Spherical ASTM A285, Grade B

ASTM A285, Grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A285, Grade B Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A285, Grade B characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A285, Grade B 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 A285, Grade B 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 A285, Grade B Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A285, Grade B Product Information -:- For detailed product information, please contact sales. -: ### **Product Name:** ASTM A285, Grade B **Classification:** Low to Intermediate Tensile Strength Carbon-Silicon Steel Plate for Pressure Vessels --- ### **1. Overview** ASTM A285 Grade B is a standard specification for carbon steel plates of low and intermediate tensile strength, designed primarily for fusion-welded pressure vessels. It represents the middle-tier strength level within the ASTM A285 specification, offering a balanced compromise between strength, cost, and weldability. As a general-purpose material commonly supplied in the as-rolled condition, it is widely used for constructing tanks and vessels that operate under moderate pressures and at ambient to slightly elevated temperatures where notch toughness is not a critical design factor. ### **2. Chemical Composition (Weight %, Heat Analysis)** As specified in ASTM A285/A285M. | Element | Minimum (%) | Maximum (%) | Notes | |---------|------------|------------|-------| | **Carbon (C)** | - | 0.22 | Slightly higher than Grade A for increased strength, but still maintains good weldability. | | **Manganese (Mn)** | - | 0.90 | Standard level for solid solution strengthening. | | **Phosphorus (P)** | - | 0.035 | Impurity control for basic toughness. | | **Sulfur (S)** | - | 0.040 | Impurity control for basic weldability. | | **Silicon (Si)** | 0.13 | 0.15 | A minimum silicon content is required for Grade B, indicating it is typically **fully killed steel**. This provides a more uniform microstructure than semi-killed Grade A. | **Key Chemical Distinction:** The mandatory **minimum Silicon (Si) content (0.13%)** is the primary chemical differentiator from Grade A. This ensures the steel is fully deoxidized (killed), resulting in a more homogeneous structure with fewer porosity issues, which is beneficial for integrity. ### **3. Physical & Mechanical Properties** *Properties are for plates in the as-rolled condition. Thickness range typically up to 2 inches (51 mm).* **Mechanical Properties (Minimum & Typical):** * **Tensile Strength (Rm):** 50,000 psi (345 MPa) min * **Yield Strength (Re, 0.2% offset):** 27,000 psi (185 MPa) min * **Elongation (A, min):** * 8 in. (200 mm) Gauge Length: **23%** * 2 in. (50 mm) Gauge Length: **28%** * **Hardness (typical):** ~ 120-155 HBW **Physical Properties (Typical):** * **Density:** 0.284 lb/in³ (7.85 g/cm³) * **Modulus of Elasticity:** 29 x 10⁶ psi (200 GPa) * **Poisson's Ratio:** 0.29 * **Thermal Conductivity:** ~ 50 W/m·K (at 20°C) * **Coefficient of Thermal Expansion:** ~ 6.5 x 10⁻⁶ /°F (11.7 x 10⁻⁶ /K) **Critical Note – Impact Properties:** **ASTM A285 does not mandate Charpy V-notch impact testing.** Therefore, Grade B is **not suitable for low-temperature service** where risk of brittle fracture exists unless supplementary impact testing is specially ordered and specified. Its use is generally restricted to temperatures above 32°F (0°C). ### **4. Key Characteristics** * **Balanced Performance:** Offers a practical balance of higher strength than Grade A while maintaining good fabricability. * **Improved Homogeneity:** The fully killed nature (due to min. Si) provides a more consistent microstructure with fewer internal discontinuities compared to semi-killed steels, enhancing reliability for pressure containment. * **Good Weldability:** The carbon content remains moderate, ensuring good weldability with common processes. Pre-heat may be recommended for thicker sections. * **Cost-Effective Strength:** Provides a measurable increase in allowable design stress over Grade A without a significant cost premium, allowing for weight savings or higher pressure ratings. * **Formability:** Retains good cold forming and bending characteristics, though slightly less ductile than Grade A due to higher strength. ### **5. Product Applications** ASTM A285 Grade B is a workhorse material for a broad range of industrial pressure equipment operating under moderate conditions: * **Pressure Vessels:** Air receivers, steam drums (low-pressure), heat exchanger shells, and separators in general plant service. * **Storage Tanks:** Field-erected and shop-built tanks for water, fuel oil, and certain non-hazardous chemicals. * **Process Vessels:** Reactors, columns, and scrubbers in chemical, petrochemical, and food processing industries where service conditions are not severe. * **Water & Wastewater Treatment Equipment:** Pressure filters, aeration tanks, and clarifiers. * **Boiler Components:** Non-critical parts in low-pressure boiler systems. ### **6. International Standards & Specifications** ASTM A285 is a globally recognized standard, with Grade B being one of the most commonly specified grades. | Region | Standard & Designation | Scope / Notes | |--------|----------------------|---------------| | **USA / ASTM** | **ASTM A285/A285M** | Standard Specification for Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength. **Grades: A, B, C**. | | **USA / ASME** | **ASME SA-285** | Identical to ASTM A285 when adopted into the ASME Boiler and Pressure Vessel Code for construction. | | **European Union (EU)** | **EN 10028-2** | **P265GH** or **P275GH** are functional equivalents. These are normalized, fully killed steels with specified impact properties, often considered a technical upgrade. | | **International / ISO** | **ISO 9328-2** | Steel grades such as **P265GH** or **P275GH** provide similar strength with enhanced toughness guarantees. | | **Japan** | **JIS G3115 SB 410** | Provides similar tensile strength, though chemical requirements and processing may differ. | ### **7. Available Forms & Processing** * **Standard Forms:** Supplied as **hot-rolled plates**. Common thickness up to 2 in. (51 mm); available in wider and longer sizes for vessel fabrication. * **Condition:** Primarily supplied in the **as-rolled (AR)** condition. Normalizing or stress relieving can be specified as an additional requirement. * **Fabrication:** * **Welding:** Excellent weldability. Standard processes like SMAW (E7018), GMAW, FCAW, and SAW are suitable. Follow qualified Welding Procedure Specifications (WPS). * **Forming:** Well-suited for cold bending and rolling. Hot forming is straightforward. * **Machining:** Good machinability; slightly tougher than Grade A but still easily processed. ### **8. Selection Guidance** **Choose ASTM A285 Grade B when:** * A cost-effective, readily available pressure vessel quality plate is needed. * Design requires higher strength than Grade A but does not justify the cost of notch-tough steels like A516. * Service conditions are ambient to moderately warm (typically above 32°F/0°C) and non-cyclic. * The simplicity of as-rolled supply meets fabrication needs. **Consider an alternative (e.g., ASTM A516 Grade 60/65, EN P275GH) when:** * Service temperatures are at or below 32°F (0°C). * The design code, regulatory authority, or application requires guaranteed impact toughness. * Enhanced reliability through a normalized microstructure is desired for cyclic service. --- **Disclaimer:** This technical summary is for informational purposes. **ASTM A285 Grade B is not intended for low-temperature or critically lethal service.** For engineering design and fabrication, always adhere to the latest edition of the **ASTM A285/A285M** specification, the governing pressure vessel design code (e.g., ASME BPVC Section VIII), and approved fabrication procedures. Mechanical properties are thickness-dependent; always verify for the specific plate thickness being procured. -:- For detailed product information, please contact sales. -: ASTM A285, Grade B Specification Dimensions Size： Diameter 20-1000 mm Length <7385 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 A285, Grade B Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A285, Grade B Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A285, Grade B -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A285, Grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A285, Grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A285, Grade B -:- 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 3856 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