AISI 1008 Steel, CQ, DQ, and DQSK

AISI 1008 Steel, CQ, DQ, and DQSK sheet, 1.6-5.8 mm thick Product Information -:- For detailed product information, please contact sales. -: AISI 1008 Steel, CQ, DQ, and DQSK sheet, 1.6-5.8 mm thick Synonyms -:- For detailed product information, please contact sales. -:

AISI 1008 Steel, CQ, DQ, and DQSK sheet, 1.6-5.8 mm thick Product Information -:- For detailed product information, please contact sales. -: ## **Product Specification: AISI 1008 Low Carbon Steel Sheet - Commercial & Drawing Qualities** ### **Product Designation** * **Base Grade:** AISI 1008 / SAE 1008 * **UNS Number:** G10080 * **Product Form:** **Sheet** * **Thickness Range:** **1.6 mm to 5.8 mm (0.06 inch to 0.23 inch)** * **Quality Designations:** **CQ (Commercial Quality), DQ (Drawing Quality), DQSK (Drawing Quality, Special Killed)** * **Key Feature:** Identical base chemistry to 1006, but with distinct processing and quality levels optimized for specific forming demands, from general fabrication to severe deep drawing. ### **Overview** AISI 1008 sheet steel is a mainstay low-carbon material produced in a tiered quality system—**CQ, DQ, and DQSK**—within the versatile 1.6-5.8 mm thickness range. While its carbon content is marginally higher than 1006, the **primary differentiator among these qualities is not chemistry, but steelmaking practice, deoxidation control, and internal cleanliness**. This system allows manufacturers to precisely match material performance to application requirements, balancing cost against formability, surface quality, and consistency for everything from simple cabinets to complex automotive body panels. --- ### **1. Chemical Composition (Typical % by Weight)** The base AISI 1008 composition is common, but control and deoxidation practices define the quality. | Element | CQ / DQ / DQSK Typical (%) | Role & Effect & Quality Difference | | :--- | :--- | :--- | | **Carbon (C)** | 0.08 - 0.10 max | Slightly higher than 1006, providing a touch more strength. **DQSK** has the tightest control for uniform behavior. | | **Manganese (Mn)** | 0.30 - 0.50 | Aids deoxidation and imparts slight strength. Consistently controlled in DQ/DQSK. | | **Phosphorus (P)** | 0.040 max | Impurity. Lower levels in DQ/DQSK enhance formability. | | **Sulfur (S)** | 0.050 max | Impurity. Minimized in DQ/DQSK for superior surface finish in stamped parts. | | **Silicon (Si)** | **Key Differentiator.** | **CQ:** Variable; often rimmed or capped (low Si).
**DQ & DQSK:** Aluminum-killed. **DQSK** has very low, controlled Si (<0.05%) to ensure a clean, non-aging surface ideal for painting. | | **Aluminum (Al)** | **Critical for DQ/DQSK.** | Added as a deoxidizer. **DQSK** specifies sufficient aluminum to fully "kill" the steel, tying up nitrogen to **prevent strain aging**, ensuring ductility remains stable over time after forming. | --- ### **2. Physical & Mechanical Properties (1.6-5.8 mm Sheet)** **A. Physical Properties (All Qualities)** * **Density:** 7.87 g/cm³ * **Elastic Modulus:** 200 GPa (29,000 ksi) * **Thermal Conductivity:** High (~62 W/m·K) * **Magnetic Properties:** Ferromagnetic. **B. Mechanical Properties (Typical, As-Rolled/Annealed)** | Property | **Commercial Quality (CQ)** | **Drawing Quality (DQ)** | **Drawing Quality, Special Killed (DQSK)** | | :--- | :--- | :--- | :--- | | **Yield Strength** | 200 - 280 MPa (29 - 41 ksi) | 190 - 260 MPa (28 - 38 ksi) | 170 - 240 MPa (25 - 35 ksi) | | **Tensile Strength** | 320 - 400 MPa (46 - 58 ksi) | 310 - 390 MPa (45 - 57 ksi) | 300 - 370 MPa (44 - 54 ksi) | | **Elongation (50mm)** | 22% - 32% | 28% - 38% | **32% - 42%+** | | **n-value** | Lower, more variable | Moderate, more consistent | **High and consistent** (excellent for stretch forming) | | **r-value** | Lower, variable | Moderate | **High and consistent** (superior for deep drawing) | | **Surface Finish** | Standard mill finish; may exhibit imperfections. | Cleaner, more uniform finish. | **Premium, uniform finish.** Critical for exposed, painted surfaces. | | **Formability** | Suitable for simple bends, roll forming, flat blanks. | Good for moderate drawing and forming. | **Excellent for severe deep drawing, complex stamping.** | | **Strain Aging** | Can exhibit aging (increased YS, loss of ductility over time). | Less prone. | **Non-aging.