Malleable Iron Wire casting, Class 50005

Malleable Iron Wire casting, Class 50005 Product Information -:- For detailed product information, please contact sales. -: Malleable Iron Wire casting, Class 50005 Synonyms -:- For detailed product information, please contact sales. -:

Malleable iron casting, Class 50005 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: Malleable Iron Casting, Class 50005** **1. Overview** **Class 50005** represents a premier high-strength grade of **Pearlitic Malleable Iron**, defined under standards such as **ASTM A220** or more specifically **ASTM A602** for automotive applications. It achieves the highest tier of mechanical performance in standardized malleable iron grades, characterized by a minimum tensile strength of **500 MPa (72,500 psi)** and a minimum elongation of **5%**. This class is engineered through an advanced metallurgical process that often involves a quenching and tempering heat treatment cycle, resulting in a microstructure dominated by **fine pearlite or tempered martensite**. This structure provides exceptional strength, superior wear resistance, and excellent fatigue properties, positioning Class 50005 as a cost-effective alternative to forged or cast low-alloy steel components in the most demanding applications. **2. Key International Standards** * **Primary Standards:** **ASTM A220/A220M** (Standard Specification for Pearlitic Malleable Iron Castings) and **ASTM A602** (Automotive Malleable Iron Castings). ASTM A602 is the most direct reference for this high-performance grade. * **Related/Equivalent Standards:** * **ISO 5922:** **JMB 500-5** is the direct international equivalent. * **SAE J158:** Society of Automotive Engineers specification harmonized with ASTM A602. * **EN 1562:** European standard equivalent **EN-GJMB-500-5**. * **GB/T 9440:** Chinese national standard (**JMB 500** series). **3. Typical Chemical Composition** Achieving Class 50005 properties requires precise chemistry, often involving alloying elements to ensure sufficient hardenability for quenching and to refine the microstructure. | Element | Typical Range (%) | Purpose/Effect | | :--- | :--- | :--- | | **Carbon (C)** | 2.30 - 2.80 | Basis for strength; balanced for castability and heat treatment response. | | **Silicon (Si)** | 1.40 - 2.00 | Strong graphitizer and solid solution strengthener. | | **Manganese (Mn)** | **0.80 - 1.50** | **Critical.** Provides essential hardenability to form a high-strength matrix upon quenching. | | **Chromium (Cr)** | **0.15 - 0.40** | **Commonly added.** Significantly increases hardenability, refines structure, and enhances strength and wear resistance. | | **Molybdenum (Mo)** | **0.10 - 0.25** (optional) | Powerful hardenability agent, especially beneficial for heavier sections to ensure uniformity. | | **Copper (Cu)** | 0.20 - 0.50 (optional) | Aids hardenability and may improve corrosion resistance. | | **Phosphorus (P)** | ≤ 0.10 max | Strictly limited to preserve toughness. | | **Sulfur (S)** | ≤ 0.10 max | Strictly controlled. | **Heat Treatment Distinction:** Unlike lower pearlitic grades that may use controlled air cooling, Class 50005 typically requires **oil quenching** (or intensive forced air cooling) from the austenitizing temperature, followed by a **tempering** process to achieve the optimal combination of strength and toughness. **4. Physical & Mechanical Properties (Per ASTM A602)** | Property | Minimum Requirement (ASTM A602) | Typical Value / Significance | | :--- | :--- | :--- | | **Tensile Strength** | **500 MPa (72,500 psi)** | Exceptional load-bearing capacity, rivaling some low-alloy steels. | | **Yield Strength (0.2% Offset)** | **345 MPa (50,000 psi)** | Very high resistance to permanent deformation. | | **Elongation (in 2")** | **5%** | Maintains a critical level of ductility for engineering safety in high-strength design. | | **Brinell Hardness** | 241 - 285 HB (Typical) | **Very high hardness**, providing outstanding **wear and abrasion resistance**. | | **Fatigue Strength** | -- | **Exceptional;** often 40-45% of tensile strength, ideal for highly stressed, cyclically loaded parts. | | **Impact Resistance** | -- | Adequate for designed service conditions but lower than more ductile malleable iron grades. | | **Machinability** | -- | **Fair.** Requires appropriate tooling (carbide) and parameters due to high hardness. | **5. Product Applications** Class 50005 is specified for the most severe, high-stress applications where failure is not an option and where its properties provide a cost/performance advantage over steel. * **Automotive & Heavy-Duty Trucking (Primary Use):** * **Crankshafts:** For high-torque diesel and performance gasoline engines. * **Camshafts:** Leveraging high wear resistance under high valve spring pressures. * **Differential Carriers and Ring Gear Blanks** in severe-duty axles. * **Steering Knuckles, Hubs, and Spindles** for heavy trucks and off-road vehicles. * **Transmission Gears and Shafts.** * **Agricultural, Construction & Mining Equipment:** * **Final Drive Gears, Pinions, and Sprockets.** * **Track Rollers, Idlers, and Links** for heavy machinery. * **Drill Bits, Crusher Rolls, and High-Strength Axles.** * **Industrial Machinery:** * **Heavy-Duty Gearbox Gears and Pinions.** * **High-Pressure Pump Components and Valve Bodies.** * **Rolls for conveying and processing equipment.** **6. Advantages and Limitations** **Advantages:** * **Exceptional Strength & Hardness:** The pinnacle of standardized malleable iron performance. * **Superior Wear & Fatigue Life:** Ideal for components subject to high contact stress and cyclic loads. * **Weight & Cost Savings:** Lower density and near-net-shape casting offer advantages over forged steel for complex parts. * **Good Damping Capacity:** Better vibration absorption than steel. **Limitations:** * **Lower Ductility & Toughness:** More brittle than lower-strength grades; sensitive to stress concentrators (notches). * **Complex Manufacturing:** Requires precise chemistry, quenching, and tempering, increasing process control complexity and cost. * **Section Sensitivity:** Significant property gradients can occur in thick sections. * **Weldability:** Generally poor and not recommended. **Conclusion** **Class 50005 Malleable Iron** is the ultimate high-strength solution within the traditional malleable iron family. By pushing tensile strength to **500 MPa** while retaining a **5% elongation** safety margin, it serves a critical niche where component weight, cyclic loading (fatigue), and wear are primary design constraints. Its production demands advanced foundry and heat treatment expertise. When properly applied to well-designed components—particularly in heavy-duty automotive and off-highway equipment—Class 50005 offers an unmatched balance of performance, reliability, and cost-effectiveness compared to alternative materials. -:- For detailed product information, please contact sales. -: Malleable iron casting, Class 50005 Specification Dimensions Size： Diameter 20-1000 mm Length <6579 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. -: Malleable iron casting, Class 50005 Properties -:- For detailed product information, please contact sales. -:

Applications of Malleable Iron Wire casting, Class 50005 -:- For detailed product information, please contact sales. -: Chemical Identifiers Malleable Iron Wire casting, Class 50005 -:- For detailed product information, please contact sales. -:

Packing of Malleable Iron Wire casting, Class 50005 -:- 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 3050 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