Bethlehem Steel Rod/Bar BETHSTAR, killed Steel Rod/Bar

Bethlehem Steel Rod BETHSTAR Grade 50 1/4 to 2-1/2 in. thick, killed Steel Rod plate Product Information -:- For detailed product information, please contact sales. -: Bethlehem Steel Rod BETHSTAR Grade 50 1/4 to 2-1/2 in. thick, killed Steel Rod plate Synonyms -:- For detailed product information, please contact sales. -:

Bethlehem Steel BETHSTAR Grade 50 1/4 to 2-1/2 in. thick, killed steel plate Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Bethlehem Steel BETHSTAR® Grade 50 Steel Plate** **Product Overview** Bethlehem Steel BETHSTAR® Grade 50 is a high-quality, fine-grained, **fully killed** structural steel plate offering superior toughness, excellent weldability, and reliable mechanical properties. Designed for critical applications requiring enhanced performance beyond standard carbon steel, this plate undergoes rigorous production controls, including fine-grain practice and deoxidation with silicon and aluminum (killing), ensuring a uniform, sound internal structure with minimal porosity. It is available in thicknesses ranging from **1/4 inch (6.4 mm) to 2-1/2 inches (63.5 mm)**. **Key International Standards & Specifications** BETHSTAR® Grade 50 was Bethlehem Steel's proprietary grade, designed to meet or exceed the requirements of several prominent international and industry specifications: * **Primary Equivalent:** **ASTM A572 / A572M Grade 50** - High-Strength Low-Alloy Columbium-Vanadium Structural Steel. * **Also Conforms To:** **ASTM A529 / A529M Grade 50** (Structural Steel with 50 ksi Yield Point) and the **American Bureau of Shipping (ABS) Guide Rules** for normalized hull structural steel. * **Key Distinction:** As a killed steel, it inherently provides better through-thickness properties and internal soundness compared to semi-killed or rimmed steels, often making it suitable for applications referenced in **ASTM A6** supplementary requirements for improved toughness. **Chemical Composition (Typical, Weight % - Based on ASTM A572 Gr 50)** The killed steel practice, involving aluminum addition, results in a fine austenitic grain size, which translates to enhanced toughness and ductility. | Element | Standard Requirement (Max, unless noted) | Typical BETHSTAR® Grade 50 Aim / Range | | :--- | :--- | :--- | | **Carbon (C)** | 0.23% | 0.18 - 0.22% | | **Manganese (Mn)** | 1.35% | 1.00 - 1.30% | | **Phosphorus (P)** | 0.04% | ≤ 0.025% | | **Sulfur (S)** | 0.05% | ≤ 0.025% | | **Silicon (Si)** | 0.40% | 0.15 - 0.30% (for deoxidation) | | **Columbium (Cb/Nb)** | 0.05% (Vanadium alternative) | 0.005 - 0.030% (for grain refinement & strengthening) | | **Vanadium (V)** | 0.15% (Columbium alternative) | May be used in combination or alone | | **Aluminum (Al), Total** | (For killed steel, min. often required) | ≥ 0.010% (key for fine grain practice) | | **Nitrogen (N)** | - | Controlled | **Physical & Mechanical Properties** | Property | Standard Requirement (ASTM A572 Gr 50) | Typical BETHSTAR® Grade 50 Performance | | :--- | :--- | :--- | | **Yield Strength (Min)** | 50 ksi (345 MPa) | 55 - 65 ksi (380 - 450 MPa) | | **Tensile Strength** | 65 ksi (450 MPa) Min | 70 - 80 ksi (483 - 552 MPa) | | **Elongation in 2" (Min)** | 21% | 22 - 28% | | **Modulus of Elasticity** | ~29,000 ksi (200 GPa) | ~29,000 ksi (200 GPa) | | **Density** | 0.284 lb/in³ (7.85 g/cm³) | 0.284 lb/in³ (7.85 g/cm³) | | **Key Feature** | **Killed Steel & Fine Grain:** Ensures superior internal soundness, improved toughness (particularly in thicker sections), and better through-thickness ductility. Offers excellent Charpy V-Notch impact properties at moderate temperatures. | | **Product Applications** BETHSTAR® Grade 50 was a versatile plate specified for a wide range of structural applications where reliability, weldability, and good low-temperature toughness were essential: * **Heavy Industrial & Commercial Construction:** Primary beams, columns, and connections in bridges, high-rise buildings, and industrial facilities. * **Shipbuilding & Marine Structures:** Hull plating, frames, and other critical components for barges, workboats, and offshore structures (meeting ABS standards). * **Mining & Material Handling Equipment:** Chassis, frames, and buckets for loaders, excavators, and haul trucks where durability is key. * **Pressure Vessels & Storage Tanks:** For shells and heads where killed steel specifications are mandated for integrity. * **General Fabrication:** As a premium alternative to ASTM A36 for any application requiring guaranteed 50 ksi yield strength with enhanced properties. **Advantages & Fabrication Notes** * **Excellent Weldability:** The combination of controlled carbon content and killed steel practice minimizes the risk of weld-related defects. All standard welding processes (SMAW, GMAW, SAW) are readily applicable. * **Superior Toughness:** The fine-grained, killed microstructure provides good resistance to brittle fracture, making it suitable for dynamic or low-temperature service environments. * **Uniform Properties:** The killed steel process ensures consistent mechanical properties throughout the plate thickness and across the entire plate surface. * **Formability:** Offers good cold bending and forming characteristics, consistent with its ductility and yield strength. * **Legacy Product Note:** BETHSTAR® was a branded product line of the now-defunct Bethlehem Steel. Modern equivalents are readily available as ASTM A572 Grade 50 killed steel from major contemporary steel producers. **Disclaimer:** This datasheet describes the historical **Bethlehem Steel BETHSTAR® Grade 50** product based on its conformance to industry standards. For current projects, it is recommended to specify **ASTM A572 Grade 50 (killed, fine-grained)** and source material from active producers who can supply certified mill test reports confirming chemistry, mechanical properties, and killed steel practice. -:- For detailed product information, please contact sales. -: Bethlehem Steel BETHSTAR Grade 50 1/4 to 2-1/2 in. thick, killed steel plate Specification Dimensions Size： Diameter 20-1000 mm Length <4658 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Bethlehem Steel BETHSTAR Grade 50 1/4 to 2-1/2 in. thick, killed steel plate Properties -:- For detailed product information, please contact sales. -:

Applications of Bethlehem Steel Rod BETHSTAR Grade 50 1/4 to 2-1/2 in. thick, killed Steel Rod plate -:- For detailed product information, please contact sales. -: Chemical Identifiers Bethlehem Steel Rod BETHSTAR Grade 50 1/4 to 2-1/2 in. thick, killed Steel Rod plate -:- For detailed product information, please contact sales. -:

Packing of Bethlehem Steel Rod BETHSTAR Grade 50 1/4 to 2-1/2 in. thick, killed Steel Rod plate -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Rod drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1129 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition