ASTM B26/B26M-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: B26/B26M −18
Standard Specification for
Aluminum-Alloy Sand Castings
This standard is issued under the fixed designation B26/B26M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
ε NOTE—Revised Footnote B of Table 4 editorially in August 2018.
1. Scope* mendations issued by the World Trade Organization Technical
2 Barriers to Trade (TBT) Committee.
1.1 This specification covers aluminum-alloy sand castings
designated as shown in Table 1.
2. Referenced Documents
1.2 This specification is for aluminum-alloy sand castings
2.1 The following documents of the issue in effect on date
used in general purpose applications. It may not address the
of material purchase form a part of this specification to the
mechanical properties, integrity testing, and verification re-
extent referenced herein:
quired for highly loaded or safety critical applications.
2.2 ASTM Standards:
1.3 Alloy and temper designations are in accordance with
B179 Specification for Aluminum Alloys in Ingot and Mol-
ANSI H35.1/H35.1M.
ten Forms for Castings from All Casting Processes
1.4 Unless the order specifies the “M” specification
B275 PracticeforCodificationofCertainZinc,TinandLead
designation, the material shall be furnished to the inch-pound
Die Castings (Withdrawn 2020)
units.
B557 Test Methods for Tension Testing Wrought and Cast
Aluminum- and Magnesium-Alloy Products
1.5 For acceptance criteria for inclusion of new aluminum
B557M Test Methods for Tension Testing Wrought and Cast
and aluminum alloys and their properties in this specification,
Aluminum- and Magnesium-Alloy Products (Metric)
see Annex A1 and Annex A2.
B660 Practices for Packaging/Packing of Aluminum and
1.6 The values stated in either SI units or inch-pound units
Magnesium Products
are to be regarded separately as standard. The values stated in
B666/B666M Practice for Identification Marking of Alumi-
each system may not be exact equivalents; therefore, each
num and Magnesium Products
system shall be used independently of the other. Combining
B881 Terminology Relating toAluminum- and Magnesium-
values from the two systems may result in nonconformance
Alloy Products
with the standard.
B917/B917M Practice for Heat Treatment of Aluminum-
1.7 This standard does not purport to address all of the
Alloy Castings From All Processes
safety concerns, if any, associated with its use. It is the
B985 Practice for SamplingAluminum Ingots, Billets, Cast-
responsibility of the user of this standard to establish appro-
ings and Finished or Semi-Finished Wrought Aluminum
priate safety, health, and environmental practices and deter-
Products for Compositional Analysis
mine the applicability of regulatory limitations prior to use.
D3951 Practice for Commercial Packaging
1.8 This international standard was developed in accor-
E29 Practice for Using Significant Digits in Test Data to
dance with internationally recognized principles on standard-
Determine Conformance with Specifications
ization established in the Decision on Principles for the
E34 Test Methods for Chemical Analysis of Aluminum and
Development of International Standards, Guides and Recom-
Aluminum-Base Alloys (Withdrawn 2017)
E94/E94M Guide for Radiographic Examination Using In-
dustrial Radiographic Film
This specification is under the jurisdiction of ASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on
Aluminum Alloy Ingots and Castings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 15, 2018. Published June 2018. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ε1
approved in 1918. Last previous edition approved in 2014 as B26/B26M – 14 . Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/B0026_B0026M-18E01. the ASTM website.
2 4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- The last approved version of this historical standard is referenced on
cation SB-26/SB-26M in Section II of that Code. 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
´1
B26/B26M − 18
E155 Reference Radiographs for Inspection of Aluminum 4.1.1 This specification designation (which includes the
and Magnesium Castings number, year, and revision letter, if applicable),
E165/E165M Practice for Liquid Penetrant Testing for Gen-
NOTE 1—For inch-pound application, specify Specification B26 and for
eral Industry
metric application specify Specification B26M. Do not mix units.
