ASTM A131 Steel Tube,Pipe, Grade CS

ASTM A131 Steel Tube, Grade CS Product Information -:- For detailed product information, please contact sales. -: ASTM A131 Steel Tube, Grade CS Synonyms -:- For detailed product information, please contact sales. -:

ASTM A131 Steel, Grade CS Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A131 Grade CS Steel** **ASTM A131 Grade CS** is a carbon steel plate specifically designed for shipbuilding applications, offering reliable performance for general marine structural components. As part of the ASTM A131 specification for "Structural Steel for Ships," this grade provides balanced mechanical properties and good fabrication characteristics for non-critical ship structures where high impact toughness is not the primary requirement. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A131/A131M** - "Standard Specification for Structural Steel for Ships" **Grade Classification:** - **Grade CS** - Carbon steel for general shipbuilding applications - Other grades in A131 series: A, B, D, DS, E, AH32, AH36, DH32, DH36, EH32, EH36 **International Equivalents:** - **EN 10025-2**: S235JR - **JIS G3106**: SM400 - **ABS Rules**: CS (American Bureau of Shipping) - **LR Standards**: Grade A (Lloyd's Register) --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A131 Grade CS: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.23 | | Manganese (Mn) | 0.60-0.90 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.035 | | Silicon (Si) | 0.35 | | Copper (Cu) | 0.35 (optional) | **Key Composition Features:** - **Standard Carbon Steel Chemistry**: Simple and cost-effective composition - **Balanced Manganese**: Provides adequate strength and toughness - **Controlled Impurities**: Standard phosphorus and sulfur limits - **Optional Copper**: Available for improved corrosion resistance --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (for thicknesses ≤ 50 mm):** | Property | Value | |---|---| | **Tensile Strength** | 400-490 MPa (58-71 ksi) | | **Yield Strength (min.)** | 235 MPa (34 ksi) | | **Elongation in 2" (min.)** | 22% | | **Elongation in 8" (min.)** | 24% | **Impact Properties:** - **Charpy V-Notch Testing**: Not required unless specified - **Typical Test Temperature**: +20°C (+68°F) when specified - **Typical Impact Energy**: 27 J (20 ft-lbf) minimum when tested **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Poisson's Ratio**: 0.29 - **Thermal Conductivity**: 51.9 W/m·K - **Coefficient of Thermal Expansion**: 11.7 × 10⁻⁶/°C --- #### **4. Product Applications** **General Shipbuilding:** - Secondary hull structures - Non-critical bulkheads - Interior deck plating - Superstructure components **Marine Applications:** - Accommodation spaces - Storage compartment structures - Machinery space non-critical components - Passageway and stairway structures **Port and Harbor Structures:** - Dock facilities - Pier components - Marine railway structures - Small craft harbor facilities **Ancillary Marine Structures:** - Shipyard service structures - Marine workshop components - Floating dock accessories - Small boat construction --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: All standard processes applicable - **Minimal Preheat**: Generally not required for thicknesses ≤ 25 mm - **Recommended Processes**: SMAW, GMAW, FCAW - **Filler Metals**: E6013, E7018 or equivalent **Forming & Cutting:** - **Good Formability**: Suitable for most shipyard forming operations - **Cold Bending**: Excellent capability with standard equipment - **Cutting Methods**: All standard methods applicable - **Edge Preparation**: Straightforward for welding **Corrosion Considerations:** - **Standard Protection**: Requires standard marine coating systems - **Maintenance**: Regular inspection and maintenance recommended - **Service Life**: Adequate with proper corrosion management **Quality Assurance:** - **Standard Testing**: Tensile tests from each heat - **Chemical Analysis**: Heat certification required - **Visual Inspection**: Standard quality requirements - **Certification**: Standard mill certification --- ### **Technical Summary** ASTM A131 Grade CS represents a cost-effective carbon steel solution for general shipbuilding applications where high impact toughness is not a critical requirement. This grade provides reliable performance for secondary marine structures and non-critical components, offering an economical alternative to the higher-strength and toughness-graded steels in the A131 specification. The simple carbon steel chemistry ensures excellent fabricability, making Grade CS particularly suitable for applications involving extensive forming, welding, and general fabrication. The material's balanced mechanical properties provide adequate strength for most general marine applications while maintaining good ductility and formability characteristics. While not intended for primary hull structures or critical applications subject to dynamic loading, Grade CS serves an important role in ship construction for interior structures, superstructures, and secondary components where weight optimization and extreme toughness are not primary design considerations. The material's proven performance in marine service, combined with its economical nature and excellent fabrication characteristics, makes it a valuable choice for shipbuilders seeking cost-effective solutions for non-critical marine structures. The compliance with major classification society requirements for general shipbuilding applications ensures that ASTM A131 Grade CS meets the necessary quality standards for marine service while providing an economical option for appropriate applications within vessel construction. -:- For detailed product information, please contact sales. -: ASTM A131 Steel, Grade CS Specification Dimensions Size： Diameter 20-1000 mm Length <4327 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 A131 Steel, Grade CS Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A131 Steel Tube, Grade CS -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A131 Steel Tube, Grade CS -:- For detailed product information, please contact sales. -:

Packing of ASTM A131 Steel Tube, Grade CS -:- 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 Tube 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 798 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