ASTM class 60 Standard gray Iron Sheet,Plates, as cast

ASTM class 60 Standard gray Iron Sheet/Plate test bars, as cast Product Information -:- For detailed product information, please contact sales. -: ASTM class 60 Standard gray Iron Sheet/Plate test bars, as cast Synonyms -:- For detailed product information, please contact sales. -:

ASTM class 60 Standard gray iron test bars, as cast Product Information -:- For detailed product information, please contact sales. -: **Product Technical Data Sheet: ASTM Class 60 Standard Gray Iron Test Bars, As-Cast** **1. Product Overview** ASTM Class 60 Standard Gray Iron Test Bars, in the "As-Cast" condition, are standardized reference castings specifically designed to represent and verify the mechanical properties of higher-strength gray iron. The "60" designation indicates a minimum tensile strength of 60,000 psi (approximately 414 MPa). These bars are produced under controlled conditions separate from production castings to provide an unbiased assessment of the molten metal's inherent quality and the foundry process's capability. They are the primary tool for certifying that a melt conforms to the specified ASTM grade, making them critical for quality assurance, material certification, and process validation in the foundry and manufacturing industries. **2. Governing International Standards** The manufacture, testing, and acceptance of these test bars are defined by globally recognized standards: * **Primary Standard: ASTM A48/A48M** - *Standard Specification for Gray Iron Castings*. This is the definitive document that establishes Class 60 requirements, including tensile strength measured on separately cast test bars. * **Testing Standard: ASTM E8/E8M** - *Standard Test Methods for Tension Testing of Metallic Materials*. Governs the procedure for determining tensile strength and yield strength (if applicable). * **Hardness Testing: ASTM E10** - *Standard Test Method for Brinell Hardness of Metallic Materials*. * **Microstructure Evaluation: ASTM A247** - *Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings*. * **International Equivalent: ISO 185** - *Grey cast irons — Classification*. Class 60 (414 MPa) is broadly equivalent to Grade **GC 400** in the ISO system, though precise equivalency should be verified based on bar diameter and specific requirements. **3. Typical Chemical Composition** To achieve the higher strength of Class 60, the chemical composition is carefully controlled with a focus on promoting a pearlitic matrix and refining the graphite structure. | Element | Target Range (%) | Functional Role | | :--- | :--- | :--- | | **Carbon (C)** | 3.00 - 3.30 | Provides the basis for graphite formation; lower carbon than softer grades to increase matrix strength. | | **Silicon (Si)** | 1.80 - 2.30 | Graphitizing agent; balanced to ensure full graphitization while promoting pearlite. | | **Manganese (Mn)** | 0.60 - 1.00 | Essential pearlite stabilizer; neutralizes sulfur by forming MnS inclusions. | | **Phosphorus (P)** | ≤ 0.12 | Kept low to minimize the formation of brittle phosphide networks, which can impair toughness. | | **Sulfur (S)** | ≤ 0.12 | Controlled to prevent chill (carbide formation) and optimize inoculation response. | | **Chromium (Cr)** | 0.20 - 0.50 | Key alloying element for Class 60. Strongly promotes pearlite and fine carbides, significantly increasing strength and hardness while reducing section sensitivity. | *Note: Copper (Cu) up to 0.80% or Tin (Sn) up to 0.10% may also be added as supplemental pearlite stabilizers to ensure a consistent, fully pearlitic matrix in heavy sections.* **4. Physical & Mechanical Properties (Typical As-Cast)** Properties are measured on standard separately cast test bars (e.g., 1.2" / 30.5 mm diameter as per ASTM A48). | Property | Specification / Typical Value | Test Standard | | :--- | :--- | :--- | | **Minimum Tensile Strength** | **60 ksi (414 MPa)** | ASTM A48, ASTM E8 | | **Typical Tensile Strength Range** | 60 - 70 ksi (414 - 483 MPa) | | | **Hardness (Brinell, HBW)** | 207 - 255 HBW | ASTM E10 | | **Modulus of Elasticity** | 17 - 23 x 10^6 psi (117 - 159 GPa) | Derived from test | | **Density** | 0.26 lb/in³ (7.2 g/cm³) | | | **Microstructure** | Type A (preferred) or B Graphite Flakes in a **Predominantly Pearlitic Matrix**. Minor ferrite may be present. | ASTM A247 | | **Compressive Strength** | ~ 3 to 4 times the tensile strength | | | **Damping Capacity** | Very Good (superior to steel, but lower than softer gray iron grades) | | | **Machinability** | Fair to Good (requires harder tooling than lower-class gray iron) | | **5. Product Applications & Purpose** These test bars are **quality control and certification artifacts**, not functional components. Their value lies in their standardized use: * **Material Grade Certification:** The primary use is to provide physical proof that a specific melt or lot of iron meets the ASTM A48 Class 60 specification for tensile strength. A certified test report accompanies shipments of production castings. * **Foundry Process Monitoring:** Used internally by foundries to monitor and adjust key process variables such as charge makeup, melting practice, inoculation efficiency, and cooling rates to consistently hit the Class 60 target. * **Incoming Material Verification:** Purchasers of gray iron castings may test or witness the testing of these bars to validate the material properties of supplied components. * **Research & Development:** Used in laboratories to study the effects of new alloy additions, inoculants, or casting parameters on the properties of high-strength gray iron. * **Tooling & Machining Trials:** Serve as standardized material samples for developing machining parameters, testing tool life, and optimizing feeds/speeds for pearlitic gray iron components. **6. Ordering Information** Specify: **"ASTM A48 Class 60 Gray Iron Test Bars, As-Cast"**. Key details to provide: * Bar diameter/specimen configuration (e.g., 1.2" diameter standard test bar). * Quantity of bars. * Required documentation (e.g., Foundry Test Report including full chemical analysis, tensile test results, and hardness data). * Any additional testing (e.g., microstructure photos per ASTM A247). -:- For detailed product information, please contact sales. -: ASTM class 60 Standard gray iron test bars, as cast Specification Dimensions Size： Diameter 20-1000 mm Length <6514 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. -: ASTM class 60 Standard gray iron test bars, as cast Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM class 60 Standard gray Iron Sheet,Plate test bars, as cast -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM class 60 Standard gray Iron Sheet,Plate test bars, as cast -:- For detailed product information, please contact sales. -:

Packing of ASTM class 60 Standard gray Iron Sheet/Plate test bars, as cast -:- 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 2985 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