UNS F33800 Cast Iron Tube,Pipe,UNS F33800 Cast Iron Tube,Pipe

UNS F33800 Cast Iron Tube Product Information -:- For detailed product information, please contact sales. -: UNS F33800 Cast Iron Tube Synonyms -:- For detailed product information, please contact sales. -:

UNS F33800 Cast Iron Product Information -:- For detailed product information, please contact sales. -: ## **UNS F33800 Cast Iron - Technical Specification** ### **1. Product Overview** **UNS F33800** is a standardized designation in the Unified Numbering System for a **high-strength, low-alloy pearlitic malleable iron**. This material represents a specialized class of cast iron that bridges the performance gap between standard pearlitic malleable irons and quenched-and-tempered alloy steels. The "F33800" designation specifically identifies a malleable iron formulation engineered to achieve enhanced mechanical properties through careful alloy balancing and controlled heat treatment processes, typically resulting in tensile strengths exceeding 550 MPa (80,000 psi) while maintaining useful ductility. Characterized by its refined pearlitic or bainitic matrix structure with well-dispersed temper carbon aggregates, F33800 offers an optimal combination of **exceptional tensile strength, good fatigue resistance, superior wear characteristics, and moderate toughness**. This grade is particularly valuable for applications requiring high load-bearing capacity in complex geometries where forging or machining from billet steel would be economically prohibitive or technically challenging. ### **2. International Standards & Equivalents** #### **Primary Governing Standards:** - **ASTM A220/A220M**: *Standard Specification for Pearlitic Malleable Iron Castings* (Primary reference) - **ASTM A602**: *Automotive Malleable Iron Castings* (Common application specification) - **SAE J158**: *Malleable Iron Castings* (Automotive engineering standard) #### **International Grade Equivalents:** | **Standard** | **Equivalent Grade** | **Tensile Strength Range** | **Notes** | |--------------|----------------------|----------------------------|-----------| | **ASTM A220** | **Grade 50005** or **Grade 55006** | 500-550 MPa | Most direct equivalents | | **ISO 5922** | **JMB 500-5** or **JMB 550-6** | 500-550 MPa | International standard | | **EN 1562** | **EN-GJMB-500-5** or **EN-GJMB-550-6** | 500-550 MPa | European standard | | **JIS G 5705** | **FCMB 550** | ~550 MPa | Japanese industrial standard | | **GB/T 9440** | **JMB 550** | ~550 MPa | Chinese national standard | | **DIN 1692** | **GTS-70** | ~700 MPa | German standard equivalent | #### **UNS System Context:** - **F33XXX Series**: Designates malleable cast irons - **F33800**: Specifically identifies high-strength pearlitic malleable iron with alloy enhancement - **Numerical Significance**: The "3800" range typically indicates specialized or enhanced compositions - **Related UNS Codes**: - F33100: Standard ferritic malleable iron - F34800: Standard pearlitic malleable iron - F35XXX: Austenitic or specialty malleable irons ### **3. Chemical Composition** #### **Enhanced Alloy Composition Ranges (Weight %):** | **Element** | **Typical Range** | **Target Range** | **Metallurgical Function** | |-------------|-------------------|------------------|---------------------------| | **Carbon (C)** | 2.40-2.90 | 2.50-2.80 | Strength foundation, carbide formation | | **Silicon (Si)** | 1.40-2.00 | 1.60-1.90 | Graphitization control, solid solution strengthening | | **Manganese (Mn)** | **1.00-1.60** | **1.20-1.50** | Primary hardenability element, pearlite refinement | | **Chromium (Cr)** | **0.20-0.50** | **0.25-0.40** | Secondary hardening, wear resistance enhancement | | **Molybdenum (Mo)** | **0.15-0.35** | **0.20-0.30** | Hardenability improvement, tempering resistance | | **Nickel (Ni)** | 0.10-0.40 | 0.15-0.30 | Toughness improvement, hardenability synergy | | **Copper (Cu)** | 0.30-0.80 | 0.40-0.70 | Hardenability aid, corrosion resistance | | **Vanadium (V)** | 0.05-0.15 | 0.08-0.12 | Grain refinement, precipitation strengthening | | **Phosphorus (P)** | ≤ 0.08 | ≤ 0.06 | Strictly controlled for toughness | | **Sulfur (S)** | ≤ 0.08 | ≤ 0.06 | Strictly controlled for ductility | #### **Alloy Design Philosophy:** - **Total Alloy Content (Mn+Cr+Mo+Ni+Cu)**: Typically 2.0-3.0% - **Hardenability Index**: DI (Ideal Diameter) ≥ 4 inches for consistent transformation - **Carbon Equivalent**: 3.8-4.2% for optimal castability and properties - **Alloy Ratios**: Balanced for synergistic effects on hardenability and tempering response - **Impurity Control**: Strict limits on tramp elements (Pb, Sn, Sb, As < 0.02% each) ### **4. Physical & Mechanical Properties** #### **Minimum Requirements (ASTM A220 Grade 55006 Equivalent):** | **Property** | **Minimum Value** | **Typical Range** | **Test Standard** | |--------------|------------------|-------------------|------------------| | **Tensile Strength** | 550 MPa (80,000 psi) | 550-650 MPa | ASTM E8 | | **Yield Strength (0.2%)** | 380 MPa (55,000 psi) | 380-450 MPa | ASTM E8 | | **Elongation** | 6% in 50 mm | 6-10% | ASTM E8 | | **Brinell Hardness** | 207-269 HB | 225-255 HB | ASTM E10 | #### **Comprehensive Property Profile:** **Mechanical Properties:** - **Tensile Strength**: 550-650 MPa (80,000-94,000 psi) - **Yield Strength**: 380-450 MPa (55,000-65,000 psi) - **Yield Ratio**: 0.69-0.72 - **Elongation**: 6-10% in 50 mm - **Reduction of Area**: 15-25% - **Modulus of Elasticity**: 175-185 GPa (25.4-26.8 × 10⁶ psi) - **Shear Modulus**: 68-72 GPa - **Poisson's Ratio**: 0.26-0.28 - **Compressive Strength**: 700-850 MPa - **Shear Strength**: 350-450 MPa **Hardness & Wear Characteristics:** - **Brinell Hardness**: 207-269 HB (typically 225-255 HB) - **Rockwell Hardness**: 98-108 HRB equivalent - **Vickers Hardness**: 235-285 HV - **Microhardness (Matrix)**: 250-300 HV - **Abrasion Resistance**: Excellent - 4-5× better than ferritic grades - **Scuffing Resistance**: Good with proper lubrication - **Wear Coefficient**: 1.5-2.5 × 10⁻⁶ mm³/N·m (ASTM G65) **Fatigue & Impact Properties:** - **Fatigue Limit (10⁷ cycles)**: 230-280 MPa (rotating bending) - **Fatigue Ratio**: 0.42-0.46 - **Charpy V-Notch Impact**: 12-20 J at 20°C - **Fracture Toughness (K₁c)**: 40-55 MPa√m - **Transition Temperature**: -10 to 10°C - **Crack Growth Threshold**: ΔK_th = 6-8 MPa√m **Physical & Thermal Properties:** - **Density**: 7.28-7.38 g/cm³ - **Melting Range**: 1150-1220°C - **Thermal Conductivity**: 38-44 W/m·K at 20°C - **Specific Heat**: 460-500 J/kg·K - **Thermal Expansion**: 10.6-11.4 × 10⁻⁶/°C (20-200°C) - **Electrical Resistivity**: 0.35-0.42 μΩ·m - **Damping Capacity**: 4-6× better than equivalent steels - **Magnetic Properties**: Strongly ferromagnetic ### **5. Heat Treatment & Microstructure** #### **Specialized Heat Treatment Process:** 1. **Stage 1 - Controlled Graphitization**: - Temperature: 920-950°C - Time: 10-25 hours - Atmosphere: Neutral or slightly oxidizing - Result: Complete decomposition of cementite 2. **Stage 2 - Accelerated Cooling**: - Cooling Rate: 1-5°C/second through transformation range - Method: Forced air or controlled furnace cooling - Objective: Pearlite/bainite formation instead of ferrite 3. **Stage 3 - Optional Temper**: - Temperature: 450-550°C for 2-4 hours - Purpose: Stress relief and property optimization - Result: Improved toughness and dimensional stability #### **Final Microstructure:** - **Matrix**: Fine pearlite or bainite (80-95%) - **Carbon Form**: Well-dispersed temper carbon aggregates - **Pearlite Spacing**: 0.5-1.0 μm (fine interlamellar spacing) - **Grain Size**: ASTM 6-8 - **Temper