ASTM A620 Cold Rolled Carbon Steel Tube,Pipe, Special Killed

ASTM A620 Cold Rolled Carbon Steel Tube, Special Killed Product Information -:- For detailed product information, please contact sales. -: ASTM A620 Cold Rolled Carbon Steel Tube, Special Killed Synonyms -:- For detailed product information, please contact sales. -:

ASTM A620 Cold Rolled Carbon Steel, Special Killed Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A620 Cold-Rolled Carbon Steel, Special Killed** **ASTM A620** is a standard specification for **cold-rolled carbon steel sheets, strip, and bars** of **Special Killed** quality. This grade is specifically designed for applications requiring exceptional formability, a superior surface finish, and consistent mechanical properties. The "Special Killed" deoxidation process is the key feature, making this steel ideal for complex and severe drawing operations. This steel is typically produced in the as-rolled, annealed, or normalized condition to meet specific mechanical property requirements. --- #### **1. Key International Standards** * **Primary Standard:** **ASTM A620 / A620M** - Standard Specification for Steel, Strip, Carbon, Cold-Rolled, Special Killed. * **Related/Alternative Standards:** * **ASTM A619 / A619M:** A closely related standard for cold-rolled steel, often used for chain, but typically not of "Special Killed" quality. * **ASTM A109:** Standard for Steel, Strip, Carbon, Cold-Rolled (a broader standard for general cold-rolled strip). * **SAE J403:** Chemical Compositions for Carbon Steels. * **EN 10139:** Cold rolled uncoated mild steel narrow strip and coils for cold forming. * **JIS G 3141:** Cold-reduced carbon steel sheets and strip. --- #### **2. Chemical Composition (Heat Analysis)** The chemical composition is tightly controlled with very low carbon and manganese content to maximize softness and formability. The following table represents the maximum percentages for common designations like **CS Type B**. | Element | Composition (%) - Maximum | Notes | | :--- | :--- | :--- | | **Carbon (C)** | 0.10 max | Very low carbon is essential for superior ductility and non-aging properties. | | **Manganese (Mn)** | 0.50 max | Low manganese content further enhances formability. | | **Phosphorus (P)** | 0.03 max | Kept very low to prevent embrittlement and aid in deep drawing. | | **Sulfur (S)** | 0.035 max | Kept very low to improve formability and surface quality. | | **Copper (Cu)** | (Varies by grade) | - | | **Silicon (Si)** | (Varies by grade) | Typically low, as silicon is a deoxidizer and its content is controlled in killed steel. | *Note: The "Special Killed" process involves thorough deoxidation (usually with Aluminum), which results in a steel that is virtually free of gaseous oxygen. This prevents age-hardening and yields a uniform, homogenous microstructure with minimal porosity, which is critical for complex forming.* --- #### **3. Mechanical & Physical Properties** ASTM A620 steel is characterized by its low strength and high elongation, making it one of the most formable carbon steels available. Properties are typically specified for the **Annealed** condition. **Mechanical Properties (Typical for Annealed Condition):** | Property | Typical Value | Unit | | :--- | :--- | :--- | | **Yield Strength (min)** | 25 - 35 | ksi (172 - 241 MPa) | | **Tensile Strength** | 45 - 55 | ksi (310 - 380 MPa) | | **Elongation (in 2 in / 50 mm) (min)** | 28 - 38 | % | | **Modulus of Elasticity** | ~29,000 | ksi (~200 GPa) | | **Hardness (Rockwell B)** | ~50 - 65 | HRB | *Note: The exact mechanical properties can vary based on the thickness and the specific producer's process.* **Physical Properties (Typical):** * **Density:** 0.284 lb/in³ (7850 kg/m³) * **Modulus of Elasticity:** 29,000 ksi (200 GPa) * **Poisson's Ratio:** 0.29 * **Thermal Expansion Coefficient:** 6.5 x 10^-6 /°F (11.7 x 10^-6 /°C) * **Thermal Conductivity:** ~54 W/m·K --- #### **4. Product Applications** The exceptional formability and surface quality of ASTM A620 Special Killed steel make it the material of choice for the most demanding drawing and forming applications: * **Deep Drawing and Complex Stamping:** Automotive oil pans, transmission housings, and complex enclosures. * **High-Quality Exposed Automotive Parts:** Body panels, inner door panels, and other parts requiring a perfect surface for painting. * **Appliance Housings:** Refrigerator doors, washing machine tops, and other parts where a flawless surface finish is critical. * **Electronic Enclosures and Chassis:** Where intricate shapes are formed from a single piece of steel. * **General Metal Stampings:** For applications requiring the highest level of formability beyond that of Commercial Quality (CQ) or Drawing Quality (DQ) steels. --- #### **5. Key Advantages** * **Superior Formability:** Offers the highest ductility among carbon steels, capable of withstanding the most severe drawing and bending operations without cracking. * **Excellent Surface Finish:** The cold-rolling process combined with the killed steel structure provides a smooth, ideal surface for high-quality plating, painting, or other finishes. * **Non-Aging Characteristics:** The Special Killed deoxidation process stabilizes the steel, preventing the gradual loss of ductility (strain aging) over time, which ensures consistent performance during fabrication. * **Consistent Mechanical Properties:** Provides uniform strength and ductility throughout the coil or sheet, which is vital for automated production lines. * **Close Dimensional Tolerances:** Cold-rolling allows for precise control over thickness, width, and flatness. **Disclaimer:** This information is for general reference purposes. For design and critical applications, always consult the latest official **ASTM A620/A620M** standard and technical data sheets from the steel producer to ensure compliance with all specific requirements. -:- For detailed product information, please contact sales. -: ASTM A620 Cold Rolled Carbon Steel, Special Killed Specification Dimensions Size： Diameter 20-1000 mm Length <4496 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 A620 Cold Rolled Carbon Steel, Special Killed Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A620 Cold Rolled Carbon Steel Tube, Special Killed -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A620 Cold Rolled Carbon Steel Tube, Special Killed -:- For detailed product information, please contact sales. -:

Packing of ASTM A620 Cold Rolled Carbon Steel Tube, Special Killed -:- 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 Tube 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 967 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