ASTM B969/B969M-18e1

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.
´1
Designation: B969/B969M − 18
Standard Specification for
Aluminum-Alloy Castings Produced by Squeeze Casting,
and the Semi-Solid Thixocast and Rheocast Casting
Processes
This standard is issued under the fixed designation B969/B969M; 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 (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Footnote C of Tables X2.2, X2.4, and X2.6 was revised editorially in August 2018.
1. Scope* Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This specification covers aluminum-alloy castings, pro-
Barriers to Trade (TBT) Committee.
duced by Squeeze Casting, and the Semi-Solid Thixocast and
Rheocast casting processes, designated as shown in Table 1.
2. Referenced Documents
1.2 This specification is for aluminum-alloy squeeze
2.1 The following documents of the issue in effect on the
castings, and semi-solid Thixocast and Rheocast castings used
date of casting purchase form a part of this specification to the
in general purpose applications. It may not address the me-
extent referenced herein:
chanical properties, integrity testing, and verification required
2.2 ASTM Standards:
for highly loaded or safety critical applications.
B179 Specification for Aluminum Alloys in Ingot and Mol-
1.3 Alloy and temper designations are in accordance with
ten Forms for Castings from All Casting Processes
ANSI H35.1/H35.1 (M).
B275 Practice for Codification of Certain Zinc, Tin and Lead
1.4 Unless the order specifies the “M” specification
Die Castings (Withdrawn 2020)
designation, the material shall be furnished to the inch-pound B557 Test Methods for Tension Testing Wrought and Cast
units. Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast
1.5 For acceptance criteria for inclusion of new aluminum
Aluminum- and Magnesium-Alloy Products (Metric)
and aluminum alloys and their properties in this specification,
B660 Practices for Packaging/Packing of Aluminum and
see Annex A1 and Annex A2.
Magnesium Products
1.6 The values stated in either SI units or inch-pound units
B666/B666M Practice for Identification Marking of Alumi-
are to be regarded separately as standard. The values stated in
num and Magnesium Products
each system may not be exact equivalents; therefore, each
B881 Terminology Relating to Aluminum- and Magnesium-
system shall be used independently of the other. Combining
Alloy Products
values from the two systems may result in non-conformance
B917/B917M Practice for Heat Treatment of Aluminum-
with the standard.
Alloy Castings From All Processes
1.7 This standard does not purport to address all of the
B985 Practice for Sampling Aluminum Ingots, Billets, Cast-
safety concerns, if any, associated with its use. It is the
ings and Finished or Semi-Finished Wrought Aluminum
responsibility of the user of this standard to establish appro-
Products for Compositional Analysis
priate safety, health, and environmental practices and deter-
D3951 Practice for Commercial Packaging
mine the applicability of regulatory limitations prior to use.
E8/E8M Test Methods for Tension Testing of Metallic Ma-
1.8 This international standard was developed in accor-
terials
dance with internationally recognized principles on standard-
E23 Test Methods for Notched Bar Impact Testing of Me-
ization established in the Decision on Principles for the
tallic Materials
1 2
This test method is under the jurisdiction of ASTM Committee B07 on Light For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Aluminum Alloy Ingots and Castings. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 15, 2018. Published June 2018. Originally the ASTM website.
approved in 2009. Last previous edition approved in 2017 as B969/B969M – 17. The last approved version of this historical standard is referenced on
DOI: 10.1520/B0969_B0969M-18E01. www.astm.org.
*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
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B969/B969M − 18
A,B,C,D
TABLE 1 Chemical Composition Limits
E
OTHERS
I
DESIGNATION Si Fe Cu Mn Mg Cr Ni Zn Ti Ag Be Pb Sn Zr FNs Al Min.
F
Each Total
319.0 5.5–6.5 1.0 3.0–4.0 0.50 0.10 . . . 0.35 1.0 0.25 . . . . . . 0.50 . . . . . . . . . . . . 0.50 Rem.
