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."
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AISI 1522 Steel Flange Composition Spec (UNS G15220) Product Information
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AISI 1522 Steel Flange Composition Spec (UNS G15220) Synonyms
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AISI 1522 Steel Composition Spec (UNS G15220) Product Information
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### **Product Introduction: AISI 1522 Steel Composition Specification (UNS G15220)**
**Overview**
AISI 1522 (UNS G15220) is a standardized **medium-carbon, high-manganese steel** defined by its chemical composition. As a member of the "15xx" series, its hallmark is a significantly elevated manganese content (typically 1.10-1.40%), classifying it as a **manganese alloy steel**. This specific grade features a carbon content balanced for enhanced strength and hardenability while maintaining reasonable formability. The combination of carbon and manganese provides improved mechanical properties and heat treatability over comparable plain carbon steels like 1022 or 1035, making it a versatile, cost-effective engineering steel for applications requiring good strength, toughness, and wear resistance.
**Key Features & Characteristics**
* **Enhanced Hardenability & Strength:** The elevated manganese content substantially increases the steel's ability to be through-hardened (quenched and tempered), allowing for the development of uniform strength and hardness in larger cross-sections than is possible with plain carbon steels of similar carbon content.
* **Good Toughness & Wear Resistance:** When properly heat treated, it offers a favorable balance of tensile strength and impact resistance, along with improved resistance to abrasion compared to lower alloy grades.
* **Good Forgeability and Weldability (with precautions):** Suitable for hot forging operations and can be welded using appropriate procedures (preheat, low-hydrogen electrodes, controlled cooling).
* **Economic Performance Steel:** Provides a more economical alternative to chromium-molybdenum alloy steels for many applications where superior hardenability and moderate strength are primary requirements.
* **Versatile Processing:** Commonly supplied in hot-rolled, cold-drawn, or heat-treated conditions, adaptable to various manufacturing processes.
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### **1. Chemical Composition (Standard Conformance)**
| Element | Standard Range (%) | Key Function |
| :--- | :--- | :--- |
| **Carbon (C)** | 0.18 – 0.23 | Provides core strength and hardenability. This medium-low carbon range ensures good weldability and toughness while allowing effective strengthening via heat treatment. |
| **Manganese (Mn)** | 1.10 – 1.40 | **Primary Alloying Element.** Significantly enhances hardenability, allowing deeper penetration of hardness during quenching. Also contributes to solid solution strengthening. |
| **Phosphorus (P)** | ≤ 0.040 (max) | Residual element, kept low to maintain good toughness, particularly in transverse directions. |
| **Sulfur (S)** | ≤ 0.050 (max) | Residual element, kept low. **This is not a free-machining grade.** Ensures better ductility and weldability. |
| **Silicon (Si)** | 0.15 – 0.35 | Acts as a deoxidizer during steelmaking; contributes to strength. |
| **Iron (Fe)** | Balance | Base element. |
**Key International Standard Equivalents:**
* **UNS:** G15220
* **AISI/SAE:** 1522
* **ASTM:** A29 (Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought and Cold-Finished)
* **ASTM:** A519 (for mechanical tubing)
* **DIN (Germany):** ~1.1150 / C22 (approximate, but with much lower Mn)
* **EN (Europe):** No direct equivalent. Similar in concept to a higher-manganese variant of 1.1151 (C22E).
* **JIS (Japan):** No direct equivalent.
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### **2. Typical Physical & Mechanical Properties (Condition Dependent)**
*Properties vary significantly based on final processing. The values below are typical ranges.*
| Property / Condition | Hot-Rolled (As-Rolled) | Normalized | Quenched & Tempered (Example) |
| :--- | :--- | :--- | :--- |
| **Density** | 7.85 g/cm³ | 7.85 g/cm³ | 7.85 g/cm³ |
| **Tensile Strength** | 500 – 650 MPa | 550 – 700 MPa | 900 – 1200 MPa |
| **Yield Strength (0.2% Offset)** | 320 – 450 MPa | 350 – 500 MPa | 750 – 1050 MPa |
| **Elongation (in 50mm)** | 20% – 28% | 18% – 25% | 10% – 16% |
| **Brinell Hardness (HB)** | 160 – 210 | 170 – 220 | 300 – 400 (HRC 32-42) |
| **Machinability (As-Rolled/Norm)** | Fair (~55% of 1212) | Fair | Poor |
| **Impact Toughness** | Good | Good | Good (with proper tempering) |
| **Hardenability** | Medium-High. Suitable for through-hardening of moderate to moderately large sections. | | |
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### **3. Product Applications**
AISI 1522 is selected for components that require a combination of good strength, toughness, and response to heat treatment, often replacing 1020 or 1035 where higher performance is needed.
* **Forged Components:** Connecting rods, lever arms, yoke arms, and other forged parts requiring good hot workability and subsequent heat treatment.
* **Shafts and Axles:** Drive shafts, axle shafts, and general power transmission shafts that benefit from through-hardening for increased fatigue strength.
* **Gears and Sprockets:** Medium-duty gears, pinions, and sprockets that are either through-hardened or case-hardened.
* **High-Strength Fasteners:** Bolts, studs, and pins where higher core strength than Grade 5 or similar is required.
* **Agricultural and Construction Equipment:** Pivot pins, bucket teeth adapters, and linkage components subject to impact and wear.
* **General Machinery and Automotive Parts:** Brackets, hydraulic components, and other stressed parts requiring reliable performance.
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### **4. Important Distinctions & Considerations**
* **Not a Free-Machining Steel:** Contains low sulfur and phosphorus. Machinability is lower than resulfurized grades (11xx, 12xx series). Machining is typically performed in the normalized or annealed condition with appropriate tooling.
* **Heat Treatment is Standard:** This grade is often specified with a required heat treatment (e.g., "1522, Normalized" or "1522, Q&T to HRC 28-35") for its final application. It responds well to both through-hardening and carburizing.
* **Comparison to 10xx Series (e.g., 1022/1035):** AISI 1522 offers significantly better hardenability and strength at similar carbon levels due to its higher manganese. It achieves higher strength in thicker sections with less severe quenching.
* **Comparison to 41xx Series (e.g., 4140):** Has lower hardenability and strength potential than chromium-molybdenum steels like 4140, but offers better machinability in the annealed state and is more economical. 1522 is a suitable choice where the premium properties of Cr-Mo steel are not fully required.
* **Weldability:** Can be welded with proper procedures. Preheating (150-260°C / 300-500°F) is recommended for thick sections or high restraint to avoid hydrogen-induced cracking in the heat-affected zone (HAZ). Post-weld heat treatment may be beneficial.
* **"H" Grade Availability:** An **AISI 1522H** grade exists for applications requiring guaranteed hardenability bands, providing predictable heat treatment response for critical components.
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**Disclaimer:** The information provided is based on standard industry specifications for reference. Actual properties, performance, and processability depend on specific manufacturing methods, heat treatment cycles, and final part geometry. For engineering applications, always consult the certified material test report and relevant application standards.
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AISI 1522 Steel Composition Spec (UNS G15220) Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5032 mm
Size:We can customized as required
Standard：
Per your request or drawing
We can customized as required
Properties（Theoretical）
Chemical Composition
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AISI 1522 Steel Composition Spec (UNS G15220) Properties
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Applications of AISI 1522 Steel Flange Composition Spec (UNS G15220)
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Chemical Identifiers AISI 1522 Steel Flange Composition Spec (UNS G15220)
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Packing of AISI 1522 Steel Flange Composition Spec (UNS G15220)
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Standard Packing:
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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 1503 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
