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ASTM A391/A391M-21
Standard Specification for Grade 80 Alloy Steel Chain
Přeložit název
NORMA vydána dne 1.1.2021
Informace o normě:
Označení normy: ASTM A391/A391M-21
Datum vydání normy: 1.1.2021
Kód zboží: NS-1020152
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM A391/A391M-21 :
This specification deals with Grade 80 heat-treated alloy steel chain for applications such as slings, lifting assemblies, and load binding. The alloy steel chain shall be made to a fully-killed fine austenitic grain process. Alloy steel chain may be made by the electric welding or gas welding process. The material shall be heat treated which includes quenching and tempering. Material´s composition shall conform to the chemical requirements for carbon, phosphorous, sulfur, nickel, chromium, and molybdenum. The material shall conform to the mechanical property requirements for breaking force and elongation and to the dimensional requirements for the appropriate size chain. All chain shall be tested to at least the proof load.
Keywords:
alloy steel chain, chain, Grade 80, steel chain,, ICS Number Code 77.140.65 (Steel wire, wir ropes and link chains)
Doplňující informace
| 1. Scope | ||||||
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1.1?This specification covers Grade 80 heat-treated alloy steel chain for such applications as slings, lifting assemblies, and load binding. For overhead lifting applications, only alloy chain should be used. 1.2?The chain grade is based on the nominal stress in the link at the design breaking force strength. It is calculated by taking the minimum breaking force load and dividing by two times the nominal cross-sectional area of the link. 1.3?The values stated in either SI units or in other units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.3.1?Metric UnitsGrade = 1/10?of the minimum breaking force in kilonewtons divided by two times the nominal cross-sectional area in square millimeters. = (MBF)/(0.005)(?)(d)(d) 1.3.2?English UnitsGrade = 0.000689 of the minimum breaking force in pounds divided by two times the nominal cross-sectional area in square inches. = (0.000689)(MBF)/(0.5)(?)(d)(d) 1.3.3?MBF = minimum breaking force (lb or kN); d = chain diameter (in. or mm). Note 1:?The above formulas are for round diameter links only.
If different cross sections are used, the actual cross section of
the link would need to be calculated and used.
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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