ASTM B427-93

Standard Specification for Gear Bronze Alloy Castings

General Information

• Status: Historical
• Publication Date: 31-Dec-1992
• ICS: 77.150.30 - Copper products
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.05 - Castings and Ingots for Remelting

Standards Content (Sample)

ASTM BY27 93 II 0759510 0514437 440
AMERICAN SOCIETY FOR TESTING AND MATERIALS
#Tb Designation: B 427 - 93
1916 Race St Philadelphla, Pa 19103
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
If not ïicted In the current combined Index, will appear In the nexi editon.
Standard Specification for
Gear Bronze Alloy Castings'
This standard is issued under the fixed designation B 427; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (c) indicates an editorial change since the last revision or renpproval.
This slundard has been approved for irse by ugencics o/ the Dcyur~rnnit q/' D&nse C'on.stili //ir DoIl Iti(1ij.v q/'S~ii' Standards for the specf~c year of issiie which has been adopted by the Depar/niai/ oJ'De/ke.
TABLE 1 Nominal Composition
1. Scope
Copper Previously Composition, %
1.1 This specification covers five alloys whose copper
Alloy used PhOs-
alloy numbers and nominal compositions are shown in
UNS NO. Designation Copper Tin Nickel Lead ohoms
Table 1. The castings may be furnished as one of three types:
C90800 A 87.8 12.0 , . . o 0.2
static chill, centrifugal chill, or sand cast.
C91700 0 86.3 12.0 1.5 O 0.2
1.2 The values stated in inch-pound units are to be
C90700 . 87.8 11.0 . . . o 0.2
regarded as the standard. The values given in parentheses are 88.0 10.3 1.5 O 0.2
C91600 C
C92900 D 83.5 10.0 3.5 2.8 0.2
for information purposes only.
2. Referenced Documents
4. Materials and Manufacture
2.1 The following documents of the issue in effect on date
4.1 The castings are to be made by the agreed and
of material purchase form a part of this specification to the
approved method.
extent referenced herein:
4.2 The castings shall be made in accordance with such
2.1.1 ASTM Standards:
practice as to obtain the mechanical properties prescribed in
B 208 Practice for Preparing Tension Test Specimens for
this specification.
Copper-Base Alloys for Sand, Permanent Mold, Centrif-
ugal, and Continous Castings3
5. Chemical Composition
E 8 Test Methods of Tension Testing of Metallic Mate-
5.1 The material in the castings shall conform to the re-
rials4
quirements as to chemical composition prescribed in Table
E 29 Practice for Using Significant Digits in Test Data to
2.
Determine Conformance with Specifications5
5.2 These specification limits do not preclude the pres-
E 54 Test Methods for Chemical Analysis of Special
ence of other elements. Limits may be established by agree-
Brasses and Bronzes6
ment between manufacturer or supplier and purchaser for
E 527 Practice for Numbering Metals and Alloys (UNS)7
these unnamed elements, Copper may be given as remainder
and may be taken as the difference between the sum of all
3. Ordering Information
elements analyzed and 100 %. When all the named elements
3.1 Orders for material to this specification shall include
in Table 2 are analyzed, their sum shall be as specified in
the following information:
Table 3.
3. l. 1 Quantity,
3.1.2 Name of material (gear bronze),
6. Mechanical Properties
3.1.3 Type of material (Section i),
6.1 The castings shall conform to the requirements as to
3.1.4 Alloy (Section i),
mechanical properties prescribed in Table 4.
3.1.5 Dimensions (see 8. i),
3.1.6 Certification, if required (see 15. i),
7. Hardness Control
3.1.7 Product marking, if required (see 16. i), and
7.1 The purchaser can select at random any number of
3.1.8 Specification title, number, and year of issue.
castings from a given lot (see Note 1) to determine the
hardness at or within 1 in. (25.4 mm) of the cast outside
diameter or as indicated on the purchaser's drawing. Deter-
I This specification is under the jurisdiction of ASTM Committee B-5 on
Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.05
mination of hardness at or near the root diameter is optional
on Casting and Ingots for Remelting.
and should be agreed upon by the consumer and producer.
Current edition approved Jan 15, 1993. Published March 1993. Originally
Any gear that fails to meet hardness requirements specified
published as B 427 - 65 T. Last previous edition B 427 - 90.
2 The UNS system for copper and copper alloys(see Practice E 527) is a simple
in Table 4 is subject to rejection.
expansion ofihe former standard designation system accomplished by the addition
NOTE I-The lot shall consist of all gears produced from one melt of
of a prefix "C" and a suffx "OO." The suillx can be used to accommodate
metal.
composition variations of the base alloy.
Anniral Bwk of ASTM Standards, Vol 02.0 I.
4 Anniial Book of ASTM Standards, Vols 02.01 and 03.01.
8. Dimensions, Weights, and Permissible Variations
5 Annirul Book of ASTM Slandards, Vol 14.02.
8.1 Variations in dimensions and weights
...