AISI 1020 Steel, cold rolled

AISI 1020 Steel, cold rolled Product Information -:- For detailed product information, please contact sales. -: AISI 1020 Steel, cold rolled Synonyms -:- For detailed product information, please contact sales. -:

AISI 1020 Steel, cold rolled Product Information -:- For detailed product information, please contact sales. -: # **Product Specification: AISI 1020 Low Carbon Steel, Cold-Rolled Sheet/Strip** ## **Product Identification** * **Standard Designation:** AISI 1020 / SAE 1020 * **UNS Number:** G10200 * **Condition:** Cold-Rolled (Full Hard to Annealed Tempers) * **Product Form:** Sheet, Strip, Coil * **Common Thickness:** 0.5 mm to 3.0 mm (0.020" to 0.120") * **Key Feature:** Premium surface finish with precise thickness control, ideal for formed and stamped components ## **Overview** AISI 1020 cold-rolled steel represents the premium sheet product form of this versatile low-carbon steel. Through cold reduction and precise rolling, the material achieves superior surface quality, tight dimensional tolerances, and enhanced mechanical properties compared to hot-rolled equivalents. Available in various tempers from full hard to annealed, cold-rolled 1020 offers manufacturers exceptional consistency for high-volume forming, stamping, and fabrication operations. Its balanced chemistry provides excellent weldability combined with good strength, making it a preferred choice for automotive body panels, appliance components, and precision industrial parts. --- ## **1. Chemical Composition (Weight %, AISI/SAE Standard)** | Element | Content (%) | Metallurgical Significance in Cold-Rolled Form | |---------|-------------|-----------------------------------------------| | **Carbon (C)** | 0.18 - 0.23 | Provides strength while maintaining formability | | **Manganese (Mn)** | 0.30 - 0.60 | Standard range for low-carbon steel | | **Phosphorus (P)** | ≤ 0.040 | Controlled for improved formability | | **Sulfur (S)** | ≤ 0.050 | Standard impurity level | | **Silicon (Si)** | 0.15-0.35 | Deoxidizer (typically aluminum-killed for CR) | | **Iron (Fe)** | Balance | Matrix element | **Cold-Rolling Specifics:** - **Deoxidation Practice:** Typically aluminum-killed for superior surface quality - **Chemistry Control:** Tighter than hot-rolled for consistency - **Surface Quality:** Premium finish requirements dictate strict chemistry limits --- ## **2. Physical & Mechanical Properties** ### **A. Physical Properties (Cold-Rolled Condition)** - **Density:** 7.87 g/cm³ (0.284 lb/in³) - **Elastic Modulus:** 200 GPa (29,000 ksi) - **Poisson's Ratio:** 0.29 - **Thermal Conductivity:** ~57.0 W/m·K - **Electrical Resistivity:** ~11.3 μΩ·cm - **Magnetic Properties:** Strongly ferromagnetic - **Surface Reflectivity:** High (60-70% of polished standard) ### **B. Mechanical Properties by Temper** | Temper Designation | Yield Strength | Tensile Strength | Elongation | Hardness | Typical Applications | |-------------------|----------------|------------------|------------|----------|---------------------| | **Full Hard** | 550-690 MPa | 590-740 MPa | 2-5% | 84-92 HRB | Springs, flat parts | | **Half Hard** | 415-550 MPa | 485-620 MPa | 8-12% | 70-84 HRB | Moderate forming | | **Quarter Hard** | 310-415 MPa | 380-485 MPa | 12-18% | 60-74 HRB | General forming | | **Skin Rolled** | 275-345 MPa | 340-415 MPa | 20-25% | 50-65 HRB | Light forming | | **Annealed** | 230-310 MPa | 310-380 MPa | 25-35% | 45-60 HRB | Severe forming | ### **C. Formability Properties** | Parameter | Value Range | Significance | |-----------|-------------|--------------| | **n-value** | 0.18-0.22 | Strain hardening exponent | | **r-value** | 0.9-1.1 | Normal anisotropy | | **Δr-value** | 0.1-0.3 | Planar anisotropy | | **Limit Drawing Ratio** | 1.8-2.1 | Deep drawing capability | | **Minimum Bend Radius** | 0.5-1.0 × t | Depending on temper | --- ## **3. Surface Characteristics** ### **Surface Finish Options** | Finish Designation | Roughness (Ra) | Typical Application | |-------------------|----------------|---------------------| | **Commercial Bright** | 0.4-0.8 μm | General stamping | | **Extra Smooth** | 0.2-0.4 μm | Exposed automotive | | **Temper Rolled** | 0.3-0.6 μm | Paint-ready surfaces | | **Matt/Matte** | 0.6-1.2 μm | Non-reflective applications | ### **Surface Defect Standards** - **Class 1 (Commercial):** Minor imperfections allowed - **Class 2 (Drawing Quality):** Strict limits on defects - **Class 3 (Exposed Automotive):** Near-perfect surface required - **Oiling:** Standard mill oil or dry finish available --- ## **4. Product Applications** ### **Automotive Industry** - **Body Panels:** Door skins, hoods, fenders (annealed temper) - **Structural Components:** Brackets, reinforcements (half hard) - **Trim & Molding:** Decorative trim components - **Fuel System Parts:** Tanks, lines (deep drawing quality) ### **Appliance Manufacturing** - **Housings:** Refrigerator, washer, dryer cabinets - **Internal