Iron Rod/Bar tension grade 60-40-18

Ductile Iron Rod tension grade 60-40-18 Product Information -:- For detailed product information, please contact sales. -: Ductile Iron Rod tension grade 60-40-18 Synonyms -:- For detailed product information, please contact sales. -:

Ductile Iron tension grade 60-40-18 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron – Tensile Grade 60-40-18 (Ferritic)** --- #### **1. Product Overview** **Tensile Grade 60-40-18** refers to the most widely specified **ferritic ductile iron** defined by its guaranteed mechanical properties: **minimum 60 ksi (414 MPa) tensile strength, 40 ksi (276 MPa) yield strength, and 18% elongation**. This designation is the **commercial and engineering shorthand** for the material's performance profile, with "tensile grade" explicitly highlighting its classification by tensile properties. It represents the optimal balance of **high ductility, good impact toughness, and reliable strength**, making it the preferred choice for components that must withstand shock loads, pressure, and dynamic stresses without brittle fracture. The grade is achieved through a **full ferritizing anneal**, resulting in a microstructure that provides excellent machinability and consistent performance. --- #### **2. Governing International Standards** This tensile grade is codified across all major international casting standards, ensuring global recognition and consistency. * **Primary Standard: ASTM A536** - *Standard Specification for Ductile Iron Castings*. Formally designated as **Grade 60-40-18**. * **Global Equivalents:** * **ISO 1083 / EN 1563:** **EN-GJS-400-18** or **JS/1050-06** (400 MPa tensile, 250 MPa yield, 18% elongation). This is the direct metric equivalent. * **SAE J434c (Automotive):** **Grade D4018**. * **JIS G5502 (Japan):** **FCD400**. * **GB/T 1348 (China):** **QT400-18**. * **UNS Designation:** **F32800**. * **Key Referenced Testing Standards:** * **Tensile Test:** ASTM E8 / ISO 6892-1 * **Hardness:** ASTM E10 / ISO 6506 (Brinell) * **Microstructure:** ASTM A247 / ISO 945 (for graphite nodularity and matrix) --- #### **3. Typical Chemical Composition (Annealed Condition)** Chemistry is controlled to ensure a fully ferritic matrix after annealing, emphasizing high purity and graphitization. | Element | Target Range (%) | Functional Role | | :--- | :--- | :--- | | **Carbon (C)** | 3.5 - 3.9 | Ensures castability and provides graphite for stress relief and lubrication. | | **Silicon (Si)** | 2.3 - 2.8 | Primary ferrite stabilizer. Higher levels promote the ferritic matrix but are balanced to avoid low-temperature embrittlement. | | **Manganese (Mn)** | **≤ 0.30** | **Stringently limited.** Minimized to prevent pearlite formation and boundary segregation, which severely reduces ductility and impact toughness. | | **Phosphorus (P)** | **≤ 0.04** | Kept very low to prevent brittle phosphide networks at grain boundaries. | | **Sulfur (S)** | **≤ 0.015** | Kept extremely low to avoid interference with magnesium during nodulization. | | **Magnesium (Mg)** | 0.03 - 0.05 (Residual) | Essential for spheroidal graphite formation. | | **Copper (Cu)** | **≤ 0.10** | Minimized, as it is a potent pearlite promoter. | | **Chromium (Cr)** | **≤ 0.05** | Strictly limited as a strong carbide former. | | **Trace Elements (Sn, Sb, etc.)** | Tightly controlled | Elements that promote pearlite or segregate are minimized via high-purity charge materials. | --- #### **4. Physical & Mechanical Properties** The properties define a high-integrity, ductile engineering material. | Property | Minimum Requirement / Typical Value | Standard & Significance | | :--- | :--- | :--- | | **Tensile Strength, min.** | **414 MPa (60,000 psi)** | ASTM A536 / ISO 1083 | | **Yield Strength (0.2% offset), min.** | **276 MPa (40,000 psi)** | Provides a good safety margin against permanent deformation. | | **Elongation, min.** | **18%** (in 2 inches / 50 mm) | **The defining characteristic.