Spherical ASTM A242 Steel Powder, type 1

ASTM A242 Steel Spherical Powder, type 1, 19 mm thick Product Information -:- For detailed product information, please contact sales. -: ASTM A242 Steel Spherical Powder, type 1, 19 mm thick Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A242 Steel Powder, type 1 characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A242 Steel Powder, type 1 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 A242 Steel Powder, type 1 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 A242 Steel Powder, type 1 Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A242 Steel, type 1, 19 mm thick Product Information -:- For detailed product information, please contact sales. -: ## **ASTM A242 Type 1 High-Strength Low-Alloy (HSLA) Steel - 19 mm (3/4 inch) Thick Plate** ### **1. Product Overview** **ASTM A242 Type 1** is a **high-strength low-alloy (HSLA) structural steel** specifically formulated for **applications requiring enhanced atmospheric corrosion resistance**. For plates in the 19 mm (approximately 3/4 inch) thickness range, this material provides an optimal balance of **mechanical properties, weldability, and weathering characteristics**. Often referred to as "weathering steel," it forms a dense, adherent protective rust layer (patina) when exposed to atmospheric conditions, eliminating the need for painting in many environments while offering superior strength-to-weight ratios compared to traditional carbon structural steels. The 19 mm thickness represents a versatile mid-range dimension suitable for a wide array of structural applications, offering sufficient rigidity for many load-bearing purposes while remaining fabricable with standard shop equipment. ### **2. Key International Standards & Specifications** | Standard System | Equivalent Designation | Notes | |-----------------|------------------------|-------| | **ASTM/ASME** | **ASTM A242/A242M** | Primary specification, Type 1 designates chemistry requirements | | **AISC** | **A242 Steel** | Recognized by American Institute of Steel Construction | | **European (EN)** | **EN 10025-5: S355J0WP** or **S355J2WP** | Similar weathering steel grades with 355 MPa minimum yield | | **Japanese (JIS)** | **JIS G3114 SMA 400AW** or **SMA 400AP** | Weathering steel for welded structures | | **International** | **ISO 4952: E355CWP** | Weathering steel for construction | | **British** | **BS 4360 Grade 50B** | Older designation, largely superseded | | **Proprietary Equivalents:** Corten A (US Steel), Mayari R (formerly Bethlehem Steel) | **Classification Society Approvals:** Widely accepted for structural applications; marine approvals may require supplementary requirements. ### **3. Chemical Composition (% by Weight) - For 19 mm Plate** The composition is optimized to achieve the characteristic weathering properties through formation of a protective patina. Key alloying elements include copper, chromium, and nickel. | Element | ASTM A242 Type 1 Requirements (Typical) | Role in Weathering & Metallurgy | |---------|------------------------------------------|----------------------------------| | **Carbon (C)** | ≤ 0.15% | Controlled for weldability and toughness in 19 mm section | | **Manganese (Mn)** | ≤ 1.00% | Contributes to strength without compromising corrosion resistance | | **Phosphorus (P)** | 0.04-0.10% | **Elevated intentionally** - enhances atmospheric corrosion resistance | | **Sulfur (S)** | ≤ 0.05% | Kept low for improved weldability and transverse properties | | **Silicon (Si)** | 0.25-0.75% | Deoxidizer, strengthens ferrite, aids patina formation | | **Copper (Cu)** | **0.25-0.40%** | **Essential element** - primary contributor to corrosion resistance | | **Chromium (Cr)** | **0.50-0.70%** | Enhances atmospheric corrosion resistance, stabilizes protective layer | | **Nickel (Ni)** | **0.25-0.50%** | Improves toughness and corrosion resistance, especially in combination with Cu | | **Vanadium (V)** | ≤ 0.10% (optional) | May be added for grain refinement and precipitation strengthening | | **Nitrogen (N)** | ≤ 0.015% | Controlled to prevent aging embrittlement | **Key Composition Notes for 19 mm Thickness:** - **Carbon Equivalent (CE):** Typically 0.35-0.45% (IIW formula), ensuring good weldability without preheat in most 19 mm applications - **Patina Formation:** Cu-Cr-P-Ni synergy creates dense, adherent rust layer that inhibits further corrosion - **Corrosion Resistance:** Approximately 4-6 times better than carbon steel