AISI 5046H 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 5046H Steel Flange Product Information -:- For detailed product information, please contact sales. -: AISI 5046H Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

AISI 5046H Steel Product Information -:- For detailed product information, please contact sales. -: **Product Datasheet: AISI 5046H Chromium Alloy H-Steel** --- ## **1. Product Overview** AISI 5046H is a **medium-carbon chromium alloy steel supplied to specific hardenability requirements**, as indicated by the **"H" suffix**. This designation ensures the material meets defined bands of hardenability as per the end-quench (Jominy) test, guaranteeing **consistent and predictable through-hardening characteristics** in production. The steel provides a balanced combination of strength, toughness, and wear resistance after quenching and tempering, with the added assurance of uniform response to heat treatment across different manufacturing lots. It is a cost-effective choice for critical components where reliable core properties are essential. --- ## **2. Key International & Equivalent Standards** | Region/System | Standard Designation | Description | | :--- | :--- | :--- | | **USA (Primary)** | **SAE J404, J412, J770** | Standard designation: **AISI 5046H** | | **USA (Hardenability)** | **ASTM A304** | Standard Specification for Alloy Steel Bars Subject to End-Quench Hardenability Requirements | | **USA (Material)** | **ASTM A29/A29M** | Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought | | **Europe (Functional Similar)** | Similar concept to **46Cr2 with specified hardenability** | No direct "H" equivalent in EN; closest material is **1.7006** with supplementary requirements. | | **Japan (Similar)** | **SCr445H (JIS G4105)** | Designates chromium steel for machine structural use with hardenability bands. | **Core Principle:** The "H" designation shifts the primary acceptance criterion from strict chemistry to **guaranteed hardenability performance**. The steel must conform to a published Jominy curve band within the limits of ASTM A304. --- ## **3. Chemical Composition (Weight %)** *Typical ranges for hardenability control. Actual composition may vary to achieve the specified H-band.* | Element | Minimum | Maximum | Typical | Primary Function | | :--- | :--- | :--- | :--- | :--- | | **Carbon (C)** | 0.44 | 0.49 | 0.46 | Primary determinant of attainable hardness and strength. | | **Manganese (Mn)** | 0.70 | 0.90 | 0.80 | Enhances hardenability and strength. | | **Phosphorus (P)** | — | 0.035 | 0.020 | Residual impurity (controlled). | | **Sulfur (S)** | — | 0.040 | 0.025 | Improves machinability via MnS inclusions. | | **Silicon (Si)** | 0.15 | 0.35 | 0.25 | Deoxidizer, provides solid solution strengthening. | | **Chromium (Cr)** | 0.20 | 0.35 | 0.27 | Improves hardenability, wear resistance, and tempering stability. | | **Residuals (Ni, Mo, Cu)** | Report | Typically ≤ 0.35% each | | Minor influence. | **Critical Note:** For AISI 5046H, the permissible chemical composition range is intentionally wider than for standard 5046. The final chemistry for a given heat is optimized to ensure the Jominy test results fall within the specified hardenability band. --- ## **4. Hardenability & Mechanical Properties** ### **Guaranteed Hardenability (Per ASTM A304)** - The material is supplied to a specific **Hardenability Band** (e.g., H1, H2, etc.), which defines the allowable minimum and maximum hardness values at standard distances on the Jominy end-quench test specimen. - **Typical Jominy Curve Characteristic:** AISI 5046H exhibits moderate hardenability. A hardness of **40 HRC is typically maintained to a distance of approximately J10 to J15 (10-15 mm from the quenched end)** under standard test conditions. - This performance translates to reliable **through-hardening in oil for sections up to about 30-50 mm (1.2-2 inches) in diameter**, depending on the specific H-band and quenching conditions. ### **Mechanical Properties (After Quench & Temper)** *Properties are achieved after austenitizing at 830-860°C (1525-1580°F), oil quenching, and tempering. Values are typical for medium sections.