AISI 1020 Steel Flange

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: AISI 1020 Steel Flange, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: AISI 1020 Steel Flange, hot rolled, 19-32 mm (0.75-1.25 in) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 1020 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Product Information -:- For detailed product information, please contact sales. -: # **Product Specification: AISI 1020 Low Carbon Steel, Hot-Rolled Round Bar** ## **Product Identification** * **Standard Designation:** AISI 1020 / SAE 1020 * **UNS Number:** G10200 * **Condition:** Hot-Rolled (As-Rolled) * **Product Form:** Round Bar * **Size Range:** 19 mm to 32 mm (0.75 inch to 1.25 inch) diameter * **Surface:** Characteristic blue-black mill scale * **Key Feature:** Balanced carbon content offering optimal combination of strength, machinability, and weldability ## **Overview** AISI 1020 hot-rolled round bar represents one of the most versatile and widely used low-carbon steels in the manufacturing industry. With a carbon content of 0.18-0.23%, this grade strikes an ideal balance between strength and ductility. In the 19-32 mm diameter range, it provides consistent mechanical properties throughout the cross-section, making it suitable for a broad range of machining, forging, and fabrication applications. The hot-rolling process ensures good material integrity while the characteristic mill scale surface provides natural corrosion protection during storage and handling. This product serves as a fundamental building block for countless mechanical components across multiple industries. --- ## **1. Chemical Composition (Weight %, AISI/SAE Standard)** | Element | Content (%) | Metallurgical Significance | |---------|-------------|----------------------------| | **Carbon (C)** | 0.18 - 0.23 | Optimal balance for strength and formability | | **Manganese (Mn)** | 0.30 - 0.60 | Standard range for low-carbon steels | | **Phosphorus (P)** | ≤ 0.040 | Impurity control for improved cold workability | | **Sulfur (S)** | ≤ 0.050 | Standard impurity level | | **Silicon (Si)** | 0.15-0.35 (typical) | Deoxidizer (varies by deoxidation practice) | | **Iron (Fe)** | Balance | Matrix element | **Grade Positioning:** - **vs. 1018:** Slightly higher carbon (0.18-0.23% vs. 0.15-0.20%) - **vs. 1015:** Significantly stronger, slightly less formable - **vs. 1022:** Lower carbon, better weldability - **Carbon Equivalent (CE):** ~0.35-0.40 (excellent weldability) --- ## **2. Physical & Mechanical Properties** ### **A. Physical Properties (Hot-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:** ~56.5 W/m·K - **Coefficient of Thermal Expansion:** 11.7 × 10⁻⁶ /K (20-100°C) - **Magnetic Properties:** Strongly ferromagnetic - **Specific Heat Capacity:** ~475 J/kg·K ### **B. Mechanical Properties (Typical, As-Hot-Rolled - 25 mm Round)** | Property | Value Range | Industry Standard | |----------|-------------|-------------------| | **Yield Strength (0.2% offset)** | 350 - 425 MPa (51 - 62 ksi) | ASTM A29 typical | | **Tensile Strength** | 450 - 550 MPa (65 - 80 ksi) | Consistent performance | | **Elongation (50 mm)** | 20% - 30% | Excellent ductility | | **Hardness (Brinell)** | 135 - 180 HB | Machine-friendly range | | **Reduction of Area** | 40% - 50% | Good formability indicator | | **Impact Toughness (Charpy V)** | 30 - 65 J at 20°C | Adequate for most applications | | **Machinability Rating** | 65% of 1212 steel | Good for carbon steel | ### **C. Section-Specific Properties (19-32 mm Range)** | Diameter | Typical Yield Strength | Hardness Variation | Through-Section Uniformity | |----------|-----------------------|-------------------|----------------------------| | **19 mm (0.75")** | 375-425 MPa | ±10 HB | Excellent | | **25 mm (1.0")** | 360-410 MPa | ±15 HB | Very good | | **32 mm (1.25")** | 350-400 MPa | ±20 HB | Good | --- ## **3. Product Applications** ### **Automotive & Transportation** - **Chassis Components:** Brackets, mounts, structural reinforcements - **Suspension Parts:** Linkage components, control arm bushings - **Steering Components:** Tie rod ends, drag links (machined) - **Engine Components:** Mounting brackets, accessory brackets - **Fastener Stock:** Grade 5.8 equivalent bolts and studs ### **General Manufacturing & Machinery** - **Shafts & Axles:** Light to medium duty power transmission shafts - **Gears & Sprockets:** After heat treatment or as-forged blanks - **Machine Components:** Bushings, spacers, collars, washers - **Tooling Components:** Jigs, fixtures, workholding devices - **Agricultural Equipment:** Implement parts, linkage components ### **Construction & Infrastructure** - **Structural Members:** Non-critical structural supports - **Fastener Stock:** Anchor bolts, construction fasteners - **Hardware Components:** Hinges, brackets, mounting plates - **Formwork Components:** Reusable concrete form parts ### **Specialized Applications** - **Forging Stock:** Excellent hot workability for forged parts - **Case Hardening Substrate:** Ideal for carburized components - **Welded