ASTM A517 Low Alloy Steel Capillary, Grade F

ASTM A517 Low Alloy Steel Capillary, Grade F Product Information -:- For detailed product information, please contact sales. -: ASTM A517 Low Alloy Steel Capillary, Grade F Synonyms -:- For detailed product information, please contact sales. -:

ASTM A517 Low Alloy Steel, Grade F Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A517 Grade F: High-Strength Quenched and Tempered Alloy Steel** #### **1. Overview** ASTM A517 is a standard specification for high-strength, quenched and tempered alloy steel plates used in demanding applications such as pressure vessels, bridges, and structural components. **Grade F** is a specific grade within this family, engineered to provide an exceptional combination of ultra-high strength and good toughness. Like other grades in the A517 specification, it undergoes a rigorous heat treatment process (quenching and tempering) to achieve its remarkable mechanical properties. Grade F is particularly noted for its ability to maintain high strength in thicker sections, making it a preferred material for reducing weight in critical, heavily loaded structures. #### **2. Chemical Composition** The chemical composition for ASTM A517 Grade F is carefully balanced to achieve deep hardenability and high strength after heat treatment. The following table outlines the required percentages (by heat analysis): | Element | Composition (%) | | :--- | :--- | | Carbon (C) | 0.10 - 0.20 | | Manganese (Mn) | 0.60 - 1.00 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.15 - 0.35 | | Nickel (Ni) | 0.70 - 1.00 | | Chromium (Cr) | 0.40 - 0.65 | | Molybdenum (Mo) | 0.40 - 0.60 | | Boron (B) | 0.0005 - 0.0050 | | Vanadium (V) | 0.02 - 0.10 | **Key Alloying Roles:** * **Carbon & Manganese:** Provide base strength and hardenability. * **Nickel & Chromium:** Enhance hardenability, toughness, and strength, particularly in thick sections. Nickel is especially beneficial for low-temperature toughness. * **Molybdenum:** A potent hardenability agent that also provides secondary hardening during tempering and increases elevated temperature strength. The molybdenum content in Grade F is typically higher than in Grade E. * **Boron:** A powerful element that significantly increases hardenability, allowing for high strength with a leaner overall alloy content, which can improve weldability. * **Vanadium:** Contributes to grain refinement and precipitation strengthening. #### **3. Physical & Mechanical Properties** ASTM A517 Grade F is supplied in the quenched and tempered condition. The following mechanical properties are typically required for plates up to 2.5 inches (63.5 mm) in thickness: | Property | Requirement | | :--- | :--- | | **Tensile Strength** | 115 - 135 ksi (790 - 930 MPa) | | **Yield Strength (min)** | 100 ksi (690 MPa) | | **Elongation in 2-in (50 mm) (min)** | 16% | | **Reduction of Area (min)** | 50% | | **Hardness (Brinell)** | Typically 235 - 293 HBW | **Impact Toughness:** * **Charpy V-Notch (CVN) Impact Test:** Required at **-50°F (-46°C)**. * **Minimum Average Value:** 15 ft-lb (20 J) for longitudinal specimens. **Physical Properties (Typical Values):** * **Density:** 0.284 lb/in³ (7850 kg/m³) * **Modulus of Elasticity:** 29,000 ksi (200 GPa) * **Poisson's Ratio:** 0.29 * **Coefficient of Thermal Expansion:** ~6.5 x 10^-6/°F (11.7 x 10^-6/°C) #### **4. Product Applications** The primary advantage of ASTM A517 Grade F is its high strength-to-weight ratio, which leads to lighter and more efficient designs in heavy-duty applications. Its uses include: * **Pressure Vessels:** For high-pressure storage and transport of gases (e.g., CNG, hydrogen), and reactors in the chemical and petrochemical industries. * **Lifting and Construction Equipment:** Critical components in mobile cranes, boom sections, and excavators where high strength reduces dead weight and increases payload capacity. * **Mining Equipment:** Used in shovel frames, buckets, and other high-abrasion, high-stress components. * **Structural Applications:** In bridges, offshore platforms, and other structures where minimizing material thickness is crucial for cost and logistics. * **Military Vehicles:** For armored vehicle components requiring ballistic protection combined with mobility. #### **5. International Standards & Equivalents** ASTM A517 Grade F has close equivalents in other international standards. However, due to nuanced differences in chemistry and processing, they are not always direct substitutes and require careful evaluation for each application. | Standard | Equivalent Grade | Key Differences / Notes | | :--- | :--- | :--- | | **ASTM A517** | **Grade F** | The base specification. | | **EN 10028-6** | **S690Q** | A European equivalent with similar strength and application. Chemical composition may vary. | | **ISO 4950-3** | **EQ 70** | An international standard for high-yield strength quenched and tempered steels. | | **JIS G 3128** | **SHY 685** | A Japanese high-yield strength steel. The chemical composition, particularly Mo content, may differ. | **Important Note on Fabrication:** Fabricating ASTM A517 Grade F requires strict adherence to qualified procedures, especially for **welding**. Due to its high hardenability, it is highly susceptible to hydrogen-induced cracking (HIC) or cold cracking. Essential practices include: * **Pre-heating** to a specified temperature. * Using low-hydrogen welding consumables. * Controlling interpass temperature. * Often requiring **Post-Weld Heat Treatment (PWHT)** to relieve residual stresses and temper the heat-affected zone (HAZ). --- **Disclaimer:** This information is for reference purposes only. The latest version of the official **ASTM A517** standard and consultation with qualified materials engineers must be relied upon for critical design and fabrication. -:- For detailed product information, please contact sales. -: ASTM A517 Low Alloy Steel, Grade F Specification Dimensions Size： Diameter 20-1000 mm Length <4411 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. -: ASTM A517 Low Alloy Steel, Grade F Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A517 Low Alloy Steel Capillary, Grade F -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A517 Low Alloy Steel Capillary, Grade F -:- For detailed product information, please contact sales. -:

Packing of ASTM A517 Low Alloy Steel Capillary, Grade 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 Capillary 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 882 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