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Norma ASTM B974/B974M-16(2021) 1.1.2021 náhľad

Doplňujúce informácie

ASTM B974/B974M-16(2021)

Standard Specification for Free-Cutting Bismuth Brass Rod, Bar and Wire

NORMA vydaná dňa 1.1.2021

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Informácie o norme:

Označenie normy: ASTM B974/B974M-16(2021)
Dátum vydania normy: 1.1.2021
Kód tovaru: NS-1012992
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM

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Anotácia textu normy ASTM B974/B974M-16(2021) :

This specification establishes the requirements for free-cutting a bismuth brass rod, bar and wire of UNS Alloy No.C49250 and C49260 suitable for high-speed screw machine work or for general applications. Typically, products made to this specification are furnished as straight lengths or coils when requested. The material shall conform to the chemical composition requirements, tensile strength requirements, and elongation requirements stated in this specification.

Keywords:
bismuth brass rod and bar, bismuth containing rod and bar, free-cutting brass rod and bar, free-cutting copper rod and bar, lead free brass rod and bar, screw machine stock, UNS Alloy No. C49250, UNS Alloy No. C49260, UNS Alloy No. C49265, UNS Alloy No. C49340, UNS Alloy No. C49345,, ICS Number Code 77.120.99 (Other non-ferrous metals and their alloys)

Doplňujúce informácie

1. Scope

1.1?This specification establishes the requirements for free-cutting bismuth brass rod, bar and wire of UNS Alloy No. C49250, C49260, C49265, C49340, and C49345 suitable for high-speed screw machine work, or for general applications.

1.2?Typically, product made to this specification is furnished as straight lengths, or coils when requested.

1.3?UnitsThe values stated in either SI units or inch-pound 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.

1.4?This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5?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.

2. Referenced Documents

E8/E8M-24	Standard Test Methods for Tension Testing of Metallic Materials
B846-19a	Standard Terminology for Copper and Copper Alloys (Includes all amendments and changes 8/8/2019).
B250/B250M-19	Standard Specification for General Requirements for Wrought Copper Alloy Wire
B249/B249M-23	Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
	Copper and copper alloys determination of bismuth content Diethyldithiocarbamate spectrometric method Available from International Organization for Standardization (ISO), ISO Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva, Switzerland, http://www.iso.org.
E527-23	Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E478-08(2017)	Standard Test Methods for Chemical Analysis of Copper Alloys
E92-23	Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials
E62-89(1996)	Standard Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)
E54-80(1996)	Standard Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)
JIS H 1068:2005	Method for Determination of Bismuth in Copper and Copper Alloys Available from Japanese Standards Association (JSA), Mita MT Bldg., 3-13-12 Mita, Minato-ku, Tokyo 108-0073, Japan, http://www.jsa.or.jp.
E53-07	Standard Test Method for Determination of Copper in Unalloyed Copper by Gravimetry

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