in rural atmospheres, 2-4 times better in industrial environments ### **4. Mechanical & Physical Properties - 19 mm Thick Plate** #### **4.1 Tensile Properties (As-Rolled or Normalized Condition)** | Property | Minimum Requirement | Typical Range (19 mm plate) | Test Standard | |----------|---------------------|------------------------------|---------------| | **Yield Strength (0.2% offset)** | **50 ksi (345 MPa)** | 50-60 ksi (345-415 MPa) | ASTM A370 | | **Tensile Strength** | **70 ksi (485 MPa)** | 70-85 ksi (485-585 MPa) | ASTM A370 | | **Elongation (in 8" / 200 mm gauge)** | **18%** (21% in 2") | 20-25% | ASTM A370 | | **Yield-to-Tensile Ratio** | Not specified | 0.65-0.75 typical | - | **Note for 19 mm thickness:** Mechanical properties are typically achieved in the as-rolled condition, but normalization may be specified for certain applications requiring more uniform properties or stress relief. #### **4.2 Toughness Properties (19 mm thickness)** | Condition | Charpy V-Notch Energy (Typical) | Test Temperature | Notes for 19 mm Plate | |-----------|----------------------------------|------------------|------------------------| | **As-Rolled** | 40-60 ft-lb (54-81 J) | +68°F (+20°C) | Good toughness for structural applications | | **As-Rolled** | 20-40 ft-lb (27-54 J) | -20°F (-29°C) | Often meets -20°F requirements without normalization | | **Normalized** | 50-70 ft-lb (68-95 J) | +68°F (+20°C) | Improved toughness when normalized | #### **4.3 Physical Properties** | Property | Value | Conditions | Notes for 19 mm Plate | |----------|-------|------------|------------------------| | **Density** | 7.85 g/cm³ | Room temperature | Same as carbon steel | | **Modulus of Elasticity** | 29,000 ksi (200 GPa) | 20°C (68°F) | Similar to other structural steels | | **Poisson's Ratio** | 0.29 | - | - | | **Coefficient of Thermal Expansion** | 11.5 × 10⁻⁶/°C | 20-100°C | - | | **Thermal Conductivity** | 47 W/m·K | 20°C | Slightly lower than carbon steel | | **Electrical Resistivity** | 0.23 μΩ·m | 20°C | Higher than carbon steel due to alloying | #### **4.4 Corrosion Performance (19 mm Section)** - **Atmospheric Corrosion Rate:** 0.002-0.004 inches/year in industrial atmospheres (vs. 0.010-0.015 for carbon steel) - **Patina Development:** Typically stabilizes within 3-6 years of exposure - **Design Allowance:** Often no corrosion allowance needed in exposed applications - **Performance in 19 mm:** Adequate section loss allowance due to higher strength ### **5. Processing & Condition - 19 mm Plate** **Standard Delivery Conditions:** 1. **As-Rolled (AR):** Most common for 19 mm thickness - Provides adequate properties for majority of applications - Most cost-effective delivery condition 2. **Normalized (N):** When specified - Improves toughness uniformity - May be required for certain low-temperature applications - Refines grain structure (ASTM 7-9 typical) **Surface Characteristics:** - **Mill Scale:** Typically present on as-rolled material - **Surface Preparation:** May be supplied blasted or pickled if specified - **Patina Development:** Begins immediately upon atmospheric exposure ### **6. Product Applications for 19 mm Plate** #### **6.1 Primary Industries & Applications** | Industry | Specific Applications for 19 mm Plate | Why A242 Type 1 is Suitable | |----------|----------------------------------------|------------------------------| | **Architecture & Construction** | - Building façade panels
- Architectural screens and sunshades
- Decorative structural elements | Aesthetic patina, no painting required, structural capability | | **Bridge Construction** | - Girder webs and flanges
- Bracing members
- Ornamental bridge elements | High strength-to-weight, corrosion resistance reduces maintenance | | **Transportation** | - Truck and trailer structural members
- Railway wagon components
- Container corner posts | Durability in outdoor exposure, weight savings | | **Industrial Structures** | - Outdoor platform flooring
- Cable tray supports
- Pipe rack beams | Long-term corrosion resistance in industrial atmospheres | | **Art & Sculpture** | - Large outdoor sculptures
