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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AK Steel Flange ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy Steel Flange (HSLA-F) Product Information
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AK Steel Flange ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy Steel Flange (HSLA-F) Synonyms
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AK Steel ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel, Medium/High Strength Low Alloy Steel (HSLA-F) Product Information
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**Product Name:** AK Steel ASTM A1011, Class 2 Formable, Grade 50F Hot-Rolled High-Strength Low-Alloy Steel (Improved Formability)
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### **1. Overview**
AK Steel's ASTM A1011 **Grade 50F, Class 2 Formable** is a specialized high-strength low-alloy (HSLA) steel engineered for applications that require a 50 ksi (345 MPa) minimum yield strength combined with **significantly improved formability**. The "F" suffix denotes "Improved Formability," a specific designation within the ASTM A1011 standard. While sharing the same strength requirement as Grade 50K, the 50F chemistry and processing are specifically optimized to provide better ductility and formability without sacrificing the strength target. This makes it an ideal choice for fabricating components that require more complex shapes, deeper draws, or tighter bend radii than what can be achieved with a standard Grade 50K steel.
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### **2. International Standards**
This product conforms to the following standard, meeting the specific requirements for improved formability:
* **ASTM A1011 / A1011M:** Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with **Improved Formability**.
* **Grade:** 50F. The "F" specifically indicates it belongs to the "Improved Formability" category of the standard, which has distinct property requirements from the "K" (microalloyed) grades.
* **Formability Class:** **Class 2.** For 50F, the "Class 2" classification aligns with its structural level of formability, but the inherent "F" chemistry provides enhanced forming characteristics compared to a non-F grade.
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### **3. Chemical Composition (Typical, % by Weight)**
The 50F grade achieves its combination of strength and improved formability through a carefully controlled, low-carbon, high-manganese chemistry, often with specific deoxidation and grain refinement practices.
| Element | Content (Typical / Maximum) | Role & Implication |
| :--- | :--- | :--- |
| **Carbon (C)** | 0.10% - 0.15% max | Maintained at a low level to maximize ductility and weldability. |
| **Manganese (Mn)** | 1.10% - 1.50% | Primary strengthening element. Higher manganese increases strength through solid solution strengthening while maintaining good ductility, which is key to the "F" grade concept. |
| **Phosphorus (P)** | 0.035% max | Residual; kept low. |
| **Sulfur (S)** | 0.035% max | Residual; controlled. May be calcium treated for improved formability. |
| **Silicon (Si)** | 0.10% - 0.30% | Deoxidizer; kept moderate to preserve formability. |
| **Aluminum (Al), Total** | 0.010% min | Grain refiner for fine-grained practice, crucial for achieving the improved formability. |
| **Key Characteristic:** | **Balanced High-Manganese, Low-Carbon Chemistry.** The strength is derived predominantly from manganese rather than high carbon or strong precipitation hardening from microalloys (Nb/V). This results in a more uniform microstructure that can deform more easily, leading to the improved formability. | |
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### **4. Physical & Mechanical Properties**
The key distinction lies in achieving the same 50 ksi minimum yield strength with better forming characteristics.
| Property | Specification Minimum (ASTM A1011, Grade 50F, Class 2) | Typical Value / Description | Comparison vs. 50K |
| :--- | :--- | :--- | :--- |
| **Yield Strength (min)** | 50 ksi (345 MPa) | 50-58 ksi. | **Same** |
| **Tensile Strength** | 65 ksi min (450 MPa) | 65-75 ksi. | **Typically lower** than 50K, leading to a lower Y/T ratio. |
| **Yield-to-Tensile Ratio (Y/T)** | **Lower than standard 50K** | Typically 0.78 - 0.82. A lower ratio is a key indicator of improved formability, as it allows for more uniform plastic deformation before necking. | **Better for forming** |
| **Elongation in 2" (min)** | **Higher than standard 50K** (e.g., 20-23% min) | Typically meets or exceeds minimums, often 22-26%. | **Better ductility** |
| **Total Elongation (Uniform + Local)** | Higher | More elongation is available for forming complex shapes. | **Better for stretching/drawing** |
| **Strain Hardening Exponent (n-value)** | Higher | Promotes more uniform stretching and better resistance to localized thinning. | **Better for forming** |
| **Modulus of Elasticity** | 29,000 ksi (200 GPa) | | Same |
| **Notch Toughness** | Good | Adequate for structural applications, but may not be as high as optimally processed microalloyed 50K grades. | Comparable or slightly lower |
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### **5. Key Features & Advantages**
* **Enhanced Formability at 50 ksi Strength:** The primary advantage. Allows for more complex part geometries, tighter bend radii, and deeper draws than standard 50K material.
