Iron Wire SAE J434c Grade D4512

Ductile Iron Wire SAE J434c Grade D4512 Product Information -:- For detailed product information, please contact sales. -: Ductile Iron Wire SAE J434c Grade D4512 Synonyms -:- For detailed product information, please contact sales. -:

Ductile Iron SAE J434c Grade D4512 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron (Nodular Iron) – SAE J434c Grade D4512** --- #### **1. Product Overview** SAE J434c Grade **D4512** is a widely specified **ferritic-pearlitic ductile iron** grade established by the Society of Automotive Engineers (SAE) for demanding automotive and transportation applications. The "D4512" designation follows the SAE nomenclature where the numbers indicate **minimum tensile strength (45 ksi or 310 MPa) and minimum elongation (12%)**. This grade provides an optimal balance of **higher strength, good stiffness, and moderate ductility**, making it suitable for components that experience significant static and dynamic loads while requiring reliability and fatigue resistance. It is the SAE equivalent to the prevalent **ASTM A536 65-45-12** grade and serves as a versatile, high-performance material for structural and drivetrain components. --- #### **2. Governing Standards & Specifications** This grade is defined within the automotive material ecosystem, with clear linkages to broader international standards. * **Primary Standard: SAE J434c (Current) / SAE J434** - *Ductile Iron Castings*. The grade is designated as **D4512**. * **Direct Cross-Equivalencies:** * **ASTM A536:** **Grade 65-45-12** (65 ksi tensile, 45 ksi yield, 12% elongation). * **ISO 1083 / EN 1563:** **EN-GJS-500-7** (500 MPa tensile, 320 MPa yield, 7% elongation). *Note: While the elongation spec differs, D4512/65-45-12 is the functional and commercial equivalent in North America.* * **UNS Designation:** **F33100** * **Key Referenced Testing Standards:** * **Tensile Test:** ASTM E8 / ISO 6892-1 * **Hardness:** ASTM E10 (Brinell) * **Microstructure:** ASTM A247 / ISO 945-1 * **Automotive Quality Protocols:** Often required in conjunction with: * **IATF 16949** (Quality Management for Automotive) * **Customer-Specific PPAP (Production Part Approval Process)** requirements. --- #### **3. Typical Chemical Composition** The chemistry is balanced to achieve a mixed ferritic-pearlitic matrix, providing strength without excessive alloying. | Element | SAE J434c / ASTM Typical Range (%) | Functional Role for D4512 | | :--- | :--- | :--- | | **Carbon (C)** | 3.5 - 3.8 | Ensures castability and provides graphite for lubrication and stress relief. | | **Silicon (Si)** | 2.2 - 2.6 | Solid solution strengthener and ferrite promoter. Level is balanced to achieve the target matrix. | | **Manganese (Mn)** | 0.15 - 0.35 | Primary pearlite stabilizer. Controlled to develop the required pearlite content (typically 40-70%) without excessive segregation. | | **Phosphorus (P)** | ≤ 0.04 | Kept low to prevent embrittling phosphide networks. | | **Sulfur (S)** | ≤ 0.02 | Kept very low. | | **Magnesium (Mg)** | 0.03 - 0.05 (Residual) | Essential for spheroidal graphite formation. | | **Copper (Cu)** | ≤ 0.30 (Optional) | May be added in small amounts to promote more uniform pearlite, especially in heavier sections. | | **Chromium (Cr)** | ≤ 0.10 | Strictly limited as a strong carbide former. | | **Nickel (Ni)** | Report | May be present as a trace element. | | **Molybdenum (Mo)** | ≤ 0.10 | Rarely added; if present, it's for hardenability in very thick sections. | --- #### **4. Physical & Mechanical Properties** This grade offers a robust combination of properties suitable for highly stressed components. | Property | SAE J434c D4512 / ASTM 65-45-12 Requirement | Typical Value / Notes | | :--- | :--- | :--- | | **Tensile Strength, min.** | **448 MPa (65,000 psi)** | | | **Yield Strength (0.2% offset), min.** | **310 MPa (45,000 psi)** | Provides a high safety margin against plastic deformation. | | **Elongation, min.