* | Tempering Temperature | Tensile Strength | Yield Strength (0.2%) | Elongation (%) | Reduction of Area (%) | Typical Hardness (HRC) | | :--- | :--- | :--- | :--- | :--- | :--- | | **As-Quenched** | — | — | — | — | 55 - 60 (approx.) | | **200°C (400°F)** | 1550 - 1750 MPa | 1350 - 1550 MPa | 9 - 12 | 35 - 45 | 50 - 54 | | **425°C (800°F)** | 1150 - 1300 MPa | 1050 - 1200 MPa | 13 - 16 | 45 - 55 | 38 - 42 | | **540°C (1000°F)** | 950 - 1100 MPa | 850 - 1000 MPa | 16 - 20 | 50 - 60 | 30 - 34 | | **650°C (1200°F)** | 750 - 850 MPa | 650 - 750 MPa | 20 - 25 | 55 - 65 | 23 - 27 | ### **Physical Properties** - **Density:** 7.85 g/cm³ - **Modulus of Elasticity:** 205 GPa - **Poisson's Ratio:** 0.29 - **Machinability (Annealed):** Good (~65% of 1212 steel standard). --- ## **5. Heat Treatment Guidelines** | Process | Key Parameters | Objective / Notes | | :--- | :--- | :--- | | **Annealing** | 830-860°C (1525-1580°F), slow cool. | Soften for machining (~187-229 HB). | | **Normalizing** | 870-900°C (1600-1650°F), air cool. | Grain refinement. | | **Hardening** | Austenitize: 830-860°C (1525-1580°F). Quench: **Oil**. | Achieve full martensitic transformation in core. | | **Tempering** | **Immediate** temper after quench. 400-650°C (750-1200°F), 1-2 hrs/inch. | Relieve stresses, set final strength/toughness. | --- ## **6. Primary Applications** AISI 5046H is specified for **critical, heat-treated components** where consistent core properties and predictable manufacturing are paramount, particularly in automotive and heavy machinery sectors: - **Automotive:** Transmission gears, axle shafts, steering components (pitman arms, idler arms), crankshafts, and high-stress fasteners. - **Heavy Equipment:** Gears, drive shafts, sprockets, rollers, and pivot pins for agricultural and construction machinery. - **Industrial Components:** Pump shafts, spindle rods, couplings, and other machinery parts subjected to torsional and bending fatigue. - **Forgings:** High-integrity forged parts requiring uniform hardening and reliable impact resistance. --- ## **7. Key Advantages & Selection Rationale** - **Manufacturing Consistency:** The **H-band guarantee** ensures uniform hardenability from lot to lot, reducing heat treatment variability and scrap rates in high-volume production. - **Predictable Performance:** Design engineers can reliably predict the core hardness and strength profile across a part's cross-section, leading to more robust and optimized designs. - **Quality Assurance:** Mill certification includes actual Jominy hardenability data, providing verifiable proof of performance beyond simple chemistry. - **Cost-Effective Reliability:** Offers the assurance of a controlled-hardenability steel at a cost point between plain carbon steels and higher-alloy grades like 41xxH steels. --- ## **Important Processing & Design Considerations** - **Weldability:** **Poor.** Preheating (200-300°C / 400-570°F) and strict control using low-hydrogen processes are mandatory. Post-weld heat treatment (PWHT) is strongly recommended. - **Decarburization Prevention:** Use controlled atmosphere or protective coatings during heating for hardening to preserve surface carbon content and final hardness. - **Section Size Limitation:** For sections significantly larger than 50 mm, the guaranteed through-hardening may not be achieved; verification for the specific H-band and quenching severity is required. - **Notch Sensitivity:** In high-strength conditions, components are sensitive to surface defects and sharp radii. Proper finishing (grinding, shot peening) and generous fillets are crucial for fatigue-critical parts. --- **Disclaimer:** This datasheet provides characteristic data. For specification, **AISI 5046H must be ordered to ASTM A304 with a specified Hardenability Band**. Final properties depend on part geometry, quenching conditions, and tempering practice. Prototype testing under simulated service conditions is essential for critical applications. The manufacturer's processing guidelines and certified mill test reports should always govern production. -:- For detailed product information, please contact sales. -: AISI 5046H Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4098 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 5046H Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 5046H Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 5046H Steel Flange -:- For detailed product information, please contact sales. -:

Packing of AISI 5046H Steel Flange -:- 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 569 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