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ASTM A439/A439M-18(2022)
Standard Specification for Austenitic Ductile Iron Castings
Přeložit název
NORMA vydána dne 1.10.2022
Informace o normě:
Označení normy: ASTM A439/A439M-18(2022)
Datum vydání normy: 1.10.2022
Kód zboží: NS-1086568
Počet stran: 7
Přibližná hmotnost: 21 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM A439/A439M-18(2022) :
This specification covers austenitic ductile iron castings used for their resistance to heat, corrosion and wear. The castings shall be melt processed using cupolas, air furnaces, electric furnaces or crucible furnaces. The iron castings shall undergo magnetic permeability test. Samples taken from test coupons, broken test specimens, or castings shall conform to the required chemical compositions of carbon, silicon, manganese, phosphorus, nickel and chromium. Mechanical tests shall be performed wherein the iron casting specimens shall conform to the required values of tensile strength, yield strength, elongation and Brinell hardness.
Keywords:
austenitic, corrosion resistant, ductile iron, mechanical properties, nodular iron, tensile strength, yield strength,, ICS Number Code 77.140.80 (Iron and steel castings)
Doplňující informace
| 1. Scope | ||||||||||||||
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1.1?This specification covers austenitic ductile iron castings, which are used primarily for their resistance to heat, corrosion, and wear, and for other special purposes. 1.2?Austenitic ductile iron, also known as austenitic nodular iron or austenitic spheroidal iron, is characterized by having its graphite substantially in a spheroidal form and substantially free of flake graphite. It contains some carbides and sufficient alloy content to produce an austenitic structure. 1.3?The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.4?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||||||||
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