Spherical ASTM A202 Low Alloy Steel Powder, Grade A

ASTM A202 Low Alloy Steel Spherical Powder, Grade A Product Information -:- For detailed product information, please contact sales. -: ASTM A202 Low Alloy Steel Spherical Powder, Grade A Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A202 Low Alloy Steel Powder, Grade A characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A202 Low Alloy Steel Powder, Grade A 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 A202 Low Alloy Steel Powder, Grade A 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 A202 Low Alloy Steel Powder, Grade A Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A202 Low Alloy Steel, Grade A Product Information -:- For detailed product information, please contact sales. -: ## **Product Overview: ASTM A202 Grade A Low-Alloy Structural Steel Plate** ASTM A202 Grade A is a **silicon-manganese alloy steel** specifically designed for **pressure vessel applications** requiring enhanced mechanical properties at elevated temperatures. It belongs to the ASTM A202 / A202M standard (*Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Manganese-Silicon*). The key characteristic of this grade is its combination of **higher strength and improved atmospheric corrosion resistance** compared to standard carbon steels, achieved through a balanced addition of chromium, manganese, and silicon. It is primarily supplied in the **normalized heat treatment condition** to ensure optimal grain structure and property uniformity. ## **Key International Standards & Specifications** * **Primary Standard:** **ASTM A202 / A202M** - Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Manganese-Silicon. * **Related/Comparative Standards:** * **ASME SA-202:** The ASME Boiler and Pressure Vessel Code adoption of ASTM A202. Plates conforming to ASTM A202 are typically acceptable for ASME Code construction when ordered to SA-202. * **EN 10028-2:** The European standard for pressure vessel steels. While there is no direct equivalent, grades like **P355GH** may share some application overlap in terms of strength and pressure service, but the chemical composition differs significantly. * **JIS G3119:** Japanese standard for firebox and pressure vessel steel plates (e.g., **SB480**). ## **Chemical Composition (% by Weight, ASTM A202 Gr. A)** | Element | Composition Range (Maximum or Specified, %) | Role in the Alloy | | :--- | :--- | :--- | | **Carbon (C)** | 0.15 - 0.21 | Provides foundational strength and hardenability. | | **Manganese (Mn)** | 1.20 - 1.60 | A primary strengthening element; increases hardenability and contributes to tensile strength. Works in synergy with silicon. | | **Phosphorus (P)** | 0.035 max | Residual impurity; kept low to prevent embrittlement. | | **Sulfur (S)** | 0.040 max | Residual impurity; kept low to improve hot workability and toughness. | | **Silicon (Si)** | 0.50 - 0.80 | A primary alloying element. Provides solid solution strengthening, increases yield strength, and significantly improves resistance to oxidation and scaling at elevated temperatures. | | **Chromium (Cr)** | 0.40 - 0.65 | Enhances atmospheric corrosion resistance, improves hardenability, and contributes to high-temperature strength. | | **Nickel (Ni)** | 0.25 max (if present) | Residual; may improve toughness. | | **Copper (Cu)** | 0.35 max (when specified) | Can be specified to further enhance atmospheric corrosion resistance. | *(Note: Ranges are typical for plates up to 4 inches [100 mm] thick. Specific limits may vary slightly with thickness.)* ## **Physical & Mechanical Properties** ASTM A202 Grade A is typically supplied in the **normalized condition**. Properties are guaranteed in the as-delivered heat-treated state. | Property | Requirement (Typical for Thickness ≤ 2.5 in. [65 mm]) | Test Standard / Condition | | :--- | :--- | :--- | | **Yield Strength (Min)** | **50 ksi (345 MPa)** | ASTM A370 | | **Tensile Strength** | **75 - 95 ksi (515 - 655 MPa)** | ASTM A370 | | **Elongation (Min)** | **18%** (in 8-in. gauge length) | ASTM A370 | | **Charpy V-Notch Impact** | Not a mandatory requirement in the base specification. **Must be specified by the purchaser** if required, including test temperature and energy absorption values. | ASTM A370 (if specified) | | **Heat Treatment** | **Normalized** | The plates are heated to above the austenitizing temperature and cooled in still air. This refines the grain structure and ensures consistent properties. | | **Approx. Density** | 7.85 g/cm³ (0.284 lb/in³) | - | | **Modulus of Elasticity** | 29,000 ksi (200 GPa) | - | ## **Product Forms & Primary Applications** * **Product Form:** Exclusively supplied as **rolled steel plates**. * **Primary Applications:** * **Pressure Vessels:** For the construction of welded boilers, heat exchangers, and pressure vessels operating at **moderate to elevated temperatures** (typically up to ~450°C / 850°F). Its scaling resistance is a key benefit. * **High-Temperature Service Components:** Used in applications where both strength and oxidation resistance at sustained temperatures are needed, such as in certain fossil fuel power generation components. * **Structural Applications Requiring Corrosion Resistance:** For industrial structures exposed to mildly corrosive atmospheres where its enhanced Cr-Si-Mn composition offers longer service life than carbon steel. * **Storage Tanks:** For critical storage tanks containing corrosive media or operating under pressure. ## **Key Advantages & Considerations** * **Advantages:** 1. **Higher Strength:** Offers significantly higher yield and tensile strength than common carbon steel pressure vessel plates like ASTM A516 Gr. 70. 2. **Improved Scaling Resistance:** The silicon and chromium content provides better resistance to oxidation and scaling in hot service compared to plain C-Mn steels. 3. **Good Weldability:** Despite its alloy content, it exhibits good weldability with standard procedures, though preheat and control of heat input are often recommended, especially for thicker sections. 4. **Atmospheric Corrosion Resistance:** Offers approximately twice the atmospheric corrosion resistance of standard carbon steel. * **Important Considerations:** 1. **Notch Toughness:** Impact testing is **not routine** for this grade. For low-temperature service or critical applications, Charpy V-notch requirements **must be explicitly specified** in the purchase order. 2. **Heat Treatment Dependent:** Properties are guaranteed only in the normalized condition. Any subsequent hot forming or welding must consider its effect on the heat-treated microstructure. 3. **Grade Selection:** Engineers must evaluate if the enhanced high-temperature properties of A202 are necessary versus more common and readily available grades like A516, which may have better guaranteed toughness. ## **Conclusion** **ASTM A202 Grade A** is a specialized **chromium-manganese-silicon alloy steel plate** engineered for demanding pressure vessel and high-temperature applications. Its value lies in its **superior strength and inherent resistance to oxidation and atmospheric corrosion**, filling a specific niche between carbon steels and higher-alloy chromium-molybdenum steels. Successful application requires careful specification, including potential impact test requirements, and adherence to proper fabrication and welding guidelines to preserve its designed properties. -:- For detailed product information, please contact sales. -: ASTM A202 Low Alloy Steel, Grade A Specification Dimensions Size： Diameter 20-1000 mm Length <5969 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 A202 Low Alloy Steel, Grade A Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A202 Low Alloy Steel Powder, Grade A Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A202 Low Alloy Steel Powder, Grade A -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A202 Low Alloy Steel Spherical Powder, Grade A -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A202 Low Alloy Steel Spherical Powder, Grade A -:- For detailed product information, please contact sales. -:

Packing of ASTM A202 Low Alloy Steel Spherical Powder, Grade A -:- 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 2440 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