E607 Test Method for Atomic Emission Spectrometric
4.1.2 The quantity in either pieces or pounds [kilograms],
Analysis Aluminum Alloys by the Point to Plane Tech-
4.1.3 Alloy (Section 7 and Table 1),
nique Nitrogen Atmosphere (Withdrawn 2011)
4.1.4 Temper (Section 10 and Table 2), and
E716 Practices for Sampling and Sample Preparation of
4.1.5 Applicable drawing or part number,
Aluminum and Aluminum Alloys for Determination of
4.2 Additionally, orders for material to this specification
Chemical Composition by Spark Atomic Emission Spec-
shall include the following information when required by the
trometry
purchaser:
E1251 Test Method for Analysis of Aluminum and Alumi-
4.2.1 Whether chemical analysis and tensile property re-
num Alloys by Spark Atomic Emission Spectrometry
ports are required (Table 1 and Table 2),
E2422 Digital Reference Images for Inspection of Alumi-
4.2.2 Whether castings or test bars, or both, may be artifi-
num Castings
cially aged for Alloys 705.0-T5, 707.0-T5, 712.0-T5, and
IEEE/ASTM SI 10 Standard for Use of the International
713.0-T5 (10.2) and whether yield strength tests are required
System of Units (SI): The Modern Metric System
for these alloys;
2.3 AMS Standard:
4.2.3 Whether test specimens cut from castings are required
AMS 2771 Heat Treatment of Aluminum Alloy Castings
in addition to, or instead of, separately cast specimens (Sec-
2.4 American National Standards:
tions 10 and 13);
H35.1/H35.1(M) Alloy and Temper Designation System for
4.2.4 Whether heat treatment is to be performed in accor-
Aluminum
dance with AMS 2771 (see Section 15),
2.5 Military Standards:
4.2.5 Whether repairs are permissible (16.1),
MIL-STD-129 Marking for Shipment and Storage
4.2.6 Whether inspection is required at the producer’s
MIL-STD-276 Impregnation of Porous Nonferrous Metal
works (Section 18);
Castings
4.2.7 Whether certification is required (21.1);
NAVSEA Technical Publication S9074-AR-GIB-010/278
4.2.8 Whether surface requirements shall be checked
2.6 Federal Standard:
against observational standards where such standards are
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
established (19.1);
2.7 Aluminum Association Standard:
4.2.9 Whether liquid penetrant inspection is required (19.2);
Designations and Chemical Composition Limits forAlumi-
4.2.10 Whether radiographic inspection is required and, if
num Alloys in the Form of Castings and Ingot (The Pink
so, the radiographic grade of casting required (19.3, Table 3);
Sheets)
4.2.11 Whether foundry control is required (Section 9); and
2.8 Other Standards:
4.2.12 Whether Practice B660 applies and, if so, the levels
EN 14242 Aluminum and Aluminum Alloys—Chemical
of preservation, packaging, and packing required (24.4).
Analysis—Inductively Coupled Plasma Optical Emission
5. Quality Assurance
Spectral Analysis
5.1 Unless otherwise specified in the contract or purchase
3. Terminology
order, the producer shall be responsible for the performance of
3.1 Definitions:
all inspections and test requirements specified herein. Unless
3.1.1 Refer to Terminology B881 for definitions of product
disapproved by the purchaser, the producer may use his own or
terms used in this specification.
any other suitable facilities for the performance of the inspec-
3.2 Definitions of Terms Specific to This Standard:
tion and test requirements specified herein.The purchaser shall
3.2.1 sand casting, n—a metal object produced by pouring
have the right to perform any of the inspections and tests set
molten metal into a sand mold and allowing it to solidify.
forth in this specification where such inspections are deemed
necessary to confirm that the material conforms to prescribed
4. Ordering Information
requirements.
4.1 Orders for material under this specification shall include
6. Manufacture
the following information (1.4 and 1.5):
6.1 The responsibility of furnishing castings that can be laid
out and machined to the finished dimensions within the
Available from Society of Automotive Engineers (SAE), 400 Commonwealth
permissible variations specified, as shown on the blueprints or
Dr., Warrendale, PA 15096-0001, http://www.sae.org.
6 drawings, shall rest with the producer, except where pattern
Available from Aluminum Association, Inc., 1400 Crystal Drive Suite 430
equipment is furnished by the purchaser.
Arlington, VA 22202 http://www.aluminum.org.
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:// 7. Chemical Composition
www.dodssp.daps.mil.
7.1 The Product shall conform to the chemical composition
Available from European Committee for Standardization (CEN), 36 rue de
Stassart, B-1050, Brussels, Belgium, http://www.cenorm.be. limits prescribed in Table 1. Conformance shall be determined
´1
B26/B26M − 18
A,B,C,D
TABLE 1 Chemical Composition Limits
E
OTHERS
J
Desig. Si Fe Cu Mn Mg Cr Ni Zn Ti Ag Be Pb Sn Zr - FNs Al Min.
F
Each Total
201.0 0.10 0.15 4.0–5.2 0.20–0.50 0.15–0.55 . . . . . . . . . 0.15–0.35 0.40–1.0 . . . . . . . . . . . . . . . . . . 0.05 0.10 Rem.
