ASTM B740-21 - 1.10.2021
 
1. Scope

1.1?This specification establishes requirements for copper-nickel-tin alloy strip for Copper Alloy UNS Nos. C72700, C72900, and C72650 in the following alloys:

Copper Alloy UNS No.

Nominal Composition Weight %

Copper

Nickel

Tin

C72700

85

9

6

C72900

77

15

8

C72650

87.5

7.5

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 only to the test method(s) described in this specification.

1.3.1?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.

1.4?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

B846-19a

Standard Terminology for Copper and Copper Alloys (Includes all amendments and changes 8/8/2019).

E3-11(2017)

Standard Guide for Preparation of Metallographic Specimens

E8/E8M-24

Standard Test Methods for Tension Testing of Metallic Materials

E75-76(1996)

Standard Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys

E290-22

Standard Test Methods for Bend Testing of Material for Ductility

E478-08(2017)

Standard Test Methods for Chemical Analysis of Copper Alloys

B820-23

Standard Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip

B248-22

Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled Bar

B598-14

Standard Practice for Determining Offset Yield Strength in Tension for Copper Alloys

B601-18a

Standard Classification for Temper Designations for Copper and Copper Alloys´Wrought and Cast (Includes all amendments and changes 10/24/2018).