** Exceptional ductility for a cast ferrous material, allowing significant plastic deformation before fracture. | | **Hardness (Brinell)** | **143 - 187 HBW** | Guaranteed range ensures the soft, ferritic structure and excellent machinability. | | **Modulus of Elasticity** | 165 - 172 GPa (24 - 25 x 10⁶ psi) | High stiffness, comparable to steel. | | **Charpy Impact (V-Notch) @ 21°C** | **15 - 25 J (Typical)** | Good impact resistance, suitable for many dynamic load applications. For low-temperature service, a specially controlled "LTS" variant is used. | | **Fatigue Endurance Limit** | ~210 - 240 MPa (≈ 0.5-0.55 x UTS) | Good fatigue performance for cyclically loaded components. | | **Density** | 7.1 - 7.2 g/cm³ (0.256 lb/in³) | Approximately 10% lighter than steel. | | **Microstructure** | **>95% Ferrite** matrix with **Spheroidal Graphite** (Nodularity >85%, Types I & II). Free of massive carbides and excessive pearlite. | The fully ferritic matrix is responsible for the high elongation and toughness. | --- #### **5. Product Applications** Tensile Grade 60-40-18 is specified for safety-critical applications where integrity under sudden load or pressure is paramount. * **Pressure Pipe & Fittings:** **Ductile Iron Pipe (DIP)** for water and sewer mains (per **AWWA C151**). Its ductility withstands ground movement, pressure surges, and beam loading. * **Automotive Safety Components:** **Steering knuckles, differential carriers, axle housings, and brake calipers.** Its toughness absorbs road shock and impact loads. * **Valves & Pump Bodies:** **Hydraulic and waterworks valve bodies, pump casings, and compressor housings** requiring pressure integrity and good machinability. * **Heavy Machinery & Agriculture:** **Tractor front axle supports, gearbox housings, and implement components** subject to shock loading. * **Wind Energy:** **Components for gearboxes and hubs** where a balance of strength and reliability is required. * **General Engineering:** **Press frames, machine tool bases, and heavy-duty brackets** where vibration damping and strength are needed. --- #### **6. Fabrication & Quality Notes** * **Condition:** **Annealed (Ferritized).** A mandatory heat treatment involving austenitizing followed by slow cooling to transform the matrix entirely to ferrite. * **Machinability:** **Excellent.** The soft ferritic matrix and graphite nodules that act as chip breakers result in low cutting forces, long tool life, and superior surface finishes. * **Weldability:** **Fair, with strict procedures.** Not intended for fabrication welding. Repairs require pre-heat (315-650°C), use of nickel-iron electrodes (e.g., ENi-CI, ENiFe-CI), and controlled post-weld cooling with stress relief. * **Quality Assurance:** Standard practice involves testing **separately cast test bars** from each melt. Certifications include chemical analysis and mechanical test reports. --- #### **7. Ordering Information** **Specify:** **"Ductile Iron Castings, Tensile Grade 60-40-18 (ASTM A536 60-40-18), Annealed Condition."** **Essential Details to Provide:** * **Applicable Standard** (e.g., ASTM A536, EN 1563). * **Part Drawing & Specification.** * **Certification Requirements:** Mill Test Report (MTR) with chemistry, tensile properties, and hardness. * **Special Requirements:** Any need for impact testing, low-temperature certification (e.g., per ASTM A874), pressure testing, or specific non-destructive testing (NDT). **Tensile Grade 60-40-18 is the benchmark for high-ductility cast iron, offering designers a unique combination of castability, machinability, and mechanical reliability that is often unmatched by other engineering materials at a comparable cost.** -:- For detailed product information, please contact sales. -: Ductile Iron tension grade 60-40-18 Specification Dimensions Size： Diameter 20-1000 mm Length <6531 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 60-40-18 Properties -:- For detailed product information, please contact sales. -:

Applications of Ductile Iron Rod tension grade 60-40-18 -:- For detailed product information, please contact sales. -: Chemical Identifiers Ductile Iron Rod tension grade 60-40-18 -:- For detailed product information, please contact sales. -:

Packing of Ductile Iron Rod tension grade 60-40-18 -:- 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 3002 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