ASTM A 1011, Class 2 Formable, Hot Rolled Carbon Steel Tube,Pipe, Medium/High Strength Low Alloy Steel Tube,Pipe (HSLA-F)

AK Steel Tube ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Tube, Medium/High Strength Low Alloy Steel Tube (HSLA-F) Product Information -:- For detailed product information, please contact sales. -: AK Steel Tube ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Tube, Medium/High Strength Low Alloy Steel Tube (HSLA-F) Synonyms -:- For detailed product information, please contact sales. -:

AK Steel ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel, Medium/High Strength Low Alloy Steel (HSLA-F) Product Information -:- For detailed product information, please contact sales. -: **Product Name:** AK Steel ASTM A1011, Class 2 Formable, Grade 50F Hot-Rolled High-Strength Low-Alloy Steel (Improved Formability) --- ### **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. --- ### **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. --- ### **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. | | --- ### **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 | --- ### **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. --- ### **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. --- ### **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. --- **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. -:- For detailed product information, please contact sales. -: 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 -:- For detailed product information, please contact sales. -: AK Steel ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel, Medium/High Strength Low Alloy Steel (HSLA-F) Properties -:- For detailed product information, please contact sales. -:

Applications of AK Steel Tube ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Tube, Medium/High Strength Low Alloy Steel Tube (HSLA-F) -:- For detailed product information, please contact sales. -: Chemical Identifiers AK Steel Tube ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Tube, Medium/High Strength Low Alloy Steel Tube (HSLA-F) -:- For detailed product information, please contact sales. -:

Packing of AK Steel Tube ASTM A 1011, Class 2 Formable, Grade 50F Hot Rolled Carbon Steel Tube, Medium/High Strength Low Alloy Steel Tube (HSLA-F) -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Tube 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