ASTM A517 Low Alloy Steel Seamless tube, Grade P

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

ASTM A517 Low Alloy Steel, Grade P Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A517 Grade P: High-Strength Quenched and Tempered Alloy Steel** #### **1. Overview** ASTM A517 is a standard specification for high-strength, quenched and tempered alloy steel plates primarily used in pressure vessels and other critical applications. **Grade P** is a specialized grade within this family, formulated to provide exceptional strength and toughness properties in **thicker sections**. This grade achieves its superior mechanical properties through a carefully balanced chemical composition and rigorous heat treatment process (quenching and tempering), making it particularly suitable for heavy-walled pressure vessels and structural components where through-thickness properties are critical. #### **2. Chemical Composition** The chemical composition of ASTM A517 Grade P is optimized for deep hardenability to maintain consistent properties in thick sections. The following table outlines the required percentages (by heat analysis): | Element | Composition (%) | | :--- | :--- | | Carbon (C) | 0.20 - 0.30 | | 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) | 0.0015 - 0.0050 | | Vanadium (V) | 0.02 - 0.10 | **Key Alloying Roles:** * **Carbon & Manganese:** Provide fundamental strength and hardenability * **Nickel:** Enhances toughness and hardenability, particularly important in thick sections * **Chromium & Molybdenum:** Work synergistically to increase hardenability depth and tempering resistance * **Boron:** A powerful hardenability intensifier crucial for maintaining strength in heavy thicknesses * **Vanadium:** Contributes to grain refinement and secondary hardening #### **3. Physical & Mechanical Properties** ASTM A517 Grade P is supplied in the quenched and tempered condition. The mechanical properties are maintained through thicker sections compared to many other grades: | Property | Requirement (up to 4 inches / 100 mm) | | :--- | :--- | | **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)** | 45% | | **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 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) #### **4. Product Applications** Grade P's ability to maintain high strength and toughness in thick sections makes it particularly valuable for demanding applications: * **Heavy-Walled Pressure Vessels:** Reactors, separators, and storage vessels in petrochemical and chemical processing industries * **Hydraulic Press Frames:** Components requiring high strength in thick cross-sections * **Mining Equipment:** Shovel bases, support structures, and other heavy components * **Power Generation Equipment:** Turbine components and pressure-containing parts * **Structural Applications:** Heavy construction and bridge components where thick plates are required #### **5. International Standards & Equivalents** ASTM A517 Grade P has functional equivalents in other international standards, though direct substitution requires careful evaluation: | Standard | Equivalent Grade | Notes | | :--- | :--- | :--- | | **ASTM A517** | **Grade P** | Base specification | | **EN 10028-6** | **S690Q** | European equivalent with similar strength characteristics | | **ISO 4950-3** | **EQ 70** | International standard for high-yield strength steels | **Important Fabrication Considerations:** * **Welding:** Requires strict control including pre-heating and low-hydrogen processes * **Post-Weld Heat Treatment:** Typically required for stress relief * **Section Sensitivity:** Properties may vary through thickness - appropriate testing is essential * **Quality Assurance:** Extensive testing often required for thick-section applications --- **Disclaimer:** This information is for reference purposes only. For critical applications, consult the latest ASTM A517 standard and qualified materials engineers. Actual properties may vary by manufacturer and specific heat treatment processes. -:- For detailed product information, please contact sales. -: ASTM A517 Low Alloy Steel, Grade P Specification Dimensions Size： Diameter 20-1000 mm Length <4415 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 P Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A517 Low Alloy Steel Seamless tube, Grade P -:- 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 Seamless 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 886 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