ASTM B327-01(2005)
(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
ABSTRACT
This specification covers aluminum-base and zinc-base master alloys used to make zinc die-casting alloys. The material may be made by any suitable process. The material covered by this specification shall be of uniform quality and shall be free of dross, flux, or other harmful contamination. If the material is in shot form, it shall be sound, uniform size, and free of a heavily oxidized surface coating, stringers, and moisture. Aluminum-base master alloys (hardeners) shall be tested and conform to the required chemical composition for aluminum, copper, iron, silicon, manganese, magnesium, zinc, chromium, nickel, tin, lead, and cadmium. Zinc-base master alloys shall conform to the color code requirements and to the required alloy composition for aluminum, magnesium, iron, copper, lead, cadmium, tin, and zinc. The weight of jumbo ingots shall conform to the required weight limits.
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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Standards Content (Sample)
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Designation: B 327 – 01 (Reapproved 2005)
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.
1. Scope* E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This specification covers aluminum–base and zinc–
E34 Test Methods for ChemicalAnalysis ofAluminum and
base master alloys used to make zinc die-casting alloys. Alloy
Aluminum-Base Alloys
compositionsspecifiedforaluminum–basemasteralloys(hard-
E88 Practice for Sampling Nonferrous Metals and Alloys
eners) are designated as shown in Table 1. Alloy composition
in Cast Form for Determination of Chemical Composition
specified for the zinc-base master alloy is designated as shown
E 101 Test Method for Spectrographic Analysis of Alumi-
in Table 2.
num and Aluminum Alloys by the Point-to-Plane Tech-
1.2 Aluminum alloy hardeners are added to Special High
nique
Grade zinc (per SpecificationB6) in the proper alloying ratios,
E 227 Test Method for Optical Emission Spectrometric
as shown in Table 1, to produce zinc alloys for die casting.
Analysis of Aluminum and Aluminum Alloys by the
1.3 Zinc-base master alloy is added to Special High Grade
Point-to-Plane Technique
zinc (per Specification B6) in the proper alloying ratio, as
E 527 Practice for Numbering Metals and Alloys (UNS)
shown in Table 3, to produce zinc alloy for die casting.
E 536 TestMethodsforChemicalAnalysisofZincandZinc
1.4 Master alloys may be supplied in the form of shot, bar,
Alloys
ingot or jumbo ingot as specified by the purchaser.
1.5 The values stated in inch-pound units are standard. The
3. Terminology
SI equivalents of inch-pound units are for information only.
3.1 Terms shall be defined in accordance with Terminology
1.6 This standard does not purport to address all of the
B 899.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to become familiar
4. Ordering Information
with all hazards including those identified in the appropriate
4.1 Orders for master alloys under this specification shall
Material Safety Data Sheet (MSDS) for this product/material
include the following information:
as provided by the manufacturer, to establish appropriate
4.1.1 Quantity,
safety and health practices, and determine the applicability of
4.1.2 Alloy (Table 1 or Table 2),
regulatory limitations prior to use.
4.1.3 Form: that is, shot, bar, ingot or jumbo ingot,
4.1.4 Size: that is, maximum shot size or size of bar, ingot,
2. Referenced Documents
or jumbo ingot,
2.1 The following documents of the issue in effect on date
4.1.5 Unit weight: that is, nominal weight of shot per bag or
of order acceptance form a part of this specification to the
nominal weight of each bar, ingot, or jumbo ingot,
extent referenced herein:
2 4.1.6 Markings on shot bags, bars, ingot or jumbo ingot,
2.2 ASTM Standards:
4.1.7 Palletizing, if required: means of palletizing and
B6 Specification for Zinc
maximum weight per pallet load,
B 899 Terminology Relating to Non-ferrous Metals and
4.1.8 Place of inspection (Section 8), and
Alloys
4.1.9 Specification number and date.
B 908 Practice for the Use of Color Codes for Zinc Casting
Alloy Ingot
5. Materials and Manufacture
5.1 The material may be made by any suitable process.
This specification is under the jurisdiction of ASTM Committee B02 on
5.2 The material covered by this specification shall be of
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
uniform quality and shall be free of dross, flux, or other
B02.04 on Zinc and Cadmium.
harmful contamination. Also, if the material is in shot form, it
Current edition approved Nov. 1, 2005. Published February 2006. Originally
e2
approved in 1958. Last previous edition approved in 2001 as B 327 – 01 .
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Withdrawn.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 327 – 01 (2005)
TABLE 1 Chemical Requirements for Aluminum-Base Master Alloys
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 PracticeE29.
Composition, percent
ASTM
Alu- Manga- Chro- Cad-
Alloy
Iron, Silicon, Nickel, Tin, Lead,
B
minum, Copper nese, Magnesium Zinc mium, mium, Usage
A B
(UNS) max 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
(A07131) parts by weight of Special High
C
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 B6, for Zinc.
A,B,C
TABLE 2 Chemical and Color Code Requirements for Zinc-Base Master Alloys
Composition, percent
Common Color
Alum- Mag- Iron, Copper, Lead, Cadmium, Tin,
D
(UNS) Code Zinc
inum nesium max max max max max
V12 Pink 11.7– 0.075– 0.070 0.25 0.005 0.004 0.003 remain-
(Z33730) 12.6 0.12 der
A
Zinc-base master alloy Z33730 used for producing die casting alloys may 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 of these elements in up to these concentrations in die casting alloys and, therefore, analyses
are not required for these elements, except that nickel analysis is required when producing die casting alloy Z33522.
B
The UNS assignations were established in accordance with Practice E 527.
C
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 E29.
D
Refer to Practice B 908. (Note: Colors indicated are for North American applications.)
TABLE 3 Weight Requirements for Zinc-Base Master Alloy
6.2.2.1 Aluminum-base master alloys—One sample shall be
Jumbo Ingots
taken for each 6000 lb (2722 kg) or fraction thereof. When it
NOTE 1—These requirements are based on the use of nominal 2400 lb is deemed necessary, a sample may be taken from each melt of
or 1200 lb jumbo ingots of V12 (Z33730).
500 lb (227 kg) or more of the alloy.
A
Nominal Weight Range, lb
6.2.2.2 Zinc-base master alloys—One sample shall be taken
Usage
Weight, lb Minimum Maximum
for each 10 000 lb (4536 kg) or fraction thereof. When
2400 2325 2475 1 part by weight of V12 (one 2400 lb jumbo
necessary, a sample may be taken from each melt of 1000 lb
ingot), 2 parts by weight (two 2400 lb jumbo
ingots) of Special High Grade zinc to make
(454 kg) or more.
ASTM zinc alloy Z33520 (AG40A).
6.2.3 Asa
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