AISI 6150 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 6150 Steel Flange, annealed, 25 mm (1 in.) round Product Information -:- For detailed product information, please contact sales. -: AISI 6150 Steel Flange, annealed, 25 mm (1 in.) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 6150 Steel, annealed, 25 mm (1 in.) round Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: AISI 6150 Chromium-Vanadium Alloy Steel (Annealed Condition)** ### **Product Designation** * **Standard Name:** AISI 6150 / SAE 6150 * **UNS Number:** G61500 * **Condition:** **Annealed** (Spheroidize Annealed for optimal machinability) * **Product Form:** Hot-rolled or cold-finished steel bar * **Specified Size:** **25 mm (1 inch) diameter round** ### **Overview** AISI 6150 is a versatile, medium-carbon **chromium-vanadium alloy steel** renowned for its excellent combination of high strength, good toughness, and superior fatigue resistance. Supplied in the **annealed condition**, the material offers excellent machinability and formability prior to final heat treatment. It is primarily designed for **through-hardening** (quenching and tempering) to achieve a wide range of strength and hardness levels. The addition of vanadium provides crucial grain refinement, making it a preferred choice for high-stress, high-fatigue applications such as heavy-duty shafts, springs, and gear components. ### **1. Chemical Composition (Typical % by Weight, AISI/SAE Standard)** The composition is balanced for deep hardenability, strength, and enhanced toughness via grain refinement. | Element | Content (%) | Role & Effect in AISI 6150 | | :--- | :--- | :--- | | **Carbon (C)** | 0.48 - 0.53 | Provides the fundamental capacity for high strength and hardness through martensite formation. | | **Manganese (Mn)** | 0.70 - 0.90 | Increases hardenability, ensuring uniform properties in the 1-inch cross-section. | | **Phosphorus (P)** | ≤ 0.035 | Impurity; kept low to prevent embrittlement. | | **Sulfur (S)** | ≤ 0.040 | Impurity; standard low level ensures good ductility and fatigue properties. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer and solid solution strengthener. | | **Chromium (Cr)** | 0.80 - 1.10 | Significantly enhances hardenability, wear resistance, and provides good tempering resistance. | | **Vanadium (V)** | 0.15 (min) | **Critical addition.** A potent grain refiner that inhibits grain growth during austenitizing, resulting in a finer final microstructure that **improves toughness, impact strength, and fatigue life**. | | **Iron (Fe)** | Balance | | ### **2. Physical & Mechanical Properties (Annealed Condition - 25 mm round)** **A. Physical Properties** * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Elastic Modulus (Young's Modulus):** ~205 GPa (29.7 x 10⁶ psi) * **Poisson's Ratio:** 0.29 * **Thermal Conductivity:** ~47.0 W/m·K * **Coefficient of Thermal Expansion:** 11.3 x 10⁻⁶ /K (20-100°C) * **Forging Temperature Range:** 1050 - 900°C (1920 - 1650°F) **B. Mechanical Properties (As-Annealed)** *These are typical properties for a 25 mm (1 in.) round in a spheroidize-annealed state, ready for machining.* * **Hardness (Brinell):** 187 - 229 HB * **Hardness (Rockwell):** ~90 - 97 HRB * **Tensile Strength:** 620 - 795 MPa (90 - 115 ksi) * **Yield Strength (0.2% Offset):** 415 MPa (60 ksi) min. * **Elongation (in 50 mm / 2 in.):** 22% min. * **Reduction of Area:** 40% min. * **Machinability (Compared to 1.0% C steel):** ~65% **C. Achievable Properties After Heat Treatment** *For reference: Typical properties after oil quenching and tempering of a 25 mm round.* * **Surface Hardness (As-Quenched):** Up to 60-62 HRC * **Tempered Hardness Range:** 28 - 55 HRC (widely adjustable) * **Tensile Strength (e.g., tempered at 425°C / 800°F):** ~1550-1700 MPa (225-247 ksi) * **Key Attribute:** Excellent fatigue strength and good impact resistance at high strength levels due to fine grain structure. ### **3. Product Applications** AISI 6150 is selected for demanding applications requiring a reliable, high-performance steel that can be heat-treated to precise specifications. The **annealed 25 mm round** is a standard stock form for machining components such as: * **High-Stress Shafts & Axles:** Crankshafts, camshafts, axle shafts, propeller shafts, and spindle shafts. * **Gears & Pinions:** Heavy-duty gears, pinions, and drive components in automotive and industrial gearboxes. * **Springs:** **A premier application.** Used for heavy-duty coil springs, leaf springs (particularly for railway and off-highway vehicles), and torsion bars where high elastic limit and fatigue resistance are critical. * **Tools & Parts:** Wrenches, drill collars, mandrels, and machine parts subject to high fatigue and wear. * **Agricultural & Mining Equipment:** Gears, shafts, and other high-strength components. * **Aerospace:** Landing gear components, actuator parts, and other high-strength structural applications. ### **4. International Standards & Designations** AISI 6150 has well-established equivalents in major international standards. | Standard System | Designation | Notes / Key Comparison | | :--- | :--- | :--- | | **SAE / AISI (USA)** | **SAE/AISI 6150** | The standard designation. | | **UNS (USA)** | **G61500** | Unified Numbering System. | | **ASTM (USA)** | **ASTM A322** (Grade 6150) | Standard for alloy steel bars. **ASTM A29** for general bar requirements. | | **DIN / EN (Germany/EU)** | **1.8159 (50CrV4)** | The direct and most common European equivalent, especially for spring applications. | | **BS (UK)** | **735A50 / 535A99** | Specification for chromium-vanadium steel. | | **JIS (Japan)** | **SUP10** | Japanese spring steel specification. A very close equivalent. | | **GB (China)** | **50CrVA (GB/T 3077)** | Nearly identical Chinese specification for spring and high-strength steel. | | **ISO** | **ISO 683-11: Type 9** | Falls under alloy steels for quenching and tempering. | ### **Processing & Heat Treatment Guidance (for 25 mm round)** 1. **Annealing (As-Supplied):** Full anneal at ~790-815°C (1450-1500°F), slow furnace cool. 2. **Machining:** Optimally performed in the soft, spheroidize-annealed condition (~190-220 HB). 3. **Hardening:** Austenitize at 830-860°C (1525-1580°F), **oil quench**. Adequate agitation is required for full through-hardening of a 1-inch round. 4. **Tempering:** **Mandatory immediately after quenching.** Temper between 205-650°C (400-1200°F) to achieve desired hardness and relieve stresses. For spring applications, tempering in the 425-480°C (800-900°F) range is common. ### **Summary** The **AISI 6150 steel in annealed 25 mm (1 in.) round** is a premium, readily machinable stock form of a high-performance alloy steel. Its chemical composition, led by chromium for hardenability and vanadium for toughness, is engineered for critical components. This product allows manufacturers to machine complex parts in a soft state and then apply a robust through-hardening heat treatment to achieve an exceptional balance of high strength, fatigue resistance, and impact toughness, making it a first-choice material for demanding automotive, industrial, and spring applications worldwide. -:- For detailed product information, please contact sales. -: AISI 6150 Steel, annealed, 25 mm (1 in.) round Specification Dimensions Size： Diameter 20-1000 mm Length <4138 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 6150 Steel, annealed, 25 mm (1 in.) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 6150 Steel Flange, annealed, 25 mm (1 in.) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 6150 Steel Flange, annealed, 25 mm (1 in.) round -:- For detailed product information, please contact sales. -:

Packing of AISI 6150 Steel Flange, annealed, 25 mm (1 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 609 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