** Mechanical properties remain stable. | --- ### **3. Product Applications by Quality** **Commercial Quality (CQ):** * **General Fabrication:** Electrical cabinets, junction boxes, ductwork, simple brackets, and panels. * **Non-Critical Parts:** Shelving, backing plates, shields where surface appearance is secondary. * **Painted Assemblies:** Where surface imperfections can be concealed by paint systems. **Drawing Quality (DQ):** * **Appliance Components:** Washer/dryer tops, inner liners, refrigerator cabinets. * **Furniture & Storage:** Office furniture components, filing cabinets, locker panels. * **Automotive Non-Exposed:** Inner structural panels, seat frames, underbody components. * **HVAC:** Formed ductwork and housing components. **Drawing Quality, Special Killed (DQSK):** * **Severe Deep Drawing:** Automotive fuel tanks, oil pans, complex housings. * **Exterior Body Panels:** Automotive doors, hoods, fenders requiring flawless Class-A surfaces for painting. * **Premium Appliances:** Appliance doors, front panels (refrigerators, dishwashers). * **Complex Electronics:** Chassis for computers, audio equipment requiring precise forming. * **Critical Stampings:** Parts with tight tolerances and high risk of splitting. --- ### **4. International Standards & Designations** | Standard System | CQ Equivalent | DQ Equivalent | DQSK Equivalent | Notes | | :--- | :--- | :--- | :--- | :--- | | **ASTM (USA)** | **ASTM A366** (CQ Sheet) | **ASTM A619** (DQ Sheet) | **ASTM A620** (DQSK Sheet) | The definitive U.S. specifications for these quality designations. | | **SAE / AISI** | **SAE 1008** (base grade) | **SAE 1008** with DQ practice | **SAE 1008** with DQSK practice | Quality is defined by processing, not chemistry. | | **DIN / EN (EU)**| **DC01 (EN 10130)** | **DC03 (EN 10130)** | **DC04 (EN 10130)** | EN 10130 is the direct European counterpart. DC01 (CQ), DC03 (DQ), DC04 (DQSK). | | **JIS (Japan)** | **SPCC (JIS G3141)** | **SPCD (JIS G3141)** | **SPCE (JIS G3141)** | The Japanese industry standard. SPCC (CQ), SPCD (DQ), SPCE (DQSK). | | **GB (China)** | **SPCC (GB/T 5213)** | **SPCD (GB/T 5213)** | **SPCE (GB/T 5213)** | Adopts the JIS nomenclature. | --- ### **Selection Guide & Key Considerations** 1. **Cost-to-Performance:** **CQ is most economical**, **DQ offers a balanced upgrade**, and **DQSK commands a premium** for its top-tier consistency and formability. 2. **Forming Severity Rule:** Use **CQ for bending**, **DQ for moderate draws**, and **DQSK for complex, deep draws and stretches**. 3. **Surface Criticality:** For exposed, painted, or plated parts, **always specify DQ or DQSK** to avoid defects like "stretcher strains" or "orange peel." 4. **Part Stability:** If the stamped part must not distort over time (e.g., a flat panel), **DQSK is essential** due to its non-aging characteristic. 5. **Welding & Fabrication:** All qualities weld excellently, but DQSK provides the most predictable results in high-volume production. ### **Summary** **AISI 1008 sheet steel in CQ, DQ, and DQSK qualities (1.6-5.8 mm thick) represents a sophisticated, application-driven material system.** It provides a clear roadmap for selecting the optimal balance of cost, formability, and surface quality for sheet metal fabrication. By choosing the appropriate quality tier, engineers can maximize production yield, part performance, and aesthetic results. The global harmonization of these quality levels under standards like **ASTM A366/A619/A620, EN DC01/03/04, and JIS SPCC/CD/CE** makes this system a universal specification language, ensuring consistent material performance in manufacturing worldwide. -:- For detailed product information, please contact sales. -: AISI 1008 Steel, CQ, DQ, and DQSK sheet, 1.6-5.8 mm thick Specification Dimensions Size： Diameter 20-1000 mm Length <4740 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. -: AISI 1008 Steel, CQ, DQ, and DQSK sheet, 1.6-5.8 mm thick Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1008 Steel, CQ, DQ, and DQSK sheet, 1.6-5.8 mm thick -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1008 Steel, CQ, DQ, and DQSK sheet, 1.6-5.8 mm thick -:- For detailed product information, please contact sales. -:

Packing of AISI 1008 Steel, CQ, DQ, and DQSK sheet, 1.6-5.8 mm thick -:- 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 1211 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