* **Good Weldability:** The low carbon equivalent ensures good weldability with standard procedures.
* **Cost-Effective Formable Option:** Often provides a more economical path to forming 50 ksi parts compared to using a higher-cost formable microalloyed grade (like 50K Class 1) or needing to use a thicker gauge of a lower-strength steel.
* **Consistent Performance:** Provides a predictable balance of properties well-suited for parts requiring both strength and shape complexity.
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### **6. Product Applications**
Grade 50F is ideal for components that need to meet a 50 ksi strength requirement but also undergo significant forming during manufacturing.
* **Automotive Structural Parts:** Seat frames, bumper reinforcements, crossmembers, and chassis components that are stamped or roll-formed.
* **Heavy Equipment Cab & Body Components:** Formed doors, panels, and structural housings for tractors, loaders, and construction equipment.
* **Agricultural Equipment:** Formed implement components, fenders, and structural parts that require durability and complex shapes.
* **Storage & Material Handling:** Formed components for heavy-duty racks, bins, and containers.
* **General Fabrication:** Any part where the design calls for a 50 ksi material but the fabrication process involves bending, drawing, or stamping that is challenging for standard 50K.
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### **7. Fabrication & Processing Notes**
* **Forming:** **Excellent for cold forming** relative to its strength. Suitable for bending, roll-forming, and moderate drawing. **Minimum recommended bend radii are typically 2.5x to 3.5x material thickness**—better than 50K Class 2. Springback is moderate and predictable.
* **Welding:** **Good weldability.** Use low-hydrogen practices (GMAW, FCAW). Preheating (100-200°F / 40-95°C) may be recommended for thicknesses over 0.75". Use filler metals with matching strength (70 ksi tensile).
* **Cutting:** All standard methods (shearing, plasma, laser) are applicable.
* **Selection Guide:** Use **50F** when you need **50 ksi yield strength with good, all-around formability** for parts with moderate complexity.
* Use **50K Class 2** when you need **50 ksi strength for primarily straight or simply bent structural members** and want the highest possible toughness.
* Use **50K Class 1** when you need **50 ksi strength for the most severe forming operations** (deep drawing, complex stamping), where maximum ductility is critical.
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**Disclaimer:**
*This profile is a technical summary. AK Steel is now part of Cleveland-Cliffs Inc.*
For engineering and procurement, always consult the latest official **ASTM A1011** specification and the certified **Mill Test Report (MTR)**. The "F" grade is a distinct metallurgical approach. Ensure the purchase order specifies **"ASTM A1011, Grade 50F"** to receive the improved formability version. Performance can vary between producers; review the actual MTR data for elongation and tensile strength to confirm the enhanced forming characteristics.
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AK Steel ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel, Medium/High Strength Low Alloy Steel (HSLA-F) Specification
Dimensions
Size：
Diameter 20-1000 mm Length <4602 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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AK Steel ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel, Medium/High Strength Low Alloy Steel (HSLA-F) Properties
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Applications of AK Steel Flange ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy Steel Flange (HSLA-F)
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Chemical Identifiers AK Steel Flange ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy Steel Flange (HSLA-F)
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Packing of AK Steel Flange ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy Steel Flange (HSLA-F)
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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 1073 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
