Iron Sheet,Plate tension grade 80-55-06

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

Ductile Iron tension grade 80-55-06 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron – Tensile Grade 80-55-06 (High-Strength, Pearlitic)** --- #### **1. Product Overview** **Tensile Grade 80-55-06** is a **high-strength, predominantly pearlitic ductile iron** defined by its guaranteed mechanical properties: **minimum 80 ksi (550 MPa) tensile strength, 55 ksi (380 MPa) yield strength, and 6% elongation**. This designation represents a **premium engineering grade** that delivers significantly elevated strength and hardness while maintaining controlled ductility. It is engineered for applications where components face **high static and dynamic stresses, severe wear, or require weight reduction through higher allowable design stresses**. Achieving these properties typically requires a **normalizing heat treatment** to produce a refined, consistent pearlitic matrix, resulting in exceptional fatigue strength and load-bearing capacity. --- #### **2. Governing International Standards** This high-performance tensile grade is recognized under all major international standards. * **Primary Standard: ASTM A536** - *Standard Specification for Ductile Iron Castings*. Formally designated as **Grade 80-55-06**. * **Global Equivalents:** * **ISO 1083 / EN 1563:** **EN-GJS-600-5** (600 MPa tensile, 370 MPa yield, 5% elongation). This is the direct functional and commercial equivalent. * **SAE J434c (Automotive):** **Grade D5506**. * **JIS G5502 (Japan):** **FCD600**. * **GB/T 1348 (China):** **QT600-3** (Note: Chinese standard elongation differs; specify properties directly). * **UNS Designation:** **F34100**. * **Key Referenced Testing Standards:** * **Tensile Test:** ASTM E8 / ISO 6892-1 * **Hardness:** ASTM E10 / ISO 6506 (Brinell) * **Microstructure:** ASTM A247 / ISO 945 --- #### **3. Typical Chemical Composition (Normalized Condition)** Chemistry is designed to respond effectively to normalizing, producing a strong, pearlitic microstructure. Alloying is often required. | Element | Target Range (%) | Functional Role | | :--- | :--- | :--- | | **Carbon (C)** | 3.4 - 3.7 | Slightly lower than ferritic grades to strengthen the metallic matrix. | | **Silicon (Si)** | 2.0 - 2.4 | Controlled to limit ferrite formation and achieve target pearlite content post-normalizing. | | **Manganese (Mn)** | **0.30 - 0.60** | A key pearlite stabilizer. Ensures a fully pearlitic structure, especially in the core of thicker sections. | | **Phosphorus (P)** | **≤ 0.04** | Kept low. | | **Sulfur (S)** | **≤ 0.015** | Kept very low. | | **Magnesium (Mg)** | 0.03 - 0.05 (Residual) | Essential for nodulization. | | **Copper (Cu)** | **0.40 - 0.80** | **Primary alloying element.** A strong and uniform pearlite promoter, critical for achieving consistent high strength and hardness. | | **Molybdenum (Mo)** | **0 - 0.25** | Often added to increase hardenability in heavy sections, preventing unwanted ferrite and ensuring through-thickness properties. | | **Tin (Sn)** | 0 - 0.10 | Potent pearlite stabilizer; used in small amounts for section uniformity. | | **Chromium (Cr)** | **≤ 0.10** | Strictly limited to avoid excessive carbide formation. | --- #### **4. Physical & Mechanical Properties** This grade is defined by high strength, excellent fatigue resistance, and good wear properties. | Property | Minimum Requirement / Typical Value | Standard & Significance | | :--- | :--- | :--- | | **Tensile Strength, min.** | **550 MPa (80,000 psi)** | ASTM A536 / ISO 1083 | | **Yield Strength (0.2% offset), min.** | **380 MPa (55,000 psi)** | **High yield strength** provides a significant safety margin against permanent deformation and allows for more efficient, lightweight designs. | | **Elongation, min.** | **6%** (in 2 inches / 50 mm) | Maintains measurable ductility, important for absorbing shock loads and stress concentrations. | | **Hardness (Brinell)** | **207 - 255 HBW** | Guaranteed range. The higher hardness provides excellent resistance to abrasion and adhesive wear. | | **Modulus of Elasticity** | 165 - 172 GPa (24 - 25 x 10⁶ psi) | High stiffness, beneficial for components requiring dimensional stability under load. | | **Charpy Impact (Unnotched) @ 21°C** | **15 - 25 J (Typical)** | Adequate impact resistance for many high-strength applications. | | **Fatigue Endurance Limit** | **~260 - 290 MPa** (≈ 0.47-0.53 x UTS) | **A standout feature.** Excellent fatigue strength, making it ideal for cyclically loaded parts like crankshafts and gears. | | **Density** | 7.1 - 7.2 g/cm³ (0.256 lb/in³) | | | **Typical Microstructure** | **Predominantly Pearlite (>80%)** matrix with **Spheroidal Graphite** (Nodularity >85%, Types I & II). Minor "bull's eye" ferrite may surround nodules. | The refined pearlite from normalizing is responsible for the high strength and fatigue resistance. | --- #### **5. Product Applications** Tensile Grade 80-55-06 is specified for highly stressed, safety-critical components in demanding environments. * **Automotive & Heavy-Duty Truck Powertrain:** **Crankshafts (especially for mid-range diesel engines), camshafts, differential carriers, ring gears, transmission gears, and clutch components.** * **Off-Highway & Construction Equipment:** **Drive gears, track rollers and links for excavators, hydraulic pump bodies, and axle components.** * **Industrial Machinery:** **Compressor crankshafts, high-pressure valve bodies, press columns, machine tool spindles, and heavy-duty rolls.** * **Agriculture:** **Final drive gear housings, combine harvester gearboxes, and high-stress implement components.** * **Energy:** **Gearbox components for wind turbines** where high fatigue strength under variable loads is essential. --- #### **6. Fabrication & Quality Notes** * **Condition:** **Typically Supplied Normalized.** The standard production route involves heating to 870-900°C, followed by air cooling. This is critical to develop the uniform pearlitic structure that delivers the specified properties. * **Machinability:** **Fair to Good.** More demanding than ferritic grades due to the harder pearlitic matrix. Requires appropriate tool materials (carbide is common), rigid setups, and correct machining parameters. * **Weldability:** **Poor.** Not recommended for fabrication. If repair is unavoidable, it requires extreme caution: high pre-heat (500-600°C), specialized nickel-based filler metals (e.g., ENiFe-CI), controlled interpass temperature, and mandatory post-weld stress relief. * **Quality Assurance:** Requires rigorous process control. Testing of **separately cast test bars** is standard. Heat treatment certification is often requested. --- #### **7. Ordering Information** **Specify:** **"Ductile Iron Castings, Tensile Grade 80-55-06 (ASTM A536 80-55-06), Normalized Condition."** **Essential Details to Provide:** * **Applicable Standard** (e.g., ASTM A536). * **Part Drawing & Specification.** * **Explicit Statement of Heat Treatment:** "Normalized". * **Certification Requirements:** Mill Test Report (MTR) with chemistry, tensile properties, hardness, and often microstructure verification (pearlite content). * **Special Requirements:** Any need for non-destructive testing (NDT) such as magnetic particle or ultrasonic inspection, especially for critical areas. **Tensile Grade 80-55-06 represents a premium engineering material, offering a near-ideal balance of very high strength, excellent 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 tension grade 80-55-06 Specification Dimensions Size： Diameter 20-1000 mm Length <6533 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 tension grade 80-55-06 Properties -:- For detailed product information, please contact sales. -:

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

Packing of Ductile Iron Sheet/Plate tension 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 3004 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