G G
355.0 4.5–5.5 0.6 1.0–1.5 0.50 0.40–0.6 0.25 . . . 0.35 0.25 . . . . . . 0.05 0.15 . . . . . . . . . 0.05 0.15 Rem.
G G
356.0 6.5–7.5 0.6 0.25 0.35 0.20–0.45 0.35 0.25 0.05 0.15 . . . . . . . . . 0.05 0.15 Rem.
A356.0 6.5–7.5 0.20 0.20 0.10 0.25–0.45 0.10 0.20 0.05 0.15 . . . . . . . . . 0.05 0.15 Rem.
357.0 6.5–7.5 0.15 0.05 0.03 0.45–0.6 . . . . . . 0.05 0.20 . . . . . . 0.05 0.15 . . . . . . . . . 0.05 0.15 Rem.
366.0 6.5–7.5 0.15 0.05 0.03 0.5–1.2 0.05 0.20 0.05 0.15 . . . . . . . . . 0.05 0.15 Rem.
380.0 7.5–9.5 2.0 3.0–4.0 0.50 0.10 . . . 0.50 3.0 . . . 0.35 . . . . . . 0.50 . . . . . . . . . . . . 0.50 Rem.
H
A390.0 16.0–18.0 0.50 4.0–5.0 0.10 0.45–0.65 . . . . . . 0.10 0.20 . . . . . . 0.10 0.20 . . . . . . . . . 0.10 0.20 Rem.
A
When single units are shown, they indicate the maximum amounts permitted.
B
Analysis shall be made for the elements for which limits are shown in this table.
C
The following applies to all specified limits in this table: For purposes of determining conformance to these limits, an observed value or a calculated value obtained from analysis shall be rounded to the nearest unit
in the last right-hand place of figures used in expressing the specified limit in accordance with the rounding-off method of Practice E29.
D
In case of discrepancy between the values listed in Table 1 and those listed in the “Designations and Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (known as the “Pink Sheets”)”,
the composition limits registered with the Aluminum Association and published in the “Pink Sheets” shall be considered the controlling composition.
E
“Others” includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in the specification. However, such analysis
is not required and may not cover all metallic “Others” elements. Should any analysis by the producer or the purchaser establish that an “Others” element exceeds the limit of “Each” or that the aggregate of several “Others”
elements exceeds the limit of “Total,” the material shall be considered nonconforming.
F
Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.
G
If iron exceeds 0.45, manganese content shall not be less than one-half iron content.
H
The Aluminum Association ruling on the number of decimal places to which Mg percent is expressed is exempted for some long standing alloys. See A2.2.6.
I
For a cross reference of current and former alloy designations see the Aluminum Association’s “Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (The Pink
Sheets)”.
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B969/B969M − 18
E29 Practice for Using Significant Digits in Test Data to cision) Engineering and Design: Additional Specification
Determine Conformance with Specifications Guidelines
E34 Test Methods for Chemical Analysis of Aluminum and G-6-1-15 Pressure Tightness in Die Cast Parts
Aluminum-Base Alloys (Withdrawn 2017) G-6-2-15 Fillets, Ribs and Corners in Die Cast Parts (1 of 2)
E94 Guide for Radiographic Examination Using Industrial G-6-3-15 Fillets, Ribs and Corners in Die Cast Parts (2 of 2)
Radiographic Film G-6-4-15 Ejector Pins, Pin Marks and Pin Flash
E155 Reference Radiographs for Inspection of Aluminum G-6-5-15 Casting Flash removal
and Magnesium Castings G-6-6-15 Surface Finish, As Cast
E165 Practice for Liquid Penetrant Testing for General G-6-7-15 Die Cast Lettering and Ornamentation
Industry 2.6 Federal Standard:
E505 Reference Radiographs for Inspection of Aluminum
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
and Magnesium Die Castings
2.7 Military Standard:
E607 Test Method for Atomic Emission Spectrometric
MIL-STD-129 Marking for Shipment and Storage (Military
Analysis Aluminum Alloys by the Point to Plane Tech-
Agencies)
