Malleable Iron Rod/Bar casting, Class 45006

Malleable Iron Rod casting, Class 45006 Product Information -:- For detailed product information, please contact sales. -: Malleable Iron Rod casting, Class 45006 Synonyms -:- For detailed product information, please contact sales. -:

Malleable iron casting, Class 45006 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: Malleable Iron Casting, Class 45006 (ASTM A220)** **1. Overview** **Class 45006** is a high-strength grade of **Pearlitic Malleable Iron**, as defined by the ASTM International specification **A220/A220M**. It is engineered to deliver **maximum tensile strength** among the commonly standardized pearlitic malleable iron grades, with a minimum requirement of 450 MPa (65,000 psi). The trade-off for this enhanced strength is a controlled reduction in ductility, as indicated by the "06" suffix, which specifies a **minimum elongation of 6%**. This material achieves its properties through a precisely controlled heat treatment that produces a matrix consisting primarily of **fine pearlite**, resulting in outstanding **wear resistance, high fatigue strength, and good machinability**. Class 45006 is the material of choice for the most demanding, high-stress applications where strength and durability are paramount over extreme toughness. **2. Key International Standards** * **Primary Standard:** **ASTM A220 / A220M** - Standard Specification for Pearlitic Malleable Iron Castings. * **Related/Equivalent Standards:** * **ISO 5922:** International standard for malleable cast irons. Class 45006 is equivalent to **ISO 5922 JMB 450-6**. * **SAE J158:** Society of Automotive Engineers specifications for automotive malleable iron castings. * **EN 1562:** European standard. It corresponds to **EN-GJMB-450-6**. * **GB/T 9440:** Chinese national standard (**JMB 450** series). * **JIS G 5705:** Japanese Industrial Standard (**FCMB 450**). **3. Typical Chemical Composition** The composition is similar to Class 45008 but is often optimized with alloying elements to achieve a higher pearlite content and finer structure, ensuring the highest strength levels. | Element | Typical Range (%) | Purpose/Effect | | :--- | :--- | :--- | | **Carbon (C)** | 2.20 - 2.90 | Provides the base carbon for strength and graphitization. | | **Silicon (Si)** | 1.20 - 1.80 | Graphitizing agent; controlled to balance first-stage annealing and final strength. | | **Manganese (Mn)** | 0.80 - 1.40 | **Crucial.** Higher manganese ensures sufficient hardenability to form a fully pearlitic matrix upon air cooling, suppressing ferrite formation. | | **Sulfur (S)** | ≤ 0.12 max | Controlled impurity. | | **Phosphorus (P)** | ≤ 0.12 max | Controlled impurity. | | **Chromium (Cr)** | 0.15 - 0.35 (common) | Frequently added to increase hardenability, refine pearlite, and boost strength and wear resistance. | | **Molybdenum (Mo)** | ≤ 0.20 (optional) | Added for enhanced hardenability, especially in heavier sections, to maintain uniformity. | *Note: The defining feature is the **alloying strategy** (higher Mn, plus Cr/Mo) designed to maximize pearlite content and mechanical strength, often at the expense of some ductility compared to 45008.* **4. Physical & Mechanical Properties (Per ASTM A220)** | Property | Minimum Requirement (ASTM A220) | Typical Value / Significance | | :--- | :--- | :--- | | **Tensile Strength** | **65,000 psi** (450 MPa) | Very high load-bearing capacity. | | **Yield Strength (0.2% Offset)** | **40,000 psi** (276 MPa) | High resistance to permanent deformation. | | **Elongation (in 2")** | **6%** | Maintains a critical level of ductility for engineering safety but is lower than 45008. | | **Brinell Hardness** | 207 - 269 HB (Typical range) | **High hardness**, providing excellent **wear and abrasion resistance**. | | **Fatigue Strength** | - | **Excellent;** among the highest of all malleable irons, ideal for cyclic loading. | | **Impact Resistance** | - | Adequate for many applications but lower than grades with higher elongation (e.g., 40010, 45008). | | **Machinability** | - | **Fair to Good.** More challenging than lower-strength malleable irons due to higher hardness but still machinable with proper tools. | **5. Product Applications** Class 45006 is specified for the most severe service conditions where **strength, wear resistance, and fatigue life are the primary design drivers.** * **Automotive & Heavy-Duty Trucking:** * **Crankshafts:** For high-output diesel and performance gasoline engines. * **Camshafts:** Utilizing high wear resistance. * **Differential Carriers and Ring Gear Blanks:** For heavy towing and hauling applications. * **Steering Knuckles and Spindles** for heavy trucks and SUVs. * **Wheel Hubs and Brake Components** for severe-duty use. * **Agricultural & Construction Equipment:** * **Final Drive Gears, Pinions, and Sprockets** for tractors and combines. * **Track Rollers, Idlers, and Links** for crawler tractors and excavators. * **High-Strength Axles and Pivot Pins.** * **Industrial Machinery:** * **Heavy-Duty Gears and Pinions** in gearboxes and drives. * **Rolls and Guides** in conveying and processing equipment. * **High-Pressure Valve and Pump Components.** **6. Heat Treatment Process** The production involves a specialized heat treatment cycle: 1. **First-Stage Graphitization:** Heating to ~900-950°C to decompose cementite into temper carbon aggregates. 2. **Rapid Controlled Cooling (Air Quenching):** The casting is cooled at a rate fast enough, aided by alloying elements (Mn, Cr), to transform virtually all of the austenite into **fine pearlite**, minimizing free ferrite formation. 3. **Tempering (Often Applied):** A subsequent tempering at 500-600°C is commonly used to relieve stresses, improve toughness slightly, and stabilize the microstructure. **7. Advantages and Limitations** **Advantages:** * **Highest Strength:** Maximum tensile strength among standard pearlitic malleable grades. * **Superior Wear & Fatigue Resistance:** Excellent for components subject to high contact stresses and cyclic loads. * **Good Strength-to-Weight Ratio:** Stronger than many cast steels at a lower density. * **Economic Production:** More cost-effective than forged or fabricated steel parts for complex shapes. **Limitations:** * **Reduced Ductility & Toughness:** Lower impact resistance than grades with higher elongation; less forgiving under severe shock loads. * **Section Sensitivity:** Properties can vary significantly with casting wall thickness; requires careful design. * **More Complex Production:** Requires precise control of chemistry and heat treatment. * **Machinability:** Requires more power and appropriate tooling compared to softer grades. **Conclusion** **ASTM A220 Class 45006 Pearlitic Malleable Iron** is the premium high-strength workhorse of the malleable iron family. By prioritizing **450 MPa tensile strength** while maintaining a **6% elongation** safety margin, it fills a critical niche for components that must withstand extreme operational stresses and wear. While its lower ductility requires more careful design and application analysis compared to 45008 or 40010, its unparalleled strength and durability in a cast form make it an irreplaceable and cost-efficient solution for the core drivetrain and structural components of heavy-duty vehicles and machinery. -:- For detailed product information, please contact sales. -: Malleable iron casting, Class 45006 Specification Dimensions Size： Diameter 20-1000 mm Length <6578 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 45006 Properties -:- For detailed product information, please contact sales. -:

Applications of Malleable Iron Rod casting, Class 45006 -:- For detailed product information, please contact sales. -: Chemical Identifiers Malleable Iron Rod casting, Class 45006 -:- For detailed product information, please contact sales. -:

Packing of Malleable Iron Rod casting, Class 45006 -:- 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 Rod 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 3049 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