A1085 controls wall thickness and dimensional variation more strictly, improving fit-up accuracy during fabrication and reducing on-site adjustment work.
- Better Weld Performance
Lower phosphorus and sulfur limits help improve weld quality and reduce the risk of welding defects, making the material suitable for large welded steel structures.
- Designed for High-Performance HSS Structures
ASTM A1085 is widely specified for buildings, stadiums, bridges, transportation hubs, and industrial facilities where higher structural reliability is required.
Typical Applications
- Structural columns and beams
- High-rise steel buildings
- Bridge construction
- Industrial plants
- Power generation facilities
- Transportation terminals
- Heavy equipment support structures
- Public infrastructure projects
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