Carbon Size**: 20-50 μm aggregates - **Alloy Carbides**: Fine (Cr, Mo, V) carbides in matrix - **Inclusion Content**: ≤ 1.0% by volume ### **6. Manufacturing & Processing Characteristics** #### **Foundry Requirements:** - **Melting**: Electric induction furnace preferred for control - **Charge Materials**: High-purity base materials, controlled scrap - **Inoculation**: Advanced inoculation for nodule refinement - **Temperature Control**: ±15°C pouring temperature - **Molding**: No-bake or shell molding for accuracy - **Quality Systems**: Statistical process control required #### **Machinability Characteristics:** - **Machinability Rating**: 70-85% relative to B1112 steel - **Cutting Speed**: 80-120 m/min with carbide tools - **Feed Rate**: 0.15-0.25 mm/rev - **Tool Life**: Good with proper tool selection - **Surface Finish**: 1.6-3.2 μm Ra achievable - **Power Requirements**: Moderate increase over standard grades #### **Heat Treatment Response:** - **Consistent Transformation**: Good hardenability ensures uniform properties - **Distortion Control**: Moderate, requires careful fixturing - **Surface Integrity**: Good, minimal decarburization with proper atmosphere - **Repeatability**: Good batch-to-batch consistency ### **7. Product Applications** #### **Automotive & Transportation:** - **Heavy-Duty Components**: - Truck steering knuckles and hubs - Differential carriers and ring gear blanks - Transmission gears and synchronizers - Wheel ends and brake components - Suspension links and yokes - **Commercial Vehicles**: - Bus and coach axle components - Trailer suspension parts - Fifth wheel components - Heavy-duty brake system parts #### **Agricultural & Construction Equipment:** - **High-Stress Components**: - Tractor transmission gears - Implement hitch points and brackets - Loader arm connections - Excavator track system components - **Drive Train Applications**: - Final drive housings - PTO shafts and components - Gearbox covers and cases - High-wear sprockets and gears #### **Industrial Machinery:** - **Power Transmission**: - Industrial gearbox components - Coupling and clutch parts - Drive shafts and yokes - High-torque connection points - **Material Handling**: - Conveyor drive components - Crane and hoist gears - Forklift mast components - Heavy-duty bearing housings - **Process Equipment**: - Pump housings and brackets - Compressor components - Valve bodies for medium pressure - Mixer and agitator parts #### **Specialized Applications:** - **Railroad Components**: Coupler parts, brake system components - **Mining Equipment**: Crusher parts, conveyor system components - **Energy Sector**: Wind turbine components, pump parts - **Defense Applications**: Vehicle components, support equipment ### **8. Design Engineering Guidelines** #### **Section Size Limitations:** - **Optimal Wall Thickness**: 6-30 mm - **Maximum Uniform Section**: 50 mm - **Minimum Practical Section**: 4 mm - **Property Uniformity**: ±10% across design section #### **Design Stress Recommendations:** - **Static Design Stress**: 150-200 MPa (21,800-29,000 psi) - **Fatigue Design Stress**: 100-150 MPa (14,500-21,800 psi) - **Impact Applications**: Suitable for moderate impact loading - **Safety Factors**: 2.5-3.0 for dynamic applications #### **Geometric Considerations:** - **Fillet Radii**: Minimum 3 mm, preferred 5 mm - **Section Transitions**: Gradual changes (< 30°) - **Rib Design**: Height/width ratio ≤ 4:1 - **Boss Design**: Diameter ≤ 2× wall thickness - **Hole Placement**: Minimum 1.5× diameter from edges ### **9. Quality Assurance & Testing** #### **Standard Testing Requirements:** 1. **Chemical Analysis**: Each melt/lot (spectroscopic) 2. **Mechanical Testing**: Tensile tests from separately cast bars 3. **Hardness Testing**: Multiple locations per casting 4. **Microstructural Examination**: Verification of proper structure 5. **Non-Destructive Testing**: As specified by drawing #### **Advanced Testing (When Required):** - **Fatigue Testing**: Rotating bending or axial tests - **Impact Testing**: Charpy V-notch at various temperatures - **Fracture Toughness**: K₁c or J-integral testing - **Metallographic Analysis**: Quantitative structure assessment - **Wear Testing**: Pin-on-disk or block-on-ring tests #### **Certification Requirements:** - **Material Certificate**: Full chemical and mechanical data - **Heat Treatment Records**: Complete process documentation - **Statistical Process Control**: Capability studies (Cpk ≥ 1.33) - **Traceability**: Full heat/lot traceability maintained - **First Article Inspection**: Comprehensive dimensional reports ### **10. Comparative Analysis** #### **vs. Lower Strength Malleable Irons:** | **Property** | **F33800 vs. F33100** | **Advantage** | |--------------|------------------------|---------------| | **Tensile Strength** | +70-80% higher | Major | | **Yield Strength** | +80-100% higher | Significant | | **Hardness** | +40-50% higher | Moderate | | **Wear Resistance** | 3-4× better | Major | | **Fatigue Strength** | +50-60% higher | Important | | **Machinability** | 15-20% lower | Trade-off | #### **vs. Alternative Materials:** - **Ductile Iron (800-550-06)**: Higher strength, better wear, lower impact - **Cast Steel (ASTM A148 Gr. 105-85)**: Better damping, lower cost, similar strength - **Forged Steel (4140)**: Better casting complexity, lower cost, slightly lower properties - **Aluminum Alloys (A356-T6)**: Higher density, much higher strength, different applications ### **11. Economic & Technical Considerations** #### **Cost Factors:** - **Material Cost**: 20-40% higher than standard pearlitic grades - **Processing Cost**: Moderate increase for controlled cooling - **Tooling Cost**: Similar to other malleable irons - **Life Cycle Cost**: Excellent for high-wear applications #### **Technical Trade-offs:** - **Strength vs. Toughness**: Good balance at this strength level - **Cost vs. Performance**: Premium performance at reasonable cost increase - **Manufacturability**: Requires more control than standard grades - **Weight vs. Strength**: Excellent strength-to-weight ratio #### **Supply Chain Considerations:** - **Supplier Availability**: Moderate, specialized foundries required - **Lead Times**: Similar to other premium malleable irons - **Technical Support**: Requires metallurgical expertise - **Global Availability**: Good in industrial regions ### **12. Technical Limitations** #### **Material Constraints:** - **Maximum Service Temperature**: 400°C continuous - **Weldability**: Poor, not recommended - **Corrosion Resistance**: Similar to other cast irons - **Impact Resistance**: Good but lower than ferritic grades - **Size Limitations**: Maximum ~100 kg single casting #### **Processing Limitations:** - **Heat Treatment Control**: Requires precise temperature management - **Section Sensitivity**: Properties vary with casting thickness - **Machining Requirements**: May require harder tool materials - **Quality Control**: More stringent than standard grades #### **Design Limitations:** - **Not for Extreme Impact**: Lower than ferritic malleable irons - **Stress Concentration**: Sensitive to notches and sharp corners - **Fatigue Design**: Requires careful stress analysis - **Complex Geometries**: May require special consideration for uniform cooling ### **13. Future Developments & Trends** #### **Technical Advancements:** 1. **Process Optimization**: Improved cooling control for better consistency 2. **Alloy Development**: Enhanced grades with better toughness 3. **Quality Monitoring**: Real-time process control systems 4. **Surface Engineering**: Improved wear resistance treatments #### **Market Trends:** - **Lightweighting**: