ASTM B870-21

Standard Specification for Copper-Beryllium Alloy Forgings and Extrusions (UNS Nos. C17500, C17510, and C17540)

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STANDARD published on 1.10.2021

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The information about the standard:

Designation standards: ASTM B870-21
Publication date standards: 1.10.2021
SKU: NS-1041735
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: American technical standard
Category: Technical standards ASTM

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The category - similar standards:

Copper and copper alloys

Annotation of standard text ASTM B870-21 :

This specification establishes the requirements for copper-beryllium alloy forgings and extrusions. The following alloys are specified: UNS No. C17500 and C17510. The material of manufacture should be a cast billet conforming to the chemical composition requirements for the alloy specified. The product shall be manufactured by hot working or extrusion, solution heat-treating, precipitation hardening, and straightening. The material shall conform to the chemical composition for the alloy specified. The material shall conform to the electrical conductivity requirements specified. Hardness test and tensile test shall be made to conform to the requirements specified.

Keywords:

copper beryllium extrusions, copper beryllium forgings, UNS Alloy C17500, UNS Alloy C17510, UNS Alloy C17540,, ICS Number Code 77.120.30 (Copper and copper alloys)

Additional information

1. Scope

1.1?This specification establishes the requirements for copper-beryllium alloy forgings and extrusions. The following alloys are specified:

Copper Alloy
UNS No.

Nominal Composition, %

Beryllium

Cobalt

Nickel

C17500

0.50

2.6

...

C17510

0.40

...

1.8

C17540

0.50

1.5

1.2?UnitsThe values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3?The following safety hazard caveat pertains to Sections 10 and 11 of this specification: 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.

2. Referenced Documents

B441-22	Standard Specification for Copper-Cobalt-Beryllium Alloy, Copper-Nickel-Beryllium Alloy, Copper-Nickel-Lead-Beryllium Alloy, and Copper-Nickel-Cobalt Alloy Rod and Bar
B249/B249M-23	Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
B194-22	Standard Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B601-18a	Standard Classification for Temper Designations for Copper and Copper Alloys´Wrought and Cast (Includes all amendments and changes 10/24/2018).
B846-19a	Standard Terminology for Copper and Copper Alloys (Includes all amendments and changes 8/8/2019).
B950-23	Standard Guide for Editorial Procedures and Form of Product Specifications for Copper and Copper Alloys
E8/E8M-24	Standard Test Methods for Tension Testing of Metallic Materials
E18-22	Standard Test Methods for Rockwell Hardness of Metallic Materials
E527-23	Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E1004-23	Standard Test Method for Determining Electrical Conductivity Using the Electromagnetic (Eddy Current) Method

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