Iron Tube,Pipe grade 60-40-18,Iron Tube,Pipe grade 60-40-18

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

Ductile Iron grade 60-40-18 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron (Nodular Iron) Grade 60-40-18** #### **1. Product Overview** Ductile Iron (DI), also known as Nodular or Spheroidal Graphite Iron (SGI), is an advanced cast ferrous material characterized by its graphite nodules, which provide a unique combination of high strength and significant ductility. **Grade 60-40-18** is one of the most common and versatile grades, defined by its minimum mechanical properties: a **60 ksi (415 MPa) tensile strength, 40 ksi (275 MPa) yield strength, and 18% elongation**. This grade is typically produced with a **ferritic matrix** through an annealing heat treatment, offering the best overall balance of strength, toughness, and machinability among standard ductile iron grades. It is a premier engineering material for components requiring reliability under dynamic loads and good impact resistance. #### **2. Governing International Standards** The classification and testing of this grade are defined by globally harmonized standards. * **Primary Designation: ASTM A536** - *Standard Specification for Ductile Iron Castings*. The grade is designated as **60-40-18**. * **Alternative Designations:** * **ISO 1083:** Designated as **EN-GJS-400-18** or **JS/1050-06** (400 MPa tensile, 250 MPa yield, 18% elongation). Slight variations exist, but 60-40-18 is the direct commercial equivalent. * **EN 1563:** (European Standard) **EN-GJS-400-18**. * **SAE J434:** (Automotive) **D4512**. * **Key Testing Standards:** * **Tensile Test:** ASTM E8 / ISO 6892-1. * **Impact Test:** ASTM E23 (Charpy) / ISO 148-1. * **Microstructure:** ASTM A247 / ISO 945 (Graphite nodularity >80-90% typical, Type I & II). #### **3. Typical Chemical Composition (Ferritic Annealed Grade)** The chemistry is controlled to achieve high nodularity and a primarily ferritic matrix post-annealing. | Element | Target Range (%) | Functional Role | | :--- | :--- | :--- | | **Carbon (C)** | 3.5 - 3.9 | Ensures castability and graphite formation; high carbon equivalent promotes graphitization. | | **Silicon (Si)** | 2.3 - 2.8 | Strong ferritizer. Higher Si promotes the ferritic matrix but must be controlled to avoid embrittlement at low temperatures. | | **Manganese (Mn)** | ≤ 0.30 | Kept low to prevent pearlite stabilization and segregation at cell boundaries, which would reduce ductility and impact resistance. | | **Magnesium (Mg)** | 0.03 - 0.05 | Essential nodulizing element. Residual level ensures graphite spheroidization. | | **Copper (Cu)** | ≤ 0.10 | Minimized in ferritic grades to avoid pearlite formation. | | **Phosphorus (P)** | ≤ 0.04 | Kept very low to prevent brittle phosphide networks at grain boundaries. | | **Sulfur (S)** | ≤ 0.015 | Very low to prevent interference with magnesium nodulization. | | **Cerium/Rare Earths** | Often present | Aids nodulization, counters detrimental trace elements. | #### **4. Physical & Mechanical Properties** This grade is defined by its excellent combination of strength and ductility. | Property | Minimum / Typical Value | Test Standard & Notes | | :--- | :--- | :--- | | **Tensile Strength, min.** | **60 ksi (415 MPa)** | ASTM A536 / ISO 1083 | | **Yield Strength (0.2% offset), min.** | **40 ksi (275 MPa)** | High yield-to-tensile ratio (~0.65). | | **Elongation, min.** | **18%** (in 2 inches or 50mm) | **Key distinguishing feature:** High ductility. | | **Hardness (Brinell)** | 143 - 187 HBW | Typically ~160 HBW. Excellent machinability. | | **Modulus of Elasticity** | 24 - 25 x 10⁶ psi (165 - 172 GPa) | Higher than gray iron, similar to steel. | | **Charpy Impact (V-Notch) @ 23°C** | 12 - 18 J (Typical) | ASTM E23. Good impact resistance. | | **Fatigue Endurance Limit** | ~210 - 240 MPa (≈ 0.5 x UTS) | Good fatigue performance for dynamic parts. | | **Density** | 0.256 lb/in³ (7.1 g/cm³) | ~10% lighter than steel. | | **Microstructure** | **>90% Ferrite** matrix with **>80% Nodularity** (Type I & II graphite). Small amounts of pearlite may be present. | ASTM A247. The ferritic matrix is responsible for the high elongation and toughness. | #### **5. Product Applications** Grade 60-40-18 is specified for safety-critical components that experience shock loads, cyclic stresses, or require pressure integrity. * **Automotive & Transport:** **Differential carriers, axle housings, steering knuckles, brake calipers, commercial vehicle hubs.** Its toughness withstands road shocks. * **Pipe & Fittings:** **Ductile Iron Pipe (DIP) for water/sewer mains** (often per AWWA C151). High ductility is vital for withstanding ground movement and pressure surges. * **Agriculture & Off-Highway:** **Tractor front axle supports, gearbox housings, plough brackets, harvester components.** * **General Engineering:** **Hydraulic valve bodies, pump housings, press frames, heavy machinery brackets.** Where weldability (to a degree) and machinability are needed. * **Wind Energy:** **Hub castings** for smaller turbines, where its balance of properties is advantageous. #### **6. Fabrication & Heat Treatment Notes** * **Primary Condition:** **Annealed.** Castings are heated to 900-925°C, held to dissolve carbides, and slowly cooled through the eutectoid temperature to transform the matrix to ferrite. * **Machinability:** **Excellent** due to the soft ferritic matrix and graphite nodules that act as chip breakers. * **Weldability:** **Fair, but requires extreme care.** Pre-heat (350-650°C) and post-heat stress relief are mandatory. Use nickel- or special ductile iron electrodes. Not recommended for primary joining but acceptable for repairs. #### **7. Ordering Information** Specify: **"Ductile Iron Castings, ASTM A536 Grade 60-40-18 (Ferritic Annealed)"**. Key details to include: * **Drawing/Part Specification.** * **Required certifications:** Foundry test report with mechanical properties (tensile, yield, elongation, hardness) and often micrograph showing nodularity/ferrite content. * **Any special requirements:** Impact testing at low temperatures, pressure testing, specific radiographic inspection standards. This grade remains a cornerstone material for designers seeking a reliable, castable alternative to forged or fabricated steel components, offering significant cost and weight savings without sacrificing performance in demanding applications. -:- For detailed product information, please contact sales. -: Ductile Iron grade 60-40-18 Specification Dimensions Size： Diameter 20-1000 mm Length <6517 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 60-40-18 Properties -:- For detailed product information, please contact sales. -:

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

Packing of Ductile Iron Tube 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 Tube 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 2988 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