ASTM A442 Carbon Steel Foil/Strip, Grade 55

ASTM A442 Carbon Steel Foil, Grade 55 Product Information -:- For detailed product information, please contact sales. -: ASTM A442 Carbon Steel Foil, Grade 55 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A442 Carbon Steel, Grade 55 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A442 / A442M Carbon Steel, Grade 55** **1. Overview** ASTM A442 Grade 55 is a carbon-manganese-silicon steel specification for pressure vessel plates offering improved toughness and uniformity through killed steel practice and grain refinement. As part of the A442 standard series, Grade 55 provides an optimal balance of strength, toughness, and weldability for pressure vessel applications requiring reliable performance at moderate temperatures. **2. Key International Standards** * **Primary Standard:** **ASTM A442 / A442M** - Standard Specification for Carbon Steel Plates for Pressure Vessels * **Governing Standard:** **ASTM A20/A20M** - Standard Specification for General Requirements for Steel Plates for Pressure Vessels * **International Equivalents:** * **EN 10028-2:** P275GH/P295GH (European pressure vessel steel equivalents) * **JIS G3115:** SB410 (Japanese pressure vessel steel) * **GB 713:** Q245R (Chinese pressure vessel steel equivalent) **3. Chemical Composition (Weight %)** The chemical composition is controlled to achieve specified mechanical properties with good toughness: | Element | Composition (%) | | :---------------- | :---------------------------------- | | Carbon (C), max | 0.24 | | Manganese (Mn) | 0.80 - 1.20 | | Phosphorus (P), max | 0.035 | | Sulfur (S), max | 0.040 | | Silicon (Si) | 0.15 - 0.40 | | **Special Requirements** | **Killed steel, fine grain practice** | *Note: Grade 55 requires killed steel practice with fine austenitic grain size to ensure improved toughness and more consistent mechanical properties through the plate thickness.* **4. Mechanical & Physical Properties** **Mechanical Properties (at room temperature):** | Property | Value | | :--- | :--- | | Tensile Strength | 415 - 550 MPa (60 - 80 ksi) | | Yield Strength (min) | 275 MPa (40 ksi) | | Elongation in 2 in. (50 mm), (min) | 23% | | **Hardness (typical)** | **~150-190 HB** | **Physical Properties:** * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Modulus of Elasticity:** 200 GPa (29 × 10⁶ psi) * **Thermal Conductivity:** ~49.0 W/m·K (at 100°C) * **Coefficient of Thermal Expansion:** ~11.6 × 10⁻⁶/K (20-100°C) * **Specific Heat Capacity:** ~450 J/kg·K **5. Product Applications** ASTM A442 Grade 55 is suitable for various pressure vessel and structural applications: * **Pressure Vessels:** General-purpose pressure containers * **Storage Tanks:** Compressed air receivers, gas storage vessels * **Heat Exchangers:** Shells and tube sheets * **Boiler Components:** Moderate pressure boiler drums and parts * **Industrial Equipment:** Process vessels and containment structures * **Structural Applications:** Where improved toughness is required **6. Key Characteristics & Advantages** * **Improved Toughness:** Fine grain structure provides better impact resistance * **Good Weldability:** Suitable for all conventional welding methods * **Uniform Properties:** Killed steel practice ensures consistent mechanical behavior * **Cost-Effective:** Provides reliable performance at moderate cost * **Good Formability:** Can be cold formed and fabricated easily * **Established Reliability:** Proven performance in pressure containment service **7. Fabrication Considerations** * Supplied in normalized or as-rolled condition * Pre-heating recommended for welding thicker sections * Post-weld heat treatment may be required based on thickness and application * Good bending and forming characteristics * Compatible with common welding processes including SMAW, GMAW, and SAW **8. Quality Assurance** * Fine austenitic grain size requirement * Killed steel practice mandatory * Charpy V-notch testing may be specified for improved toughness * Non-destructive testing available as supplementary requirements ASTM A442 Grade 55 represents a reliable carbon steel option for pressure vessels, providing an excellent balance of strength, toughness, and fabricability for moderate pressure containment applications across various industrial sectors. -:- For detailed product information, please contact sales. -: ASTM A442 Carbon Steel, Grade 55 Specification Dimensions Size： Diameter 20-1000 mm Length <4389 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 A442 Carbon Steel, Grade 55 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A442 Carbon Steel Foil, Grade 55 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A442 Carbon Steel Foil, Grade 55 -:- For detailed product information, please contact sales. -:

Packing of ASTM A442 Carbon Steel Foil/Strip, Grade 55 -:- 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 Foil/Strip 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 860 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