ADI; ASTM AM, ASTM (in-lb units) ASTM M (SI units) Austempered Ductile Iron (ADI) offers low cost, design flexibility. ASTM A is an alloyed nodular iron which is heat treated to achieve the desired properties. Austempered ductile iron (ADI) is a. This standard is issued under the fixed designation A/AM; the number 1 This specification is under the jurisdiction of ASTM Committee A04 on Iron.
|Published (Last):||4 November 2015|
|PDF File Size:||12.69 Mb|
|ePub File Size:||12.92 Mb|
|Price:||Free* [*Free Regsitration Required]|
In section sizes over 1?
ASTM A / AM – 16 Standard Specification for Austempered Ductile Iron Castings
Lower temperature quench would give it a higher strength with abrasion resistance. Link to Active This link will always route to the current Active version of the standard.
The test coupons shall be cast in open molds made of suitable core sand having a minimum wall thickness of 11? The amount of residual Mg plus the amounts of these elements should not exceed 0. There is no optimum recipe; however those produced to the following parameters have been shown to yield excellent results.
In density, ADI is. For over 60 years, Carson Castings continues to meet your raw and machined sand and investment casting needs with ISO certified facilities.
The form of this agreement depends upon which of the conditions in Molybdenum Molybdenum is the most potent hardenability agent in ADI and may be necessary in heavy section castings to prevent the formation of pearlite.
The values in the table are a minimum for the average of the highest three test values of the four tested samples. In case no option is expressed, the manufacturer shall make the a89.
However, this composition is a typical, industrially successful ADI composition. ADI heat treated materials exhibit mechanical properties equivalent to cast and a97 steels. Your comments are invited either for revision of this standard or for additional standards and should be addressed axtm ASTM International Headquarters. Preparation for Delivery Manganese Manganese additions above that of the base metal composition are not recommended because Mn segregates to the last to freeze regions of the casting and will retard the formation of ausferrite if the nodule count is not sufficiently high to break up the Mn segregated region.
The iron asmt conform to the mechanical property requirements including tensile strength, yield strength, elongation, impact energy, and Brinell hardness. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
ASTM A ADI Grade / (Grade 2)
We can provide raw castings or complete assemblies and everything in between painting, atsm treat and machining. Lot size can be de? Commonly used in fabrication-to-casting conversion projects, ADI grade 2 offers mechanical performance that is often comparable to steels, without the added cost.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Highly specialized in austempered ductile iron.
This does not prevent an agreement wherein any one manufacturer in the chain of sequential sstm can agree to assume full responsibility for all quality and inspection requirements. Responsibility for meeting the speci? The heavier the effective section size and the more massive the casting, the slower will be the cooling or quenching rate in the austempering cycle.
Pouring molten grey iron metal from holding furnace into pouring ladle at a grey iron casting company. The microstructure is uniformly formed with aus-ferrite and graphite nodules. Our tooling options include no bake and green sand molding. Dimensions shall conform to drawings or patterns supplied by the purchaser. Warning— Achieving the required mechanical properties and austempered microstructure in the smaller cross sections of a premachined test bar does not ensure the correct response in the heavier sections of actual parts, as explained in X1.
Castings shall be heat treated by an austempering process detailed in this specification. It should be controlled as follows wstm Table X1. During this quench an aus-ferrite microstructure is formed. This quenching rate must exceed some critical value to attain the correct microstructure ausferrite or ausferrite and proeutectoid ferrite. Login to see your most recently viewed materials here.
Impact Test Specimens The proper alloy composition should be determined jointly by the foundry a8897 the heat treating source. Subscribe to Premium Services Searches: Appendix X2 provides guidelines for selection of coupons with mold cooling rates representative of various casting sections.