nique Nitrogen Atmosphere (Withdrawn 2011)
MIL-STD-276 Impregnation of Porous Nonferrous Metal
E716 Practices for Sampling and Sample Preparation of
Castings
Aluminum and Aluminum Alloys for Determination of
2.8 SAE Standard:
Chemical Composition by Spark Atomic Emission Spec-
AMS 2771 Heat Treatment of Aluminum Alloy Castings
trometry
2.9 Naval Standard:
E1251 Test Method for Analysis of Aluminum and Alumi-
NAVSEA Technical Publication S9074-AR-GIB-010/278
num Alloys by Spark Atomic Emission Spectrometry
2.10 Aluminum Association Standard:
E2422 Digital Reference Images for Inspection of Alumi-
Designations and Chemical Composition Limits for Alumi-
num Castings
num Alloys in the Form of Castings and Ingot (The Pink
2.3 ANSI Standard:
Sheets)
H35.1/H35.1 (M)-2006 American National Standard Alloy
2.11 Other Standards:
and Temper Designation Systems for Aluminum
EN 14242 Aluminum and Aluminum Alloys—Chemical
2.4 NADCA Standards: Analysis—Inductively Coupled Plasma Optical Emission
#403 Product Specification Standards for Die Castings Pro- Spectral Analysis
duced by the Semi-Solid and Squeeze Casting Processes
3. Terminology
2.5 NADCA Product Specification Standards for Die Cast-
3.1 Definitions—Refer to Terminology B881 for definitions
ings:
of product terms used in this specification.
Engineering and Design: Coordinate Dimensioning
S-4A-1-15 Linear Dimensions: Standard Tolerances
3.2 Definitions of Terms Specific to This Standard:
S-4A-2-15 Parting Line: Standard Tolerances
3.2.1 die casting, n—a casting produced by introducing
S-4A-3-15 Moving Die Components (MDC): Standard Tol-
molten metal under substantial pressure into a metal die and
erances
characterized by a high degree of fidelity to the die cavity.
S-4A-4-15 Draft Requirements: Standard Tolerances
3.2.2 rheocasting, n—semi-solid casting process in which
S-4A-5-15 Flatness Requirements: Standard Tolerances
the thixotropic aluminum alloy feed-stock is produced at the
S-4A-6-15 Cored Holes for Cut Threads: Standard Toler-
die cast machine and injected whilst in its thixotropic state into
ances
a metal die cavity without an intermediate solidification stage.
S-4A-8-15 Cored Holes for Pipe Threads: Standard Toler-
3.2.3 semi-solid casting (SSM), n—a casting process
ances
wherein a partially solidified metal slurry is injected into a die
P-4A-1-15 Linear Dimensions: Precision Tolerances
cavity to form cast components.
P-4A-2-15 Parting Line: Precision Tolerances
P-4A-3-15 Moving Die Components (MDC): Precision Tol- 3.2.4 semi-solid slurry, n—a mixture of solid spherical or
erances
globular primary phase dispersed in liquid, and which exhibits
P-4A-4-15 Draft Requirements: Precision Tolerances thixotropic behavior.
P-4A-5-15 Flatness Requirements: Precision Tolerances
3.2.5 slurry, n—a thick suspension of solids in a liquid.
P-4A-6-15 Cored Holes for Cut Threads: Precision Toler-
3.2.6 squeeze casting, n—a process whereby a metal prod-
ances
uct is produced by injecting molten metal at a relatively slow
P-4A-7-15 Cored Holes for Formed Threads: Precision Tol-
speed through a large ingate into a metal die and held under
erances
high pressure until solidification is complete.
S/P-4-9-15 Machining Stock Allowances (Standard and Pre-
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Available from Aluminum Association, Inc., 1400 Crystal Drive Suite 430 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
Arlington, VA 22202, http://www.aluminum.org. dodssp.daps.dla.mil.
5 7
Available from North American Die Casting Association, (NADCA,) 241 Available from European Committee for Standardization (CEN), 36 Rue de
Holbrook Drive, Wheeling, IL 60090 (www.diecasting.org). Stassart, B-1050, Brussels, Belgium, http://www.cenorm.be.