204.0 0.20 0.35 4.2–5.0 0.10 0.15–0.35 . . . 0.05 0.10 0.15–0.30 . . . . . . . . . 0.05 . . . . . . . . . 0.05 0.15 Rem.
242.0 0.7 1.0 3.5–4.5 0.35 1.2–1.8 0.25 1.7–2.3 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
A242.0 0.6 0.8 3.7–4.5 0.10 1.2–1.7 0.15–0.25 1.8–2.3 0.10 0.07–0.20 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
295.0 0.7–1.5 1.0 4.0–5.0 0.35 0.03 . . . . . . 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
319.0 5.5–6.5 1.0 3.0–4.0 0.50 0.10 . . . 0.35 1.0 0.25 . . . . . . . . . . . . . . . . . . . . . . . . 0.50 Rem.
328.0 7.5–8.5 1.0 1.0–2.0 0.20–0.6 0.20–0.6 0.35 0.25 1.5 0.25 . . . . . . . . . . . . . . . . . . . . . . . . 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 Rem.
C355.0 4.5–5.5 0.20 1.0–1.5 0.10 0.40–0.6 . . . . . . 0.10 0.20 . . . . . . . . . . . . . . . . . . . . . 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 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 Rem.
443.0 4.5–6.0 0.8 0.6 0.50 0.05 0.25 . . . 0.50 0.25 . . . . . . . . . . . . . . . . . . . . . . . . 0.35 Rem.
B443.0 4.5–6.0 0.8 0.15 0.35 0.05 . . . . . . 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
512.0 1.4–2.2 0.6 0.35 0.8 3.5–4.5 0.25 . . . 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
514.0 0.35 0.50 0.15 0.35 3.5–4.5 . . . . . . 0.15 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
520.0 0.25 0.30 0.25 0.15 9.5–10.6 . . . . . . 0.15 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
535.0 0.15 0.15 0.05 0.10–0.25 6.2–7.5 . . . . . . . . . 0.10–0.25 . . . 0.003–0.007 . . . . . . . . . 0.005B . . . 0.05 0.15 Rem.
705.0 0.20 0.8 0.20 0.40–0.6 1.4–1.8 0.20–0.40 . . . 2.7–3.3 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
707.0 0.20 0.8 0.20 0.40–0.6 1.8–2.4 0.20–0.40 . . . 4.0–4.5 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
I
710.0 0.15 0.50 0.35–0.6 0.05 0.6–0.8 . . . . . . 6.0–7.0 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
I H
712.0 0.30 0.50 0.25 0.10 0.50–0.65 0.40–0.6 . . . 5.0–6.5 0.15–0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.20 Rem.
713.0 0.25 1.1 0.40–1.0 0.6 0.20–0.50 0.35 0.15 7.0–8.0 0.25 . . . . . . . . . . . . . . . . . . . . . 0.10 0.25 Rem.
771.0 0.15 0.15 0.10 0.10 0.8–1.0 0.06–0.20 . . . 6.5–7.5 0.10–0.20 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
850.0 0.7 0.7 0.7–1.3 0.10 0.10 . . . 0.7–1.3 . . . 0.20 . . . . . . . . . 5.5–7.0 . . . . . . . . . . . . 0.30 Rem.
I
851.0 2.0–3.0 0.7 0.7–1.3 0.10 0.10 . . . 0.30–0.7 . . . 0.20 . . . . . . . . . 5.5–7.0 . . . . . . . . . . . . 0.30 Rem.
I
852.0 0.40 0.7 1.7–2.3 0.10 0.6–0.9 . . . 0.9–1.5 . . . 0.20 . . . . . . . . . 5.5–7.0 . . . . . . . . . . . . 0.30 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” should 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
710.0 formerly A712.0, 712.0 formerly D712.0, 851.0 formerly A850.0, 852.0 formerly B850.0.
J
For a cross reference of current and former alloy designations see the Aluminum Association’s “Designations and Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (known as the ‘Pink
Sheets’)”.
