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 715 Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy (HSLA) Product Information
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AK Steel Flange ASTM A 715 Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy (HSLA) Synonyms
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AK Steel ASTM A 715 Class 2 Formable, Grade 50F Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) Product Information
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# **Product Introduction: AK Steel ASTM A715 Class 2 Formable, Grade 50F Hot-Rolled HSLA Steel**
**AK Steel ASTM A715 Class 2, Grade 50F** is a premium **hot-rolled, high-strength low-alloy (HSLA) steel sheet and strip** engineered to deliver **50 ksi (345 MPa) minimum yield strength** with **enhanced formability characteristics**. As part of the "**Formable**" (Class 2) category within the A715 specification, this grade is specifically designed for applications requiring **good cold formability alongside high strength**, making it suitable for components that undergo moderate to severe forming operations. The "**F**" designation indicates a **formability-enhanced version** of the standard Grade 50, achieved through controlled chemistry and processing optimizations. This material represents an advanced solution for manufacturers seeking to balance **structural performance with manufacturing flexibility** in weight-sensitive applications.
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## **International Standard & Key Specifications**
* **Primary Standard:** **ASTM A715/A715M** - Standard Specification for Steel Sheet and Strip, High-Strength, Low-Alloy, Hot-Rolled, and Cold-Rolled, with Improved Formability.
* **Class Distinction:** **Class 2 - Formable**. This classification indicates steel with **enhanced formability characteristics** compared to standard HSLA grades, achieved through specific chemical and processing controls.
* **Grade System:** **Grade 50F** specifies a minimum yield strength of 50 ksi (345 MPa) with **improved formability attributes**.
* **Related Standards:**
* **ASTM A1011/A1011M** - Specification for HSLAS (High-Strength Low-Alloy Steel).
* **SAE J1392** - Hot Rolled HSLA and Carbon Steel Sheet and Strip.
* **ASTM A370** - Standard Test Methods and Definitions for Mechanical Testing.
* **Key Feature:** Provides **50 ksi yield strength with significantly better formability** than conventional HSLA steels of similar strength, enabling more complex manufacturing operations.
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## **Chemical Composition (Weight %, typical)**
The chemistry is carefully optimized to enhance formability while maintaining 50 ksi yield strength through microalloying and controlled processing.
| Element | Composition (Typical for Class 2, Grade 50F) | Role in Performance |
| :--- | :--- | :--- |
| **Carbon (C)** | **0.10 - 0.15 max** | **Low carbon content** is critical for improved formability and weldability. |
| **Manganese (Mn)** | 0.80 - 1.40 | Provides solid solution strengthening while maintaining good formability. |
| **Phosphorus (P)** | 0.035 max | Tightly controlled impurity for enhanced formability. |
| **Sulfur (S)** | **0.025 max** | **Lower than standard grades** to improve formability and reduce cracking risk. |
| **Silicon (Si)** | 0.15 - 0.50 | Deoxidizer and solid solution strengthener. |
| **Columbium (Cb/Nb)** | 0.005 - 0.05 | Microalloy for grain refinement and precipitation strengthening. |
| **Vanadium (V)** | 0.01 - 0.08 | Alternative/complementary microalloy for precipitation strengthening. |
| **Titanium (Ti)** | 0.005 - 0.03 (optional) | May be added for additional grain refinement and sulfide shape control. |
| **Carbon Equivalent (CE)** | Typically 0.30 - 0.38 | **Lower than conventional Grade 50 steels**, indicating improved weldability and formability. |
**Processing Note:** The "Formable" designation is achieved through a combination of **optimized microalloying, controlled rolling practices, and potentially specific thermal treatments** to enhance ductility and forming characteristics without compromising strength.
