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 1151 Steel Flange, Hot Rolled Bar (UNS G11510) Product Information
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AISI 1151 Steel Flange, Hot Rolled Bar (UNS G11510) Synonyms
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AISI 1151 Steel, Hot Rolled Bar (UNS G11510) Product Information
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### **Product Introduction: AISI 1151 / UNS G11510 Hot Rolled Steel Bar**
**Overview**
AISI 1151 (UNS G11510) is a standard medium-carbon manganese steel supplied in hot rolled condition. Unlike the resulfurized free-machining grades (1141/1144), AISI 1151 is a **"straight" or "plain" carbon-manganese steel** characterized by controlled manganese content at the higher end of the standard carbon steel range. This composition provides enhanced hardenability, strength, and wear resistance over basic grades like 1045, while maintaining good ductility and toughness. As a hot rolled bar, it is the most economical and readily available form, suitable for components that will be forged, machined, and subsequently heat treated to achieve their final mechanical properties.
**Key Features & Advantages**
* **Enhanced Hardenability:** The elevated manganese content (0.70-1.00%) provides better through-hardening capability than lower manganese grades, allowing for effective heat treatment of larger cross-sections.
* **Good Strength and Toughness Balance:** Offers a robust combination of tensile strength and impact resistance, especially after proper heat treatment.
* **Good Forgeability and Weldability:** As a non-resulturized grade with low sulfur and phosphorus, it exhibits significantly better forgeability and weldability compared to 11xx series free-machining steels.
* **Cost-Effective Performance Steel:** Serves as a versatile, economical workhorse material for a wide range of demanding applications requiring heat treatment.
* **Wide Availability:** A standard grade commonly stocked in various hot rolled bar sizes.
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### **1. Chemical Composition (Standard Conformance)**
| Element | Standard Range (%) | Key Function |
| :--- | :--- | :--- |
| **Carbon (C)** | 0.48 – 0.55 | Provides core strength, hardness, and hardenability. Defines it as a medium-high carbon steel. |
| **Manganese (Mn)** | 0.70 – 1.00 | **Key feature.** Enhances hardenability and strength significantly, improves wear resistance. |
| **Phosphorus (P)** | ≤ 0.040 (max) | Residual element kept low to maintain toughness. |
| **Sulfur (S)** | ≤ 0.050 (max) | Residual element kept low. This distinguishes it from 11xx free-machining grades and ensures better ductility and weldability. |
| **Silicon (Si)** | 0.15 – 0.35 | Deoxidizer during steelmaking; contributes to strength. |
| **Iron (Fe)** | Balance | Base element. |
**Key International Standard Equivalents:**
* **UNS:** G11510
* **AISI/SAE:** 1151
* **ASTM:** A29 (Specification for Steel Bars, Carbon and Alloy, Hot-Wrought)
* **AMS:** None specific, but may be supplied to relevant bar specs.
* **DIN (Germany):** 1.0535 / C55 (approximate equivalent, Mn differs)
* **EN (Europe):** 1.0535 / C55 (approximate equivalent)
* **JIS (Japan):** S55C (approximate equivalent)
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### **2. Typical Physical & Mechanical Properties (Hot Rolled, As-Rolled Condition)**
*Note: AISI 1151 is rarely used in the final as-rolled condition. It is typically heat treated (normalized, annealed, or quenched & tempered) for final use. The values below are for reference.*
| Property | Hot-Rolled (Typical) | Normalized (Typical) | Quenched & Tempered (Example) |
| :--- | :--- | :--- | :--- |
| **Density** | 7.85 g/cm³ | 7.85 g/cm³ | 7.85 g/cm³ |
| **Tensile Strength** | 620 – 750 MPa | 650 – 800 MPa | 900 – 1200+ MPa |
| **Yield Strength** | 345 – 480 MPa | 380 – 550 MPa | 700 – 1000+ MPa |
| **Elongation (in 50mm)** | 18% – 25% | 16% – 22% | 10% – 18% |
| **Reduction of Area** | 40% – 55% | 40% – 55% | 35% – 50% |
| **Brinell Hardness (HB)** | 170 – 210 | 180 – 220 | 300 – 400+ |
| **Machinability (As-Rolled/Norm)** | Fair (Compared to 1212=100%) | Fair to Good | Poor (requires hard machining) |
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### **3. Product Applications**
AISI 1151 hot rolled bar is selected for applications requiring good hardenability, strength, and wear resistance after heat treatment.
* **Forged Components:** Crankshafts, connecting rods, lever arms, and other high-strength forged parts where good hot workability is needed.
* **Shafts and Axles:** High-stress power transmission shafts, axles, and spindles that are routinely through-hardened and tempered.
* **Gears and Sprockets:** Medium to heavy-duty gears, pinions, and sprockets that are carburized or through-hardened for wear resistance.
* **Wear Parts:** Plow shares, scraper blades, liners, and other parts requiring a hard, wear-resistant surface.
* **Agricultural and Off-Road Equipment:** High-stress components like axle shafts, pivot pins, and drive components.
* **General High-Strength Machine Parts:** Parts requiring a combination of machinability in the soft state and the ability to be heat treated to high strength levels.
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### **4. Important Distinctions & Considerations**
* **vs. AISI 1141/1144:** The most critical difference is the **low sulfur (<0.050%)**. This makes 1151 **weldable** and suitable for **forging**, but gives it **poorer machinability** than the free-machining grades. 1151 is a **performance/hardenability steel**, while 1141/1144 are **machining steels**.
* **vs. AISI 1045/1050:** Has higher manganese content, which provides greater hardenability, allowing thicker sections to be through-hardened effectively.
* **Heat Treatment is Standard:** This grade is almost always specified with a required heat treatment (e.g., "1151, Q&T to HRC 28-32" or normalized) for its final application.
* **Not a Free-Machining Steel:** Requires appropriate cutting tools, feeds, speeds, and coolants for production machining in its soft state.
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AISI 1151 Steel, Hot Rolled Bar (UNS G11510) Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5000 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 1151 Steel, Hot Rolled Bar (UNS G11510) Properties
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Applications of AISI 1151 Steel Flange, Hot Rolled Bar (UNS G11510)
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Chemical Identifiers AISI 1151 Steel Flange, Hot Rolled Bar (UNS G11510)
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Packing of AISI 1151 Steel Flange, Hot Rolled Bar (UNS G11510)
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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 1471 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
