Spherical ASTM A387 Alloy Steel Powder, grade 22, Chromium Molybdenum

ASTM A387 Alloy Steel Spherical Powder, grade 22, Chromium Molybdenum Product Information -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel Spherical Powder, grade 22, Chromium Molybdenum Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A387 Alloy Steel Powder, grade 22, Chromium Molybdenum characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A387 Alloy Steel Powder, grade 22, Chromium Molybdenum 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 22, Chromium Molybdenum 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 22, Chromium Molybdenum Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel, grade 22, Chromium Molybdenum Product Information -:- For detailed product information, please contact sales. -: **Product Introduction: ASTM A387 Grade 22 Alloy Steel Plate (Chromium-Molybdenum Steel)** --- ### **1. Overview** ASTM A387 Grade 22 is a pressure vessel quality chromium-molybdenum alloy steel plate designed for high-temperature service. It is part of a family of steels specified primarily for welded boilers and pressure vessels where elevated temperature strength and resistance to hydrogen attack are critical. The "Grade 22" designation, also commonly referred to as **2.25Cr-1Mo** steel, indicates its nominal composition of 2.25% chromium and 1% molybdenum. This alloy composition provides significantly superior creep strength, oxidation resistance, and hydrogen resistance compared to carbon steels, making it a cornerstone material for critical components in power generation and petrochemical industries. --- ### **2. International Standards** This material is governed primarily by the ASTM A387 specification and is recognized in virtually all major international pressure equipment codes. * **Primary Standard:** * **ASTM A387/A387M:** *Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum.* This standard defines the requirements for plates, including two classes: * **Class 1:** Supplied in the normalized and tempered or annealed condition (lower strength). * **Class 2:** Supplied in the normalized and tempered condition (higher strength, standard for most applications). * **Key International & Industry Equivalents:** * **ASME SA-387:** The ASME Boiler and Pressure Vessel Code (BPVC) Section II adoption of ASTM A387. This is the mandatory specification for code construction (e.g., ASME Section VIII, Div. 1). * **EN 10028-2 10CrMo9-10:** The European standard for flat products for pressure purposes. The grade 10CrMo9-10 (Material No. 1.7380) is the closest equivalent. * **JIS G3115 SCMV 28:** Japanese Industrial Standard for Cr-Mo steel plates for pressure vessels. * **GB 713 15CrMoR:** Chinese standard for pressure vessel steel plates. * **Related Product Standards:** This plate material is commonly used to fabricate components that conform to standards like **ASTM A335 P22** (seamless pipe) and **ASTM A213 T22** (seamless tube). --- ### **3. Chemical Composition (Weight %, per ASTM A387 Gr.22, Class 2)** The carefully balanced chemistry ensures performance under stress at high temperatures. | Element | Composition (%) | Role & Benefit | | :--- | :--- | :--- | | **Carbon (C)** | 0.05 – 0.15 | Provides fundamental strength. Lower carbon improves weldability. | | **Manganese (Mn)**| 0.30 – 0.60 | Enhances strength, hardenability, and deoxidization. | | **Phosphorus (P)**| ≤ 0.025 | Impurity, controlled to prevent embrittlement. | | **Sulfur (S)** | ≤ 0.025 | Impurity, controlled to improve ductility and weldability. | | **Silicon (Si)** | 0.50 (max) | Deoxidizer, strengthens ferrite. | | **Chromium (Cr)** | 2.00 – 2.50 | **Primary alloy.** Confers oxidation and sulfidation resistance, increases elevated temperature strength, and provides resistance to hydrogen attack. | | **Molybdenum (Mo)**| 0.90 – 1.10 | **Primary alloy.** Greatly enhances high-temperature strength, creep resistance, and hardenability. | --- ### **4. Typical Physical & Mechanical Properties (Class 2, Normalized & Tempered)** * **Tensile Strength:** 515 - 690 MPa (75,000 - 100,000 psi) * **Yield Strength (0.2% Offset):** ≥ 310 MPa (45,000 psi) *[Minimum]* * **Elongation (% in 50mm / 2in):** ≥ 18% *[Minimum]* * **Hardness:** Typically 150 - 210 HB (Brinell); maximum is often specified per application (e.g., 225 HB for weldability). * **Density:** ~ 7.86 g/cm³ (0.284 lb/in³) * **Modulus of Elasticity:** ~ 200 GPa (29 x 10⁶ psi) at room temperature. * **Thermal Conductivity:** ~ 38 W/m·K (at 100°C) * **Specific Heat:** ~ 460 J/kg·K (at 100°C) * **Coefficient of Thermal Expansion:** ~ 12.0 x 10⁻⁶ /K (20-100°C) * **Critical Service Properties:** Exhibits excellent resistance to hydrogen attack (per Nelson Curve) and good oxidation resistance up to **~600°C (1112°F)**. Creep strength is a key design factor up to **~565°C (1050°F)**. --- ### **5. Product Application** ASTM A387 Gr.22 plates are fundamental to the construction of heavy-walled, high-integrity pressure equipment operating under severe conditions. * **Hydrogen Service Vessels:** Critical for **hydroprocessing units** in refineries (e.g., hydrocrackers, hydrotreaters, hydrodesulfurization reactors) where resistance to high-pressure hydrogen embrittlement and attack is paramount. * **Power Generation:** * **High-Pressure & High-Temperature Boiler Drums and Shells.** * **Steam Separators and Steam Headers.** * **Pressure Vessels** for advanced thermal cycles. * **Petrochemical Industry:** * **Catalytic Reactors** and **Reactor Effluent Air Cooler (REAC)** systems. * **Pressure Vessels** exposed to high-temperature, corrosive process streams containing H₂, H₂S, etc. * **Heat Exchanger & Condenser Shells** for severe service. --- ### **6. Key Features & Advantages** * **Exceptional High-Temperature Strength:** Superior creep rupture strength and long-term thermal stability compared to lower-alloy steels. * **Resistance to Hydrogen Attack (HTHA):** The chromium and molybdenum content allow it to be used in high-pressure hydrogen environments as defined by API RP 941 Nelson Curves. * **Good Weldability & Fabricability:** While it requires strict procedures—including mandatory **pre-heat (typically >150°C/300°F)** and **post-weld heat treatment (PWHT)**—it is a well-characterized and reliably weldable material with established industry practices. * **Toughness:** When properly heat-treated, it offers good fracture toughness for pressure vessel applications. * **Industry Standard:** It is one of the most widely used and trusted materials for critical high-temperature/high-pressure hydrogen service, with an extensive track record and deep engineering knowledge base. --- **In summary, ASTM A387 Grade 22 (2.25Cr-1Mo) is a premium-grade alloy steel plate that is indispensable for the safe and reliable construction of pressure vessels operating under the combined challenges of high temperature, high pressure, and corrosive environments, particularly those involving hydrogen.** -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel, grade 22, Chromium Molybdenum Specification Dimensions Size： Diameter 20-1000 mm Length <7012 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 22, Chromium Molybdenum Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A387 Alloy Steel Powder, grade 22, Chromium Molybdenum Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A387 Alloy Steel Powder, grade 22, Chromium Molybdenum -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A387 Alloy Steel Spherical Powder, grade 22, Chromium Molybdenum -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A387 Alloy Steel Spherical Powder, grade 22, Chromium Molybdenum -:- For detailed product information, please contact sales. -:

Packing of ASTM A387 Alloy Steel Spherical Powder, grade 22, Chromium Molybdenum -:- 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 3483 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