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B969/B969M − 18
3.2.7 thixocasting, n—semi-solid casting process wherein 4.3.2 Whether chemical analysis and tensile property re-
the feed-stock is a pre-cast slug of aluminum alloy capable of ports are required (see 7.3 and 22, Table 1, Table X2.1 [Table
acting in a thixotropic manner, that has been heated to its X2.2], Table X2.3 [Table X2.4], and Table X2.5 [Table X2.6]),
thixotropic state and injected into a metal die cavity and
4.3.3 Whether foundry control is required (Section 9),
allowed to solidify.
4.3.4 Whether mechanical property tests are required (Sec-
tions 10, 11, 14, Table X2.1 [Table X2.2], Table X2.3 [Table
3.2.8 thixotropic, adj—a property of some materials to flow
X2.4], and Table X2.5 [Table X2.6]),
like a high viscosity liquid when a force is applied and
maintain form when the force is removed. 4.3.5 Whether yield strength tests are required (Footnote D
in Table X2.1 [Table X2.2], Table X2.3 [Table X2.4], and Table
4. Ordering Information
X2.5 [Table X2.6]),
4.3.6 Whether heat treatment is to be performed in accor-
4.1 Orders for material under this specification shall include
dance with AMS 2771 or other practices (Section 16),
the following information:
4.3.7 Whether repairs are permissible (Section 18),
4.1.1 This specification designation (which includes the
number, the year, and the revision letter, if applicable), 4.3.8 Whether inspection is required at the producer’s works
(Section 19),
NOTE 1—For inch-pound application, specify Specification B969 and
4.3.9 Whether surface requirements will be checked visu-
for metric application specify Specification B969M. Do not mix units.
ally or by observational standards where such standards are
4.1.2 Alloy (Section 7 and Table 1),
established (20.1),
4.1.3 Temper (Section 11, Table X2.1 [Table X2.2], Table
4.3.10 Whether liquid penetrant inspection is required
X2.3 [Table X2.4], and Table X2.5 [Table X2.6]),
(20.2),
4.1.4 Applicable drawing or part number, and
4.3.11 Whether radiographic inspection is required and, if
4.1.4.1 Drawing of casting, when required, giving all nec-
so, the radiographic grade of casting required (20.3 and Table
essary dimensions and showing latest revisions and allowances
2),
for linear dimensions (12.2), parting lines (see 12.3), moving
4.3.12 Whether certification is required (Section 22),
die components (12.4), draft (12.5), flatness (12.6), cored hole
threads (12.7 – 12.9), and machining stock (12.10). Location of 4.3.13 Whether the Practice B666/B666M applies to the
ejector pin marks or parting lines shall be at the option of the marking of castings, (24.1),
producer, unless specifically designated on the drawing.
4.3.14 Whether Practices B660 apply and, if so, the levels of
4.1.5 The quantity in either pieces or pounds [kilograms].
preservation, packaging and packing required (25.4),
4.3.15 Whether marking in accordance with
4.2 Additional tests, options, and special inspection require-
Fed. Std. No. 123, Practice D3951, or MIL-STD-129 apply
ments as provided below should be justified only on the basis
(25.3 and 25.4).
of need. These shall be specified in the contract or purchase
order, as additional procedures and extended delivery time may
5. Manufacture
be involved,
4.3 Additionally, orders for material to this specification 5.1 The responsibility of furnishing castings that can be laid
shall include the following information when required by the out and machined to the final dimensions within the permis-
purchaser: sible variations specified, as shown on the blueprints or
4.3.1 Whether squeeze casting process or the semi-solid drawings, shall rest with the producer, except when the die is
thixocast or rheocast process is to be used to produce the parts, furnished by the purchaser.
