ASTM B327-98e1
(Specification)Standard Specification for Master Alloys Used in Making Zinc Die Casting Alloys
Standard Specification for Master Alloys Used in Making Zinc Die Casting Alloys
SCOPE
1.1 This specification covers aluminum-base and zinc-base master alloys used to make zinc die-casting alloys. Alloy compositions specified for aluminum-base master alloys (hardeners) are designated as shown in Table 1. Alloy composition specified for the zinc-base master alloy is designated as shown in Table 2.
1.2 Aluminum alloy hardeners are added to Special High Grade zinc (per Specification B6) in the proper alloying ratios, as shown in Table 1 , to produce zinc alloys for die casting.
1.3 Zinc-base master alloy is added to Special High Grade zinc (per Specification B6) in the proper alloying ratio, as shown in Table 3, to produce zinc alloy for die casting.
1.4 Master alloys may be supplied in the form of shot, bar, ingot or jumbo ingot as specified by the purchaser.
1.5 The values stated in inch-pound units are standard. The SI equivalents of inch-pound units are for information only.
1.6 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 become familiar with all hazards including those identified in the appropriate Material Data Sheet for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
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e1
Designation: B 327 – 98 An American National Standard
Standard Specification for
Master Alloys Used in Making Zinc Die Casting Alloys
This standard is issued under the fixed designation B 327; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—The caveat in section 1.6 and section 3. Terminology were added editorially in December 2000.
1. Scope E 34 Test Methods for Chemical Analysis of Aluminum and
Aluminum–Base Alloys
1.1 This specification covers aluminum–base and zinc–
E 88 Practice for Sampling Nonferrous Metals and Alloys
base master alloys used to make zinc die-casting alloys. Alloy
in Cast Form for Determination of Chemical Composition
compositions specified for aluminum–base master alloys (hard-
E 101 Test Method for Spectrographic Analysis of Alumi-
eners) are designated as shown in Table 1. Alloy composition
num and Aluminum Alloys by the Point-to-Plane Tech-
specified for the zinc-base master alloy is designated as shown
nique
in Table 2.
E 227 Test Method for Optical Emission Spectrometric
1.2 Aluminum alloy hardeners are added to Special High
Analysis of Aluminum and Aluminum Alloys by the
Grade zinc (per Specification B 6) in the proper alloying ratios,
Point-to-Plane Technique
as shown in Table 1, to produce zinc alloys for die casting.
E 527 Practice for Numbering Metals and Alloys (UNS)
1.3 Zinc-base master alloy is added to Special High Grade
E 536 Test Method for Chemical Analysis of Zinc and Zinc
zinc (per Specification B 6) in the proper alloying ratio, as
Alloys
shown in Table 3, to produce zinc alloy for die casting.
1.4 Master alloys may be supplied in the form of shot, bar,
3. Terminology
ingot or jumbo ingot as specified by the purchaser.
3.1 Terms shall be defined in accordance with Terminology
1.5 The values stated in inch-pound units are standard. The
B 899.
SI equivalents of inch-pound units are for information only.
1.6 This standard does not purport to address all of the
4. Ordering Information
safety concerns, if any, associated with its use. It is the
4.1 Orders for master alloys under this specification shall
responsibility of the user of this standard to become familiar
include the following information:
with all hazards including those identified in the appropriate
4.1.1 Quantity,
Material Data Sheet for this product/material as provided by
4.1.2 Alloy (Table 1 or Table 2),
the manufacturer, to establish appropriate safety and health
4.1.3 Form: that is, shot, bar, ingot or jumbo ingot,
practices, and determine the applicability of regulatory limi-
4.1.4 Size: that is, maximum shot size or size of bar, ingot,
tations prior to use.