Continued development for automotive applications - **Electrification**: Adaptation for electric vehicle components - **Digital Integration**: Smart manufacturing implementation - **Sustainability**: Improved energy efficiency in processing #### **Research Directions:** - **Microstructure Control**: Tailored properties through process optimization - **Alloy Efficiency**: Achieving properties with lower alloy content - **Process Modeling**: Predictive simulation for property development - **Quality Prediction**: Advanced non-destructive evaluation methods ### **14. Implementation Guidelines** #### **Success Factors:** 1. **Early Design Involvement**: Optimize geometry for property development 2. **Supplier Qualification**: Verify capability with F33800 grade 3. **Prototype Testing**: Validate properties for specific application 4. **Process Validation**: Ensure consistent manufacturing #### **Risk Mitigation:** - **First Article Inspection**: Comprehensive dimensional verification - **Process Monitoring**: Statistical control of key parameters - **Alternative Materials**: Identify backups if needed - **Design Validation**: FEA and physical testing #### **Development Process:** - **Phase 1**: Material selection and feasibility (1-2 months) - **Phase 2**: Process development and optimization (2-4 months) - **Phase 3**: Prototype manufacturing and testing (2-3 months) - **Phase 4**: Production qualification (1-2 months) - **Phase 5**: Ramp-up and continuous improvement (ongoing) ### **15. Conclusion** **UNS F33800** represents a **high-performance engineered material** that delivers exceptional strength and wear resistance while maintaining the manufacturing advantages of cast iron. This grade fills an important niche in the materials spectrum, offering designers a compelling alternative to forged steels for complex, high-strength components. The successful application of F33800 requires careful consideration of its specific characteristics and manufacturing requirements. When properly implemented, it provides outstanding value in applications where its combination of strength, wear resistance, castability, and cost-effectiveness align with design requirements. As manufacturing technologies continue to advance, F33800 is well-positioned to maintain its relevance in demanding engineering applications. Its balanced property profile and manufacturing flexibility make it a valuable tool for engineers facing challenging design requirements in automotive, heavy equipment, and industrial applications. #### **Key Recommendations:** 1. **Specify Clearly**: Reference appropriate standards and requirements 2. **Design Appropriately**: Consider material limitations and advantages 3. **Quality Assure**: Implement comprehensive testing and control 4. **Collaborate Early**: Work closely with foundry and heat treatment providers 5. **Validate Thoroughly**: Test prototypes under actual service conditions **UNS F33800** stands as a testament to the continuing evolution and relevance of advanced cast iron technology in modern engineering design, offering solutions that balance performance, manufacturability, and economic viability in demanding applications. -:- For detailed product information, please contact sales. -: UNS F33800 Cast Iron Specification Dimensions Size： Diameter 20-1000 mm Length <6592 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. -: UNS F33800 Cast Iron Properties -:- For detailed product information, please contact sales. -:

Applications of UNS F33800 Cast Iron Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers UNS F33800 Cast Iron Tube -:- For detailed product information, please contact sales. -:

Packing of UNS F33800 Cast Iron Tube -:- 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 3063 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