TABLE 2 Discontinuity-Level Requirements for Aluminum Castings in Accordance with Reference Radiographs E155 or Digital Refer-
ence Radiographs E2422
A
Discontinuity Grade A Grade B Grade C Grade D
Section Thickness, in. (mm)
1 3 1 3 1 3 1 3
⁄4 to ⁄4 ⁄4 ⁄4 ⁄4 ⁄4 ⁄4 ⁄4
[6 to 19-mm] [6-mm] [19-mm] [6-mm] [19-mm] [6-mm] [19-mm]
Gas holes none 1 1 2 2 5 5
Gas porosity (round) none 1 1 3 3 7 7
Gas porosity (elongated) none 1 1 3 4 5 5
B B B
Shrinkage cavity none 1 2 3
Shrinkage porosity or sponge none 1 1 2 2 4 3
Foreign material (less dense material) none 1 1 2 2 4 4
Foreign material (more dense material) none 1 1 2 1 4 3
Segregation none none none none
Cracks none none none none
Cold shuts none none none none
Surface irregularity not to exceed drawing tolerance
Core shaft not to exceed drawing tolerance
A
Caution should be exercised in requesting Grade A because of the difficulty in obtaining this level.
B
No radiographs available. Use ⁄4-in [6-mm] for all thicknesses.
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B969/B969M − 18
6. Quality Assurance performed in accordance with Practices E716, Test Methods
E34, E607, or E1251, or EN 14242 (ICP method).
6.1 Responsibility for Inspection—When specified in the
contract or purchase order, the producer or supplier is respon- 7.3 When a chemical analysis is required with a shipment, it
sible for the performance of all inspection and test require- shall be called for in the contract or purchase order.
ments specified herein. Except as otherwise specified in the
7.4 If the producer’s or supplier’s method of composition
contract or order, the producer or supplier may use his own or
control is acceptable, sampling for chemical analysis may be
any other suitable facilities for the performance of the inspec-
waived at the discretion of the purchaser.
tion and test requirements specified herein, unless disapproved
by the purchaser. The purchaser shall have the right to perform
8. Material Requirements (Castings Produced for
any of the inspections and tests set forth in this specification.
Governmental and Military Agencies)
Quality assurance standards shall be agreed upon between the
8.1 Unless otherwise specified, only aluminum alloy con-
producer or supplier and purchaser at the time a contract or
forming to the requirements of Specification B179 or produc-
order is placed.
er’s foundry scrap (identified as being made from alloy
6.2 Lot Definition—An inspection lot shall be defined as
conforming to Specification B179) shall be used in the remelt-
follows:
ing furnace from which molten metal is taken for pouring
6.2.1 An inspection lot shall consist of the production from
directly into castings. Additions of small amounts of modifiers
each die or compound die on each machine for each 24 h
and grain refining elements or alloys are permitted.
during the first week (or five calendar days) of continuous
8.1.1 Pure materials, recycled materials, and master alloys
normal operation and the production for each 48 h thereafter of
may be used to make alloys conforming to this specification,
continuous normal operation. (Normal operations are those
provided chemical analysis can be taken and adjusted to
without occurrences such as, but not limited to, equipment
conform to Table 1 prior to pouring any castings.
breakdowns, unscheduled work stoppages, out of control
situations, and so forth.) Castings inspected by this method
9. Foundry Control (Castings Produced for
shall be so marked or handled during the finishing operations
Governmental or Military Agencies, or Both)
as not to lose their identity.
9.1 When specified, castings shall be produced under
6.2.2 Normal operation shall be considered production in
foundry control approved by the purchaser. Foundry control
the absence of any significant change in the machine, alloy
shall consist of examination of castings by radiographic or
composition, die, or continuity of operation. Should significant
other approved methods for determining internal discontinui-
changes occur they shall be considered as the start of a new lot.
ties until the gating, pouring, and other foundry practices have
6.2.3 Each casting of a randomly selected sample shall be
been established to produce castings meeting the quality
examined to determine conformance to the requirements with
standards furnished by the purchaser or agreed upon between
respect to general quality, dimensions, and identification mark-
the purchaser and the producer. When foundry practices have
ing. The producer or supplier may use a system of statistical
been so established, the production method shall not be
quality control for such examinations.
significantly changed without demonstrating to the satisfaction
6.3 All testing shall be performed in accordance with
of the purchaser that the change does not adversely affect the
applicable ASTM test methods.
quality of the castings. Minor changes in pouring temperature
of 650°F [625°C] from the established nominal temperature
7. Chemical Composition
are permissible.