Components:** Shelves, racks, brackets - **Control Panels:** Front facias and control surfaces - **Fastener Stock:** For appliance-specific fasteners ### **General Manufacturing** - **Office Furniture:** File cabinets, desk components - **Electrical Enclosures:** Control boxes, junction boxes - **HVAC Components:** Ductwork, vents, covers - **Signage & Display:** Retail displays, signage backings ### **Specialized Applications** - **Precision Stampings:** Electronic components, connectors - **Tooling Components:** Jigs, fixtures, templates - **Art & Architecture:** Decorative metalwork - **Food Equipment:** Non-critical food contact surfaces --- ## **5. International Standards & Equivalents** ### **Direct Equivalents** | Standard System | Designation | Condition | Notes | |-----------------|-------------|-----------|-------| | **AISI/SAE** | **1020 CR** | Cold-Rolled | Base standard | | **ASTM** | **ASTM A366** | Commercial Quality | CR sheet standard | | **ASTM** | **ASTM A619** | Drawing Quality | DQ specification | | **DIN/EN** | **DC01** | EN 10130 | Cold-rolled mild steel | | **JIS** | **SPCC** | JIS G3141 | Cold-rolled carbon steel | | **GB** | **SPCC** | GB/T 5213 | Chinese equivalent | | **ISO** | **CR2/CR3** | ISO 3574 | Commercial/Drawing quality | ### **Temper Designation Equivalents** | AISI Temper | EN Designation | JIS Designation | Hardness Range | |-------------|----------------|-----------------|----------------| | **Full Hard** | H | 1/4H | ≥92 HRB | | **Half Hard** | 1/2H | 1/2H | 70-84 HRB | | **Quarter Hard** | 1/4H | 1/8H | 60-74 HRB | | **Skin Rolled** | S | S | 50-65 HRB | | **Annealed** | A | A | ≤65 HRB | --- ## **6. Processing Characteristics** ### **Forming & Stamping** | Operation | Recommended Conditions | Limitations | |-----------|------------------------|-------------| | **Deep Drawing** | Annealed temper, proper lubrication | LDR ≤ 2.1 | | **Stretch Forming** | Quarter to half hard tempers | Watch for necking | | **Bending** | All tempers with proper radius | Min radius = 0.5t | | **Roll Forming** | Half hard to full hard | Progressive tooling | | **Embossing** | Annealed to quarter hard | Depth ≤ material thickness | ### **Cutting & Blanking** 1. **Shearing:** Clean edges with proper clearance (5-10% of thickness) 2. **Laser Cutting:** Excellent results, minimal dross 3. **Punching:** Standard tool steels, proper die clearance 4. **Nibbling:** Suitable for prototypes and short runs ### **Joining Methods** - **Welding:** All processes applicable, excellent weldability - **Adhesive Bonding:** Good with proper surface preparation - **Mechanical Fastening:** Self-tapping screws, rivets, clinching - **Soldering/Brazing:** Excellent for electrical applications ### **Surface Treatment** - **Phosphating:** Excellent for paint adhesion - **Electroplating:** Zinc, nickel, chrome plate well - **Painting/Powder Coating:** Superior surface for finishes - **Anodizing:** Not applicable (non-aluminum) --- ## **7. Quality Standards & Testing** ### **Dimensional Tolerances** | Parameter | Commercial Quality | Drawing Quality | |-----------|-------------------|-----------------| | **Thickness** | ±0.08 mm | ±0.05 mm | | **Width** | +3/-0 mm | +1/-0 mm | | **Length** | +6/-0 mm | +3/-0 mm | | **Flatness** | 5 mm/m | 3 mm/m | | **Camber** | 2 mm/m | 1 mm/m | ### **Mechanical Testing** | Test | Standard | Frequency | Requirements | |------|----------|-----------|--------------| | **Tensile Test** | ASTM A370 | Per coil/heat | Meet temper specs | | **Hardness Test** | ASTM E18 | Per coil | Within temper range | | **Bend Test** | ASTM E190 | As required | 180° around own thickness | | **Cup Test** | ASTM E643 | DQ material | Minimum depth | ### **Surface Quality Testing** - **Visual Inspection:** 100% for exposed surfaces - **Surface Roughness:** Per customer specification - **Oiling Weight:** Typically 1-3 g/m² - **Cleanliness:** Oil, dirt, residue limits --- ## **8. Technical Comparison** ### **vs. Hot-Rolled 1020** | Parameter | Cold-Rolled Advantage | Magnitude | |-----------|----------------------|-----------| | **Surface Finish** | Dramatically better | 75-90% smoother | | **Dimensional Tolerance** | Much tighter | 50-70% improvement | | **Strength Consistency** | More uniform | Across entire coil | | **Forming Consistency** | More predictable | Reduced springback | | **Cost Premium** | 20-40% higher | Depends on quantity | ### **vs. Other CR Grades** | Grade Comparison | 1020 Advantage | Application Impact | |------------------|----------------|-------------------| | **1008/1010 CR** | Higher strength | Reduced gauges possible | | **1018 CR** | Better formability | More severe draws | | **1030 CR** | Better weldability | Less preheat required | | **Galvanized** | Better surface for painting | A-class surfaces | --- ## **9. Economic Considerations** ### **Cost Factors** | Factor | Impact Level | Typical Range | |--------|--------------|---------------| | **Base Material