Abstract
This specification establishes the requirements for copper-nickel-tin spinodal alloy strips with Copper Alloy UNS Nos. C72700, C72900, and C72650. Tempers are available as follows: TB00 (solution heat treated), TD01 to TD12 (solution heat treated and cold worked), TX00 or TS01 to TS12 (spinodal hardened), or TM00 to TM08 (mill hardened). Materials shall be prepared and tested accordingly to examine their conformance to mechanical (tensile and yield strength, elongation, ductility, and bend ratio), chemical composition, and grain size requirements. Retests shall be performed on any lot of material that fails to adhere to specified requirements due to inadequate heat treatment, or fails to meet bend test requirements.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1. Scope
1.1 This specification establishes requirements for copper-nickel-tin alloy strip 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 Units—The values stated in inch-pound units and the values stated in SI units in Table 5 are to be regarded as standard, except for grain size which is stated in metric units only. The values given in parentheses are mathematical conversions to SI units and 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) 
The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
B248 Specification for General Requirements for Wrought Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled Bar
B598 Practice for Determining Offset Yield Strength in Tension for Copper Alloys
B601 Classification for Temper Designations for Copper and Copper Alloys--Wrought and Cast
B820 Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip
B846 Terminology for Copper and Copper Alloys
E3 Guide for Preparation of Metallographic Specimens
E8 Test Methods for Tension Testing of Metallic Materials
E75 Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys
E290 Test Methods for Bend Testing of Material for Ductility
E478 Test Methods for Chemical Analysis of Copper Alloys
Keywords
age hardening; copper-nickel-tin; spinodal; strip ; UNS C72650; UNS C72700; UNS C72900; Age-hardening alloys--specifications; Copper alloy plate/sheet/strip/rolled bar--specifications; Copper-nickel alloys--specifications; Copper-nickel-tin; Spinodal alloy strip; UNS C72650 (copper-nickel tin alloy); UNS C72700 (copper-nickel tin spinoidal alloy); UNS C72900 (copper-nickel tin spinodal alloy);
ICS Code
ICS Number Code 77.150.30 (Copper products)
DOI: 10.1520/B0740-09
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