Spherical ASTM A387 Alloy Steel Powder, Grade 5, Class 1

ASTM A387 Alloy Steel Spherical Powder, Grade 5, Class 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel Spherical Powder, Grade 5, Class 1 Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A387 Alloy Steel Powder, Grade 5, Class 1 characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A387 Alloy Steel Powder, Grade 5, Class 1 Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical ASTM A387 Alloy Steel Powder, Grade 5, Class 1 Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical ASTM A387 Alloy Steel Powder, Grade 5, Class 1 Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel, Grade 5, Class 1 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A387 Grade 5 Class 1 Alloy Steel Plate** **ASTM A387 Grade 5 Class 1** is a medium-chromium, molybdenum alloy steel plate specifically designed for **pressure vessel components operating at elevated temperatures**. The "Grade 5" designation indicates its higher alloy content (primarily 4-6% Chromium and 0.45-0.65% Molybdenum), while "Class 1" signifies that the material is supplied in the **as-rolled or as-supplied condition**, without mandatory final heat treatment by the mill. (Note: Fabricators are typically required to perform heat treatment after welding and forming). This material is selected for applications requiring **superior elevated-temperature strength, oxidation resistance, and sulfidation resistance** compared to lower-grade Cr-Mo steels like Grade 2 or Grade 11. It is a workhorse material for critical service in petrochemical and power industries. --- #### **1. Key International Standards** * **Primary Material Standard:** **ASTM A387/A387M** - Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum. * **Common Supplementary Standards:** * **ASTM A20/A20M:** Standard Specification for General Requirements for Steel Plates for Pressure Vessels. * **ASME Section II, Part A:** The ASME Boiler and Pressure Vessel Code adopts this material as **SA-387 Grade 5 Class 1**. * **EN 10028-2:** The comparable European standard is **P5** (1.7362). --- #### **2. Chemical Composition (Weight %, ASTM A387)** | Element | Composition (%) | | :--- | :--- | | Carbon (C) | 0.15 max | | Manganese (Mn) | 0.30 - 0.60 | | Phosphorus (P), max | 0.035 | | Sulfur (S), max | 0.035 | | Silicon (Si) | 0.50 max | | Chromium (Cr) | 4.00 - 6.00 | | Molybdenum (Mo) | 0.45 - 0.65 | *Note: The higher chromium content is key for improved oxidation/corrosion resistance.* --- #### **3. Mechanical & Physical Properties (Typical for Class 1, As-Rolled Condition)** * **Tensile Strength:** **415 - 585 MPa** (60,000 - 85,000 psi) * **Yield Strength (min):** **205 MPa** (30,000 psi) * **Elongation in 2 in. (50 mm) (min):** 18% (in longitudinal direction) * **Hardness (Typical):** Approximately 170-220 HB * **Physical Properties (At Room Temperature):** * **Density:** 7.83 g/cm³ (0.283 lb/in³) * **Modulus of Elasticity:** 200 GPa (29 x 10⁶ psi) * **Thermal Conductivity:** ~ 37 W/m·K (lower than carbon steel due to alloying) * **Coefficient of Thermal Expansion:** ~ 11.5 x 10⁻⁶ /K (20-100°C) (lower than carbon steel) --- #### **4. Key Characteristics & Advantages** * **Enhanced Oxidation & Sulfidation Resistance:** The **4-6% Chromium** content forms a more stable and protective oxide layer at high temperatures (typically up to ~600°C / 1110°F), offering better resistance against scaling and attack from sulfur compounds found in crude oil and process streams. * **High-Temperature Strength:** Maintains excellent tensile and creep rupture strength at elevated temperatures, outperforming lower-alloy steels. * **Good Hydrogen Resistance:** Suitable for moderate-temperature hydrogen service, though for severe conditions, higher alloys like Grade 9 or 91 may be required. * **Microstructural Stability:** The alloy combination promotes stability under long-term exposure to heat, reducing the risk of undesirable phase transformations. * **Fabricability in Class 1 Condition:** Supplied as-rolled, it allows for cold or hot forming before the final mandatory heat treatment by the fabricator. --- #### **5. Product Applications** ASTM A387 Gr.5 Cl.1 is a preferred choice for demanding pressure vessel components in: * **Petrochemical & Refining (Primary Market):** * **Catalytic Cracking Units:** Reactor vessels, regenerators, catalyst strippers. * **Hydroprocessing Units:** Hot high-pressure separators, reactor effluent air coolers (REAC) inlet piping/headers (where conditions are less severe than reactor walls). * **Coking Units:** Process drums and transfer lines. * **Heavy Oil & Sulfur Recovery Plants:** Vessels exposed to hot corrosive gases. * **Power Generation:** * High-temperature steam piping and headers in fossil fuel plants (though Grade 91/T91 is now more common for new designs). * Components in heat recovery steam generators (HRSGs). * **General High-Temperature Pressure Vessels:** For chemical processes where heat and corrosion are key design factors. --- #### **6. Fabrication Notes** * **Mandatory Post-Fabrication Heat Treatment:** Unlike some normalized steels, **Class 1 material requires full heat treatment (Normalizing + Tempering or Quenching + Tempering) after all major fabrication steps (welding, hot forming) are completed.** This is crucial to develop the required microstructure and mechanical properties. * **Welding:** Requires strict control. Pre-heating (typically 150-250°C / 300-480°F) is essential. Common filler metals include AWS A5.5 E80XX-B5 or AWS A5.28 ER80S-B5. * **Post-Weld Heat Treatment (PWHT):** **Mandatory.** Performed in the range of **675-760°C (1250-1400°F)**, typically followed by slow cooling to prevent hardening and relieve stresses. **In summary, ASTM A387 Grade 5 Class 1 is a versatile and robust medium-chromium alloy steel, bridging the gap between low-alloy steels and high-alloy stainless grades. Its primary value lies in its balanced cost-performance ratio for high-temperature, moderately corrosive environments in the energy and chemical sectors. Proper fabrication and heat treatment are paramount to realize its full service potential.** -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel, Grade 5, Class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <6001 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 A387 Alloy Steel, Grade 5, Class 1 Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A387 Alloy Steel Powder, Grade 5, Class 1 Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A387 Alloy Steel Powder, Grade 5, Class 1 -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A387 Alloy Steel Spherical Powder, Grade 5, Class 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A387 Alloy Steel Spherical Powder, Grade 5, Class 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A387 Alloy Steel Spherical Powder, Grade 5, Class 1 -:- 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 Spherical Powder 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 2472 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