Cost** | High | 60-70% of total | | **Surface Quality Premium** | Moderate | 10-20% additional | | **Temper Specific Cost** | Low | 5-15% variation | | **Quantity Discounts** | Significant | 10-25% for volume | | **Special Testing** | Low | 2-5% additional | ### **Supply Chain Factors** - **Minimum Order Quantity:** 2-5 tons typical - **Lead Times:** 4-8 weeks standard - **Coil Weights:** 5-20 tons maximum - **Width Availability:** 600-1500 mm standard - **Temper Availability:** All standard tempers stocked ### **Total Cost Analysis** 1. **Material Utilization:** Higher with precise dimensions 2. **Processing Costs:** Reduced secondary operations 3. **Quality Costs:** Lower rejection rates 4. **Finish Costs:** Reduced surface preparation 5. **Performance Benefits:** Extended product life --- ## **10. Packaging & Handling** ### **Standard Packaging** | Package Type | Typical Size | Protection | |--------------|--------------|------------| | **Coil** | 5-20 tons | Steel strapping, caps | | **Cut Length** | Stacked, banded | Corner protectors | | **Sheet Packs** | 2-5 tons | Paper interleaving | | **Blank Packs** | Custom sizes | Full wrapping | ### **Protection Methods** - **VCI Paper:** For extended storage - **Polyethylene Wrap:** Weather protection - **Desiccant Packs:** Humidity control - **Edge Protection:** Cardboard or plastic caps ### **Handling Recommendations** 1. **Lifting:** Proper spreader bars for coils 2. **Storage:** Flat, dry conditions 3. **Stacking:** Limit height to prevent damage 4. **Transportation:** Secure to prevent movement --- ## **Summary** **AISI 1020 cold-rolled steel represents the premium sheet product form that delivers exceptional surface quality, dimensional precision, and consistent mechanical properties for demanding manufacturing applications.** Through controlled cold reduction and precise processing, this material transforms the basic 1020 chemistry into a high-performance manufacturing substrate ideal for formed, stamped, and fabricated components. **Key Value Propositions:** 1. **Superior Surface Quality:** Excellent for painting, plating, or exposed surfaces 2. **Dimensional Precision:** Tight tolerances reduce secondary operations 3. **Property Consistency:** Predictable behavior in high-volume production 4. **Manufacturing Efficiency:** Reduced scrap and improved yields **Technical Superiority Areas:** - **Surface Finish:** Ra values as low as 0.2 μm achievable - **Thickness Control:** ±0.05 mm tolerance standard - **Formability Range:** Available from full hard to annealed tempers - **Weldability:** Excellent for all joining processes **Ideal Application Scenarios:** - Automotive body panels requiring Class A surfaces - Appliance components needing consistent forming - Electrical enclosures requiring precise dimensions - Fabricated parts where surface quality is critical **Market Position:** Cold-rolled 1020 occupies a strategic position between basic hot-rolled products and more expensive coated or specialty steels. Its availability in various tempers and surface finishes makes it adaptable to diverse manufacturing requirements while maintaining cost-effectiveness. **Selection Guidance:** 1. **Choose CR over HR when:** Surface quality or dimensional precision is critical 2. **Select temper based on:** Required forming severity and final strength needs 3. **Consider surface finish:** Based on final appearance requirements 4. **Evaluate total cost:** Including processing savings from better material **Global Standardization:** With widespread adoption as **EN DC01**, **JIS SPCC**, and **ASTM A366/A619**, cold-rolled 1020 offers consistent global availability and quality standards. This standardization ensures reliable performance across international supply chains. **Final Recommendation:** For manufacturers requiring consistent, high-quality sheet material with excellent formability and weldability, AISI 1020 cold-rolled provides an optimal balance of performance and cost. Its versatility across tempers and applications, combined with superior surface characteristics, makes it a preferred choice for industries ranging from automotive to appliances to general manufacturing. When project requirements demand material consistency, dimensional precision, and surface quality, cold-rolled 1020 delivers proven performance with manufacturing efficiency. -:- For detailed product information, please contact sales. -: AISI 1020 Steel, cold rolled Specification Dimensions Size： Diameter 20-1000 mm Length <4772 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 1020 Steel, cold rolled Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1020 Steel, cold rolled -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1020 Steel, cold rolled -:- For detailed product information, please contact sales. -:

Packing of AISI 1020 Steel, cold rolled -:- 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 1243 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