Fabrications:** Structural frames and assemblies - **Machined Parts:** High-volume screw machine components --- ## **4. International Standards & Equivalents** ### **Direct Chemical Equivalents** | Standard System | Designation | C (%) | Mn (%) | Standard Reference | |-----------------|-------------|-------|--------|-------------------| | **AISI/SAE (USA)** | **1020** | 0.18-0.23 | 0.30-0.60 | SAE J403 | | **UNS (USA)** | **G10200** | 0.18-0.23 | 0.30-0.60 | ASTM A29 | | **DIN (Germany)** | **1.0402** (C22) | 0.17-0.24 | 0.40-0.70 | DIN 17210 | | **EN (Europe)** | **C22E** | 0.17-0.24 | 0.40-0.70 | EN 10083-2 | | **JIS (Japan)** | **S20C** | 0.18-0.23 | 0.30-0.60 | JIS G4051 | | **GB (China)** | **20** | 0.17-0.24 | 0.35-0.65 | GB/T 699 | | **ISO** | **C22E4** | 0.17-0.24 | 0.40-0.70 | ISO 683-1 | ### **Functional Equivalents** | Standard | Grade | Yield Strength | Application Context | |----------|-------|---------------|-------------------| | **ASTM A36** | Structural | 250 MPa min | General structural | | **EN 10025-2** | S235JR | 235 MPa min | Structural purposes | | **JIS G3101** | SS400 | 245 MPa min | General structural | | **ASTM A575** | Merchant Quality | Commercial | General fabrication | --- ## **5. Processing Characteristics** ### **Machinability & Forming** 1. **Machinability Index:** 65% of 1212 steel (reference) 2. **Recommended Cutting Speeds:** - HSS tools: 25-40 m/min - Carbide tools: 80-120 m/min 3. **Chip Formation:** Good breaking characteristics 4. **Surface Finish:** Good with proper tooling (after scale removal) ### **Heat Treatment Capabilities** - **Annealing:** 790-845°C (1450-1550°F) for maximum softness - **Normalizing:** 870-925°C (1600-1700°F) for grain refinement - **Carburizing:** Excellent response - case hardness 58-63 HRC achievable - **Through-Hardening:** Limited by low carbon content - **Forging Temperature:** 1150-900°C (2100-1650°F) ### **Welding Characteristics** - **Weldability:** Excellent (CE ~0.35-0.40) - **Preheat Required:** None for thickness <25 mm - **Recommended Processes:** SMAW, GMAW, GTAW, SAW - **Filler Metals:** E70XX series (AWS), ER70S-X (GMAW) ### **Surface Preparation** - **Mill Scale Removal:** Required for most applications - **Methods:** Abrasive blasting, pickling, turning - **Surface Roughness (as-rolled):** 12.5-25 μm Ra - **Decarburization:** Typically <0.3 mm depth --- ## **6. Quality Specifications** ### **Standard Compliance** - **Dimensional Tolerances:** ASTM A29 Table 7 (Hot-Rolled Rounds) - **Straightness:** Standard mill practice (±1.5 mm/m typical) - **Surface Quality:** Free of harmful defects per ASTM A6/A6M - **Chemistry Verification:** Heat analysis per ASTM A751 ### **Testing Requirements** | Test | Standard | Frequency | Typical Requirements | |------|----------|-----------|---------------------| | **Chemical Analysis** | ASTM A751 | Per heat | Within specified ranges | | **Tensile Test** | ASTM A370 | Per heat/lot | Min. 450 MPa tensile | | **Bend Test** | ASTM E190 | Optional | 180° around 2t radius | | **Hardness Test** | ASTM E10 | Optional | 135-180 HB range | --- ## **7. Technical Comparison** ### **vs. AISI 1018** | Parameter | 1020 Advantage | Notes | |-----------|----------------|-------| | **Yield Strength** | 5-10% higher | Carbon content effect | | **Tensile Strength** | 5-8% higher | Consistent improvement | | **Case Hardening** | Slightly better | More carbon available | | **Machinability** | Comparable | Similar rating | | **Cost Difference** | Minimal | 2-5% typically | ### **vs. AISI 1015** | Parameter | 1020 Advantage | Magnitude | |-----------|----------------|-----------| | **Yield Strength** | Significantly higher | 15-20% increase | | **Tensile Strength** | Noticeably higher | 10-15% increase | | **Hardness** | Higher | 10-15 HB points | | **Applications** | More versatile | Wider strength range | ### **Performance Summary** 1. **Strength-to-Cost Ratio:** Excellent 2. **Manufacturing Flexibility:** Superior 3. **Heat Treatment Response:** Very good for case hardening 4. **Weldability:** Excellent 5. **Global Availability:** Extensive --- ## **8. Economic & Supply Considerations** ### **Cost Structure** | Component | Percentage | Notes | |-----------|------------|-------| | **Base Material** | 85-90% | Hot-rolled commodity | | **Processing** | 5-10% | Cutting, testing, etc. | | **Certification** | 2-5% | Testing and documentation | | **Profit Margin** | 3-8% | Industry standard | ### **Supply Chain Factors** - **Lead Times:** 2-4 weeks standard - **Minimum Orders:** 500-1000 kg typical - **Stock Availability:** Excellent in 19-32 mm range - **Global Sources:** Multiple producers worldwide ### **Total Cost Analysis** 1. **Material Utilization:** Good for machining/forging 2. **Processing Costs:** Standard carbon steel rates 3. **Tooling Costs:** No special requirements 4. **Performance Benefits:** Reliable and predictable --- ## **9. Design & Engineering Guidelines** ### **Optimal Applications** - **Strength Range:** 350-425 MPa yield strength - **Hardness Requirements:** 135-180 HB typical - **Weldability