ASTM A572 Grade 50 steel I-beams are high-strength, low-alloy structural beams offering excellent load-bearing capacity and weldability for buildings, bridges, and industrial structures.
High Strength Low Alloy ASTM A572 Grade 50 Steel I-Beams Custom Sizes Available Structural Steel I-Beam
| Property | Specification / Details |
|---|---|
| Material Standard | ASTM A572 Grade 50 (HSLA structural steel) |
| Mechanical Strength | Yield ≥345 MPa (50 ksi); Tensile 450–620 MPa |
| Section Sizes | W8×18 to W24×104 (imperial W-shapes) |
| Length Options | Standard 6 m & 12 m; project-based cutting available |
| Dimensional Control | Produced to ASTM A6 tolerances |
| Inspection & Certification | EN 10204 3.1; optional SGS / BV testing |
| Surface Condition | Black, painted, or hot-dip galvanized |
| Typical Uses | Buildings, bridges, heavy industry, transport & marine structures |
| Carbon Equivalent (Ceq) | ≤0.47%, suitable for structural welding (AWS D1.1) |
| Finish Quality | Smooth surface, free of defects; straightness ≤2 mm/m |
| Property | Specification | Description |
|---|---|---|
| Yield Strength | ≥345 MPa (50 ksi) | Load level where permanent deformation starts |
| Tensile Strength | 450–620 MPa (65–90 ksi) | Maximum tensile load before fracture |
| Elongation | ≥18% | Ductility measured over standard gauge length |
| Hardness (Brinell) | 135–180 HB | Indicative hardness range |
| Carbon (C) | ≤0.23% | Balanced for strength and weldability |
| Manganese (Mn) | 0.50–1.60% | Improves strength and low-temperature toughness |
| Sulfur (S) | ≤0.05% | Controlled to maintain ductility |
| Phosphorus (P) | ≤0.04% | Limited to enhance toughness and fatigue resistance |
| Silicon (Si) | ≤0.40% | Contributes to strength and deoxidation |
| Shape | Depth (in) | Flange Width (in) | Web Thickness (in) | Flange Thickness (in) | Weight (lb/ft) |
| W8×21（Sizes Available） | 8.06 | 8.03 | 0.23 | 0.36 | 21 |
| W8×24 | 8.06 | 8.03 | 0.26 | 0.44 | 24 |
| W10×26 | 10.02 | 6.75 | 0.23 | 0.38 | 26 |
| W10×30 | 10.05 | 6.75 | 0.28 | 0.44 | 30 |
| W12×35 | 12 | 8 | 0.26 | 0.44 | 35 |
| W12×40 | 12 | 8 | 0.3 | 0.5 | 40 |
| W14×43 | 14.02 | 10.02 | 0.26 | 0.44 | 43 |
| W14×48 | 14.02 | 10.03 | 0.3 | 0.5 | 48 |
| W16×50 | 16 | 10.03 | 0.28 | 0.5 | 50 |
| W16×57 | 16 | 10.03 | 0.3 | 0.56 | 57 |
| W18×60 | 18 | 11.02 | 0.3 | 0.56 | 60 |
| W18×64 | 18 | 11.03 | 0.32 | 0.62 | 64 |
| W21×68 | 21 | 12 | 0.3 | 0.62 | 68 |
| W21×76 | 21 | 12 | 0.34 | 0.69 | 76 |
| W24×84 | 24 | 12 | 0.34 | 0.75 | 84 |
| W24×104（Sizes Available） | 24 | 12 | 0.4 | 0.88 | 104 |
| Parameter | Typical Range | ASTM A6/A6M Tolerance | Notes |
|---|---|---|---|
| Depth (H) | 100–600 mm (4"–24") | ±3 mm (±1/8") | Must stay within nominal size |
| Flange Width (B) | 100–250 mm (4"–10") | ±3 mm (±1/8") | Ensures stable load-bearing |
| Web Thickness (t_w) | 4–13 mm | ±10% or ±1 mm | Affects shear capacity |
| Flange Thickness (t_f) | 6–20 mm | ±10% or ±1 mm | Critical for bending strength |
| Length (L) | 6–12 m standard; custom 15–18 m | +50 / 0 mm | No minus tolerance allowed |
| Straightness | — | 1/1000 of length | e.g., max 12 mm camber for 12 m beam |
| Flange Squareness | — | ≤4% of flange width | Ensures proper welding/alignment |
| Twist | — | ≤4 mm/m | Important for long-span beams |
Hot Rolled Black:Standard state
Hot-dip galvanizing: ≥85μm (compliant with ASTM A123), salt spray test ≥500h
Coating: The surface of the steel beam was coated with liquid paint by pneumatic spraying.
| Customization Category | Options | Description | MOQ |
|---|---|---|---|
| Dimension | Height (H), Flange Width (B), Web & Flange Thickness (t_w, t_f), Length (L) | Standard or non-standard sizes; cut-to-length service available | 20 tons |
| Surface Treatment | As-rolled (black), Sandblasting/Shot blasting, Anti-rust oil, Painting/Epoxy coating, Hot-dip galvanizing | Improves corrosion resistance for various environments | 20 tons |
| Processing | Drilling, Slotting, Bevel cutting, Welding, End-face processing, Structural prefabrication | Fabricated per drawings; suitable for frames, beams, and connections | 20 tons |
| Marking & Packaging | Custom marking, Bundling, Protective end plates, Waterproof wrapping, Container loading plan | Ensures safe handling and shipping, ideal for sea freight | 20 tons |
Building Constructions: Serve as primary beams and columns in skyscrapers, factories, warehouses, and bridges for carrying structural loads.
Bridge Engineering: As either main or cross members in vehicular and foot bridges.
Industrial & Equipment Support: Solid support for heavy equipment, staging and industrial frames.
Structural Strengthening: Used to strengthen or reinforce existing structures to enhance load bearing and bending capabilities.
Building Structure
Bridge Engineering
Industrial Equipment Support
Structural Reinforcement
1) Branch Office - Spanish-speaking support, customs clearance assistance, etc.
2) Over 5,000 tons of stock in stock, with a wide variety of sizes
3) Inspected by authoritative organizations such as CCIC, SGS, BV, and TUV, with standard seaworthy packaging
Packing:
Bundles are braced with steel straps and spacers between layers to prevent shifting and damage to the surface.
Wrapped with waterproof paper for moisture and rust protection.
Clearly printed with grade/size/heat number/inspection.
Delivery:
By Sea: Containerized or break bulk shipping can be organized depending on size and destination.
Coordinated to ensure safe handling, efficient loading and timely delivery.
Americas Market Transportation Solution:ASTM I Beams are primarily shipped to the Americas via containerized sea freight with steel strapping, end protection, and optional anti-rust treatment to ensure safe and efficient transport.
Q: What are the specifications for your I-beams in central America?
A: Our Ibeams are in accordance with ASTM A36 & A572 Grade 50 which is suitable for Austin America. We can also provide products conforming to the national standards (MEXICO NOM, for instance).
Q: How long is the delivery time to Panama?
A: Transit Time Sea Freight from Tianjin Port to Colon Free Trade Zone 28–32 days wks. Production Leads Time&Delivery Timewhether to use production leads time or delivery time depends on whether buyer need put the goods on his own container, or need us to arrange for shipping. Urgent delivery can be arranged,too.
Q: Can you assist with customs clearance?
A: Yes, our professional brokers will do the customs declaration, pay the tax & all the paper work to ensure the delivery smoothly.
Address
Bl20, Shanghecheng, Shuangjie Street, Beichen District, Tianjin, China
Phone
+86 13652091506
Write your message here and send it to us
