United Cast Bar,Unibar 400-15 Fully Continuously Cast Spheroidal Graphite Iron Tube,Pipe

United Cast Bar Unibar 400-15 Fully Annealed Continuously Cast Spheroidal Graphite Iron Tube Product Information -:- For detailed product information, please contact sales. -: United Cast Bar Unibar 400-15 Fully Annealed Continuously Cast Spheroidal Graphite Iron Tube Synonyms -:- For detailed product information, please contact sales. -:

United Cast Bar Unibar 400-15 Fully Annealed Continuously Cast Spheroidal Graphite Iron Product Information -:- For detailed product information, please contact sales. -: # **United Cast Bar Unibar 400-15 Fully Annealed Continuously Cast Spheroidal Graphite Iron** ## **1. Product Overview** **United Cast Bar Unibar 400-15** represents a premium-grade **continuously cast and fully annealed ductile iron** engineered to deliver an exceptional combination of high strength and superior ductility. The "400-15" designation indicates **minimum tensile strength of 400 MPa** and **minimum elongation of 15%**, positioning this material in the high-performance segment of ductile iron grades. Through United's proprietary continuous casting process followed by a complete annealing heat treatment, Unibar 400-15 achieves a fully ferritic matrix with perfectly spheroidized graphite nodules, offering outstanding mechanical properties with excellent machinability and impact resistance. This material combines the manufacturing advantages of continuous casting – including superior microstructural homogeneity, minimal internal defects, and excellent dimensional consistency – with the enhanced mechanical properties of fully annealed ductile iron. It is specifically designed for applications requiring high strength, good toughness, pressure tightness, and reliable performance under dynamic loading conditions. ## **2. Chemical Composition** Unibar 400-15 features a carefully balanced composition optimized for spheroidal graphite formation and subsequent full annealing: | Element | Composition Range (%) | Metallurgical Function | |---------|---------------------|-----------------------| | **Carbon (C)** | 3.5 - 3.9 | Primary carbon source; controlled for optimal graphite nodule formation and mechanical properties | | **Silicon (Si)** | 2.2 - 2.8 | Graphitizing agent; promotes ferrite formation during annealing; influences matrix structure | | **Manganese (Mn)** | 0.1 - 0.4 | Kept low to minimize pearlite formation and ensure fully ferritic matrix after annealing | | **Phosphorus (P)** | ≤ 0.04 | Strictly limited to maintain ductility and impact resistance | | **Sulfur (S)** | ≤ 0.015 | Minimized to ensure successful magnesium treatment and graphite spheroidization | | **Magnesium (Mg)** | 0.03 - 0.06 | Essential spheroidizing agent; ensures proper graphite nodule formation | | **Cerium (Ce)** | 0.005 - 0.02 | Supplementary nodulizer; improves graphite morphology and consistency | | **Copper (Cu)** | ≤ 0.10 | Limited to maintain ferritic structure during annealing | | **Chromium (Cr)** | ≤ 0.05 | Minimized to prevent carbide formation and ensure complete annealing | | **Nickel (Ni)** | ≤ 0.10 | Optional trace element for microstructural refinement | **Microstructural Characteristics:** - **Graphite Structure:** **Type I (perfectly spheroidal) graphite nodules** with uniform distribution - **Nodule Count:** 100-200 nodules/mm² (typical) - **Nodule Size:** ASTM Size 4-6 (medium to fine) - **Matrix Structure:** **100% ferritic** after full annealing treatment - **Nodularity:** >90% (typically 95-98%) - **Microstructural Uniformity:** Exceptional consistency throughout cross-section due to controlled continuous casting and annealing ## **3. Physical & Mechanical Properties** ### **Physical Properties:** - **Density:** 7.0 - 7.1 g/cm³ (slightly lower than grey iron due to graphite spheroidization) - **Melting Range:** 1140 - 1180°C - **Thermal Conductivity:** 36 - 42 W/m·K (at 20°C) - **Specific Heat Capacity:** 0.46 - 0.50 kJ/kg·K - **Coefficient of Thermal Expansion:** 11.5 - 12.5 × 10⁻⁶/°C (20-200°C) - **Electrical Resistivity:** 55 - 65 μΩ·cm - **Damping Capacity:** Moderate (approximately 3-5 × steel) ### **Mechanical Properties (After Full Annealing):** - **Tensile Strength (Rm):** 400 - 480 MPa - **Yield Strength (Rp0.2):** 250 - 300 MPa - **Elongation (A):** 15 - 25% (in 5× diameter gauge length) - **Reduction of Area:** 20 - 35% - **Hardness:** 130 - 180 HB - **Modulus of Elasticity:** 165 - 175 GPa - **Shear Modulus:** 65 - 70 GPa - **Poisson's Ratio:** 0.27 - 0.29 - **Impact Toughness (Charpy V-notch at 20°C):** 12 - 20 