American Steel Structural Profiles ASTM A572 I beam
ASTM A572 Grade 50 Steel I-Beams – Technical Specifications
| Property | Specification / Details |
|---|---|
| Material Standard | ASTM A572 Grade 50 (High-Strength Low-Alloy Structural Steel) |
| Yield Strength | ≥345 MPa (50 ksi); Tensile Strength ≥450–620 MPa |
| Dimensions | W8×18 to W36×300 (inches, W-shape I-beams) |
| Length | Stock: 6 m & 12 m; custom cut-to-length available |
| Dimensional Tolerance | Conforms to ASTM A6 / A6M |
| Quality Certification | EN 10204 3.1; SGS / BV third-party testing (chemical, tensile, impact) |
| Surface Finish | Black, primer painted, hot-dip galvanized; customizable |
| Applications | High-rise buildings, bridges, industrial plants, heavy structures, transportation projects |
| Carbon Equivalent (Ceq) | ≤0.47% (excellent weldability); AWS D1.1 compliant |
| Surface Quality | Free from cracks, laps, or laminations; straightness ≤2 mm/m; flange/web squareness ≤1° |
ASTM A572 Grade 50 – Mechanical Properties & Chemical Composition
| Property | Specification | Description |
|---|---|---|
| Yield Strength | ≥345 MPa (50 ksi) | Stress at which the material begins plastic deformation |
| Tensile Strength | 450–620 MPa (65–90 ksi) | Maximum stress before fracture under tension |
| Elongation | ≥18% | Plastic deformation over 200 mm gauge length |
| Hardness (Brinell) | 135–180 HB | Reference value for material hardness |
| Carbon (C) | ≤0.23% | Controls strength level and weldability |
| Manganese (Mn) | 0.50–1.60% | Enhances strength, hardness, and toughness |
| Sulfur (S) | ≤0.05% | Lower sulfur improves ductility and toughness |
| Phosphorus (P) | ≤0.04% | Restricted to improve toughness and fatigue performance |
| Silicon (Si) | ≤0.40% | Strengthens steel and improves deoxidation during steelmaking |
| 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: Liquid paint was evenly sprayed onto the surface of the steel beam using a pneumatic spray gun.
| 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 Structures: Beams and columns for skyscrapers, factories, warehouses, and bridges which serve as primary load-bearing elements.
Bridge Engineering: Primary or secondary beams for both vehicular and pedestrian bridges.
Heavy Equipment & Industrial Support: Heavy equipment and industrial platforms support.
Structural Strengthening: Strengthening or altering an existing structure to resist higher loads or to resist bending.
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
Full Protection: I-beams are wrapped with tarpaulin along with 2–3 desiccant packets; the heat-sealing, rainproof tarpaulin sheets prevent moisture from entering.
Secure Bundling: Each bundle is wrapped with 12–16 mm steel straps; easy for 2–3 tons and US compatible lifting equipment.
Transparent Labeling: Bilingual labels (English and Spanish) with grade, specifications, HS code, batch # and a reference to the test report.
High profile protection: I-beams ≥800 mm were treated with an alignment oil and were then wrapped with a tarpaulin twice.
Delivery
Reliable Shipping: Cooperation for best carriers (MSK, MSC, COSCO ect) to ensure safety shipping.
Quality Control: ISO 9001 system; Beams are tightly controlled from packaging through transport to ensure they arrive intact, allowing you to have a trouble free project.
Q: What are the standards for your I-beams in Central America?
A: Our I Beams comply with the ASTM A36 & A572 Grade 50 which is favorable for Central America. It is also possible to supply products which meet national standards (e.g., MEXICO NOM).
Q: How long time to delivery to Panama?
A: Transit Time Sea Freight from Tianjin Port to Colon Free Trade Zone 28–32 days wks. Production and delivery in total is 45–60 days. Urgent delivery can be arranged,too.
Q: Do you help with customs clearance?
A: Yes, our professional brokers will do the customs declaration, pay the tax & all the paper work to make sure the delivery smoothly.
Address
Bl20, Shanghecheng, Shuangjie Street, Beichen District, Tianjin, China
Phone
+86 13652091506
