United Cast Bar,Unibar 300 Continuously Cast Iron Wire

United Cast Bar Unibar 300 Continuously Cast Iron Wire Product Information -:- For detailed product information, please contact sales. -: United Cast Bar Unibar 300 Continuously Cast Iron Wire Synonyms -:- For detailed product information, please contact sales. -:

United Cast Bar Unibar 300 Continuously Cast Iron Product Information -:- For detailed product information, please contact sales. -: # **United Cast Bar Unibar 300 Continuously Cast Iron** ## **1. Product Overview** **United Cast Bar Unibar 300** is a high-performance **continuously cast grey cast iron** engineered to deliver superior mechanical properties while maintaining the exceptional manufacturing characteristics inherent to cast iron. As the premium strength grade in United's Unibar series, this material provides **minimum tensile strength of 300 MPa**, making it suitable for demanding applications requiring enhanced load-bearing capacity, improved wear resistance, and reliable performance under higher mechanical stresses. Manufactured through United's proprietary vertical continuous casting process, Unibar 300 exhibits **exceptional microstructural uniformity, directional solidification advantages, and guaranteed mechanical consistency** that significantly outperform conventional sand-cast alternatives. The material is specifically designed for precision components where strength, dimensional stability, and machining efficiency are critical success factors. ## **2. Chemical Composition** Unibar 300 features a carefully engineered chemical composition that promotes a fully pearlitic matrix with refined graphite structure, optimized for the continuous casting process: | Element | Composition Range (%) | Metallurgical Function | |---------|---------------------|-----------------------| | **Carbon (C)** | 3.1 - 3.5 | Controlled to balance graphite formation and matrix strength; lower carbon than lower grades for enhanced mechanical properties | | **Silicon (Si)** | 1.8 - 2.2 | Graphitizing agent; precisely controlled to achieve target pearlite content and strength | | **Manganese (Mn)** | 0.9 - 1.2 | Strong pearlite stabilizer; provides solid solution strengthening and improves hardenability | | **Phosphorus (P)** | 0.04 - 0.10 | Enhances fluidity and pressure tightness; minimized to maintain toughness | | **Sulfur (S)** | ≤ 0.08 | Strictly controlled to optimize machinability and graphite morphology | | **Chromium (Cr)** | 0.25 - 0.40 | Significantly enhances pearlite formation, improves hardness, wear resistance, and thermal stability | | **Copper (Cu)** | 0.6 - 1.0 | Refines pearlite structure, improves section uniformity, and enhances corrosion resistance | | **Molybdenum (Mo)** | 0.15 - 0.30 | Enhances hardenability, improves high-temperature strength, and refines microstructure | | **Tin (Sn)** | 0.05 - 0.10 | Optional addition for strong pearlite promotion in heavy sections | **Microstructural Characteristics:** - **Graphite Structure:** **Type A lamellar graphite** with uniform distribution (ASTM Type II, Size 3-4) - **Matrix Structure:** **Fully pearlitic** (95-100% pearlite) with minimal ferrite content - **Graphite Morphology:** Fine, uniformly distributed flakes with favorable orientation from directional solidification - **Pearlite Structure:** Fine lamellar spacing (interlamellar spacing typically 0.5-1.0 μm) - **Microstructural Consistency:** Exceptional uniformity throughout cross-section due to controlled cooling rates ## **3. Physical & Mechanical Properties** ### **Physical Properties:** - **Density:** 7.20 - 7.30 g/cm³ - **Melting Range:** 1150 - 1200°C - **Thermal Conductivity:** 44 - 50 W/m·K (at 20°C) - **Specific Heat Capacity:** 0.46 - 0.50 kJ/kg·K - **Coefficient of Thermal Expansion:** 10.5 - 11.5 × 10⁻⁶/°C (20-200°C) - **Electrical Resistivity:** 80 - 95 μΩ·cm - **Damping Capacity:** 5-8 × that of steel (logarithmic decrement: 0.002-0.004) ### **Mechanical Properties (Longitudinal Direction):** - **Tensile Strength:** 300 - 380 MPa - **Compressive Strength:** 900 - 1100 MPa (3.0-3.5 × tensile strength) - **Transverse Rupture Strength:** 500 - 620 MPa - **Modulus of Elasticity:** 115 - 135 GPa - **Shear Modulus:** 46 - 54 GPa - **Poisson's Ratio:** 0.25 - 0.27 - **Hardness:** 210 - 260 HB - **Elongation:** < 1% - **Impact Toughness:** 2 - 6 J (Charpy unnotched) - **Fatigue Strength (Rotating Bending):** 110 - 150 MPa - **Wear Resistance:** Excellent under lubricated conditions ### **Performance Characteristics:** - **Machinability Index:** 70 - 80% (relative to free-machining steel) - **Surface Finish Capability:** 0.4 - 2.5 μm Ra achievable - **Tool Life:** Very good; graphite provides natural lubrication but harder matrix requires proper tool selection - **Pressure Tightness:** Excellent due to fine, uniformly distributed graphite structure - **Dimensional Stability:** Exceptional; minimal distortion during machining and in service - **Thermal Stability:** Good resistance to thermal growth and distortion ### **Section-Dependent Properties:** | Bar Diameter (mm) | Typical Hardness (HB) | Tensile Strength (MPa) | Pearlite Content (%) | |-------------------|----------------------|----------------------|---------------------| | 25 - 50 | 230 - 260 | 340 - 380 | 98-100 | | 51 - 100 | 220 - 250 | 320 - 360 | 96-99 | | 101 - 200 | 210 - 240 | 300 - 340 | 94-97 | | 201 - 300 | 200 - 230 | 290 - 330 | 92-96 | ## **4. Product Applications** ### **High-Pressure Hydraulic Systems:** - **Heavy-Duty Cylinder Barrels:** For hydraulic cylinders operating at 300-500 bar - **High-Pressure Valve Blocks and Manifolds:** Requiring pressure integrity and complex internal geometries - **Axial Piston Pump Components:** Valve plates, cylinder blocks, and housings - **Hydraulic Motor Casings and End Covers** ### **Automotive & Heavy Transportation:** - **Commercial Vehicle Brake Components:** Discs, drums, and caliper housings for trucks and buses - **Diesel Engine Components:** Cylinder heads (non-combustion areas), timing covers, gear housings - **Transmission Cases and Housings:** For heavy-duty manual and automatic transmissions - **Turbocharger Housings and Exhaust Manifolds** ### **Industrial Machinery & Equipment:** - **Machine Tool Structural Components:** High-precision lathe beds, machining center bases, grinding machine tables - **Press Frames and Slides:** For stamping and forming presses requiring rigidity and damping - **Gearbox Housings and Casings:** For industrial power transmission systems - **Rolling Mill Components:** Guides, bearings, and support structures ### **Power Generation & Heavy Industry:** - **Pump Casings and Diffusers:** For high-pressure water, chemical, and process pumps - **Compressor Cylinders and Liners:** For industrial air and gas compressors - **Valve Bodies and Bonnets:** For steam, oil, and gas applications - **Turbine Casings and Components:** For steam and gas turbine applications ### **Specialized Applications:** - **Precision Measuring Equipment Bases:** Coordinate measuring machines, optical comparators - **Industrial Robot Components:** Bases, arms, and mounting structures - **Semiconductor Manufacturing Equipment:** Stages, bases, and structural components - **Medical Equipment Components:** MRI and CT scanner bases, radiation therapy equipment ## **5. International & Relevant Standards** ### **Material Specifications:** - **EN 1561:2011:** *Founding — Grey cast irons* - **EN-GJL-300:** Minimum tensile strength 300 MPa - **ISO 185:2019:** *Grey cast irons — Classification* - **Grade 300:** Minimum tensile strength 300 MPa - **ASTM A48/A48M-22:** *Standard Specification for Gray Iron Castings* - **Class 35:** Minimum tensile strength 241 MPa (248 MPa) - **Class 40:** Minimum tensile strength 276 MPa (283 MPa) - Unibar 300 typically meets or exceeds Class 40 requirements - **DIN 1691:** *Grey cast iron* - **GG-30:** Minimum tensile strength 294 MPa - **JIS G5501:2022:** *Grey iron castings* - **FC300:** Minimum tensile strength 294 MPa - **GB/T 9439-2010:** *Grey iron castings* (Chinese Standard) - **HT300:** Minimum tensile strength 300 MPa ### **Continuous Casting Standards:** - **DIN EN 16079:2011:** *Continuous cast iron bars* - Specifies technical delivery conditions for continuously cast bars - **ISO 1083:** *Spheroidal graphite cast irons* (reference for comparison) - **United Cast Bar Internal Specifications:** - UCB-QS-300: Quality specification for Unibar 300 - UCB-PS-003: Process standard for high-strength grades ### **Testing & Certification Standards:** - **ASTM A247:** *Evaluating the Microstructure of Graphite in Iron Castings* - **ISO 945-1:** *Microstructure of cast irons — Part 1: Graphite classification* - **ASTM E8/E8M:** *Tension Testing of Metallic