Bethlehem Steel ASTM A656 Grade 70 Type 7,steel

Bethlehem Steel ASTM A656 Grade 70 Type 7, 3/16 to 1 in. thick, steel plate Product Information -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A656 Grade 70 Type 7, 3/16 to 1 in. thick, steel plate Synonyms -:- For detailed product information, please contact sales. -:

Bethlehem Steel ASTM A656 Grade 70 Type 7, 3/16 to 1 in. thick, steel plate Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Bethlehem Steel ASTM A656 Grade 70 Type 7 Steel Plate** **Product Overview** Bethlehem Steel ASTM A656 Grade 70 Type 7 is a high-strength, low-alloy (HSLA) steel plate produced via thermo-mechanical controlled processing (TMCP). It is specifically designed to offer an exceptional combination of high yield strength, good weldability, and improved formability compared to conventional HSLA grades. The "Type 7" designation indicates that this plate is supplied in the as-rolled condition (Type 1 would be normalized). It is available in thicknesses ranging from **3/16 inch (4.8 mm) to 1 inch (25.4 mm)**. This grade is engineered for applications where reducing structural weight without compromising strength or durability is a critical requirement. **Key International Standards** * **Primary Standard:** **ASTM A656 / A656M** - Standard Specification for Hot-Rolled Structural Steel, High-Strength Low-Alloy Plate with Improved Formability. * **Note:** While Bethlehem Steel was a major producer referencing this ASTM standard, specific mill practices and proprietary adjustments (within the standard's limits) were often applied. For current production, it is essential to consult active steelmakers producing to this specification. **Chemical Composition (Typical, Weight % - ASTM A656 Limits)** The composition is carefully balanced to achieve the desired physical properties through controlled rolling. | Element | Standard Requirement (Max, unless noted) | Typical Bethlehem Steel Aim | | :--- | :--- | :--- | | **Carbon (C)** | 0.18% | 0.10 - 0.16% | | **Manganese (Mn)** | 1.60% | 1.20 - 1.50% | | **Phosphorus (P)** | 0.025% | ≤ 0.020% | | **Sulfur (S)** | 0.025% | ≤ 0.010% | | **Silicon (Si)** | 0.40% | 0.15 - 0.30% | | **Niobium (Nb)** | 0.05 - 0.15% | 0.05 - 0.10% | | **Vanadium (V)** | 0.08% (optional) | May be added in combination with Nb | | **Nitrogen (N)** | 0.015% | Controlled | | **Aluminum (Al)** | 0.01 - 0.10% (min. for grain refinement) | 0.02 - 0.06% | *(Note: Specific "Bethlehem Steel" chemistries may have varied slightly by heat and thickness. The above represents a typical, achievable range within the standard.)* **Physical & Mechanical Properties (ASTM A656 Grade 70 Requirements)** | Property | Requirement | Typical Performance (Bethlehem) | | :--- | :--- | :--- | | **Yield Strength (Min)** | 70 ksi (485 MPa) | 75 - 85 ksi (517 - 586 MPa) | | **Tensile Strength** | 80 - 100 ksi (550 - 690 MPa) | 82 - 95 ksi (565 - 655 MPa) | | **Elongation in 2" (Min)** | 18% | 20 - 25% | | **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** | **Improved Formability**: This grade is characterized by a lower yield-to-tensile ratio and good elongation, allowing for more severe cold forming than standard Grade 70 steels. | | **Product Applications** Bethlehem Steel's A656 Gr 70 Type 7 plate was historically specified for demanding structural and mobile equipment applications where its superior strength-to-weight ratio and formability were advantageous: * **Heavy-Duty Truck & Trailer Components:** Frame rails, fifth wheels, dump body floors, and high-stress brackets. * **Construction & Mining Equipment:** Booms, arms, buckets, and structural frames for excavators, cranes, and loaders. * **Material Handling Equipment:** Forklift masts, heavy-duty lift truck frames, and crane runways. * **Railcar Components:** For weight-sensitive car body structures. * **General Fabrication:** For any fabricated part requiring high strength, good weldability, and the ability to be formed without heat treatment. **Advantages & Fabrication Notes** * **Weldability:** Excellent for its strength level due to controlled carbon content and carbon equivalent (typically CE ≤ 0.40). Standard welding procedures (SMAW, GMAW, FCAW) used for HSLA steels are applicable. * **Formability:** Superior to traditional HSLA 70 grades, allowing for more complex cold bends and forming operations without cracking. * **Weight Savings:** Enables the design of lighter, stronger structures, improving payload capacity and fuel efficiency in transportation equipment. * **Availability:** As Bethlehem Steel is no longer operational, this specific product is considered a legacy or historical material. Equivalent or superior grades are available from modern steel producers using updated TMCP technologies (e.g., ASTM A841 or proprietary mill grades). **Disclaimer:** This datasheet is based on historical data for products manufactured by **Bethlehem Steel Corporation**. For current projects, engineers should specify the active ASTM standard (A656) and work with contemporary steel suppliers to obtain mill test certificates and recommended fabrication guidelines for material meeting this specification. -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A656 Grade 70 Type 7, 3/16 to 1 in. thick, steel plate Specification Dimensions Size： Diameter 20-1000 mm Length <4656 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 ASTM A656 Grade 70 Type 7, 3/16 to 1 in. thick, steel plate Properties -:- For detailed product information, please contact sales. -:

Applications of Bethlehem Steel ASTM A656 Grade 70 Type 7, 3/16 to 1 in. thick, steel plate -:- For detailed product information, please contact sales. -: Chemical Identifiers Bethlehem Steel ASTM A656 Grade 70 Type 7, 3/16 to 1 in. thick, steel plate -:- For detailed product information, please contact sales. -:

Packing of Bethlehem Steel ASTM A656 Grade 70 Type 7, 3/16 to 1 in. thick, steel 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 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 1127 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