AISI M1020 Merchant Quality Carbon 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 M1020 Merchant Quality Carbon Steel Flange, Composition Spec Product Information -:- For detailed product information, please contact sales. -: AISI M1020 Merchant Quality Carbon Steel Flange, Composition Spec Synonyms -:- For detailed product information, please contact sales. -:

AISI M1020 Merchant Quality Carbon Steel, Composition Spec Product Information -:- For detailed product information, please contact sales. -: # **Product Specification: AISI M1020 Merchant Quality Carbon Steel** --- ## **1. Product Overview** AISI M1020, designated as **"Merchant Quality"** steel, is a versatile and economically optimized low-carbon steel grade. The "M" prefix and "Merchant Quality" classification signify that this material is produced to **standard commercial quality** with a primary focus on consistent formability and weldability, rather than guaranteed, stringent mechanical properties. It is a cost-effective solution for a wide range of general fabrication, construction, and light structural applications where high strength is not the primary design criterion. The chemical composition is tailored to ensure reliable performance in common manufacturing processes such as bending, cutting, and welding. ## **2. Key Features & Definition of "Merchant Quality"** * **Commercial Focus:** Emphasizes manufacturability and cost-efficiency over guaranteed minimum tensile/yield strengths. Mechanical properties are typically "as-rolled" and can vary. * **Excellent Formability:** The controlled carbon and manganese content provides good ductility for cold bending, rolling, and moderate forming operations. * **Superior Weldability:** Low carbon equivalent ensures excellent weldability using all common methods without pre- or post-heat treatment under normal conditions. * **Predictable Machinability:** Offers consistent and good machinability for drilling, punching, and shearing. * **Economic Advantage:** Typically offered at a lower cost than "Structural Quality" or "Special Quality" grades (e.g., ASTM A36, AISI 1020 Special Quality) due to less restrictive property guarantees. ## **3. Standard Chemical Composition (Weight %)** The composition is the primary controlled specification for Merchant Quality steel. | Element | AISI M1020 Specification (Typical) | Notes | | :--------------- | :--------------------------------- | :---- | | **Carbon (C)** | 0.18 - 0.23 | Balances formability and strength. | | **Manganese (Mn)**| 0.30 - 0.60 | Aids in deoxidation and provides modest solid solution strengthening. | | **Phosphorus (P)**| ≤ 0.040 | Residual element; controlled to maintain ductility. | | **Sulfur (S)** | ≤ 0.050 | Residual element; affects machinability and weldability. | | **Iron (Fe)** | Balance | - | *Note: Unlike "Special Quality" steels, residual elements like copper, nickel, chromium, etc., may not be as strictly controlled unless specified for enhanced corrosion resistance.* ## **4. Typical "As-Rolled" Mechanical Properties** *Properties are indicative and represent common ranges for hot-rolled merchant products. They are not guaranteed minima.* | Property | Approximate Range (Metric) | Approximate Range (Imperial) | Condition | | :--------------------------------- | :------------------------- | :--------------------------- | :-------- | | **Tensile Strength** | 380 - 450 MPa | 55,000 - 65,000 psi | As-Hot Rolled | | **Yield Strength (0.2% Offset)** | 205 - 310 MPa | 30,000 - 45,000 psi | As-Hot Rolled | | **Elongation in 50 mm (2 in)** | 20% - 30% | 20% - 30% | As-Hot Rolled | | **Hardness** | 110 - 145 HB | 110 - 145 HB | As-Hot Rolled | **Physical Properties:** * Density: ~7.87 g/cm³ (0.284 lb/in³) * Modulus of Elasticity: ~200 GPa (29,000 ksi) ## **5. Primary Applications** This grade is ubiquitous in general manufacturing and light construction due to its balance of performance and cost. * **Light Structural Framing:** Purlins, girts, studs, and light load-bearing frames in non-code or lightly loaded structures. * **Sheet Metal Fabrication:** Ductwork, electrical enclosures, panels, and cabinets. * **General Fabrication:** Brackets, supports, braces, frames for machinery guards, and non-critical components. * **Piping & Conduit:** For low-pressure fluid transfer and electrical raceway applications. * **Automotive Non-Structural Parts:** Mounting brackets, supports, and interior structural components. * **Hardware & Agricultural Equipment:** Hinges, straps, and components for light-duty implements. ## **6. Relevant International Standards & Specifications** Merchant Quality steel is governed by standards that define its commercial form and chemical limits. * **AISI (USA):** **AISI M1020** (The defining standard for merchant quality composition). * **ASTM (USA):** **ASTM A283/A283M** (Standard Specification for Low and Intermediate Tensile Strength Carbon Steel Plates - often supplied as Merchant Quality). May also be supplied under **ASTM A36** but without the full mechanical property guarantee. * **SAE (USA):** **SAE J403** covers chemical compositions for carbon steels, including merchant quality. * **CSA (Canada):** **G40.21 38W / 44W** (Similar commercial quality structural steel). * **General:** Often referred to as "Commercial Quality" or "CQ" steel in industry parlance. ## **7. Fabrication & Processing Notes** * **Forming:** Excellent for cold bending and rolling. Sharp bends may require attention to minimum bend radii relative to thickness. * **Welding:** **Excellent weldability.** All standard processes (SMAW, GMAW, GTAW, FCAW) are suitable. No preheat is typically required for sections under 1 inch (25 mm). * **Machining:** Good machinability. The as-rolled surface scale is abrasive; descaling (shot blasting, pickling) before precision machining is recommended. * **Surface Finish:** Supplied with a hot-rolled mill scale. For painting, thorough surface cleaning and priming are required. * **Limitation:** Not suitable for primary, code-governed structural members in buildings, bridges, or pressure vessels without supplemental testing and certification to a specific structural standard (e.g., ASTM A36). ## **8. Availability & Ordering** * **Forms:** Widely available in common merchant forms: **Round Bars**, Square Bars, Flat Bars, Angles, Channels, Beams, Plates, and Sheets. * **Condition:** Typically supplied **As-Hot Rolled (HR)**. * **Ordering Clarification:** It is critical to specify **"AISI M1020 Merchant Quality"** and confirm whether the order is for chemical composition only or if any supplementary property requirements are needed. --- **Disclaimer:** AISI M1020 Merchant Quality steel is sold primarily to a chemical composition specification. Mechanical properties are not guaranteed unless explicitly stated in the purchase order by reference to an additional standard (e.g., "to meet ASTM A283 Grade C"). The material is intended for general fabrication and non-critical applications. The user is solely responsible for evaluating the suitability of the material's typical properties for the intended application, including all design, safety, and regulatory compliance factors. For critical structural applications, specify a steel grade with guaranteed mechanical properties such as ASTM A36 or ASTM A572. -:- For detailed product information, please contact sales. -: AISI M1020 Merchant Quality Carbon Steel, Composition Spec Specification Dimensions Size： Diameter 20-1000 mm Length <5455 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 M1020 Merchant Quality Carbon Steel, Composition Spec Properties -:- For detailed product information, please contact sales. -:

Applications of AISI M1020 Merchant Quality Carbon Steel Flange, Composition Spec -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI M1020 Merchant Quality Carbon Steel Flange, Composition Spec -:- For detailed product information, please contact sales. -:

Packing of AISI M1020 Merchant Quality Carbon Steel Flange, Composition Spec -:- 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 1926 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