ASTM class 50 Standard gray Iron Sheet,Plates, as cast

ASTM class 50 Standard gray Iron Sheet/Plate test bars, as cast Product Information -:- For detailed product information, please contact sales. -: ASTM class 50 Standard gray Iron Sheet/Plate test bars, as cast Synonyms -:- For detailed product information, please contact sales. -:

ASTM class 50 Standard gray iron test bars, as cast Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM Class 50 Standard Gray Iron Test Bars, As-Cast** **Product Overview** ASTM Class 50 Standard Gray Iron Test Bars are precision-cast reference specimens specifically designed for the consistent and reliable evaluation of the chemical, mechanical, and microstructural properties of gray iron. The "As-Cast" condition indicates that the bars have undergone no post-casting heat treatment, representing the material's properties directly from the foundry process. The designation "Class 50" refers to a minimum tensile strength of 50 ksi (approximately 345 MPa). These test bars serve as a critical quality control tool for foundries, material testing laboratories, and research institutions to ensure compliance with specifications and to benchmark material performance. **Key International Standards** The production and testing of these bars are governed by stringent international standards, ensuring global consistency and recognition: * **ASTM A48/A48M:** *Standard Specification for Gray Iron Castings* - This is the primary specification defining the grades (classes) of gray iron based on tensile strength measured from separately cast test bars. * **ASTM A438:** *Standard Test Method for Transverse Testing of Gray Iron Castings* - Often used in conjunction with or as an alternative to tensile testing for evaluating strength. * **ISO 185:** *Grey cast irons — Classification* - The international equivalent, where a tensile strength of 345 MPa corresponds to Grade GC 350. **Typical Chemical Composition** The chemistry is balanced to achieve the required Class 50 strength while maintaining good castability and characteristic gray iron microstructure (graphite flakes in a ferritic/pearlitic matrix). | Element | Composition Range (%) | Role & Influence | | :--- | :--- | :--- | | **Carbon (C)** | 3.00 - 3.60 | Primary graphitizing element; ensures graphite formation and castability. | | **Silicon (Si)** | 1.80 - 2.40 | Strong graphitizer; promotes ferrite, controls pearlite content, and influences hardness. | | **Manganese (Mn)** | 0.60 - 1.00 | Stabilizes pearlite and combines with sulfur to form MnS inclusions. | | **Phosphorus (P)** | 0.15 max | Improves fluidity but forms hard, brittle phosphide eutectic at higher levels. | | **Sulfur (S)** | 0.15 max | Tends to inhibit graphitization; controlled to prevent chill and poor machining. | | **Chromium (Cr)**| 0.10 - 0.40 | Pearlite stabilizer and carbide promoter; used to increase strength and hardness. | *(Note: Exact composition may vary slightly between manufacturers to achieve the target properties.)* **Physical & Mechanical Properties (Typical As-Cast)** Properties are measured on standard test bars (e.g., ASTM A48 sand-cast bar with a diameter of 1.2 inches / 30 mm). | Property | Typical Value | Test Standard | | :--- | :--- | :--- | | **Tensile Strength, min.** | 50 ksi (345 MPa) | ASTM A48, ASTM E8 | | **Hardness (Brinell)** | 187 - 241 HBW | ASTM E10 | | **Modulus of Elasticity** | 14 - 22 x 10^6 psi (97 - 152 GPa) | — | | **Density** | 0.26 lb/in³ (7.2 g/cm³) | — | | **Microstructure** | Type A Graphite Flakes in a Matrix of Pearlite and Ferrite | ASTM A247 | | **Compressive Strength** | ~3-4 x Tensile Strength | — | | **Damping Capacity** | Excellent | — | **Product Applications & Purpose** These test bars are not functional components but are essential **quality assurance and R&D tools**. Their primary applications include: * **Foundry Process Control:** To verify that the melting, inoculation, and pouring practices consistently produce iron meeting the Class 50 specification. * **Material Certification:** Supplied with production castings to provide documented proof of material grade compliance to customers. * **Laboratory Testing:** Used by third-party labs for material verification, comparative studies, and failure analysis. * **Research & Development:** For developing new alloy compositions, studying the effects of process variables, and calibrating testing equipment. * **Machinability Studies:** Serving as standard material samples for testing tool wear, cutting speeds, and surface finish. **Ordering Information** When ordering, specify: **"ASTM Class 50 Gray Iron Test Bars, As-Cast"** along with the required dimensions (typically per ASTM A48, e.g., 1.2" diameter), quantity, and any needed certification (e.g., foundry test report with chemical analysis and tensile results). --- This product is indispensable for any stakeholder requiring verifiable, standardized data on the fundamental properties of Grade 50 gray iron, bridging the gap between foundry practice and engineered component performance. -:- For detailed product information, please contact sales. -: ASTM class 50 Standard gray iron test bars, as cast Specification Dimensions Size： Diameter 20-1000 mm Length <6513 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 50 Standard gray iron test bars, as cast Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM class 50 Standard gray Iron Sheet,Plate test bars, as cast -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM class 50 Standard gray Iron Sheet,Plate test bars, as cast -:- For detailed product information, please contact sales. -:

Packing of ASTM class 50 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 2984 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