ASTM A537 Carbon Steel Rod/Bar, Class 2

ASTM A537 Carbon Steel Rod, Class 2 Product Information -:- For detailed product information, please contact sales. -: ASTM A537 Carbon Steel Rod, Class 2 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A537 Carbon Steel, Class 2 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A537 Class 2: Heat-Treated Carbon-Manganese-Silicon Steel Plate** #### **1. Overview** ASTM A537 Class 2 is a **heat-treated carbon-manganese-silicon steel plate** designed for pressure vessel applications requiring **enhanced strength and toughness** compared to conventional carbon steels. This specification covers steel plates that have been **normalized or quenched and tempered** to achieve superior mechanical properties, making them suitable for intermediate and low-temperature service where improved notch toughness is essential. #### **2. Chemical Composition** The chemical composition is carefully balanced to achieve optimal properties after heat treatment: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.24 max | | Manganese (Mn) | 0.70 - 1.60 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.15 - 0.50 | | Copper (Cu) | 0.35 max (when specified) | **Key Composition Features:** - **Controlled Carbon Content**: Balances strength and weldability - **Elevated Manganese Range**: Enhances hardenability and strength - **Silicon Addition**: Provides deoxidation and solid solution strengthening - **Low Impurity Levels**: Ensure good toughness and fabricability #### **3. Physical & Mechanical Properties** **Mechanical Properties (Heat-Treated Condition):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 70 - 90 ksi (485 - 620 MPa) | | **Yield Strength** | 50 ksi min (345 MPa min) | | **Elongation in 2 inches** | 22% min | | **Charpy V-Notch Impact** | 25 ft-lb min at -60°F (-51°C) | **Thickness Capability:** - **Maximum thickness**: 4 inches (100 mm) for normalized treatment - **Maximum thickness**: 6 inches (150 mm) for quenched and tempered - **Property adjustment**: Required for thicknesses over 1½ inches (40 mm) **Physical Properties (Typical):** - **Density**: 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity**: 29,000 ksi (200 GPa) - **Poisson's Ratio**: 0.29 - **Thermal Expansion Coefficient**: 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) #### **4. Product Applications** ASTM A537 Class 2 is widely used in pressure vessel and structural applications: **Pressure Vessel Construction:** - Storage tanks for liquefied gases - Chemical process vessels - Heat exchangers and condensers - Industrial boilers and pressure containers **Structural Applications:** - Offshore platform components - Heavy construction equipment - Mining and material handling equipment - Bridge components and support structures **Low-Temperature Service:** - Refrigerated storage vessels - Cryogenic service applications - Cold climate structural components - Low-temperature process equipment #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | P460NH | Similar normalized high-strength steel | | **Europe** | **EN 10028-3** | P460NH | Normalized high-strength pressure vessel steel | | **Japan** | **JIS G3115** | SPV 450 | Similar pressure vessel steel grade | | **China** | **GB 19189** | 14Cr1MoR | Pressure vessel steel with similar applications | **Heat Treatment Comparison:** | Treatment | Tensile Strength | Yield Strength | Impact Properties | |-----------|------------------|----------------|-------------------| | **Normalized** | 70-90 ksi | 50 ksi min | Good toughness | | **Q&T** | 70-90 ksi | 50 ksi min | Enhanced toughness | #### **6. Fabrication & Quality Assurance** **Welding Characteristics:** - **Good weldability** with proper procedures - **Pre-heat recommended** for thicknesses over ¾ inch (19 mm) - **Low-hydrogen electrodes** required for critical applications - **Post-weld heat treatment** often specified for stress relief **Heat Treatment Options:** - **Normalizing**: For thicknesses up to 4 inches - **Quenching and Tempering**: For enhanced toughness in thicker sections - **Stress Relieving**: As required by fabrication sequence **Quality Control Requirements:** - **Impact testing** mandatory at specified temperatures - **Tension tests** from each heat and heat treatment charge - **Ultrasonic testing** available as supplementary requirement - **Chemical analysis** for each heat of steel --- **Key Advantages:** - **Superior toughness** compared to non-heat-treated carbon steels - **Good strength-to-weight ratio** - **Excellent fabricability** and weldability - **Cost-effective** for intermediate strength applications **Design Considerations:** - **Minimum design metal temperature** considerations - **Proper heat treatment selection** based on thickness and application - **Fabrication sequence planning** for heat-treated materials - **Quality verification** through comprehensive testing **Disclaimer:** This information is for reference purposes only. For pressure vessel applications, consult the latest ASTM A537 specification and applicable construction codes (ASME Section VIII). Material selection and fabrication should be verified by qualified engineers familiar with pressure vessel requirements. -:- For detailed product information, please contact sales. -: ASTM A537 Carbon Steel, Class 2 Specification Dimensions Size： Diameter 20-1000 mm Length <4435 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 A537 Carbon Steel, Class 2 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A537 Carbon Steel Rod, Class 2 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A537 Carbon Steel Rod, Class 2 -:- For detailed product information, please contact sales. -:

Packing of ASTM A537 Carbon Steel Rod, Class 2 -:- 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 Rod 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 906 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