´1
B26/B26M − 18
A,B
TABLE 2 Tensile Requirements (Inch-Pound Units)
Yield Strength Elongation in
Typical Brinell
Tensile Strength,
E C
D
Designation Temper (0.2 % offset), 2 in. or 4 x
Hardness,
min, ksi
min, ksi diameter, min, % 500 kgf, 10 mm
201.0 T7 60.0 50.0 3.0 . . .
204.0 T4 45.0 28.0 6.0 . . .
F GG
242.0 O 23.0 70
G
T61 32.0 20.0 105
G
A242.0 T75 29.0 1.0 75
295.0 T4 29.0 13.0 6.0 60
T6 32.0 20.0 3.0 75
G
T62 36.0 28.0 95
T7 29.0 16.0 3.0 70
319.0 F 23.0 13.0 1.5 70
G G
T5 25.0 80
20.0 1.5
T6 31.0 80
328.0 F 25.0 14.0 1.0 60
T6 34.0 21.0 1.0 80
355.0 T6 32.0 20.0 2.0 80
G
T51 25.0 18.0 65
G
T71 30.0 22.0 75
C355.0 T6 36.0 25.0 2.5 . . .
356.0 F 19.0 9.5 2.0 55
T6 30.0 20.0 3.0 70
GG
T7 31.0 75
G
T51 23.0 16.0 60
T71 25.0 18.0 3.0 60
A356.0 T6 34.0 24.0 3.5 80
T61 35.0 26.0 1.0 .
443.0 F 17.0 7.0 3.0 40
B443.0 F 17.0 6.0 3.0 40
512.0 F 17.0 10.0 . 50
514.0 F 22.0 9.0 6.0 50
520.0 T4 42.0 22.0 12.0 75
535.0 F 35.0 18.0 9.0 70
H
705.0 T5 30.0 17.0 5.0 65
H
707.0 T7 37.0 30.0 1.0 80
I
710.0 T5 32.0 20.0 2.0 75
I H
712.0 T5 34.0 25.0 4.0 75
713.0 T5 32.0 22.0 3.0 75
771.0 T5 42.0 38.0 1.5 100
T51 32.0 27.0 3.0 85
T52 36.0 30.0 1.5 85
T6 42.0 35.0 5.0 90
T71 48.0 45.0 2.0 120
G
850.0 T5 16.0 5.0 45
I G
851.0 T5 17.0 3.0 45
I G
852.0 T5 24.0 18.0 60
A
If agreed upon between the manufacturer and the purchaser, other mechanical properties may be obtained by other heat treatments such as annealing, aging, or stress
relieving.
B
For purposes of determining conformance with this specification, each value for tensile strength and yield strength shall be rounded to the nearest 0.1 ksi and each value
for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding method of Practice E29.
C
Refer to ANSI H35.1/H35.1M, or both, for description of tempers.
D
For information only, not required for acceptance.
E
ASTM alloy designations are recorded in Practice B275.
F
Formerly designated as 242.0-T21.
G
Not required.
H
Yield strength to be determined only when specified in the contract or purchase order.
I
710.0 formerly A712.0, 712.0 formerly D712.0, 851.0 formerly A850.0, 852.0 formerly B850.0.
by the producer by taking samples at the time castings are 7.1.3 The maximum elapsed time between determinations
poured in accordance with Practice E716 and analyzed in shall be established for each alloy, but in any case the
accordance with Test Methods E607, E1251,or E34,or
maximum elapsed time shall not exceed 8 h.
EN 14242. If the producer has determined the composition of
7.2 If it becomes necessary to analyze castings for confor-
thematerialduringcasting,theyshallnotberequiredtosample
mance to chemical composition limits, the method used to
and analyze the finished product.
sample castings for the determination of chemical composition
7.1.1 A sample for determination of chemical composition
shall be in accordance with Practice B985. Analysis shall be
shall be taken to represent one of the following:
performed in accordance with Practice E716, Test Methods
7.1.2 Not more than 4000 lb [2000 kg] of clean castings or
E34, E607,or E1251, or EN 14242 (ICP method).
a single casting poured from one furnace.
´1
B26/B26M − 18
TABLE 3 Discontinuity-Level Requirements for Aluminum Castings in Accordance with Film Reference Radiographs E155 or Digital
Reference Radiographs E2422
Section Thickness in. [mm]
A
Discontinuity Radiograph Grade A Grade B Grade C Grade D
1 3 1 3 1 3 1 3
⁄4 [6.4] ⁄4 [19.0] ⁄4 [6.4] ⁄4 [19.0] ⁄4 [6.4] ⁄4 [19.0] ⁄4 [6.4] ⁄4 [19.0]
Gas holes 1.1 none 1 1 2 2 5 5
Gas porosity (round) 1.21 none 1 1 3 3 7 7
Gas porosity (elongated) 1.22 none 1 1 3 4 5 5
B B B
Shrinkage cavity 2.1 none 1 2 3
Shrinkage porosity or sponge 2.2 none 1 1 2 2 4 3
Foreign material (less dense material) 3.11 none 1 1 2 2 4 4
Foreign material (more dense material) 3.12 none 1 1 2 1 4 3
Segregation 3.2 none none none none
Cracks . none none none none
Cold shuts . none none none none
Surface irregularity . . . . not to exceed drawing tolerance
Core shift . . . . not to exceed drawing tolerance
A
Caution should be exercised in requesting Grade A.