Needs:** Excellent joining characteristics - **Formability:** Good for bending and forging ### **Design Considerations** 1. **Section Size:** 19-32 mm optimal for properties 2. **Surface Condition:** Plan for scale removal 3. **Heat Treatment:** Consider for enhanced properties 4. **Corrosion Protection:** Required for exterior use ### **Limitations** - **Maximum Hardness:** Limited by carbon content - **Wear Resistance:** Requires surface treatment - **Temperature Service:** <400°C continuous - **Fatigue Limits:** Moderate compared to alloys --- ## **10. Packaging & Delivery** ### **Standard Specifications** - **Lengths:** 3-6 meters (10-20 feet) standard - **Bundling:** 1-3 tons per bundle, steel strapped - **Identification:** Color-coded ends or tags - **Surface Protection:** Mill dry (scale provides protection) - **Marking:** Heat number, grade, size stenciled ### **Custom Options** - **Cut Lengths:** Precision cut to specification - **Special Straightness:** Available for machining - **Testing Services:** Additional certification available - **Protective Coatings:** Oiled or painted if required ### **Storage & Handling** - **Storage Conditions:** Dry, covered preferred - **Stacking:** Limit height to prevent bending - **Handling Equipment:** Standard lifting gear suitable - **Shelf Life:** Essentially unlimited if protected --- ## **Summary** **AISI 1020 hot-rolled round bar (19-32 mm) represents the quintessential workhorse material in low-carbon steel manufacturing, offering an optimal balance of strength, machinability, and weldability.** With its carefully balanced carbon content of 0.18-0.23%, this grade delivers reliable performance across a wide spectrum of industrial applications while maintaining excellent processing characteristics. **Key Performance Attributes:** 1. **Balanced Properties:** Optimal strength-to-ductility ratio 2. **Excellent Weldability:** Carbon equivalent ~0.35-0.40 3. **Good Machinability:** 65% of free-machining steel rating 4. **Heat Treatment Response:** Excellent for case hardening **Technical Value Proposition:** - **Consistent Performance:** Predictable mechanical properties - **Processing Flexibility:** Suitable for machining, forging, welding - **Cost Effectiveness:** Excellent value for performance delivered - **Global Standardization:** Widely recognized and available **Ideal Application Scenarios:** - General-purpose shafts and axles in 19-32 mm range - Machined components requiring consistent material properties - Welded fabrications needing good strength and weldability - Forged parts where hot workability is important - Case-hardened components requiring tough core properties **Market Position:** AISI 1020 occupies a central position in the low-carbon steel family, serving as a reliable, cost-effective choice for countless mechanical applications. Its availability in the practical 19-32 mm diameter range makes it particularly suitable for medium-duty components across automotive, machinery, and general manufacturing sectors. **Global Standardization:** With direct equivalents including **EN C22E (1.0402)**, **JIS S20C**, and **GB 20**, this grade offers consistent quality and performance expectations worldwide. This standardization ensures reliable supply chain access and predictable material behavior. **Selection Guidance:** 1. **Choose 1020 over 1015/1018 when:** Higher strength is needed 2. **Choose 1020 over 1022/1025 when:** Better weldability is important 3. **Consider 1020 for:** Applications requiring case hardening 4. **Evaluate 1020 against:** Alloy steels for cost-sensitive projects **Final Recommendation:** AISI 1020 hot-rolled round bar represents an intelligent default choice for engineers and designers working with low-carbon steels. Its balanced chemistry, reliable properties, and excellent processing characteristics make it suitable for a vast array of applications. When project requirements call for a material that offers good strength, excellent weldability, and predictable machining behavior - all at a reasonable cost - 1020 delivers proven performance with minimal risk. For components in the 19-32 mm diameter range, it provides an optimal combination of section size suitability and material performance that has stood the test of time in industrial applications worldwide. -:- For detailed product information, please contact sales. -: AISI 1020 Steel, hot rolled, 19-32 mm (0.75-1.25 in) round Specification Dimensions Size： Diameter 20-1000 mm Length <4773 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, hot rolled, 19-32 mm (0.75-1.25 in) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1020 Steel Flange, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1020 Steel Flange, hot rolled, 19-32 mm (0.75-1.25 in) round -:- For detailed product information, please contact sales. -:

Packing of AISI 1020 Steel Flange, hot rolled, 19-32 mm (0.75-1.25 in) round -:- 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 Flange 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 1244 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