ASTM A242 Steel Sheet,Plate, type 1

ASTM A242 Steel Sheet/Plate, type 1, 19 mm thick Product Information -:- For detailed product information, please contact sales. -: ASTM A242 Steel Sheet/Plate, type 1, 19 mm thick Synonyms -:- For detailed product information, please contact sales. -:

ASTM A242 Steel, type 1, 19 mm thick Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A242 Steel, Type 1 (19 mm thick)** **ASTM A242 Type 1** is a high-strength low-alloy structural steel designed for atmospheric corrosion resistance, offering a minimum yield strength of **345 MPa (50 ksi)** in the **19 mm thickness**. This steel develops enhanced corrosion protection through the formation of a dense, protective oxide patina when exposed to weather, making it particularly suitable for exposed structural applications without protective coatings. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A242/A242M** - "Standard Specification for High-Strength Low-Alloy Structural Steel" **Classification:** - **Type 1** - Copper-phosphorus alloyed for enhanced corrosion resistance - **Type 2** - Alternative chemistry with different corrosion resistance characteristics - **Type 3** - Vanadium or nitrogen treated for different strength levels **International Equivalents:** - **EN 10025-5**: S355J0WP - **JIS G3114**: SMA 400AW - **GB/T 4171**: Q355NH - **ISO 4952**: WR 350 A --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A242 Type 1 (19 mm thick): | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.15 | | Manganese (Mn) | 1.00 | | Phosphorus (P) | 0.15 | | Sulfur (S) | 0.05 | | Silicon (Si) | 0.30 | | Copper (Cu) | 0.20 min | | Chromium (Cr) | 0.50-1.25 | | Nickel (Ni) | 0.50 | **Key Composition Features:** - **Copper-Phosphorus System**: Primary corrosion resistance mechanism - **Chromium Addition**: 0.50-1.25% for enhanced atmospheric resistance - **Controlled Carbon**: Maximum 0.15% for weldability - **Copper Requirement**: Minimum 0.20% for corrosion protection --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (19 mm thickness):** | Property | Value | |---|---| | **Tensile Strength** | 480-620 MPa (70-90 ksi) | | **Yield Strength (min.)** | 345 MPa (50 ksi) | | **Elongation in 2" (min.)** | 18% | | **Elongation in 8" (min.)** | 21% | **Corrosion Resistance Properties:** - **Atmospheric Corrosion Resistance**: 2-4 times better than carbon steel - **Patina Formation**: Develops protective oxide layer over time - **Weathering Characteristics**: Improves with exposure duration **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Thermal Conductivity**: 49.5 W/m·K - **Coefficient of Thermal Expansion**: 11.8 × 10⁻⁶/°C - **Specific Heat Capacity**: 480 J/kg·K --- #### **4. Product Applications** **Architectural Structures:** - Exposed building facades - Architectural features - Bridge exterior components - Monumental structures **Transportation Infrastructure:** - Unpainted bridge components - Highway sign supports - Guard rail systems - Transportation facility structures **Industrial Applications:** - Exposed structural members - Industrial building frames - Material handling structures - Processing plant components **Special Applications:** - Sculptural elements - Landscape architecture - Marine coastal structures - Rural construction --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Good Weldability**: With proper procedure control - **Preheat Requirements**: Generally not required for 19 mm thickness - **Recommended Processes**: SMAW, GMAW, FCAW - **Filler Metals**: E7018, ER70S-6 or weathering steel compatible - **Special Considerations**: Matching weathering characteristics in weld metal **Forming & Cutting:** - **Good Formability**: Suitable for standard structural forming - **Bend Radius**: Typically 2t for 90° bends - **Cutting Methods**: Plasma, laser, oxy-fuel, and shear cutting - **Edge Preparation**: Standard practices applicable **Corrosion Performance:** - **Patina Development**: Requires wet/dry cycling for proper formation - **Initial Staining**: May produce runoff during early exposure - **Maintenance**: Generally requires no painting when properly exposed - **Environmental Suitability**: Best in open atmospheric exposure **Quality Assurance:** - **Mechanical Testing**: Tensile and bend tests required - **Chemical Analysis**: Heat certification mandatory - **Corrosion Testing**: When specified for verification - **Visual Inspection**: Standard quality requirements --- ### **Technical Summary** ASTM A242 Type 1 steel in 19 mm thickness represents an optimal solution for structural applications requiring both high strength and enhanced atmospheric corrosion resistance. The 19 mm thickness provides excellent balance between structural capacity and fabrication flexibility, making it suitable for a wide range of exposed structural components. The copper-phosphorus-chromium alloy system creates a protective patina that significantly improves corrosion resistance compared to conventional carbon steels, typically offering 2-4 times longer service life in atmospheric exposure. This self-protecting characteristic eliminates the need for protective coatings in many applications, reducing long-term maintenance costs. The material's 345 MPa minimum yield strength provides significant weight-saving advantages over conventional structural steels, while maintaining good weldability and formability characteristics. The 19 mm thickness is particularly well-suited for medium-duty structural members, connection plates, and architectural elements where both strength and corrosion performance are important design considerations. ASTM A242 Type 1 has established itself as a preferred material for bridges, architectural structures, and exposed industrial applications where the combination of structural efficiency, aesthetic appeal, and reduced maintenance requirements provide significant lifecycle cost advantages over painted carbon steel structures. -:- For detailed product information, please contact sales. -: ASTM A242 Steel, type 1, 19 mm thick Specification Dimensions Size： Diameter 20-1000 mm Length <4352 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 A242 Steel, type 1, 19 mm thick Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A242 Steel Sheet,Plate, type 1, 19 mm thick -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A242 Steel Sheet,Plate, type 1, 19 mm thick -:- For detailed product information, please contact sales. -:

Packing of ASTM A242 Steel Sheet/Plate, type 1, 19 mm thick -:- 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 823 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