AISI 1015 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 1015 Steel Flange, mock carburized at 915°C (1680°F) for 8 hours, 775°C (1430°F) reheat, water quenched, Product Information -:- For detailed product information, please contact sales. -: AISI 1015 Steel Flange, mock carburized at 915°C (1680°F) for 8 hours, 775°C (1430°F) reheat, water quenched, Synonyms -:- For detailed product information, please contact sales. -:

AISI 1015 Steel, mock carburized at 915°C (1680°F) for 8 hours, 775°C (1430°F) reheat, water quenched, Product Information -:- For detailed product information, please contact sales. -: ## **Product Specification: AISI 1015 Low Carbon Steel, Simulated Core-Condition Test Specimen** ### **Product Designation** * **Standard Name:** AISI 1015 * **UNS Number:** G10150 * **Condition:** **Mock (or Pseudocarburized) & Heat Treated** * **Thermal Cycle:** 1. **Mock Carburize:** 915°C (1680°F) for 8 hours (inert atmosphere) 2. **Reheat:** 775°C (1430°F) 3. **Quench:** Water * **Key Feature:** A **specialized test material** representing the **worst-case core microstructure and properties** of a carburized AISI 1015 component. It simulates the grain growth and thermal history of the core without carbon addition, followed by a standard quench from an intercritical temperature. ### **Overview** This is **not a commercial product** but a **standardized test condition** used in materials engineering and quality assurance. The specified thermal process simulates the core of a part that has undergone a long carburizing cycle. The 8-hour soak at 915°C causes significant **austenite grain growth**. The subsequent reheat to 775°C (an intercritical temperature where ferrite and austenite coexist) refines the microstructure somewhat before a severe water quench produces a **brittle, high-strength martensitic core** with coarse prior austenite grains. This condition is used to evaluate the **inherent hardenability, core toughness, and grain growth tendency** of the steel in a controlled, repeatable manner, providing critical data for component design and failure analysis. --- ### **1. Chemical Composition (Typical % by Weight, AISI/SAE Standard)** The composition remains standard AISI 1015; the properties are dictated by the severe thermal cycle. | Element | Content (%) | Role & Effect in This Process | | :--- | :--- | :--- | | **Carbon (C)** | 0.13 - 0.18 | **Low core carbon.** Upon water quenching from 775°C, it forms a **low-carbon martensite** which is very hard but extremely brittle, with low impact resistance. This is the property of interest. | | **Manganese (Mn)** | 0.30 - 0.60 | Provides minimal hardenability in this lean alloy; the water quench is required to fully harden the core, indicating shallow hardenability. | | **Phosphorus (P)** | 0.040 max | Impurity. | | **Sulfur (S)** | 0.050 max | Impurity. | | **Iron (Fe)** | Balance | Forms the martensitic matrix. | **Microstructure:** **Coarse prior austenite grain boundaries** (from the 915°C soak) filled with a matrix of **low-carbon, plate martensite** (from the water quench). This structure has high hardness but **very poor toughness**. --- ### **2. Physical & Mechanical Properties (After Specified Thermal Cycle)** **A. Physical Properties (Estimated)** * **Density:** 7.87 g/cm³ * **Elastic Modulus (E):** ~200 GPa **B. Mechanical Properties (Typical & Indicative)** *These properties are for test comparison and are not design allowables for a real carburized part.* * **Core Hardness:** **45 - 55 HRC** (Very high for the low carbon content, due to full martensite from water quench). * **Ultimate Tensile Strength:** **1400 - 1650 MPa (203 - 239 ksi)** * **Yield Strength (0.2% Offset):** **1200 - 1450 MPa (174 - 210 ksi)** * **Elongation:** **< 5%** (Negligible ductility) * **Reduction of Area:** **< 10%** * **Impact Toughness (Charpy V-Notch):** **Extremely Low (5 - 15 J).** This is the **key measured parameter.