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## **Typical Physical & Mechanical Properties (Hot-Rolled, Class 2, Grade 50F)**
| Property | Value / Description |
| :--- | :--- |
| **Tensile Strength** | 480 - 620 MPa (70,000 - 90,000 psi) |
| **Yield Strength (min)** | **345 MPa (50,000 ksi)** |
| **Elongation in 2-in (50 mm) (min)** | **22% - 26%** (Higher than conventional Grade 50 steels) |
| **Yield-to-Tensile Ratio** | Typically 0.72 - 0.78 |
| **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) |
| **Density** | ~7.85 g/cm³ (0.284 lb/in³) |
| **Formability** | **Very Good (for 50 ksi strength).** Suitable for **moderate to severe bending, roll-forming, and stamping operations.** Minimum bend radius typically **1.0-1.5× material thickness** for 90° bends. |
| **Weldability** | **Excellent.** Low carbon equivalent allows welding with minimal preheat requirements for most thicknesses. Low-hydrogen practices still recommended. |
| **Surface Quality** | Good surface finish suitable for exposed applications after painting. |
| **Strain Hardening Characteristics** | Enhanced compared to conventional HSLA steels, allowing better formability in complex shapes. |
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## **Product Applications**
AK Steel ASTM A715 Class 2, Grade 50F is ideal for components requiring both 50 ksi strength and good formability for manufacturing efficiency.
**Primary Industries and Products:**
1. **Automotive Components:**
* **Structural reinforcements** and body components requiring forming.
* **Chassis components** that undergo bending or stamping.
* **Seat frames and structural brackets.**
2. **Transportation Equipment:**
* **Trailer and truck body components** requiring formed shapes.
* **Agricultural equipment parts** with complex geometries.
* **Heavy vehicle components** needing both strength and formability.
3. **Construction & Building Products:**
* **Formed structural members** for buildings and infrastructure.
* **Architectural components** requiring bending and forming.
* **Support brackets and frames** with complex shapes.
4. **Industrial Equipment:**
* **Machine guards and enclosures** requiring formed configurations.
* **Material handling components** with formed geometries.
* **Equipment brackets and supports** needing both strength and formability.
5. **Consumer Products:**
* **Appliances and furniture components** requiring strength and formability.
* **Recreational equipment parts** with formed shapes.
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## **Advantages and Fabrication Considerations**
* **Advantages:**
* **Enhanced Formability:** Significantly better forming characteristics than conventional 50 ksi HSLA steels.
* **Good Strength Retention:** Maintains 50 ksi minimum yield strength despite improved formability.
* **Excellent Weldability:** Low carbon equivalent simplifies welding procedures and reduces preheat requirements.
* **Manufacturing Efficiency:** Enables more complex part designs and reduces manufacturing steps.
* **Weight Savings Potential:** Allows use of thinner gauges while maintaining strength, reducing material weight.
* **Fabrication Considerations:**
* **Tooling Design:** While more formable than standard Grade 50, still requires appropriate tooling for complex shapes.
* **Springback Management:** Springback is still present and should be accounted for in tooling design.
* **Welding Practices:** Although weldable with minimal preheat, **low-hydrogen practices are still recommended** for optimal results, especially for thicker sections.
* **Surface Preparation:** Standard surface preparation methods apply; pickled and oiled condition may be beneficial for painting applications.
* **Material Certification:** Ensure material is certified to **ASTM A715 Class 2, Grade 50F** to guarantee the enhanced formability properties.
* **Cost Considerations:** May have a premium over standard Grade 50 materials due to enhanced processing and properties.
* **Alternative Selection:** For applications requiring **maximum formability** with some strength compromise, consider lower strength formable grades. For **maximum strength** with less concern for formability, consider standard Grade 50 or higher strength grades.
**In summary, AK Steel ASTM A715 Class 2, Grade 50F represents an advanced HSLA steel solution that successfully bridges the gap between high strength and good formability. Its optimized chemistry and processing enable manufacturers to produce more complex formed components at 50 ksi strength levels, offering significant advantages in design flexibility, manufacturing efficiency, and weight optimization. This material is particularly valuable for applications where both structural performance and manufacturing complexity are important considerations.**
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AK Steel ASTM A 715 Class 2 Formable, Grade 50F Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) Specification
Dimensions
Size：
Diameter 20-1000 mm Length <4573 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 715 Class 2 Formable, Grade 50F Hot Rolled Carbon Steel, Medium/High Strength Low Alloy (HSLA) Properties
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Applications of AK Steel Flange ASTM A 715 Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy (HSLA)
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Chemical Identifiers AK Steel Flange ASTM A 715 Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy (HSLA)
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Packing of AK Steel Flange ASTM A 715 Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Flange, Medium/High Strength Low Alloy (HSLA)
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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 1044 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