Materials* - **ASTM E10:** *Brinell Hardness of Metallic Materials* - **EN 10204:** *Metallic products — Types of inspection documents* - Type 3.1 certificate standard with each shipment - **ISO 4964:** *Tensile testing of cast iron* ## **6. Manufacturing & Processing Advantages** ### **Continuous Casting Benefits:** 1. **Directional Solidification:** Creates aligned graphite structure enhancing longitudinal properties 2. **Reduced Internal Defects:** Minimal shrinkage porosity, gas holes, and inclusions 3. **Consistent Quality:** Uniform microstructure and properties along entire bar length 4. **Material Efficiency:** Near-net shape production reduces machining waste 5. **Superior Surface Quality:** Excellent as-cast surface (typically 4.0-10.0 μm Ra) ### **Available Forms & Specifications:** - **Solid Bars:** 20mm to 600mm diameter - **Hollow Bars (Tubes):** 50mm to 400mm OD with various wall thicknesses - **Standard Lengths:** 3-6 meters; custom lengths up to 12 meters available - **Tolerances:** Diameter ±0.3% to ±0.8%; straightness within 1.0mm/meter - **Surface Condition:** As-cast, rough turned, precision turned, or ground finishes available - **Heat Treatment:** Stress relieving available as standard; annealing and hardening optional ### **Heat Treatment Options:** - **Stress Relieving:** 520-580°C for 1-2 hours per inch of thickness - **Annealing:** 850-900°C for improved machinability in specific applications - **Surface Hardening:** Flame, induction, or laser hardening for enhanced wear resistance - **Nitriding:** For specific wear and corrosion resistance requirements ## **7. Machining & Fabrication Guidelines** ### **Recommended Cutting Parameters:** | Operation | Speed (m/min) | Feed (mm/rev) | Depth of Cut (mm) | Tool Material | |-----------|--------------|---------------|-------------------|--------------| | Turning | 100 - 160 | 0.15 - 0.40 | 2.0 - 5.0 | C5-C8 Carbide | | Drilling | 20 - 30 | 0.10 - 0.20 | - | Carbide-tipped | | Milling | 60 - 100 | 0.10 - 0.25 | 1.0 - 3.0 | Carbide | | Tapping | 4 - 10 | - | - | HSS-E or Carbide | | Boring | 70 - 120 | 0.08 - 0.20 | 1.0 - 3.0 | Carbide | | Threading | 40 - 80 | - | - | Carbide inserts | ### **Tooling Recommendations:** - **Insert Grades:** C5-C8 carbide with PVD or CVD coatings (TiN, TiCN, Al₂O₃) - **Tool Geometry:** Positive to neutral rake angles with sharp cutting edges - **Coolant:** Water-soluble oils at 5-10% concentration; high-pressure systems beneficial - **Chip Control:** Good natural chip breaking; use chipbreakers for heavier cuts ### **Special Machining Considerations:** 1. **Thread Quality:** Excellent thread quality achievable; use sharp, properly aligned tools 2. **Deep Hole Drilling:** Use peck drilling and proper coolant delivery for holes >8× diameter 3. **Fine Boring:** Can achieve bore tolerances of IT6-IT7 with proper techniques 4. **Surface Finishing:** Can achieve 0.2-0.4 μm Ra with diamond turning or fine grinding 5. **Thermal Management:** Monitor tool temperature to prevent work hardening ### **Non-Machining Fabrication:** - **Grinding:** Excellent grindability; use aluminum oxide (46-60 grit) or CBN wheels - **Welding:** Generally not recommended; requires specialized procedures if necessary - **Joining:** Mechanical fastening preferred; high-strength adhesives suitable for clean surfaces - **Surface Treatments:** Excellent response to nitriding, plating, and various coatings ## **8. Quality Assurance & Testing** ### **Comprehensive Quality Protocol:** 1. **Raw Material Control:** Certified raw materials with full traceability 2. **Melt Analysis:** Spectroscopic analysis for each heat with complete documentation 3. **Process Monitoring:** Continuous monitoring of casting parameters (temperature, speed, cooling) 4. **Mechanical Testing:** Tensile tests from each production lot (minimum 4 bars per heat) 5. **Hardness Mapping:** Systematic hardness testing across diameter and along length 6. **Microstructural Analysis:** Regular assessment of graphite form, size, and matrix structure 7. **Non-Destructive Testing:** 100% ultrasonic testing for bars >75mm diameter 8. **Dimensional Verification:** Complete geometric inspection to specification requirements ### **Certification & Documentation:** - **Full Traceability:** Complete chain from raw materials to finished bars - **Material Certificates:** EN 10204 3.1 certificates with comprehensive