Bethlehem Steel ASTM A573 Grade 65, steel

Bethlehem Steel ASTM A573 Grade 65 3/16 to 1/2 in. thick, steel plate Product Information -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A573 Grade 65 3/16 to 1/2 in. thick, steel plate Synonyms -:- For detailed product information, please contact sales. -:

Bethlehem Steel ASTM A573 Grade 65 3/16 to 1/2 in. thick, steel plate Product Information -:- For detailed product information, please contact sales. -: **Product Introduction: Bethlehem Steel ASTM A573 Grade 65 Steel Plate (3/16" to 1/2" thick)** **Product Overview** Bethlehem Steel ASTM A573 Grade 65 is a high-strength, carbon-silicon structural steel plate belonging to the **"improved toughness"** product line. Designed for applications demanding a superior combination of strength and impact resistance, this grade offers a minimum yield strength of 65 ksi. Supplied in thicknesses from 3/16 inch (4.8 mm) to 1/2 inch (12.7 mm), it provides engineers with a reliable material for critical, dynamically loaded components where both high load-bearing capacity and resistance to brittle fracture are essential design criteria. **Key International Standard** * **ASTM A573 / A573M:** *Standard Specification for Structural Carbon Steel Plates of Improved Toughness.* Grade 65 designates a minimum yield strength of 65 ksi (450 MPa). This standard is globally referenced for structural applications where verified notch toughness is required alongside specified strength levels. **Chemical Composition (Typical, weight %)** The composition is carefully balanced to achieve higher strength while maintaining the fine-grained microstructure necessary for toughness. It is a carbon-manganese-silicon steel, often aluminum-killed for grain refinement. * **Carbon (C):** 0.23% max (Controlled to optimize strength and weldability) * **Manganese (Mn):** 0.85 - 1.20% (Key element for strength and hardenability) * **Phosphorus (P):** 0.035% max * **Sulfur (S):** 0.040% max * **Silicon (Si):** 0.15 - 0.40% (Contributes to deoxidation and solid solution strengthening) * **Grain Refinement:** Produced to a fine austenitic grain size practice, typically achieved through aluminum deoxidation (killing), which is a mandatory requirement of the A573 specification. **Physical & Mechanical Properties (For plates 3/16" to 1/2" thick)** * **Tensile Strength:** 75 - 95 ksi (515 - 655 MPa) * **Yield Strength (min):** 65 ksi (450 MPa) * **Elongation in 2" (min):** 19% * **Elongation in 8" (min):** 21% * **Key Differentiator - Charpy V-Notch Impact Test:** Plates over 0.375" (9.5mm) thick are required to meet impact energy absorption of **15 ft-lbf (20 J)** at a specified test temperature. This verifies improved toughness over standard structural grades. * **Modulus of Elasticity:** ~29,000 ksi (200 GPa) * **Density:** 0.284 lb/in³ (7.85 g/cm³) * **Weldability:** Good to Very Good. The carbon content is moderate, and the fine grain structure is beneficial. However, due to the higher strength level, welding requires more care than for lower-strength grades. The use of **low-hydrogen welding processes** and proper procedure qualification (including potential preheat for thicknesses approaching 1/2" in restrained joints) is recommended to maintain heat-affected zone (HAZ) properties and prevent cracking. **Product Applications** ASTM A573 Grade 65 is specified for critical structural applications where high strength must be coupled with assured toughness, particularly in welded assemblies subject to dynamic or impact loads. * **Heavy Machinery & Equipment:** High-stress components in mining shovels, excavator linkage systems, press frames, and crane boom sections where shock loading occurs. * **Transportation:** Critical chassis members, suspension components, and fifth wheels for heavy-duty trucks and specialized trailers. * **Material Handling:** High-capacity lifting lugs, spreader bars, and structural elements for heavy-duty forklifts and container handlers. * **Energy & Infrastructure:** Critical welded connections and support brackets in bridges, power generation structures, and offshore platforms (non-primary). * **Defense Applications:** Structural components for military vehicles and equipment requiring a blend of high strength and impact resistance. **Additional Information** * **Condition:** Typically supplied in the as-rolled condition. It can also be furnished normalized if specified for more uniform through-thickness properties. * **Distinction from A572 Grade 65:** Both grades have a 65 ksi minimum yield. However, **ASTM A573 Grade 65 mandates Charpy impact testing** to verify toughness, whereas A572 Grade 65 is primarily a high-strength, low-alloy grade focused on strength-to-weight ratio without a standardized toughness requirement. A573 is the choice when *verified impact properties* are a specification requirement. * **Availability:** This represents a premium, high-performance product grade. Steel plate meeting ASTM A573 Grade 65 is produced by mills with precise process controls. **Disclaimer** The information provided is based on the ASTM standard and typical industry data. For engineering and procurement, it is imperative to consult: 1. The latest official **ASTM A573/A573M** specification. 2. Applicable design codes and project-specific material requirements. 3. The certified **Mill Test Report (MTR)** for the specific material, which verifies chemistry, mechanical properties, and **Charpy V-Notch impact test results**. 4. A qualified **Welding Procedure Specification (WPS)** developed and tested for this specific grade and application. -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A573 Grade 65 3/16 to 1/2 in. thick, steel plate Specification Dimensions Size： Diameter 20-1000 mm Length <4633 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 A573 Grade 65 3/16 to 1/2 in. thick, steel plate Properties -:- For detailed product information, please contact sales. -:

Applications of Bethlehem Steel ASTM A573 Grade 65 3/16 to 1/2 in. thick, steel plate -:- For detailed product information, please contact sales. -: Chemical Identifiers Bethlehem Steel ASTM A573 Grade 65 3/16 to 1/2 in. thick, steel plate -:- For detailed product information, please contact sales. -:

Packing of Bethlehem Steel ASTM A573 Grade 65 3/16 to 1/2 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 1104 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