Iron Wire SAE J434c Grade D5506

Ductile Iron Wire SAE J434c Grade D5506 Product Information -:- For detailed product information, please contact sales. -: Ductile Iron Wire SAE J434c Grade D5506 Synonyms -:- For detailed product information, please contact sales. -:

Ductile Iron SAE J434c Grade D5506 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron (Nodular Iron) – SAE J434c Grade D5506** --- #### **1. Product Overview** SAE J434c Grade **D5506** is a **high-strength, pearlitic-ferritic ductile iron** specification established by the Society of Automotive Engineers (SAE) for critical automotive and heavy-duty transportation components. The "D5506" designation indicates **minimum tensile strength (55 ksi or 380 MPa) and minimum elongation (6%)**. This grade is engineered to provide an optimal balance of **high strength, excellent fatigue resistance, and good wear properties**, while maintaining sufficient ductility for demanding service. It is the SAE equivalent to the widely used **ASTM A536 80-55-06** grade and is typically supplied in the **normalized** condition to achieve a refined, consistent pearlitic microstructure essential for performance under high cyclic loads. --- #### **2. Governing Standards & Specifications** This grade is a staple in automotive material specifications, with clear mappings to international standards. * **Primary Standard: SAE J434c (Current) / SAE J434** - *Ductile Iron Castings*. The grade is designated as **D5506**. * **Direct Cross-Equivalencies:** * **ASTM A536:** **Grade 80-55-06** (80 ksi tensile, 55 ksi yield, 6% elongation). * **ISO 1083 / EN 1563:** **EN-GJS-600-5** (600 MPa tensile, 370 MPa yield, 5% elongation). *Note: This is the functional international equivalent, though minor property differences exist.* * **UNS Designation:** **F34100** * **Key Referenced Testing Standards:** * **Tensile Test:** ASTM E8 / ISO 6892-1 * **Hardness:** ASTM E10 (Brinell) / ASTM E18 (Rockwell) * **Microstructure:** ASTM A247 / ISO 945-1 * **Automotive Quality Protocols:** Mandatory compliance with: * **IATF 16949** (Quality Management System) * **Customer-Specific PPAP (Production Part Approval Process)** requirements, often including CQI-9 (Heat Treat System Assessment). --- #### **3. Typical Chemical Composition** The chemistry is alloyed to ensure a predominantly pearlitic matrix upon normalizing, providing high strength and hardness. | Element | SAE / ASTM Typical Range (%) | Functional Role for D5506 | | :--- | :--- | :--- | | **Carbon (C)** | 3.4 - 3.7 | Provides strength potential; slightly lower than ferritic grades to strengthen the metallic matrix. | | **Silicon (Si)** | 2.0 - 2.4 | Controlled to limit ferrite formation, ensuring target pearlite content after heat treatment. | | **Manganese (Mn)** | 0.3 - 0.6 | Key pearlite stabilizer. Ensures a fully pearlitic structure, especially in heavier sections. | | **Magnesium (Mg)** | 0.03 - 0.05 (Residual) | Essential for spheroidal graphite formation. | | **Copper (Cu)** | **0.4 - 0.8** | **Primary alloying element.** A strong and uniform pearlite promoter, critical for achieving consistent high strength and hardness throughout varying casting sections. | | **Molybdenum (Mo)** | 0 - 0.25 | May be added to increase hardenability in very heavy sections, preventing unwanted ferrite. | | **Chromium (Cr)** | ≤ 0.10 | Strictly limited to avoid excessive carbide formation. | | **Phosphorus (P)** | ≤ 0.04 | Kept low to prevent embrittlement. | | **Sulfur (S)** | ≤ 0.015 | Kept very low. | --- #### **4. Physical & Mechanical Properties** This grade is defined by its high strength and excellent fatigue performance. | Property | SAE J434c D5506 / ASTM 80-55-06 Requirement | Typical Value / Notes | | :--- | :--- | :--- | | **Tensile Strength, min.** | **552 MPa (80,000 psi)** | | | **Yield Strength (0.2% offset), min.** | **379 MPa (55,000 psi)** | High yield strength provides a significant safety margin against permanent deformation. | | **Elongation, min.** | **6%** (in 2 in. / 50 mm) | Maintains measurable ductility, important for absorbing shock loads. | | **Hardness (Brinell)** | **207 - 255 HBW** | Specified range ensures the required wear resistance and machinability balance. | | **Modulus of Elasticity** | 165 - 172 GPa (24 - 25 x 10⁶ psi) | High stiffness, beneficial for components requiring dimensional stability under load. | | **Charpy Impact (Unnotched)** | Not specified by SAE, but typically **15 - 25 J @ 21°C** | Adequate impact resistance for high-strength applications. | | **Fatigue Endurance Limit** | **~260 - 290 MPa** (≈ 0.47-0.53 x UTS) | **A standout feature.