test data - **Statistical Process Control:** Real-time SPC with control charts for all critical parameters - **Quality Records:** Maintained for minimum 15 years - **Third-Party Certification:** Available from recognized international bodies ### **Additional Testing Services:** - **Pressure Testing:** Up to 1000 bar for hydraulic applications - **Fatigue Testing:** Axial and rotating bending fatigue to customer specifications - **Wear Testing:** Pin-on-disk, block-on-ring, or field simulation testing - **Corrosion Testing:** Salt spray, humidity, and chemical resistance testing - **Metallurgical Analysis:** SEM, EDS, and advanced microstructural characterization ## **9. Comparative Analysis** ### **vs. Sand-Cast Equivalent (EN-GJL-300):** | Parameter | Unibar 300 | Sand-Cast EN-GJL-300 | Advantage | |-----------|------------|----------------------|-----------| | **Tensile Strength Consistency** | ±3-5% | ±20-30% | Superior | | **Internal Soundness** | >99.8% dense | 92-96% dense | Significantly Better | | **Machining Yield** | 90-95% | 60-70% | Higher | | **As-Cast Surface Finish** | 4.0-10.0 μm Ra | 30-150 μm Ra | Superior | | **Production Lead Time** | Stock/1-2 weeks | 8-16 weeks | Faster | | **Scrap Rate in Machining** | 1-3% | 10-20% | Lower | | **Dimensional Accuracy** | ±0.3-0.8% | ±1.5-3.0% | Better | ### **vs. Competitive Continuously Cast Grades:** | Parameter | Unibar 300 | European Competitor | Asian Competitor | |-----------|------------|---------------------|-----------------| | **Strength Range (MPa)** | 300-380 | 280-350 | 290-360 | | **Hardness Range (HB)** | 210-260 | 200-240 | 205-250 | | **Maximum Diameter (mm)** | 600 | 350 | 450 | | **Standard Certification** | EN 10204 3.1 | EN 10204 2.2 | Manufacturer's cert | | **Delivery Consistency** | 98% on-time | 90% on-time | 85% on-time | | **Technical Support** | Comprehensive | Limited | Basic | ### **vs. Alternative Materials:** | Material | Tensile Strength (MPa) | Machinability | Damping | Cost Index | |----------|----------------------|---------------|---------|------------| | **Unibar 300** | 300-380 | Excellent | Excellent | 1.0 | | **Ductile Iron (500-7)** | 500-700 | Good | Good | 1.3-1.5 | | **Mild Steel (1045)** | 585-700 | Good | Poor | 0.9-1.1 | | **Aluminum (6061-T6)** | 240-310 | Excellent | Good | 1.8-2.2 | ## **10. Economic & Sustainability Considerations** ### **Total Cost Analysis:** - **Material Cost Premium:** 20-30% over sand-cast equivalent - **Machining Cost Savings:** 25-40% reduction due to superior machinability - **Tool Life Improvement:** 40-60% longer tool life compared to sand-cast iron - **Scrap Reduction:** 70-85% less in-process scrap material - **Quality Cost Reduction:** 50-70% lower inspection and rework costs - **Total Cost per Part:** Typically 15-25% lower despite higher initial material cost ### **Life Cycle Cost Benefits:** 1. **Extended Component Life:** Superior wear resistance and dimensional stability 2. **Reduced Maintenance:** Consistent performance with minimal degradation 3. **Improved Reliability:** Fewer failures and reduced downtime 4. **Energy Efficiency:** Lower power consumption during machining operations 5. **Inventory Reduction:** Predictable quality reduces safety stock requirements ### **Sustainability Advantages:** 1. **Material Efficiency:** 92-97% utilization vs. 55-65% for conventional processes 2. **Energy Conservation:** Continuous casting uses 30-40% less energy than sand casting 3. **Waste Minimization:** No sand waste generation; minimal machining swarf 4. **Recyclability:** 100% recyclable with established recycling infrastructure 5. **Emissions Reduction:** Lower CO₂ footprint compared to steel production 6. **Long Service Life:** Reduced replacement frequency and material consumption ### **Environmental Compliance:** - **REACH Compliant:** Meets EU chemical safety requirements - **RoHS Compliant:** Free from restricted hazardous substances - **ISO 14001:** Manufactured in environmentally certified facilities - **Carbon Footprint:** Documented carbon emissions data available ## **11. Technical Support & Value-Added Services** ### **United Cast Bar Technical Support:** 1. **Application Engineering:** Material selection and design optimization support 2. **Process Development:** Machining parameter optimization and tooling recommendations 3. **Troubleshooting:** On-site or remote assistance