J - **Impact Toughness (Charpy V-notch at -20°C):** 8 - 15 J - **Fatigue Strength (Rotating Bending, R=-1):** 180 - 220 MPa (10⁷ cycles) - **Compressive Strength:** 700 - 850 MPa ### **Special Properties:** - **Machinability Index:** 70 - 80% (relative to free-machining steel) - **Surface Finish Capability:** 0.4 - 1.6 μm Ra achievable - **Pressure Tightness:** Excellent (superior to grey iron) - **Weldability:** Good (with proper procedures) - **Thermal Shock Resistance:** Very good - **Low-Temperature Toughness:** Maintains good impact properties down to -40°C ### **Section-Dependent Properties:** | Bar Diameter (mm) | Typical Hardness (HB) | Tensile Strength (MPa) | Elongation (%) | |-------------------|----------------------|----------------------|---------------| | 25 - 50 | 150 - 180 | 420 - 480 | 18 - 25 | | 51 - 100 | 140 - 170 | 410 - 460 | 16 - 22 | | 101 - 200 | 135 - 165 | 400 - 450 | 15 - 20 | | 201 - 300 | 130 - 160 | 390 - 440 | 15 - 18 | ## **4. Heat Treatment Process** ### **Full Annealing Cycle:** 1. **Heating:** Slow heating to 900-920°C at 50-100°C/hour 2. **Soaking:** Hold at temperature for 2-4 hours (depending on section size) 3. **Furnace Cooling:** Controlled cooling to 690-720°C at 30-50°C/hour 4. **Extended Soaking:** Hold in ferritic transformation range for 4-8 hours 5. **Final Cooling:** Furnace cool to 300°C, then air cool to room temperature ### **Annealing Objectives:** - Complete decomposition of any pearlite or carbides - Full transformation to ferritic matrix - Stress relief and dimensional stabilization - Optimization of ductility and toughness - Improvement of machinability ## **5. Product Applications** ### **Pressure-Containing Components:** - **High-Pressure Valve Bodies and Bonnets:** For oil & gas, chemical processing - **Pump Casings and Housings:** For multistage pumps, boiler feed pumps - **Compressor Components:** Cylinders, housings, and valve plates - **Hydraulic Manifolds and Blocks:** Requiring pressure integrity and complex internal passages ### **Automotive & Transportation:** - **Commercial Vehicle Components:** Heavy-duty axle housings, suspension components - **Railway Applications:** Brake discs, gearbox housings, coupling components - **Off-Road Equipment:** Hydraulic cylinder components, mounting brackets - **Electric Vehicle Components:** Motor housings, battery tray components ### **Industrial Machinery:** - **Gearbox Housings:** For wind turbines, industrial reducers - **Machine Tool Components:** Bases, slides, and structural elements - **Press Frames and Components:** Requiring vibration damping and impact resistance - **Rolling Mill Equipment:** Rolls, housings, and guide components ### **Energy & Power Generation:** - **Wind Turbine Components:** Hubs, frames, and gearbox housings - **Turbine Casings:** Steam and gas turbine components - **Nuclear Components:** Non-critical pressure-retaining parts - **Hydroelectric Equipment:** Gate components, turbine housings ### **Specialized Applications:** - **Marine Components:** Propeller hubs, rudder stocks, deck machinery - **Mining Equipment:** Crusher components, conveyor system parts - **Construction Machinery:** Excavator components, crane parts - **Agricultural Equipment:** Gearbox housings, implement components ## **6. International & Relevant Standards** ### **Material Specifications:** - **EN 1563:2018:** *Founding — Spheroidal graphite cast irons* - **EN-GJS-400-15:** Minimum tensile strength 400 MPa, minimum elongation 15% - **EN-GJS-400-18:** May also be supplied to this higher ductility grade - **ISO 1083:2018:** *Spheroidal graphite cast irons* - **JS/ISO 400-15:** Equivalent international designation - **ASTM A536-84 (2020):** *Standard Specification for Ductile Iron Castings* - **Grade 60-40-18:** 60 ksi (414 MPa) tensile, 40 ksi (276 MPa) yield, 18% elongation - **Grade 65-45-12:** 65 ksi (448 MPa) tensile, 45 ksi (310 MPa) yield, 12% elongation - Unibar 400-15 properties align between these ASTM grades - **DIN EN 1563:** *Gusseisen mit Kugelgraphit* - **GGG-40** (historical designation) - **JIS G5502:2022:** *Spheroidal graphite iron castings* - **FCD400-15:** Minimum tensile strength 400 MPa, minimum elongation 15% ### **Continuous Casting Standards:** - **DIN EN 16079:2011:** *Continuous cast iron bars* - Specifies requirements for continuously cast iron bars - **ISO 16112:2017:** *Compacted (vermicular) graphite cast irons* (reference only) - **United Cast Bar Internal Specifications:** - UCB-QS-400-15: Premium ductile iron specification - UCB-AT-001: Annealing technology standard ### **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; Type 3.2 available for critical applications - **ISO 6892-1:** *Metallic materials — Tensile testing* ## **7. Manufacturing Advantages** ### **Continuous Casting Benefits:** 1. **Directional Solidification:** Controlled solidification improves graphite nodule distribution 2. **Reduced Internal Defects:** Minimal shrinkage porosity 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 6.3-12.5 μm Ra) ### **Annealing Advantages:** 1. **Full Ferritic Matrix:** Maximum ductility and impact resistance 2. **Stress Relief:** Reduced residual stresses for improved dimensional stability 3. **Optimized Machinability:** Softer matrix with consistent hardness 4. **Improved Homogeneity:** Uniform properties throughout cross-section ### **Available Forms & Specifications:** - **Solid Bars:** 30mm to 400mm diameter - **Hollow Bars (Tubes):** 50mm to 300mm OD with various wall thicknesses - **Standard Lengths:** 3-6 meters; custom lengths up to 10 meters available - **Tolerances:** Diameter ±0.3% to ±0.8%; straightness within 1.0mm/meter - **Surface Condition:** As-cast, rough turned, or precision turned finishes available ## **8. Machining & Fabrication Guidelines** ### **Recommended Cutting Parameters:** | Operation | Speed (m/min) | Feed (mm/rev) | Depth of Cut (mm) | Tool Material | |-----------|--------------|---------------|-------------------|--------------| | Turning | 120 - 180 | 0.20 - 0.40 | 2.0 - 5.0 | C2-C6 Carbide | | Drilling | 25 - 35 | 0.15 - 0.25 | - | HSS or Carbide | | Milling | 80 - 120 | 0.15 - 0.30 | 1.5 - 3.0 | Carbide | | Tapping | 8 - 15 | - | - | HSS with TiN coating | | Boring | 100 - 150 | 0.10 - 0.25 | 1.5 - 3.0 | Carbide | ### **Tooling Recommendations:** - **Insert Grades:** C2-C6 carbide with sharp cutting edges - **Tool Geometry:** Positive rake angles (5-15°) - **Coatings:** TiN, TiCN, or Al₂O₃ for improved tool life - **Coolant:** Water-soluble oils or synthetic coolants recommended - **Chip Control:** Good chip breaking characteristics ### **Special Machining Considerations:** 1. **Thread Machining:** Excellent thread quality achievable 2. **Deep Hole Drilling:** Good chip evacuation; use peck drilling for holes >8× diameter 3. **Boring Operations:** Stable cutting with minimal chatter 4. **Surface Finishing:** Can achieve fine surface finishes with proper techniques ### **Fabrication & Joining:** - **Welding:** Possible with proper procedures (pre-heat, suitable filler metals) - **Machining After Welding:** Annealing may be required for critical applications - **Mechanical Joining:** Excellent for threaded connections and press fits - **Adhesive Bonding:** Good surface for structural adhesives ## **9. Quality Assurance & Testing** ### **Comprehensive Quality Protocol:** 1. **Chemical Analysis:** Complete spectroscopic analysis for each melt 2. **Microstructural Evaluation:** Regular checks of nodularity, nodule count, and matrix 3. **Mechanical Testing:** Tensile tests from each production lot (minimum 3 bars) 4. **Hardness Testing:** Multiple readings along bar length and cross-section 5. **Non-Destructive Testing:** Ultrasonic testing for bars >75mm diameter 6. **Dimensional Inspection:** Full geometric verification ### **Certification & Traceability:** - **Full Traceability:** From raw materials to finished annealed bars - **Material Certificates:** EN 10204 3.1 certificates standard - **Annealing Records:** Complete heat treatment documentation - **Statistical Process Control:** Real-time monitoring of all critical parameters ### **Additional Testing (Available):** - **Charpy Impact Testing:** At various temperatures - **Fatigue Testing:** For dynamic load applications - **Pressure Testing:** For pressure-containing applications - **Metallographic Analysis:** Detailed microstructural evaluation ## **10. Comparative Analysis** ### **vs. As-Cast Ductile Iron (EN-GJS-400-15):** | Parameter | Unibar 400-15 (Annealed) | Conventional As-Cast | Advantage | |-----------|-------------------------|---------------------|-----------| | **Ductility** | 15-25% | 10-18% | Superior | | **Impact Toughness** | 12-20 J | 8-15 J | Better | | **Hardness Uniformity** | ±10 HB | ±30 HB | More Consistent | | **Residual Stress** | Very Low | Moderate to High | Better Stability | | **Machinability** | Excellent | Good | Superior | ### **vs. Other Engineering Materials:** | Material | Tensile (MPa) | Elongation (%) | Impact (J) | Machinability | Cost Index | |----------|---------------|---------------|------------|---------------|------------| | **Unibar 400-15** | 400-480 | 