Dura-Bar,60-40-18 Continuously Cast Ductile Iron Wire ASTM A536, 4018

Dura-Bar 60-40-18 Continuously Cast Ductile Iron Wire Bar Stock ASTM A536, 4018 Product Information -:- For detailed product information, please contact sales. -: Dura-Bar 60-40-18 Continuously Cast Ductile Iron Wire Bar Stock ASTM A536, 4018 Synonyms -:- For detailed product information, please contact sales. -:

Dura-Bar 60-40-18 Continuously Cast Ductile Iron Bar Stock ASTM A536, 4018 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: Dura-Bar 60-40-18 Continuously Cast Ductile Iron Bar Stock** **Dura-Bar 60-40-18** is a brand-name, high-quality **continuously cast ductile iron bar stock** produced by Dura-Bar. It conforms to the **ASTM A536 60-40-18** grade (also commonly referenced as **SAE J434 D4018**), representing a premium, readily available form of **ferritic ductile iron**. Unlike traditional sand-cast components, Dura-Bar is manufactured through a proprietary continuous casting process, resulting in a dense, homogeneous, and porosity-free microstructure with superior consistency throughout the entire bar length and cross-section. This “60-40-18” designation indicates minimum mechanical properties: **60 ksi Tensile Strength, 40 ksi Yield Strength, and 18% Elongation**. It is renowned for its exceptional machinability, high strength-to-weight ratio, and excellent vibration damping characteristics. --- ### **1. Key International Standards & Designations** * **Primary Material Standard:** **ASTM A536 - Standard Specification for Ductile Iron Castings** (Grade 60-40-18). * **Automotive Standard:** **SAE J434 - D4018** (Direct equivalent). * **International (ISO) Standard:** **EN-GJS-400-18** or **JS/400-18** per **ISO 1083**. * **UNS Designation:** **F32800** (typical for ferritic ductile iron grades). * **Manufacturer & Product Name:** **Dura-Bar Continuous Cast Iron, Grade 60-40-18**. * **Common Names:** Continuous Cast Ductile Iron, 60-40-18 Bar Stock, Machinery Grade Ductile Iron. --- ### **2. Chemical Composition (Typical Ranges for Dura-Bar 60-40-18)** The composition is tightly controlled to ensure a **fully ferritic matrix** with **spheroidal graphite**, providing optimal machinability and ductility. The continuous casting process allows for exceptional consistency. | Element | Typical Range (% by Weight) | Purpose & Rationale | | :--- | :--- | :--- | | **Carbon (C)** | 3.4 - 3.7 | Ensures adequate graphitization. The continuous casting process yields a finer, more uniform graphite nodule distribution than sand casting. | | **Silicon (Si)** | 2.3 - 2.7 | Primary ferritizing agent. Promotes a fully ferritic matrix, essential for high ductility and toughness. | | **Manganese (Mn)** | 0.35 - 0.45 | Slightly higher than some sand-cast equivalents for added strength, but still controlled to maintain a predominantly ferritic structure. | | **Phosphorus (P)** | ≤ 0.035 | Kept very low to prevent the formation of brittle iron phosphides. | | **Sulfur (S)** | ≤ 0.015 | Extremely low. Critical for successful nodularization and a clean, sound microstructure in continuous casting. | | **Magnesium (Mg)** | 0.04 - 0.06 (Residual) | **The essential nodulizing element.** Ensures graphite forms as perfect spheres (Type I graphite). | | **Copper (Cu)** | ≤ 0.20 (Optional/Trace) | Minimal, as it is a pearlite promoter. May be present in trace amounts. | | **Tin (Sn)** | ≤ 0.02 (Optional/Trace) | Minimal pearlite stabilizer. | **Microstructural Key:** The hallmark is a microstructure of >90% **ferrite** with small, well-dispersed, **spheroidal graphite nodules (ASTM Type I, Size 4-6)**. This is guaranteed by the controlled cooling of the continuous casting process. --- ### **3. Mechanical & Physical Properties** The continuous casting process provides superior and more consistent properties compared to sand-cast equivalents of the same grade. **A. Mechanical Properties (Minimums & Typical Achieved):** * **Tensile Strength:** **60 ksi min (414 MPa min)** – Typically 65-75 ksi (450-520 MPa). * **Yield Strength (0.2% Offset):** **40 ksi min (276 MPa min)** – Typically 45-55 ksi (310-380 MPa). * **Elongation (% in 2" / 50mm):** **18% min** – Typically 20-25%. * **Hardness:** **156 - 217 HB** (Approx. 83 - 95 HRB). The consistent hardness across the bar diameter is a key advantage. * **Modulus of Elasticity:** **24.5 x 10⁶ psi (169 GPa)** – Slightly higher than gray iron, providing good stiffness. * **Fatigue Strength:** Excellent, with an endurance limit typically around 26-28 ksi (180-195 MPa). **B. Typical Physical Properties:** * **Density:** 0.260 lb/in³ (7.19 g/cm³). * **Thermal Conductivity:** 21.6 Btu/(ft·hr·°F) @ 212°F (37.4 W/m·K) – Excellent for dissipating heat in components like hydraulic manifolds. * **Coefficient of Thermal Expansion:** 6.5 x 10⁻⁶ /°F (11.7 x 10⁻⁶ /°C) from 68-212°F – Similar to low-carbon steel. * **Damping Capacity:** **5-10 times greater than steel.