** The combination of coarse grains and martensite results in severe embrittlement. * **Prior Austenite Grain Size:** Coarse, typically ASTM 0-3. Measured to assess grain growth resistance. --- ### **3. Product Applications & Purpose** This material condition exists solely for **testing, qualification, and research**. * **Material Lot Qualification:** Aerospace and automotive specifications (e.g., AMS, OEM standards) often require destructive testing of coupons processed through this or a similar "mock carburizing" cycle to certify a heat of steel before it can be used for critical gears or bearings. * **Core Property Database Generation:** Used to develop fundamental understanding of core fatigue strength, fracture toughness, and hardenability under simulated service thermal cycles. * **Grain Growth Studies:** The 8-hour soak at 915°C is a severe test of the steel's resistance to austenite grain growth, which is detrimental to toughness. * **Failure Analysis Benchmark:** Provides a baseline microstructure and property set for investigating field failures where core brittleness is suspected. * **Hardenability Testing (Jominy Correlation):** Serves as an extreme end-condition for correlating with end-quench hardenability data. --- ### **4. International Standards & Designations** | Standard System | Relevant Standard | Notes / Purpose | | :--- | :--- | :--- | | **SAE / AISI (USA)** | **SAE 1015** (Base Grade) | The test cycle is defined by the testing specification, not the material grade. | | **ASTM (USA)** | **ASTM A255 (Jominy Test), ASTM E112 (Grain Size), ASTM E23 (Impact Testing)** | The process creates specimens for testing under these standards. | | **AMS (Aerospace)** | **AMS 2300, AMS 2301, AMS 2759/3** | These premium aircraft steel specs frequently mandate **"melt-to-melt" testing** using pseudocarburizing cycles to verify grain size and core hardenability. | | **ISO** | **ISO 642:1999 (Steel — Hardenability test by end quenching)** | The mock carburizing test supplements Jominy data for specific applications. | | **Customer Specifications** | **Pratt & Whitney, GE, Airbus, Boeing** etc. | Major OEMs have proprietary versions of this test for their supply chain. | --- ### **Technical Significance of the Thermal Cycle** 1. **Mock Carburize (915°C for 8h):** Simulates the **time-at-temperature** of a deep case carburizing process. In an inert atmosphere, it causes **grain coarsening** and thermal conditioning without altering surface chemistry. This is the "worst-case" thermal exposure for the core. 2. **Reheat to 775°C:** This is an **intercritical reheat**. It partially refines the coarse austenite grains by starting the transformation to ferrite + austenite. It sets a consistent temperature for the final quench. 3. **Water Quench:** The most severe common quenchant. It is used to **ensure full martensite transformation in the core**, revealing the steel's maximum achievable core hardness and minimum toughness for this carbon content. It tests the **limiting hardenability**. 4. **Purpose:** To **isolate and test the core properties** independent of the case. A real carburized part has a carbon gradient; this test creates a uniform, low-carbon, fully hardened specimen to measure baseline core performance. ### **Summary** **AISI 1015 processed through the "mock carburize, reheat, water quench" cycle is a controlled metallurgical artifact for quality assurance and research.** It represents the **theoretical lower limit of core toughness** after a severe carburizing process. This condition is fundamental to high-reliability industries for qualifying material, predicting core-driven failure modes (like bending fatigue), and setting manufacturing specifications. It underscores the critical importance of **grain size control and core hardenability** in carburizing steels, even for a common grade like 1015. The data derived from specimens in this state directly informs the safe design and life prediction of critical power transmission components. -:- For detailed product information, please contact sales. -: AISI 1015 Steel, mock carburized at 915°C (1680°F) for 8 hours, 775°C (1430°F) reheat, water quenched, Specification Dimensions Size： Diameter 20-1000 mm Length <4762 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 1015 Steel, mock carburized at 915°C (1680°F) for 8 hours, 775°C (1430°F) reheat, water quenched, Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1015 Steel Flange, mock carburized at 915°C (1680°F) for 8 hours, 775°C (1430°F) reheat, water quenched, -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1015 Steel Flange, mock carburized at 915°C (1680°F) for 8 hours, 775°C (1430°F) reheat, water quenched, -:- For detailed product information, please contact sales. -:

Packing of AISI 1015 Steel Flange, mock carburized at 915°C (1680°F) for 8 hours, 775°C (1430°F) reheat, water quenched, -:- 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 1233 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