ASTM A662 Carbon Steel Sheet,Plate, Grade C

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

ASTM A662 Carbon Steel, Grade C Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ASTM A662 Grade C Carbon-Manganese-Silicon Steel Plate** **ASTM A662 Grade C** is a medium-strength, fine-grained carbon-manganese-silicon steel plate within the ASTM A662 specification, designed specifically for **welded pressure vessels and critical structures operating at moderate to low temperatures**. It offers a higher minimum yield strength than Grade B, providing an optimal balance of strength, notch toughness, weldability, and cost-effectiveness for demanding industrial applications. The steel is supplied in the **normalized heat treatment condition**, which refines the grain structure to ensure consistent mechanical properties and enhanced impact toughness at sub-zero 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. * **Mandatory Companion Standard:** **ASTM A20/A20M** - Standard Specification for General Requirements for Steel Plates for Pressure Vessels. This governs testing, inspection, tolerances, and certification. * **ASME Code Equivalent:** **SA-662 / SA-662M** in ASME Boiler and Pressure Vessel Code, Section II, Part A. This is the mandatory specification for ASME-stamped pressure equipment fabrication. --- ## **Chemical Composition (Weight %, max unless range is specified)** Composition is per ASTM A662/A662M for Grade C. | Element | Composition (%) | | :--- | :--- | | **Carbon (C)** | 0.10 - 0.20 | | **Manganese (Mn)** | 1.15 - 1.50 | | **Phosphorus (P)** | 0.025 | | **Sulfur (S)** | 0.025 | | **Silicon (Si)** | 0.15 - 0.40 | | **Nickel (Ni)** | 0.40 (optional, for enhanced low-temp toughness) | **Key Notes on Chemistry:** * **Higher Manganese:** The primary difference from Grade B is the elevated manganese content (1.15-1.50% vs. 0.90-1.35%). This increases strength and hardenability, and contributes to improved low-temperature toughness. * **Silicon Content:** The deliberate Si addition provides solid-solution strengthening and improves oxidation resistance. * **Optional Nickel:** Up to 0.40% Ni may be added by agreement to further enhance impact properties for specific low-temperature requirements. --- ## **Typical Physical & Mechanical Properties** Properties are for normalized plates. Minimum mechanical properties are specified by ASTM A662. | Property | Value / Description | | :--- | :--- | | **Tensile Strength** | 450 - 585 MPa (65,300 - 84,900 psi) | | **Yield Strength (min)** | **290 MPa (42,000 psi)** | | **Elongation in 2-in (50 mm) (min)** | 22% | | **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:** **-60°C (-75°F)**. **Minimum Avg. for 3 Specimens:** 20 J (15 ft·lbf). | **Critical Distinction from Grade B:** Grade C is designed for service at a **lower temperature (-60°C / -75°F)** while providing a **higher minimum yield strength (290 MPa vs. 240 MPa)**. This makes it suitable for more demanding applications. --- ## **Product Applications** ASTM A662 Grade C is the preferred material for pressure vessels and structural components where a combination of higher strength and reliable performance at lower temperatures is required. **Primary Industries and Equipment:** 1. **Petrochemical & Natural Gas Processing:** * Pressure vessels for gas separation and treatment at low temperatures. * LPG and liquid ammonia storage tanks operating in colder climates. * Scrubbers, knockout drums, and process columns. 2. **Refrigeration & Cryogenic Storage (Moderate Level):** * Tanks for storing liquefied gases like CO2, ethylene, and certain refrigerants. * Vessels in industrial cascade refrigeration systems. 3. **Power Generation:** * Feedwater heaters, moisture separator reheaters (MSRs), and deaerator shells, especially where low ambient design temperatures are a factor. 4. **Offshore & Maritime:** * Process modules and support structures on offshore platforms exposed to cold North Sea or Arctic environments. * Barges and shipboard tanks for certain low-temperature cargoes. 5. **General Heavy Fabrication:** * Mining equipment and structural components for cold-region operations. --- ## **Advantages and Fabrication Considerations** * **Advantages:** * **Superior Strength-Toughness Combination:** Higher yield strength than Grade B, coupled with guaranteed toughness at -60°C. * **Excellent Weldability:** The controlled carbon content and CE (Carbon Equivalent) allow it to be welded using common processes (SMAW, SAW, GMAW) with standard preheat and post-weld heat treatment procedures. * **Cost-Effective Performance:** Provides capabilities approaching those of low-alloy steels at a lower material cost for its designated temperature range. * **Normalized Consistency:** The heat treatment ensures uniform properties throughout the plate thickness and across the production batch. * **Fabrication Considerations:** * **Preheat & Interpass Temperature:** Required for thicker sections to prevent hydrogen-induced cracking (HIC). Specific temperatures should follow applicable codes (e.g., ASME Section VIII, Div. 1). * **Post-Weld Heat Treatment (PWHT):** Often required for pressure vessel fabrications to relieve residual stresses, especially for thicker welds. * **Not for High-Temperature Service:** Like Grade B, it is not recommended for prolonged service above ~425°C (800°F). **In summary, ASTM A662 Grade C is a robust, normalized carbon steel plate engineered to deliver higher strength and reliable low-temperature toughness down to -60°C. It is a fundamental material for engineers designing pressure vessels and structural components for the energy, petrochemical, and processing industries operating in cold environments.** -:- For detailed product information, please contact sales. -: ASTM A662 Carbon Steel, Grade C Specification Dimensions Size： Diameter 20-1000 mm Length <4513 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 C Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A662 Carbon Steel Sheet/Plate, Grade C -:- 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 984 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