** Excellent fatigue strength, making it ideal for cyclically loaded parts like crankshafts. | | **Density** | 7.1 - 7.2 g/cm³ (0.256 lb/in³) | | | **Typical Microstructure (Normalized)** | **Predominantly Pearlite (typically >80%)** with **Spheroidal Graphite** (Nodularity >85%, Types I & II). Minor "bull's eye" ferrite may surround nodules. | The refined pearlite from normalizing is responsible for the high strength and fatigue resistance. | --- #### **5. Product Applications** SAE D5506 is specified for the most highly stressed powertrain and chassis components in vehicles and machinery. * **Powertrain (Primary Application):** **Crankshafts (for mid-range to heavy-duty engines), camshafts, differential cases, ring gears, transmission gears, and clutch components.** Its fatigue strength is critical in these applications. * **Chassis & Suspension:** **Steering knuckles, spindle supports, and heavy-duty hub carriers** for trucks and SUVs. * **Commercial & Off-Highway Vehicles:** **Axle housings, wheel hubs, brake calipers, and hydraulic pump bodies** for construction and agricultural equipment. * **Industrial:** **Compressor crankshafts, high-pressure valve bodies, pump housings, and press components.** --- #### **6. Fabrication & Quality Notes** * **Condition:** **Normalized (Standard).** The standard production route involves heating to 870-900°C, followed by air cooling. This is critical to develop the uniform pearlitic structure that delivers the specified properties. "As-cast" to this grade is not typical and does not guarantee consistent properties. * **Machinability:** **Fair to Good.** More demanding than lower-strength ferritic grades due to the harder pearlitic matrix. Requires appropriate tool materials (carbide is common), rigid setups, and correct feeds/speeds. * **Weldability:** **Poor.** Not recommended for fabrication. If repair is unavoidable, it requires extreme caution: high pre-heat (500-600°C), specialized nickel-based filler metals (e.g., ENiFe-CI), controlled interpass temperature, and mandatory post-weld stress relief. * **Automotive Quality Requirements:** Supply typically mandates: * **Material Certification:** Full MTR per heat/lot, including tensile and hardness data. * **Heat Treatment Documentation:** Certification of normalized cycle parameters. * **First Article Inspection (FAI) & PPAP Submission** at approved levels. * **Non-Destructive Testing (NDT):** 100% magnetic particle inspection (MPI) is common for critical surfaces (e.g., fillets on crankshafts). Ultrasonic testing (UT) may be specified for internal soundness. --- #### **7. Ordering Information** **Specify:** **"Ductile Iron Castings, SAE J434c Grade D5506 (ASTM 80-55-06 equivalent), Normalized Condition."** **Essential Details to Provide:** * **Part Drawing & Specification Number.** * **Explicit Statement of Heat Treatment:** "Normalized". * **Certification Requirements:** MTR including full chemistry, tensile properties, and hardness. * **Quality & Inspection Requirements:** Required PPAP level, specific NDT requirements (e.g., per customer drawing), and any special marking. * **Microstructure Requirement:** May specify a minimum pearlite content (e.g., >80% pearlite). **SAE J434c Grade D5506 (ASTM 80-55-06) is a premium, high-reliability material for automotive engineering, enabling the design of lighter, stronger, and more durable components that withstand the extreme stresses of modern powertrains and heavy-duty applications.** -:- For detailed product information, please contact sales. -: Ductile Iron SAE J434c Grade D5506 Specification Dimensions Size： Diameter 20-1000 mm Length <6526 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. -: Ductile Iron SAE J434c Grade D5506 Properties -:- For detailed product information, please contact sales. -:

Applications of Ductile Iron Wire SAE J434c Grade D5506 -:- For detailed product information, please contact sales. -: Chemical Identifiers Ductile Iron Wire SAE J434c Grade D5506 -:- For detailed product information, please contact sales. -:

Packing of Ductile Iron Wire SAE J434c Grade D5506 -:- 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 2997 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