SHANGHAI RUICHAO INDUSTRIAL
SHANGHAI RUICHAO INDUSTRIAL
Structural steel is a high-strength, versatile building material engineered into standardized profiles—such as I-beams, channels, and angles—to meet strict mechanical and chemical specifications. Known for its exceptional strength-to-weight ratio, it enables the efficient construction of large, load-bearing structures without unnecessary mass. Additional advantages include consistent quality, ease of fabrication, and compatibility with on-site welding and bolting. It serves as the primary framework in skyscrapers, bridges, industrial buildings, and stadiums, providing the durable backbone of modern architectural and civil engineering projects.
Specification Parameters
| Parameters of Structural Steel | |||
| Parameter Category | Specific Parameter | Typical Values / Description | Governing Standard (Example) |
| Mechanical Properties | Minimum Yield Strength (Fy) | 250 MPa, 355 MPa, 450 MPa (e.g., S355 steel has a min. yield of 355 MPa) | ASTM A992, EN 10025 (S-series) |
| Minimum Tensile Strength (Fu) | 400 - 700 MPa (Must be significantly higher than yield strength) | ASTM A992, EN 10025 | |
| Elongation at Break | Typically > 20% (in 50mm or 2 inches) | Measured in a tensile test; indicates ductility. | |
| Charpy V-Notch Impact Toughness | 27 Joules @ -20°C or lower (Specified for fracture-critical applications) | ASTM A370 | |
| Chemical Composition | Carbon (C) | 0.10% - 0.25% (Generally kept low) | Controlled for weldability and toughness. |
| Manganese (Mn) | 0.50% - 1.50% | Increases strength and hardenability. | |
| Other Elements | Sulphur (S) & Phosphorus (P) kept very low (< 0.05%) | Impurities that reduce toughness and weldability. | |
| Alloying (HSLA) | May include small amounts of Niobium (Nb), Vanadium (V) | Used in higher-strength grades for grain refinement and precipitation hardening. | |
| Dimensional Tolerances | Cross-Sectional Dimensions | Governed by strict standards for depth, width, flange thickness, etc. | ASTM A6 / A6M |
| Straightness & Camber | Defined limits for deviation from straightness over length. | ASTM A6 / A6M | |
| Shape & Profile | Standard Shapes | Wide-Flange (W) beams, Channels (C), Angles (L), Tees (WT), H-Piles (HP) | Defined in ASTM A6 / A6M |
| Size Availability | Designated by nominal depth and weight (e.g., W12x50 is ~12" deep, 50 lb/ft) | Varies by manufacturer. | |
