This is a comparison table for some gray iron casting grades in these standards. Astm international, formerly known as the american society for testing and materials astm, is a globally recognized leader in the development and delivery of international voluntary consensus standards. Astm a48 a48m032012 we have no amendments or corrections for this standard. Astm a48, sae j431, gm 274m and astm a126 are standards for gray cast iron. Astm a480a480m15 general requirements for flatrolled stainless and heatresisting steel plate, sheet, and strip. When fractured, it is grayish in colour hence the name specifically, a fracture will follow along the graphite flakes which are gray. Comparison table for some gray iron casting grades. Astma48 standard specification for gray iron castings. Cast iron astm a48 class 35 is equal to ht250, fc250, gg25, g25, fgl250, t260, o125, which is a type of high grade gray cast iron. This standard is issued under the fixed designation a 48 a 48m. Astm a48 94ae1, standard specification for gray iron castings, astm international, west conshohocken. Additionally, in the table below standards for evaluating the microstructure of graphite. Casting material gray iron in astm a48 sand casting, investment.
Astm g4 standard guide for conducting corrosion coupon. Standard guide for conducting corrosion coupon tests in field applications 1 this standard is issued under the fixed designation g 4. What is astm a278 pdf standard for gray iron casting for. Dallas water utilities approved materials by trade name wastewater collection system manhole lidcover manufacturer3 model number nctcog standard drawing exception notes standard 24 bass and hays bh40024c10 806. Astm a48 a48m00, standard specification for gray iron castings, astm international, west conshohocken. For annual book of astm standards volume information, refer to the standard s document summary page on the astm website. Astm a48 class 25 is a material grade of gray cast iron in usa, which is higher than class 20, but lower than class 30. Astm a48 gray iron casting metalworking heat treating scribd. All bsi british standards available online in electronic and print formats. Ytype pipeline strainers ytype strainers in a wide variety of sizes and materials to fit most pipeline straining requirements. Ihs markit is your source for astm standards and publications. Astm a48 76 astm a15977 astm a48 76 astm a15977 astm a48 76 astm a15977 astm a48 76 astm a15977 astm a48 76 astm a15977 typical range of mechanical properties tensileksi min. Standard designations usually consist of a letter prefix and a sequentially assigned number. Accelerated atmospheric corrosion in a cast astm a48 gray iron.
Astm d780312 standard practice for preparation of zinc hot dip galvanized coated iron and steel product and hardware surfaces for powder coating. Pdf since 1989, astm committee e 30 on forensic sciences has been formulating voluntary concensus standards for the forensic sciences. Ductile iron what ductile iron is ductile iron is a family of cast graphitic irons which possess high strength, ductility and resistance to shock. A 644 terminology relating to iron castings e 8 test methods for tension testing of metallic.
Astm a278 standard for gray iron casting for pressure parts. They have some grades which have some equal or similar mechanical properties, such as tensile strength and hardness. Astm a48 astm a48 is the most popular gray iron casting specification and classifies castings to various grades by their tensile strength. Printer friendly version pdf download download as pdf excel download download to excel. A number in parentheses indicates the year of last reapproval.
Astm a 48 free pdf download astm international standards. Gray iron, or grey cast iron, is a type of cast iron that has a graphitic microstructure. The followings are its application, physical properties, chemical composition and our opinion. Active standard astm a48 a48m developed by subcommittee. This standard has been approved for use by agencies of the. Astm a48 a48m032012 standard specification for gray iron castings. Astm does not give any warranty express or implied or make any representation that the contents. Documents sold on the ansi webstore are in electronic adobe acrobat pdf format, however some iso and iec standards are available from amazon in hard copy format. Astm a48 a48m 032016 standard specification for gray. Astm a48 a48m 032016 standard specification for gray iron. Combining values from the two systems may result in nonconformance with the standard. Astm a 247 evaluating the microstructure of graphite in iron castings.
When fractured, it is grayish in colour hence the name specifically, a fracture will. Material comparison table astm standard a36 structural steel uns no. There are four specific grades as astm a48 class 25a, 25b, 25c and 25s. Astm a48 a48m standard specification for gray iron castings, grades including class no. Astm a48a48m032016 standard specification for gray. Casting degrees are classified on the basis of the tensile strength of the cast test bars. It is used for housings where the stiffness of the component is more important than its tensile strength. I am not sure if the suggestions here were based on hypothetical or real sea. Astm a48a48m 032016 standard specification for gray. This standard is for gray iron castings used for general engineering use where tensile strength is a major consideration. The following bibliographic material is provided to assist you with your purchasing decision. Astm a48 class 30 related standards din gg20, bs 1452 grade 220 is a gray cast iron. It is informational only and not an official part of the standard. The values stated in each system may not be exact equivalents.
Annealed cast ductile iron can be bent, twisted or deformed without fracturing. This may optionally be followed by a dash and the last two digits of the year in which the standard was adopted. This specification covers gray iron castings intended for general engineering use where tensile strength is. Astm a48 a48m 032012 standard specification for gray.
This group of astm specifications covers standard properties of steel and iron castings and forgings for valves, flanges, fittings, and other pressure containing parts for hightemperature and lowtemperature service. It is the most common cast iron and the most widely used cast material based on weight. Astm a48 standard for gray iron castings dandong foundry. The values given in parentheses are for information only. In this issue, we focus on the work of the astm american society for testing and materials, one of the largest voluntary standards development organisations in the world. Its strength, toughness and ductility duplicate many grades of steel and far exceed those of standard gray irons. Gray iron astm a48 class 30 data sheet penticton foundry. Astm a48, cl 30b 2 headshaft water lube stainless astm a582, type 416.
Gray iron consists of graphite flakes in a metallic matrix. There are four specific grades as astm a48 class 25a, 25b, 25c and 25s mechanical properties of a48 class 25 cast iron. For assistance, please contact astm compass support, and include the full url of this page in your correspondence. Corrosion atmosferica acelerada en una fundicion gris astm a48. Purchase your copy of astm a48 a48m 032016 as a pdf download or hard copy directly from the official bsi shop. Connection size body screen retainer gasket bolting standard screen 2 astm a48 class 30 cast iron astm a48 class 30.
Vertical turbine pumps bulletin cp275 vtp series christensen pumps. Gray iron has a low tensile strength due to the flake graphite in its microstructure, so it is used for shell components where the. Today, some 12,000 astm standards are used around the world to improve product quality, enhance safety. Astm class 30 standard gray iron test bars, as cast sae j431 automotive. Astm a48 94ae1 standard specification for gray iron castings. Astm a48 a48m 00 standard specification for gray iron.
Give us a minute while we verify your ip address and youll be on your way to your tailored subscription. Astm international helping our world work better standards catalog 2016. In order to standardize solidification and cooling rate, standard test specimen sizes are used to ensure conformance to the specification. Astm a48a48m032016 standard specification for gray iron castings. Astm in the first of an occasional series, we look at standards currently under development around the world in the field of sealing technology. E8 test methods for tension testing of metallic materials. A48 a48m032016 standard specification for gray iron castings gray iron castings. Astm does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Gray iron consists of graphite flakes in a metallic. Cast iron astm a48 class 40c ductile iron astm a536 grade 654512 316 stainless steel, astm a743, type cf8m.
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