for production issues 4. **Training Programs:** Technical workshops and training sessions 5. **Joint Development:** Collaborative projects for new applications ### **Value-Added Manufacturing Services:** - **Pre-Machining:** Turning, facing, boring, and threading to customer specifications - **Heat Treatment:** Stress relieving, annealing, and surface hardening - **Cutting Services:** Precision cut-to-length with minimal burr formation - **Surface Preparation:** Shot blasting, painting, and coating applications - **Kitting & Packaging:** Custom packaging for automated production lines ### **Supply Chain Integration:** - **Inventory Management:** Consignment stock and kanban systems - **Just-in-Time Delivery:** Scheduled deliveries aligned with production needs - **Quality Integration:** Electronic data interchange for quality documentation - **Global Support:** Technical and logistical support worldwide ## **12. Case Studies & Application Examples** ### **Case Study 1: Hydraulic Cylinder Manufacturing** - **Application:** High-pressure hydraulic cylinders for construction equipment - **Challenge:** High scrap rates (15-20%) with sand-cast material due to porosity - **Solution:** Switch to Unibar 300 continuously cast bars - **Results:** Scrap reduced to 2%, machining time reduced 30%, pressure test failure rate reduced from 8% to 0.5% ### **Case Study 2: Machine Tool Base Manufacturing** - **Application:** Precision grinding machine bases - **Challenge:** Dimensional instability and vibration issues with welded steel construction - **Solution:** Design conversion to Unibar 300 monolithic casting - **Results:** Vibration reduced by 60%, thermal stability improved, assembly time reduced 40% ### **Case Study 3: Automotive Transmission Components** - **Application:** Transmission housings for commercial vehicles - **Challenge:** Weight reduction while maintaining strength and NVH performance - **Solution:** Optimized design using Unibar 300 with wall thickness reduction - **Results:** Weight reduced 15%, noise levels reduced 3 dB, cost savings 12% ## **Conclusion** **United Cast Bar Unibar 300** represents the pinnacle of continuously cast grey iron technology, offering an exceptional combination of mechanical properties, manufacturing efficiency, and cost-effectiveness. Its guaranteed consistency, superior internal quality, and excellent processing characteristics provide significant advantages for precision engineering applications across multiple industries. The material's compliance with international standards (EN-GJL-300, ASTM Class 40 equivalent), combined with United's comprehensive technical support and quality assurance systems, makes it an ideal choice for demanding applications where reliability, performance, and total cost of ownership are critical considerations. **Optimal Applications Include:** - High-pressure hydraulic and pneumatic components requiring guaranteed pressure integrity - Precision machine tool structures where vibration damping and dimensional stability are essential - Automotive and transportation components subjected to high mechanical stresses - Industrial equipment requiring reliable performance in demanding service conditions - Applications where total manufacturing cost optimization and quality consistency are paramount For engineering organizations seeking to enhance product performance, improve manufacturing efficiency, and reduce total costs, Unibar 300 offers a proven material solution backed by United's extensive experience and commitment to quality excellence. -:- For detailed product information, please contact sales. -: United Cast Bar Unibar 300 Continuously Cast Iron Specification Dimensions Size： Diameter 20-1000 mm Length <6650 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. -: United Cast Bar Unibar 300 Continuously Cast Iron Properties -:- For detailed product information, please contact sales. -:

Applications of United Cast Bar Unibar 300 Continuously Cast Iron Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers United Cast Bar Unibar 300 Continuously Cast Iron Wire -:- For detailed product information, please contact sales. -:

Packing of United Cast Bar Unibar 300 Continuously Cast Iron Wire -:- 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 Wire 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 3121 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