7.1 The product shall conform to the chemical composition
10. Mechanical Properties
limits prescribed in Table 1. Conformance shall be determined
by the producer by taking samples at the time castings are
10.1 Unless specified in the contract or purchase order or
poured in accordance with Practices E716 and analyzed in
specifically guaranteed by the manufacturer, acceptance of die
accordance with Test Methods E34, E607, or E1251, or
castings under these specifications shall not depend on me-
EN 14242. If the producer has determined the composition of
chanical properties determined by tension or impact tests.
the material during casting, they shall not be required to sample
10.2 When specified in the contract or purchase order, the
and analyze the finished product.
castings shall withstand proof tests without failure as defined
7.1.1 A sample for determination of chemical composition
by agreement between the purchaser and the producer or
shall be taken to represent one of the following:
supplier.
7.1.1.1 For production runs of less than 8 h, one sample
from each die or compound die on each machine.
11. Tensile Properties
7.1.1.2 For production runs of more than 8 h, one sample
from each die or compound die on each machine every 8 h. 11.1 The tensile properties shall be determined in accor-
dance with Test Methods B557 [B557M].
7.2 If it becomes necessary to analyze castings for confor-
mance to chemical composition limits, the method used to 11.2 If Grade D quality castings as described in Table 2 are
sample castings for the determination of chemical composition specified, no tensile tests shall be specified nor tensile require-
shall be in accordance with Practice B985. Analysis shall be ments be met on specimens cut from castings.
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B969/B969M − 18
12. Dimensions, Mass, and Permissible Variations 12.11 Dimensional tolerance deviations waived by the pur-
chaser shall be confirmed in writing to the producer or supplier.
12.1 Permissible variations in dimensions shall be within
the limits specified on the drawings or in the contract or
13. General Quality
purchase order.
13.1 Imperfections inherent in the castings shall not be
12.2 Linear Dimensions—Unless otherwise specified on the
cause for rejection provided it is demonstrated that the castings
drawing or in the contract or purchase order, linear dimension
are in accordance with the requirements and standards agreed
tolerances shall conform to NADCA Product Specification
upon.
Standard S-4A-1-15, Standard Tolerances, or by agreement
13.2 Internal Soundness—When specified, the soundness of
between the producer and the supplier, P-4A-1-15, Precision
Tolerances. the castings shall conform to standards or requirements agreed
upon between the producer or supplier and the purchaser. The
12.3 Parting Lines—Unless otherwise specified on the
number and extent of imperfections shall not exceed those
drawing or in the contract or purchase order, parting line
specified by the purchaser. The standards or requirements may
dimension tolerances shall conform to NADCA Product Speci-
consist of radiographs in accordance with Reference Radio-
fication Standard S-4A-2-15, Standard Tolerances, or by agree-
graphs E505, photographs or sectioned castings.
ment between the producer and the supplier, P-4A-2-15,
13.3 Pressure Tightness—When specified in the contract or
Precision Tolerances.
purchase order, the pressure tightness of the castings shall
12.4 Moving Die Components—Unless otherwise specified
conform to standards agreed upon between the purchaser and
on the drawing or in the contract or purchase order, moving die
the producer or supplier, or as prescribed in NADCA Product
component dimension tolerances shall conform to NADCA
Specification Standards for Die Castings G-6-1-15.