15-25 | 12-20 | Excellent | 1.0 | | **Steel 1045 Normalized** | 585-700 | 12-20 | 20-30 | Good | 0.9-1.1 | | **Aluminum 6061-T6** | 240-310 | 8-12 | 10-15 | Excellent | 1.8-2.2 | | **Stainless 304** | 515-620 | 40-50 | 100+ | Fair | 3.0-4.0 | ## **11. Economic & Sustainability Benefits** ### **Cost Analysis:** - **Material Cost:** Competitive with forged steel alternatives - **Machining Cost:** 20-30% lower than steel due to better machinability - **Tool Life:** 30-40% longer than machining pearlitic ductile iron - **Scrap Rate:** Typically 2-4% in production machining - **Total Cost:** Often 15-25% lower than equivalent steel components ### **Sustainability Advantages:** 1. **Material Efficiency:** Continuous casting achieves 90-95% yield 2. **Energy Efficiency:** Lower melting temperature than steel 3. **Recyclability:** 100% recyclable with established infrastructure 4. **Waste Reduction:** Minimal machining swarf compared to steel 5. **Long Service Life:** Excellent corrosion resistance and durability 6. **Lightweight Potential:** Can replace heavier steel components ### **Environmental Compliance:** - **REACH Compliant:** Meets EU chemical regulations - **RoHS Compliant:** Free from restricted substances - **ISO 14001:** Manufactured in environmentally certified facilities - **Carbon Footprint:** Lower than equivalent steel production ## **12. Technical Support & Services** ### **United Cast Bar Technical Support:** 1. **Material Selection:** Assistance choosing optimal grade for specific applications 2. **Design Support:** Engineering guidance for ductile iron components 3. **Process Optimization:** Machining parameter recommendations 4. **Troubleshooting:** Technical assistance for production issues 5. **Training Programs:** Workshops on ductile iron machining and applications ### **Value-Added Services:** - **Pre-Machining:** Rough machining to customer specifications - **Heat Treatment:** Additional thermal processing if required - **Cutting Services:** Precision cut-to-length - **Quality Documentation:** Comprehensive test reports and certifications - **Supply Chain Integration:** Inventory management solutions ## **Conclusion** **United Cast Bar Unibar 400-15** represents a premium engineering material that combines the manufacturing advantages of continuous casting with the superior mechanical properties of fully annealed ductile iron. Its exceptional combination of strength, ductility, and consistency makes it an ideal choice for demanding applications across multiple industries. The material's compliance with international standards (EN-GJS-400-15, ASTM 60-40-18 equivalent), combined with United's comprehensive quality assurance and technical support, provides engineers with a reliable, high-performance material solution. **Key Advantages:** - Excellent strength-ductility balance - Superior impact resistance and toughness - Excellent machinability in annealed condition - Good pressure tightness and weldability - Consistent properties and dimensional stability - Cost-effective alternative to forged steel components **Recommended Applications:** - Pressure-containing components requiring high integrity - Automotive and transportation components subject to dynamic loads - Industrial machinery requiring good toughness and machinability - Energy sector components needing reliability and durability - Any application where the combination of strength and ductility is critical For organizations seeking to optimize performance, reduce costs, and improve manufacturing efficiency, Unibar 400-15 offers a proven material solution backed by United's expertise in continuous casting and heat treatment technology. -:- For detailed product information, please contact sales. -: United Cast Bar Unibar 400-15 Fully Annealed Continuously Cast Spheroidal Graphite Iron Specification Dimensions Size： Diameter 20-1000 mm Length <6652 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 400-15 Fully Annealed Continuously Cast Spheroidal Graphite Iron Properties -:- For detailed product information, please contact sales. -:

Applications of United Cast Bar Unibar 400-15 Fully Annealed Continuously Cast Spheroidal Graphite Iron Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers United Cast Bar Unibar 400-15 Fully Annealed Continuously Cast Spheroidal Graphite Iron Tube -:- For detailed product information, please contact sales. -:

Packing of United Cast Bar Unibar 400-15 Fully Annealed Continuously Cast Spheroidal Graphite 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 3123 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