or jumbo ingot,
2. Referenced Documents 4.1.5 Unit weight: that is, nominal weight of shot per bag or
nominal weight of each bar, ingot, or jumbo ingot,
2.1 The following documents of the issue in effect on date
4.1.6 Markings on shot bags, bars, ingot or jumbo ingot,
of order acceptance form a part of this specification to the
4.1.7 Palletizing, if required: means of palletizing and
extent referenced herein:
maximum weight per pallet load,
2.2 ASTM Standards:
2 4.1.8 Place of inspection (Section 8), and
B 6 Specification for Zinc
4.1.9 Specification number and date.
B 899 Terminology Relating to Non-ferrous Metals and
Alloys
5. Materials and Manufacture
E 29 Practice for Using Significant Digits in Test Data to
5.1 The material may be made by any suitable process.
Determine Conformance with Specifications
5.2 The material covered by this specification shall be of
uniform quality and shall be free of dross, flux, or other
harmful contamination. Also, if the material is in shot form, it
This specification is under the jurisdiction of ASTM Committee B02 on
shall be sound, uniform in size, and free of a heavily oxidized
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.04 on Zinc and Cadmium.
Current edition approved Apr. 10, 1998. Published September 1998. Originally
published as B 327 – 58. Last previous edition B 327 – 95. Annual Book of ASTM Standards, Vol 03.05.
2 5
Annual Book of ASTM Standards, Vol 02.04. Annual Book of ASTM Standards, Vol 01.01.
3 6
Annual Book of ASTM Standards, Vol 14.02. Annual Book of ASTM Standards, Vol 03.06.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
B 327
TABLE 1 Chemical Requirements for Aluminum–Base Master Alloy (Hardeners)
NOTE 1—The following applies to all specified limits in this table: For purposes of determining conformance with this specification, the observed value
or calculated value obtained from analysis shall be rounded off “to the nearest unit” in the last right hand place of figures used in expressing the specified
limit, in accordance with the rounding method of Practice E 29.
Composition, percent
ASTM
Alu- Manga- Chro- Cad-
Alloy Silicon, Nickel, Tin, Lead,
B
minum, Copper Iron, max nese, Magnesium Zinc mium, mium, Usage
A B
(UNS) max max max max
B
min max max max
ZG71A 87.0 1.7 max 0.8 0.7 0.50 0.65–1.05 6.5–7.5 0.20 0.20 0.02 0.020 0.010 1 part by weight of ZG71A, 21 parts
C
(A07131) by weight of Special High Grade zinc
to make ASTM zinc Alloy Z33520
(AG40A)
A
UNS designations were established in accordance with Recommended Practice E 527.
B
Carried to one additional decimal place to ensure proper control in the final alloy.
C
ASTM Specification B 6, for Zinc.
A
TABLE 2 Chemical Requirements for Zinc-Base Master Alloys
same alloy, not less than five samples shall be taken at random
B,C
,
from the carload for sampling. If the shipment is in less than
Composition, percent
carload lots, the following shall apply:
Common
Alum- Mag- Iron, Copper, Lead, Cadmium, Tin,
(UNS)
Zinc
6.2.2.1 Aluminum-base master alloys—One sample shall be
inum nesium max max max max max
V12 11.7– 0.075– 0.070 0.25 0.005 0.004 0.003 remain-
taken for each 6000 lb (2722 kg) or fraction thereof. When it
(Z33730) 12.6 0.12 der
is deemed necessary, a sample may be taken from each melt of
A
Zinc-base master alloy Z33730 used for producing die casting alloys may
500 lb (227 kg) or more of the alloy.
contain nickel, chromium, silicon, and manganese up to 0.02, 0.02, 0.035 and
0.05 %, respectively. No harmful effects have ever been noted due to the presence 6.2.2.2 Zinc-base master alloys—One sample shall be taken
of these elements in up to these concentrations in die casting alloys and, therefore,
for each 10 000 lb (4536 kg) or fraction thereof. When
analyses are not required for these elements, except that nickel analysis is
necessary, a sample may be taken from each melt of 1000 lb
required when producing die casting alloy Z33522.
B
The UNS assignations were established in accordance with Practice E 527.
(454 kg) or more.
C
For purposes of determining conformance with this specification, the observed
6.2.3 A sample may consist of an ingot or bar. In the case of
value or calculated value obtained from analysis shall be rounded off “to the
nearest unit” in the last right hand place of figures used in expressing the specified metal in shot form, a small representative lot of the s
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