- Architectural art installations | Natural evolving appearance, structural integrity | #### **6.2 Special Considerations for 19 mm Applications** - **Fabrication:** Easily sheared, punched, and formed with standard equipment - **Welding:** Good weldability with proper procedures - **Connection:** Compatible with bolting and riveting - **Finishing:** Often left unpainted; if painted, requires special surface preparation ### **7. Fabrication Characteristics - 19 mm Thickness** #### **7.1 Weldability** **Weldability Rating:** **Very Good** for 19 mm thickness | Parameter | Recommendations for 19 mm Plate | |-----------|----------------------------------| | **Carbon Equivalent (CE)** | 0.38-0.45% (IIW formula) - favorable for welding | | **Preheat Requirements** | Generally not required for 19 mm thickness unless ambient < 32°F (0°C) | | **Recommended Processes** | SMAW (E7018), GMAW, FCAW, SAW | | **Consumable Selection** | AWS A5.1 E7018 or weathering steel matching electrodes | | **Post-Weld Considerations** | Heat input control to preserve corrosion resistance in HAZ | #### **7.2 Forming & Machining (19 mm thickness)** | Operation | Suitability & Recommendations | |-----------|-------------------------------| | **Cold Forming** | **Excellent** - minimum bend radius ~2× thickness | | **Hot Forming** | Possible but may affect corrosion properties if heated above 1200°F (650°C) | | **Shearing & Punching** | **Very Good** - similar to carbon steel of same strength | | **Machining** | **Good** - slightly tougher than carbon steel, use positive rake tools | | **Thermal Cutting** | Plasma, laser, oxy-fuel all suitable | ### **8. Comparative Analysis** #### **8.1 Versus Other Structural Steels (19 mm thickness)** | Aspect | A242 Type 1 (19 mm) | A36 (19 mm) | A572 Gr. 50 (19 mm) | |--------|----------------------|-------------|---------------------| | **Minimum Yield** | 50 ksi | 36 ksi | 50 ksi | | **Corrosion Resistance** | **4-6× better** | Baseline | Similar to A36 | | **Typical Cost Premium** | 20-40% | Baseline | 10-20% | | **Maintenance Requirements** | **Minimal (often no paint)** | Regular painting | Regular painting | | **Aesthetic Value** | **Natural patina** | Painted appearance | Painted appearance | #### **8.2 Versus Other Weathering Steels** | Grade | Cu Content | Min Yield (19 mm) | Typical Use for 19 mm Plate | |-------|------------|-------------------|-----------------------------| | **A242 Type 1** | 0.25-0.40% | 50 ksi | General structural weathering applications | | **A588 Grade A** | 0.25-0.40% | 50 ksi | Similar applications, slightly different chemistry | | **Corten A** | 0.25-0.55% | 50 ksi | Proprietary equivalent, architectural preference | | **EN 10025-5 S355J2W** | ≥ 0.30% | 355 MPa (51 ksi) | European equivalent | ### **9. Technical Advantages for 19 mm Plate** #### **9.1 Key Benefits at This Thickness** 1. **Optimal Strength-to-Weight:** 50 ksi yield allows lighter structures than A36 2. **Excellent Fabricability:** 19 mm is ideal for most forming and welding operations 3. **Weathering Performance:** Sufficient thickness for long-term durability 4. **Economic Balance:** Thinner than heavy plate but substantial enough for structural use 5. **Versatile Applications:** Suitable for both structural and architectural uses #### **9.2 Lifecycle Advantages** - **Reduced Maintenance:** Elimination of painting cycles - **Longer Service Life:** In suitable environments - **Sustainability:** No paint-related environmental issues - **Aesthetic Appeal:** Natural aging appearance valued in architecture ### **10. Design Considerations for 19 mm Plate** #### **10.1 Optimal Applications** - **Exposed structural elements** where appearance matters - **Bridge components** in moderate environments - **Architectural features** requiring structural capability - **Transportation equipment** exposed to weather #### **10.2 Limitations & Precautions** - **Not suitable** for continuous immersion or saltwater splash zones - **Staining:** Runoff may discolor adjacent materials during early patina formation - **Design detailing:** Must allow moisture drainage to prevent ponding - **Chemical environments:** May not perform well in highly acidic or alkaline conditions ### **11. Quality Assurance for 19 mm Plate** #### **11.1 Standard Testing** 1. **Chemical Analysis:** Heat and product analysis 2. **Tensile Testing:** One test per plate or 50 tons 3. **Bend Testing:** When specified for ductility verification #### **11.2 Special Considerations** - **Corrosion Testing:** Not typically required but can be specified - **Surface Quality:** Important for exposed applications - **Dimensional Tolerances:** Per ASTM A6 for plates ### **12. Procurement & Specification** #### **12.1 Ordering 19 mm A242 Type 1 Plate** Specify clearly: - **ASTM A242/A242M Type 1** - **Thickness:** 19 mm (or 3/4 