Malleable Iron Sheet,Plate casting, Class 40010

Malleable Iron Sheet/Plate casting, Class 40010 Product Information -:- For detailed product information, please contact sales. -: Malleable Iron Sheet/Plate casting, Class 40010 Synonyms -:- For detailed product information, please contact sales. -:

Malleable iron casting, Class 40010 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: Malleable Iron Casting, Class 40010 (ASTM A220)** **1. Overview** **Class 40010** is a standardized grade of **Pearlitic Malleable Iron**, as defined by the ASTM International specification **A220/A220M**. This class represents a significant evolution from ferritic grades (like 32510 and 35018), offering a distinctive combination of **higher strength and hardness while maintaining useful ductility**. The "40010" designation indicates a **minimum tensile strength of 400 MPa (58,000 psi) and a minimum elongation of 10%**. This is achieved through a controlled heat treatment (malleablization and subsequent air quenching) that produces a microstructure of temper carbon aggregates in a matrix of **pearlite** (a lamellar mixture of ferrite and iron carbide). This structure makes Class 40010 the workhorse grade for automotive and industrial components requiring superior strength, wear resistance, and moderate toughness. **2. Key International Standards** * **Primary Standard:** **ASTM A220 / A220M** - Standard Specification for Pearlitic Malleable Iron Castings. This is the governing specification for Class 40010. * **Related/Equivalent Standards:** * **ISO 5922:** International standard for malleable cast irons. Class 40010 is broadly equivalent to **ISO 5922 JMB 400-10**. * **SAE J158:** Society of Automotive Engineers specifications covering malleable iron castings. * **EN 1562:** European standard. Class 40010 is similar to **EN-GJMB-400-10**. * **GB/T 9440:** Chinese national standard (**JMB 400**). **3. Typical Chemical Composition** The base composition is similar to ferritic grades but is specifically tailored and may include alloying elements to ensure the desired pearlitic matrix forms during heat treatment. | Element | Typical Range (%) | Purpose/Effect | | :--- | :--- | :--- | | **Carbon (C)** | 2.20 - 2.90 | Provides carbon for temper carbon formation. | | **Silicon (Si)** | 1.20 - 1.80 | Graphitizing agent; higher than in some ferritic grades to ensure full first-stage graphitization. | | **Manganese (Mn)** | 0.60 - 1.20 | **Significantly higher than ferritic grades.** Critical for increasing hardenability to form pearlite upon air cooling. | | **Sulfur (S)** | ≤ 0.12 max | Controlled impurity. | | **Phosphorus (P)** | ≤ 0.12 max | Controlled impurity. | | **Chromium (Cr)** | May be added (≤0.25) | Used selectively to further increase hardenability and strength. | | **Molybdenum (Mo)** | May be added (≤0.15) | Added for enhanced hardenability, especially in heavier sections. | *Note: The key differentiator from ferritic grades is the higher **manganese** content, which is essential for suppressing ferrite formation and promoting the pearlitic microstructure.* **4. Physical & Mechanical Properties (Per ASTM A220)** | Property | Minimum Requirement (ASTM A220) | Typical Value / Significance | | :--- | :--- | :--- | | **Tensile Strength** | **58,000 psi** (400 MPa) | High load-bearing capacity. | | **Yield Strength (0.2% Offset)** | **45,000 psi** (310 MPa) | Very good resistance to permanent deformation. | | **Elongation (in 2")** | **10%** | Maintains good ductility and toughness despite high strength. | | **Brinell Hardness** | 187 - 241 HB (Typical range) | **Significantly higher than ferritic grades**, providing excellent **wear and abrasion resistance**. | | **Modulus of Elasticity** | - | ~25 x 10⁶ psi (172 GPa). | | **Fatigue Strength** | - | **High**; excellent for components under cyclic loading (e.g., crankshafts). | | **Impact Resistance** | - | Good at room temperature, though generally lower than high-elongation ferritic grades (e.g., 35018). | | **Machinability** | - | **Good**, but lower than ferritic malleable iron due to higher hardness and pearlitic structure. | **5. Product Applications** Class 40010 is the most widely used pearlitic malleable iron grade, ideal for **high-stress, wear-prone applications** where a balance of strength and toughness is paramount. * **Automotive & Truck (Primary Market):** * **Crankshafts:** For mid-range diesel and gasoline engines, leveraging its high fatigue strength. * **Camshafts:** Utilizing good wear resistance. * **Differential Carriers & Gears:** Replacing more expensive forged components. * **Universal Joint Yokes, Hubs, and Wheel Hubs.** * **Steering Knuckles and Suspension Components.** * **Agricultural & Heavy Equipment:** * **Tractor Transmission Gears and Sprockets.** * **Implement Axles, Levers, and High-Strength Linkages.** * **Railroad:** * **Coupler Parts, Journal Boxes, and Brake Components.** * **Industrial Machinery:** * **Gears, Sprockets, Chain Links.** * **Pump Housings, Compressor Parts.** * **Valve Bodies for higher-pressure applications.** **6. Heat Treatment Process** The production of Class 40010 involves a two-stage process: 1. **First-Stage Graphitization:** Similar to ferritic iron, the white iron casting is heated to ~900-950°C to decompose cementite into temper carbon. 2. **Controlled Cooling (Air Quenching):** Instead of slow cooling through the lower critical temperature, the casting is cooled in air. The higher manganese content allows the remaining austenite to transform into **pearlite** rather than ferrite. A subsequent **tempering** may be used to adjust final hardness and stress relief. **7. Advantages and Limitations** **Advantages:** * **Excellent Strength-to-Weight Ratio:** High strength with lower density than steel. * **Superior Wear & Fatigue Resistance:** Ideal for moving, load-bearing parts. * **Good Ductility & Impact Resistance:** Maintains toughness despite high strength. * **Good Machinability (Relative):** Still more machinable than many cast steels. * **Cost-Effective:** Often a more economical alternative to forged steel components. **Limitations:** * **Lower Ductility than Ferritic Grades:** Less suitable for very high shock-load applications than Class 35018. * **More Complex Heat Treatment:** Requires precise control of cooling rates. * **Section Sensitivity:** Properties can vary with casting wall thickness due to hardenability limits. * **Machinability:** Reduced compared to softer ferritic malleable irons. **Conclusion** **ASTM A220 Class 40010 Pearlitic Malleable Iron** is a premier engineering material that successfully bridges the gap between the high-ductility ferritic malleable irons and the very high-strength (but lower ductility) pearlitic grades. Its optimized balance of **400 MPa tensile strength, 10% elongation, and excellent wear/fatigue performance** has made it the material of choice for countless critical components in the automotive powertrain and chassis. It remains a highly relevant and cost-competitive solution for designing durable, high-performance cast parts. -:- For detailed product information, please contact sales. -: Malleable iron casting, Class 40010 Specification Dimensions Size： Diameter 20-1000 mm Length <6576 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 40010 Properties -:- For detailed product information, please contact sales. -:

Applications of Malleable Iron Sheet,Plate casting, Class 40010 -:- For detailed product information, please contact sales. -: Chemical Identifiers Malleable Iron Sheet,Plate casting, Class 40010 -:- For detailed product information, please contact sales. -:

Packing of Malleable Iron Sheet/Plate casting, Class 40010 -:- 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 Sheet/Plate 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 3047 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