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 1524 Steel Flange, Cold Drawn Bar (UNS G15240) Product Information
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AISI 1524 Steel Flange, Cold Drawn Bar (UNS G15240) Synonyms
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AISI 1524 Steel, Cold Drawn Bar (UNS G15240) Product Information
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### **Product Introduction: AISI 1524 / UNS G15240 Cold Drawn Steel Bar**
**Overview**
AISI 1524 (UNS G15240) is a high-manganese, medium-low carbon alloy steel supplied in the precision **cold drawn bar** condition. This process transforms hot-rolled stock by drawing it through a die at room temperature, imparting superior dimensional accuracy, a bright, smooth surface finish, and enhanced mechanical properties via strain hardening. The high manganese content (1.35-1.65%) provides excellent hardenability, while the cold drawing process yields a ready-to-machine material with improved strength, excellent straightness, and tight tolerances. It is engineered as a premium, consistent starting material for components that require precision machining and may undergo subsequent heat treatment for final properties.
**Key Features & Advantages**
* **Enhanced Strength & Hardness:** The cold drawing process significantly increases yield and tensile strength through strain hardening, providing a stronger base material for machined parts compared to hot-rolled stock.
* **Superior Dimensional Precision & Surface Quality:** Offers tight diameter tolerances (per ASTM A108), excellent straightness, and a smooth, bright, scale-free surface. This reduces machining allowances, improves part aesthetics, and minimizes secondary finishing.
* **Excellent Hardenability & Heat Treatment Response:** The high manganese content ensures good response to subsequent through-hardening (quenching & tempering) or case hardening, allowing for the development of high strength and wear resistance in the final component.
* **Good Machinability (for an alloy steel):** In the cold drawn condition, it offers fair and consistent machinability, providing predictable performance in automated machining centers and screw machines.
* **Production Efficiency:** Delivers near-net-shape precision that reduces setup time, material waste, and the need for initial turning operations, streamlining the manufacturing process.
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### **1. Chemical Composition (Standard Conformance)**
| Element | Standard Range (%) | Key Function |
| :--- | :--- | :--- |
| **Carbon (C)** | 0.19 – 0.25 | Provides base strength and hardenability. Balanced for good machinability and strong heat treatment response. |
| **Manganese (Mn)** | 1.35 – 1.65 | **Primary Alloying Element.** Significantly enhances hardenability, allowing for deeper hardening and contributing to strength and fine grain structure. |
| **Phosphorus (P)** | ≤ 0.040 (max) | Residual element, kept low for good toughness. |
| **Sulfur (S)** | ≤ 0.050 (max) | Residual element, kept low. **This is not a free-machining steel.** |
| **Silicon (Si)** | 0.15 – 0.35 | Deoxidizer; contributes to strength. |
| **Iron (Fe)** | Balance | Base element. |
**Key International Standard Equivalents:**
* **UNS:** G15240
* **AISI/SAE:** 1524
* **ASTM:** **A108** (Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished)
* **ASTM:** A29 (General Requirements)
* **DIN (Germany):** ~1.1151 / C22E (approximate, Mn differs)
* **EN (Europe):** 1.1151 / C22E (similar carbon, lower Mn)
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### **2. Typical Physical & Mechanical Properties (Cold Drawn Condition)**
*Note: Properties reflect the significant strain hardening from cold drawing.*
| Property | Typical Value / Description |
| :--- | :--- |
| **Density** | 7.85 g/cm³ (0.284 lb/in³) |
| **Tensile Strength** | 600 – 750 MPa (87 – 109 ksi) |
| **Yield Strength (0.2% Offset)** | **480 – 620 MPa (70 – 90 ksi)** – *Key benefit of cold work* |
| **Elongation (in 50mm)** | 15% – 22% |
| **Brinell Hardness (HB)** | 190 – 240 |
| **Machinability (Comparison)** | Fair (~50% of AISI 1212). Consistent and predictable. |
| **Surface Roughness (Ra)** | 1.6 – 3.2 μm (63 – 125 μin). Bright, smooth finish. |
| **Tolerances** | Meets ASTM A108 cold-drawn tolerances. |
| **Hardenability Potential** | Medium-High; responds well to subsequent quenching & tempering. |
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### **3. Product Applications**
AISI 1524 cold drawn bars are specified for precision components requiring good strength, dimensional accuracy, and a reliable foundation for heat treatment.
* **Precision Shafts and Pins:** Axle shafts, spindle shafts, dowel pins, and guide rods requiring straightness and a smooth bearing surface.
* **Fasteners and Studs:** High-strength bolts, studs, and pins that are machined and then heat-treated.
* **Hydraulic and Pneumatic Components:** Piston rods, cylinder rods, and valve parts where surface finish and strength are critical.
* **Automotive Components:** Transmission parts, steering components, and engine parts requiring precision and strength.
* **Gear and Sprocket Blanks:** Stock for medium-duty gears and sprockets that will be machined and case-hardened.
* **General Precision Machinery Parts:** Bushings, couplings, and fittings where the cold drawn condition provides manufacturing advantages.
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### **4. Important Considerations**
* **Residual Stress Management:** Cold drawing introduces residual surface stresses. For parts undergoing complex or asymmetric machining, **stress-relieving heat treatment prior to final machining is recommended** to prevent distortion.
* **Heat Treatment After Machining:** This material is often used as-machined from the cold drawn state for its enhanced strength. For highest strength, it can be quenched and tempered after machining (requiring accounting for potential distortion).
* **Machinability:** Not a free-machining grade. Requires appropriate tool grades, geometries, and coolants for optimal results. Annealing may be specified if extensive machining is needed.
* **Weldability:** **Weldable with proper procedures** (preheat, low-hydrogen electrodes, post-weld heat treatment for critical applications), though the cold worked structure may be altered in the HAZ.
* **Comparison to Hot-Rolled 1524:** Offers superior surface finish, tighter tolerances, higher strength, and better straightness. It is the premium choice for precision machining.
* **Comparison to 1144/1141:** 1524 CD offers better weldability, through-hardenability, and toughness, but lower machinability than the free-machining grades. 1524 is a performance steel, while 1144 is a machining steel.
* **"H" Grade Available:** **AISI 1524H** is available in cold drawn form for applications requiring guaranteed hardenability bands for predictable heat treatment results.
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**Disclaimer:** This information is based on typical industry specifications. Actual properties may vary. For engineering applications, consult certified material test reports and conduct appropriate testing. Cold drawn material requires proper handling to maintain dimensional stability during machining operations.
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AISI 1524 Steel, Cold Drawn Bar (UNS G15240) Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5034 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 1524 Steel, Cold Drawn Bar (UNS G15240) Properties
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Applications of AISI 1524 Steel Flange, Cold Drawn Bar (UNS G15240)
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Chemical Identifiers AISI 1524 Steel Flange, Cold Drawn Bar (UNS G15240)
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Packing of AISI 1524 Steel Flange, Cold Drawn Bar (UNS G15240)
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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 1505 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