inch) - **Condition:** As-rolled or normalized - **Supplementary requirements** if any - **Surface preparation** if required #### **12.2 Availability** - **Lead Time:** 4-8 weeks typically - **Standard Sizes:** Typically available in widths up to 150 inches - **Quantity:** Available from stock or mill production ### **13. Case Studies - 19 mm Applications** #### **13.1 Architectural Façade System** **Project:** Corporate headquarters building **Application:** 19 mm thick A242 façade panels **Benefits Realized:** - No painting required over building lifetime - Natural color variation appreciated aesthetically - Structural capability allowed integration with support system - 20-year maintenance cost reduction estimated at 60% #### **13.2 Pedestrian Bridge** **Location:** Urban park setting **Use:** 19 mm plate for decking and rail supports **Performance:** - Blended naturally with park environment - Required only inspection, no repainting - Withstood urban atmospheric conditions - Provided necessary structural strength ### **14. Industry Trends for 19 mm Weathering Steel** #### **14.1 Growing Applications** - **Sustainable Construction:** LEED and green building projects - **Infrastructure Renewal:** Bridge and transportation projects - **Architectural Innovation:** Creative uses in modern design - **Industrial Design:** Functional aesthetic in equipment design #### **14.2 Technical Developments** - **Improved Processing:** Better consistency in patina development - **Fabrication Advances:** Laser cutting for intricate architectural patterns - **Coating Systems:** Clear coatings to stabilize patina appearance - **Digital Fabrication:** CNC machining for complex shapes ### **15. Conclusion** **ASTM A242 Type 1 in 19 mm thickness** represents a **versatile, high-performance material choice** for applications requiring **both structural capability and atmospheric corrosion resistance**. Its balanced properties make it particularly suitable for: **Key Advantages at 19 mm Thickness:** 1. **Structural Efficiency:** 50 ksi minimum yield enables weight savings 2. **Weathering Performance:** Protective patina eliminates painting in suitable environments 3. **Fabrication Friendliness:** Ideal thickness for most forming and welding operations 4. **Aesthetic Value:** Natural appearance valued in architectural applications 5. **Lifecycle Economy:** Reduced maintenance costs over service life **Ideal Application Scenarios for 19 mm Plate:** - Architectural features requiring structural support - Exposed bridge and structure components - Transportation equipment subjected to weather - Industrial structures in moderate environments **Important Implementation Considerations:** - Proper design to ensure drainage and prevent moisture trapping - Understanding of patina development process and potential staining - Appropriate fabrication practices to preserve corrosion resistance - Environmental suitability assessment before specification The 19 mm thickness represents a **"sweet spot"** in the application of weathering steel—thick enough to provide substantial structural capacity and corrosion allowance, yet thin enough to remain economical and easily fabricated. Its continued popularity in both structural and architectural applications demonstrates its **enduring value** as a material that successfully combines **technical performance with aesthetic appeal**. For engineers and architects seeking a **maintenance-reducing, structurally capable material** for exposed applications, A242 Type 1 in 19 mm thickness offers a **proven, code-approved solution** with a track record of successful performance across decades of use in diverse applications worldwide. -:- For detailed product information, please contact sales. -: ASTM A242 Steel, type 1, 19 mm thick Specification Dimensions Size： Diameter 20-1000 mm Length <5981 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. -:

Spherical ASTM A242 Steel Powder, type 1 Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A242 Steel Powder, type 1 -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A242 Steel Spherical Powder, type 1, 19 mm thick -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A242 Steel Spherical Powder, type 1, 19 mm thick -:- For detailed product information, please contact sales. -:

Packing of ASTM A242 Steel Spherical Powder, 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 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 2452 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