Iron Sheet,Plate grade 80-55-06

Ductile Iron Sheet/Plate grade 80-55-06 Product Information -:- For detailed product information, please contact sales. -: Ductile Iron Sheet/Plate grade 80-55-06 Synonyms -:- For detailed product information, please contact sales. -:

Ductile Iron grade 80-55-06 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron (Nodular Iron) Grade 80-55-06** --- #### **1. Product Overview** Ductile Iron Grade 80-55-06 is a **high-strength, predominantly pearlitic grade** engineered to deliver superior tensile and yield strength while retaining a valuable degree of ductility. The grade designation defines its minimum mechanical properties: **80 ksi (550 MPa) tensile strength, 55 ksi (380 MPa) yield strength, and 6% elongation**. This grade is typically produced through a **normalizing heat treatment** to achieve a consistent, refined pearlitic matrix, resulting in excellent **fatigue strength, wear resistance, and stiffness**. It serves as a critical upgrade from lower-strength grades like 65-45-12 for applications subjected to higher stresses, more severe wear, or where component lightweighting through higher allowable stresses is desired. #### **2. Governing International Standards** This high-performance grade is recognized under major international standards, with close alignment between systems. * **Primary Designation: ASTM A536** - *Standard Specification for Ductile Iron Castings*. The grade is designated as **80-55-06**. * **Alternative Designations:** * **ISO 1083:** Designated as **EN-GJS-600-5** or **JS/1050-05** (600 MPa tensile, 370 MPa yield, 5% elongation). This is the closest commercial and technical equivalent, though minor property differences exist. * **EN 1563:** (European Standard) **EN-GJS-600-5**. * **SAE J434:** (Automotive) **D5506** (Note: SAE D5506 covers 80-55-06; D5506 can also cover 80-60-03 depending on elongation specification). * **Key Testing Standards:** * **Tensile Test:** ASTM E8 / ISO 6892-1. * **Microstructure:** ASTM A247 / ISO 945 (High nodularity with a matrix of >80% pearlite is typical). #### **3. Typical Chemical Composition (Normalized Condition)** The chemistry is designed to respond effectively to normalizing, producing a strong, pearlitic microstructure. | Element | Target Range (%) | Functional Role | | :--- | :--- | :--- | | **Carbon (C)** | 3.4 - 3.7 | Slightly lower than ferritic grades to reduce carbon in the matrix, strengthening the pearlite. | | **Silicon (Si)** | 2.0 - 2.4 | Controlled to limit ferrite formation and achieve the target pearlite content post-normalizing. | | **Manganese (Mn)** | 0.3 - 0.6 | A key pearlite stabilizer. Ensures a fully pearlitic structure, especially in the core of thicker sections after normalizing. | | **Magnesium (Mg)** | 0.03 - 0.05 | Essential nodulizing element. | | **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. | | **Phosphorus (P)** | ≤ 0.04 | Kept low. | | **Sulfur (S)** | ≤ 0.015 | Kept very low. | #### **4. Physical & Mechanical Properties** This grade is defined by high strength and good wear resistance. | Property | Minimum / Typical Value | Test Standard & Notes | | :--- | :--- | :--- | | **Tensile Strength, min.** | **80 ksi (550 MPa)** | ASTM A536 | | **Yield Strength (0.2% offset), min.** | **55 ksi (380 MPa)** | High yield strength is a key design advantage, providing a high safety factor against deformation. | | **Elongation, min.** | **6%** (in 2 inches or 50mm) | Maintains measurable ductility, important for absorbing shock loads and stress concentrations. | | **Hardness (Brinell)** | 207 - 255 HBW | Typically 217-241 HBW. The higher hardness contributes to excellent abrasion and adhesive wear resistance. | | **Modulus of Elasticity** | 24 - 25 x 10⁶ psi (165 - 172 GPa) | High stiffness, beneficial for components requiring dimensional stability under load. | | **Charpy Impact (Unnotched) @ 23°C** | 15 - 25 J (Typical) | Adequate impact resistance for many high-strength applications, though lower than ferritic grades. | | **Fatigue Endurance Limit** | ~260 - 290 MPa (≈ 0.47-0.53 x UTS) | **Excellent fatigue performance**, a standout feature of this grade, making it ideal for cyclically loaded parts. | | **Density** | 0.256 lb/in³ (7.1 g/cm³) | | | **Microstructure** | **>80% Pearlite** matrix with **>80% Nodularity**. The balance is typically bull's eye ferrite surrounding the graphite nodules. | The refined pearlite from normalizing is responsible for the high strength and fatigue resistance. | #### **5. Product Applications** Grade 80-55-06 is specified for demanding applications where increased load-bearing capacity, wear life, and fatigue resistance are paramount. * **Automotive & Truck (Primary Market):** **Crankshafts (especially for mid-range engines), camshafts, high-pressure diesel engine cylinder heads, gearbox cases, heavy-duty differential carriers, and ring gears.** Its fatigue strength is critical for powertrain components. * **Heavy Machinery & Construction:** **Drive gears, track rollers and links for excavators, hydraulic pump bodies, compressor crankshafts, and large bearing housings.** * **Industrial Equipment:** **Press columns, machine tool spindles, feed screws, rollers for rolling mills, and heavy-duty valve bodies.** * **Agriculture:** **Final drive gear housings, combine harvester gearboxes, and high-stress implement components.** * **Energy:** **Components for wind turbine gearboxes** where high fatigue strength under variable loads is essential. #### **6. Fabrication & Heat Treatment Notes** * **Primary Condition:** **Normalized.** The standard production route involves heating to 870-900°C, followed by air cooling. This refines the grain structure, ensures a uniform and controlled pearlitic matrix, and optimizes the mechanical properties, particularly fatigue strength. * **Machinability:** **Fair to Good.** More demanding than ferritic grades but generally good for its strength level. The pearlitic structure is abrasive, requiring appropriate tool materials (e.g., carbide) and coolants. * **Weldability:** **Poor.** Not recommended for fabrication. Repair welding is possible but requires extreme caution: high pre-heat (500-600°C), specialized nickel-based filler metals, controlled interpass temperature, and mandatory post-weld stress relief to avoid cracking in the hardened heat-affected zone (HAZ). #### **7. Ordering Information** Specify: **"Ductile Iron Castings, ASTM A536 Grade 80-55-06 (Normalized)"**. Key details to include: * **Condition:** Explicitly state "Normalized". * **Drawing/Part Specification.** * **Required certifications:** Foundry Test Report must include tensile properties and hardness. Microstructure verification (pearlite content) is often requested. * **Special Requirements:** For critical components, specify non-destructive testing (NDT) such as ultrasonic testing for internal soundness or magnetic particle inspection for surface quality. Fatigue testing may be specified for validation. **Grade 80-55-06 represents a premium engineering material, offering a near-ideal balance of very high strength, good fatigue resistance, and retained ductility, making it a first-choice upgrade for components where performance limits are being pushed.** -:- For detailed product information, please contact sales. -: Ductile Iron grade 80-55-06 Specification Dimensions Size： Diameter 20-1000 mm Length <6521 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 grade 80-55-06 Properties -:- For detailed product information, please contact sales. -:

Applications of Ductile Iron Sheet,Plate grade 80-55-06 -:- For detailed product information, please contact sales. -: Chemical Identifiers Ductile Iron Sheet,Plate grade 80-55-06 -:- For detailed product information, please contact sales. -:

Packing of Ductile Iron Sheet/Plate grade 80-55-06 -:- 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 2992 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