Product Specification Standard S-4A-3-15, Standard
13.4 Fillets, Ribs and Corners—Unless otherwise specified
Tolerances, or by agreement between the producer and the
in the contract or purchase order fillets, ribs and corners shall
supplier, P-4A-3-15, Precision Tolerances.
conform to NADCA Product Specification Standards for Die
12.5 Draft—Unless otherwise specified on the drawing or in
Castings G-6-2-15 and G-6-3-15.
the contract or purchase order, draft tolerance dimensions shall
13.5 Ejector Pins, Pin Marks, Pin Flash, and Flash
conform to NADCA Product Specification Standard S-4A-4-
Removal—Unless otherwise specified in the contract or pur-
15, Standard Tolerances, or by agreement between the pro-
chase order ejector pins, pin marks, pin flash, and flash removal
ducer and the supplier, P-4A-4-15, Precision Tolerances.
shall conform to NADCA Product Specification Standards for
12.6 Flatness—Unless otherwise specified on the drawing
Die Castings G-6-4-15 and G-6-5-15.
or in the contract or purchase order, flatness dimensional
13.6 Casting Flash Removal—Unless otherwise specified in
tolerances shall conform to NADCA Product Specification
the contract or purchase order casting flash removal shall
Standard S-4A-5-15, Standard Tolerances, or by agreement
conform to NADCA Product Specification Standards for Die
between the producer and the supplier, P-4A-5-15, Precision
Castings G-6-5-15.
Tolerances.
13.7 Surface Finish—When specified in the contract or
12.7 Cored Holes for Cut Threads—Unless otherwise speci-
purchase order the as-cast surface finish required shall conform
fied on the drawing or in the contract or purchase order, the
to standards agreed upon between the purchaser and the
dimensional tolerances for cored holes for cut threads shall
producer or supplier, or as prescribed in NADCA Product
conform to NADCA Product Specification Standard S-4A-6-
Specification Standards for Die Castings G-6-6-15.
15, Standard Tolerances, or by agreement between the pro-
ducer and the supplier, P-4A-6-15, Precision Tolerances.
13.8 Die Cast Lettering and Ornamentation—Unless other-
wise specified in the contract or purchase order, cast lettering
12.8 Cored Holes for Pipe Threads—Unless otherwise
and ornamentation shall conform to NADCA Product Specifi-
specified on the drawing or in the contract or purchase order,
cation Standards for Die Castings G-6-7-15.
the dimensional tolerances for cored holes for cut threads shall
conform to NADCA Product Specification Standard S-4A-8-
13.9 Machining Stock Allowances—Unless otherwise speci-
15.
fied in the contract or purchase order, cast machining stock
allowances shall conform to NADCA Product Specification
12.9 Cored Holes for Formed Threads—Unless otherwise
Standards for Die Castings standard allowances shown in
specified on the drawing or in the contract or purchase order,
S/P-4-9-15.
the dimensional tolerances for cored holes for cut threads shall
conform to NADCA Product Specification Standard P-4A-7-
13.10 Workmanship—Die castings shall be of uniform
15. quality, free of injurious discontinuities that will adversely
affect their serviceability.
12.10 Machining Stock—Unless otherwise specified on the
drawing or in the contract or purchase order, allowances for
14. Number of Tests and Retests
machining stock shall conform to the standard tolerances
detailed in NADCA Product Specification Standard S/P-4-9- 14.1 Unless otherwise agreed upon between the purchaser
15, or by agreement between the producer and the supplier, the and producer, a minimum of two tension test specimens shall
precision tolerances shown in S/P-4-9-15. be tested to represent the following:
´1
B969/B969M − 18
14.1.1 For production runs of less than 8 h, one sample from 18.1.1 When welding is permitted, it shall be done by
each die or compound die on each machine. methods suitable for the particular alloy. Welding methods
14.1.2 For production runs of more than 8 h, but less than 24 shall be in accordance with such specifications as are refer-
h, one sample from each die or compound die on each machine enced on the applicable drawings, or as are required by the
every 8 h. contract or order.
14.1.3 For production runs longer than 24 h, an inspection 18.1.2 All welding shall be done by qualified welders
lot as defined in 6.2.1. approved by the purchaser.
14.1.4 If any test specimen shows defective machining or 18.1.3 When castings are to be supplied in the heat-treated
flaws, it may be discarded; in which case the purchaser and the condition, they shall be heat treated to the required temper after
producer shall agree upon the selection of another spec
...