ASTM A662 Carbon Steel Sheet,Plate, Grade B

ASTM A662 Carbon Steel Sheet/Plate, Grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A662 Carbon Steel Sheet/Plate, Grade B Synonyms -:- For detailed product information, please contact sales. -:

ASTM A662 Carbon Steel, Grade B Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A662 Grade B Carbon-Silicon Steel Plate** **ASTM A662 Grade B** is a medium-strength, carbon-manganese-silicon steel plate specifically designed for welded pressure vessels and other critical applications operating at **moderate and low-temperature service**. Its primary distinguishing feature is the deliberate addition of silicon, which enhances strength through solid solution strengthening and improves oxidation resistance. Grade B offers a good balance of strength, toughness (particularly at lower temperatures), weldability, and cost-effectiveness, making it a popular choice in heavy fabrication industries. A key characteristic of the A662 specification is its focus on **fine-grain practice** and **normalized heat treatment**. Plates are typically supplied in the normalized condition, which ensures a uniform, refined microstructure. This process is crucial for achieving the required mechanical properties, especially improved notch toughness at the specified service temperatures. --- ### **International Standard & Key Specifications** * **Primary Standard:** **ASTM A662 / A662M** - Standard Specification for Pressure Vessel Plates, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service. * **Common Complementary Specifications:** * **ASME BPVC Section II, Part A:** SA-662 / SA-662M - The ASME Boiler and Pressure Vessel Code version, which is essentially identical and mandatory for ASME stamped pressure equipment. * **ASTM A20/A20M:** Standard Specification for General Requirements for Steel Plates for Pressure Vessels. This specification governs the common testing, inspection, certification, and delivery requirements that apply to A662 plates unless otherwise modified. --- ### **Chemical Composition (Weight %, max unless stated otherwise)** The composition is defined by ASTM A662/A662M. Values are for Grade B. | Element | Composition (%) | | :--- | :--- | | **Carbon (C)** | 0.10 - 0.20 | | **Manganese (Mn)** | 0.90 - 1.35 | | **Phosphorus (P)** | 0.025 | | **Sulfur (S)** | 0.025 | | **Silicon (Si)** | 0.15 - 0.40 | | **Nickel (Ni)** | 0.40 (optional, for enhanced low-temp toughness) | **Note:** The silicon content is a defining element for this grade. The optional addition of Nickel (Ni) is permitted by agreement between purchaser and manufacturer to improve low-temperature impact properties. --- ### **Typical Physical & Mechanical Properties** Properties are for normalized plates. Exact values can vary based on manufacturing process and plate thickness. | Property | Value / Description | | :--- | :--- | | **Tensile Strength** | 415 - 550 MPa (60,200 - 79,800 psi) | | **Yield Strength (min)** | 240 MPa (35,000 psi) | | **Elongation in 2-in (50 mm) (min)** | 23% | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Poisson's Ratio** | ~0.29 | | **Density** | ~7.85 g/cm³ (0.284 lb/in³) | | **Thermal Conductivity** | ~51.9 W/m·K (at 100°C) | | **Coefficient of Thermal Expansion** | ~11.5 x 10⁻⁶ /K (20-100°C) | | **Charpy V-Notch Impact Toughness** | **Test Temperature:** -45°C (-50°F). **Minimum Avg. for 3 Specimens:** 20 J (15 ft·lbf). | --- ### **Product Applications** ASTM A662 Grade B is widely used in the fabrication of welded pressure vessels and structural components where service temperatures are at or below ambient temperature, down to approximately **-45°C (-50°F)**. **Primary Industries and Equipment:** 1. **Petrochemical & Gas Processing:** * LPG (Liquefied Petroleum Gas) storage tanks and bullets * Ammonia storage vessels * Gas scrubbers and separators * Process vessels operating at low temperatures 2. **Power Generation:** * Feedwater heaters * Deaerators * Condenser shells * Other pressure-containing components in power plants 3. **Refrigeration & Cryogenic (for moderate services):** * Storage tanks for refrigerated gases (like CO2) * Components in industrial refrigeration systems 4. **General Pressure Vessel Fabrication:** * A cost-effective material for a wide range of air receivers, heat exchangers (shells and channels), and other custom-designed pressure vessels not subjected to severe corrosion or very high temperatures. --- ### **Advantages and Considerations** * **Advantages:** * **Good Low-Temperature Toughness:** Reliable performance down to -45°C. * **Fine-Grained Structure:** Normalized treatment ensures consistent properties. * **Good Weldability:** Lower carbon content minimizes welding issues like cold cracking; standard welding procedures apply. * **Cost-Effective:** More economical than low-alloy or nickel steels for its temperature range. * **Considerations:** * **Not for High Temperatures:** Not recommended for sustained service above approximately 425°C (800°F). * **Limited Corrosion Resistance:** Like most carbon steels, it requires proper coating or lining for corrosive environments. * **Thickness Limitations:** Mechanical properties, especially toughness, can degrade with increasing plate thickness. Design and procurement must consider the specified thickness range. **In summary, ASTM A662 Grade B is a versatile, normalized carbon-manganese-silicon steel plate that provides an excellent combination of strength, low-temperature toughness, and fabricability for a broad spectrum of pressure vessel applications in the energy and process industries.** -:- For detailed product information, please contact sales. -: ASTM A662 Carbon Steel, Grade B Specification Dimensions Size： Diameter 20-1000 mm Length <4512 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. -: ASTM A662 Carbon Steel, Grade B Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A662 Carbon Steel Sheet,Plate, Grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A662 Carbon Steel Sheet,Plate, Grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A662 Carbon Steel Sheet/Plate, Grade B -:- 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 Sheet/Plate 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 983 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