ASTM A299 Carbon Steel Sheet,Plate, Manganese Silicon Alloy

ASTM A299 Carbon Steel Sheet/Plate, Manganese Silicon Alloy Product Information -:- For detailed product information, please contact sales. -: ASTM A299 Carbon Steel Sheet/Plate, Manganese Silicon Alloy Synonyms -:- For detailed product information, please contact sales. -:

ASTM A299 Carbon Steel, Manganese Silicon Alloy Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A299 Carbon Steel, Manganese-Silicon Alloy** **ASTM A299** is a specification for carbon-manganese-silicon steel plates primarily used in pressure vessel applications requiring higher strength than provided by carbon steels. This alloy steel offers improved mechanical properties through manganese-silicon solid solution strengthening, making it suitable for moderate temperature pressure vessel service. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A299/A299M** - "Standard Specification for Pressure Vessel Plates, Carbon-Manganese-Silicon Steel" **Material Characteristics:** - Manganese-silicon strengthened carbon steel - Higher strength than conventional carbon steels - Suitable for moderate temperature service - Good notch toughness properties **International Equivalents:** - **EN 10028-2**: P355GH - **JIS G3115**: SPV 355 - **GB/T 713**: Q345R - **ISO 9328-2**: P355GH --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A299: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.24 | | Manganese (Mn) | 0.90-1.50 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.040 | | Silicon (Si) | 0.15-0.40 | **Key Composition Features:** - **Enhanced Manganese**: 0.90-1.50% for solid solution strengthening - **Silicon Addition**: 0.15-0.40% for deoxidation and strength enhancement - **Controlled Carbon**: Maximum 0.24% for weldability and toughness - **Standard Impurity Control**: Typical phosphorus and sulfur limits --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (for thicknesses ≤ 50 mm):** | Property | Value | |---|---| | **Tensile Strength** | 515-655 MPa (75-95 ksi) | | **Yield Strength (min.)** | 275 MPa (40 ksi) | | **Elongation in 2" (min.)** | 19% | | **Elongation in 8" (min.)** | 22% | **Impact Toughness Properties:** - **Charpy V-Notch Testing**: Typically required at 0°F (-18°C) or as specified - **Minimum Impact Energy**: Usually 20 ft-lbf (27 J) when required - **Good Notch Toughness**: Suitable for pressure vessel applications **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Thermal Conductivity**: 50.5 W/m·K - **Coefficient of Thermal Expansion**: 11.7 × 10⁻⁶/°C - **Specific Heat Capacity**: 485 J/kg·K --- #### **4. Product Applications** **Pressure Vessel Industry:** - Boiler drums and shells - Pressure vessel components - Heat exchanger shells - Storage tanks for elevated temperature service **Power Generation:** - Feedwater heaters - Steam drums - Economizer sections - Power plant pressure components **Chemical Processing:** - Process vessels - Reaction chambers - Distillation columns - Chemical storage equipment **Industrial Applications:** - Industrial boilers - Process industry equipment - Manufacturing pressure vessels - Heavy equipment pressure components --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Good Weldability**: With proper procedure control - **Preheat Requirements**: 150-200°F (65-95°C) recommended for thicker sections - **Post-Weld Heat Treatment**: Stress relieving at 1100-1200°F (595-650°C) - **Recommended Processes**: SMAW, GMAW, FCAW, SAW - **Filler Metals**: E7018, ER70S-6 or equivalent **Forming & Machining:** - **Good Formability**: Suitable for most pressure vessel forming operations - **Machinability**: Fair to good (approximately 60% of B1112 steel) - **Cutting Methods**: Plasma, oxy-fuel, and mechanical cutting suitable - **Bend Performance**: Good for pressure vessel fabrication **Heat Treatment:** - Typically supplied in as-rolled or normalized condition - Normalizing temperature: 1600-1700°F (870-925°C) - Optional stress relieving available - Good response to thermal processing **Quality Assurance:** - **Mandatory Testing**: Tensile and chemical analysis - **Impact Testing**: When specified by purchaser - **Non-Destructive Testing**: As required by application - **Certification**: Full mill certification provided --- ### **Technical Summary** ASTM A299 carbon-manganese-silicon steel represents an economical intermediate-strength material for pressure vessel applications requiring better mechanical properties than conventional carbon steels. The manganese-silicon alloy system provides effective solid solution strengthening, delivering a minimum yield strength of 40 ksi (275 MPa) while maintaining good fabrication characteristics. This steel fills an important position in pressure vessel material selection, offering approximately 15-20% higher strength than carbon steels like A516 Grade 60, while remaining more economical than low-alloy steels. The balanced chemistry ensures good weldability and formability, making it suitable for a wide range of pressure vessel fabrication requirements. The material's reliable performance at moderate temperatures and its good notch toughness characteristics have established ASTM A299 as a preferred choice for boiler drums, pressure vessels, and other pressure-containing components in power generation, chemical processing, and industrial applications. The consistent quality and proven service history make it a trusted material for engineers designing pressure equipment where both performance and cost-effectiveness are important considerations. -:- For detailed product information, please contact sales. -: ASTM A299 Carbon Steel, Manganese Silicon Alloy Specification Dimensions Size： Diameter 20-1000 mm Length <4353 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 A299 Carbon Steel, Manganese Silicon Alloy Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A299 Carbon Steel Sheet,Plate, Manganese Silicon Alloy -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A299 Carbon Steel Sheet,Plate, Manganese Silicon Alloy -:- For detailed product information, please contact sales. -:

Packing of ASTM A299 Carbon Steel Sheet/Plate, Manganese Silicon Alloy -:- 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 Sheet/Plate 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 824 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