** | **12%** (in 2 in. / 50 mm) | Substantial ductility for absorbing shock and stress concentrations. | | **Hardness (Brinell)** | **170 - 207 HBW** | Specified range ensures consistency and machinability. | | **Modulus of Elasticity** | 165 - 172 GPa (24 - 25 x 10⁶ psi) | High stiffness, beneficial for structural components. | | **Charpy Impact (Unnotched)** | Not specified by SAE, but typically **20-35 J @ 21°C** | Good impact resistance for its strength level. | | **Fatigue Endurance Limit** | ~230 - 250 MPa (≈ 0.5-0.55 x UTS) | Good fatigue performance for cyclically loaded parts. | | **Density** | 7.1 - 7.2 g/cm³ (0.256 lb/in³) | | | **Typical Microstructure** | **Mixed Matrix** of **Pearlite (40-70%) and Ferrite**, with **Spheroidal Graphite** (Nodularity >80%, Types I & II). | The pearlite provides strength; the ferrite provides ductility and toughness. | --- #### **5. Product Applications** SAE D4512 is a workhorse material in the automotive and heavy equipment sectors for components requiring a balance of strength and integrity. * **Automotive Drivetrain:** **Differential cases, carrier housings, transmission cases, axle supports, drive flanges, and flywheel housings.** * **Steering & Suspension:** **Steering knuckles, control arm brackets, and heavy-duty tie-rod ends.** * **Engine Components:** **Turbocharger housings, exhaust manifolds (lower-temp), engine mounting brackets.** * **Commercial & Off-Highway Vehicles:** **Heavy-duty wheel hubs, brake calipers for trucks, agricultural gearbox housings, and hydraulic valve bodies.** * **Industrial Machinery:** **Pump casings, compressor bodies, press frames, and general high-strength brackets and housings.** --- #### **6. Fabrication & Quality Notes** * **Condition:** Typically supplied **as-cast** (achieved via chemistry and cooling control) or **normalized** to ensure more consistent properties throughout the casting, especially for complex geometries. * **Machinability:** **Very Good to Excellent.** The mixed microstructure offers a favorable combination of strength and chip-breaking characteristics, leading to good tool life and surface finish. * **Weldability:** **Fair to Poor.** Standard precautions for ductile iron apply: high pre-heat (400-500°C), use of nickel-iron electrodes (e.g., ENi-CI), and controlled post-weld cooling with stress relief. Welding is generally for repair only. * **Automotive Quality Requirements:** Supply often mandates: * **Material Certification:** Full MTR (Mill Test Report) per heat/lot. * **First Article Inspection (FAI) & PPAP Submission.** * **Statistical Process Control (SPC)** data for key characteristics (hardness, nodularity). * **Non-Destructive Testing (NDT)** as specified on drawing (e.g., magnetic particle inspection for critical surfaces). --- #### **7. Ordering Information** **Specify:** **"Ductile Iron Castings, SAE J434c Grade D4512 (ASTM 65-45-12 equivalent)"**. **Essential Details to Provide:** * **Part Drawing & Specification Number.** * **Required Condition:** As-cast or Normalized (if a preference). * **Certification Requirements:** MTR including chemistry, tensile properties, and hardness. * **Quality & Inspection Requirements:** Any specific PPAP level, dimensional reporting, or NDT requirements (e.g., per customer drawing or CQI-9 for heat treat audit). * **Marking Requirements:** Part identification and material grade marking as per SAE J434c. **SAE J434c Grade D4512 (ASTM 65-45-12) is a cornerstone material for automotive engineering, providing a reliable, cost-effective, and high-performance solution for a vast array of structural and moving components.** -:- For detailed product information, please contact sales. -: Ductile Iron SAE J434c Grade D4512 Specification Dimensions Size： Diameter 20-1000 mm Length <6525 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 D4512 Properties -:- For detailed product information, please contact sales. -:

Applications of Ductile Iron Wire SAE J434c Grade D4512 -:- For detailed product information, please contact sales. -: Chemical Identifiers Ductile Iron Wire SAE J434c Grade D4512 -:- For detailed product information, please contact sales. -:

Packing of Ductile Iron Wire SAE J434c Grade D4512 -:- 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 2996 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