** This is a critical property for reducing noise, vibration, and harshness (NVH) in machinery. --- ### **4. Key Characteristics & Advantages (vs. Steel & Castings)** * **Exceptional Machinability:** Arguably its greatest advantage. It machines **2-3 times faster than steel** at the same hardness, with lower power consumption, superior chip breakage, and extended tool life. * **Superior Damping Capacity:** Absorbs vibrational energy far more effectively than steel (1010/12L14), leading to quieter operation, improved part finish, and longer tool life in dynamic applications. * **Consistency & Soundness:** The continuous casting process eliminates internal defects like shrinkage porosity and sand inclusions common in sand castings, ensuring 100% usability and reliability. * **Good Bearing & Wear Properties:** The graphite acts as a built-in lubricant, providing good galling resistance and dry-running capability. * **Lower Cost per Part:** Despite a higher raw material cost per pound than steel, the dramatic savings in machining time and tooling often result in a significantly lower total finished-part cost. * **Availability:** Readily available from stock in a wide range of round, rectangular, and square bar sizes, as well as custom shapes like tubes. --- ### **5. Typical Applications** Dura-Bar 60-40-18 is the material of choice for parts machined from bar stock where performance, cost, and manufacturability are critical. * **Hydraulic & Pneumatic Components:** * **Valve Bodies, Manifolds, and Pump Housings** (excellent pressure tightness and machinability for complex internal passages). * **Cylinder Barrels and End Caps.** * **Automotive & Off-Highway:** * **Wheel Hubs, Brake Caliper Brackets.** * **Transmission Gears and Carriers** (for non-highly loaded applications). * **Engine Components** (rocker arms, bearing caps). * **Industrial Machinery:** * **Rollers, Guides, and Gears** for conveying and automation systems. * **Machine Tool Components:** Slides, gibs, fixtures (benefiting from damping). * **Compressor Parts and Crankshafts.** * **Agricultural Equipment:** * **Spindles, Housings, and Linkages.** --- ### **6. Machinability & Fabrication** * **Machinability Rating:** **80% (compared to 1212 Steel as 100%).** This means it requires only 80% of the power to machine. In practice, feeds and speeds can be significantly increased. * **Welding:** Possible but not generally recommended for primary joining due to the risk of altering the microstructure (forming hard, brittle carbides in the heat-affected zone). Special procedures and post-weld heat treatment are required. * **Surface Treatments:** Can be phosphated, black-oxided, or painted. Hard chrome plating is also possible. ### **Summary** **Dura-Bar 60-40-18 (ASTM A536 / SAE D4018) continuously cast ductile iron bar stock** is a premier **engineering material optimized for machining**. It delivers the **high strength and ductility of a ferritic ductile iron** with the **unmatched consistency, soundness, and superior physical properties** afforded by the continuous casting process. For manufacturers, it translates into **faster production, lower costs, and higher-performance components**, making it an ideal replacement for steel bar stock or sand castings in a vast array of precision-machined parts across virtually every industry. -:- For detailed product information, please contact sales. -: Dura-Bar 60-40-18 Continuously Cast Ductile Iron Bar Stock ASTM A536, 4018 Specification Dimensions Size： Diameter 20-1000 mm Length <6602 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. -: Dura-Bar 60-40-18 Continuously Cast Ductile Iron Bar Stock ASTM A536, 4018 Properties -:- For detailed product information, please contact sales. -:

Applications of Dura-Bar 60-40-18 Continuously Cast Ductile Iron Wire Bar Stock ASTM A536, 4018 -:- For detailed product information, please contact sales. -: Chemical Identifiers Dura-Bar 60-40-18 Continuously Cast Ductile Iron Wire Bar Stock ASTM A536, 4018 -:- For detailed product information, please contact sales. -:

Packing of Dura-Bar 60-40-18 Continuously Cast Ductile Iron Wire Bar Stock ASTM A536, 4018 -:- 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 Wire 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 3073 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