B
Not available.
8. Material Requirements—Castings Produced for castings on artificially aged test bars. The conditions of
Governmental and Military Agencies artificial aging shown in Practice B917/B917M shall be em-
ployed unless other conditions are accepted by mutual consent.
8.1 Unless otherwise specified, only aluminum alloy con-
forming to the requirements of Specification B179 or produc- 10.3 Whenspecified,thetensilestrength,yieldstrength,and
er’s foundry scrap (identified as being made from alloy elongation values of specimens cut from castings shall be not
conforming to Specification B179) shall be used in the remelt- less than 75 % of the tensile and yield strength values and not
ing furnace from which molten metal is taken for pouring less than 25 % of the elongation values specified in Table 2
directly into castings.Additions of small amounts of modifiers [Table 4]. The measurement of the elongation is not required
and grain refining elements or alloys are permitted. for test specimens cut from castings if 25 % of the specified
8.1.1 Pure materials, recycled materials, and master alloys minimumelongationvaluepublishedinTable2[Table4]is0.5
may be used to make alloys conforming to this specification, % or less. If grade D quality castings as described in Table 3
provided chemical analysis can be taken and adjusted to are specified, no tensile tests shall be specified nor tensile
conform to Table 1 prior to pouring any castings. requirements be met on specimens cut from castings.
9. Foundry Control—Castings Produced for
11. Workmanship, Finish, and Appearance
Governmental or Military Agencies, or Both
11.1 The finished castings shall be uniform in composition
9.1 When specified, castings shall be produced under
and free of blowholes, cracks, shrinks, and other discontinui-
foundry control approved by the purchaser. Foundry control
ties except as designated and agreed upon as acceptable by the
shall consist of examination of castings by radiographic or
purchaser.
other approved methods for determining internal discontinui-
ties until the gating, pouring, and other foundry practices have
12. Number of Tests and Retests
been established to produce castings meeting the quality
12.1 Unless otherwise agreed upon between the purchaser
standards furnished by the purchaser or agreed upon between
and producer, a minimum of two tension test specimens shall
the purchaser and the producer. When foundry practices have
be separately cast and tested to represent the following:
been so established, the production method shall not be
12.1.1 Not more than 4000 lb [2000 kg] of clean castings
significantly changed without demonstrating to the satisfaction
(gates and risers removed) or a single casting poured from one
of the purchaser that the change does not adversely affect the
furnace.
quality of the castings. Minor changes in pouring temperature
12.1.2 The castings poured continuously from one furnace
of 650°F [628°C] from the established nominal temperature
in not more than eight consecutive hours.
are permissible.
12.2 When tensile properties from castings are to be
10. Tensile Properties determined, one per melt-heat combination shall be tested
unless otherwise shown on the drawing or specified in the
10.1 The separately cast test specimens representing the
purchase order.
castings shall meet the mechanical properties prescribed in
Table 2. 12.3 If any test specimen shows defective machining or
flaws, it may be discarded; in which case the purchaser and the
10.2 Although Alloys 705.0, 707.0, 712.0, and 713.0 are
producer shall agree upon the selection of another specimen in
most frequently used in the naturally aged condition, by
its stead.
agreement between the producer and the purchaser, the cast-
ings may be artificially aged to the T5 temper. The producer 12.4 If the results of the tension tests do not conform to the
and the purchaser may also agree to base the acceptance of requirements prescribed in Table 2 [Table 4]; the test bars
´1
B26/B26M − 18
A,B
TABLE 4 Tensile Requirements (SI Units)—[Metric]
K
Elongation in
Typical Brinell
Yield Strength
K
Tensile Strength,
F C
E
Designation Temper (0.2 % offset), 5× diameter,
D Hardness,
min, MPa
D
min, MPa
min % 500 kgf, 10 mm
201.0 T7 415 345 3.0 . . .
204.0 T4 310 195 6.0 . . .
G HH
242.0 O 160 70
H
T61 220 140 105
H
A242.0 T75 200 1.0 75
295.0 T4 200 90 6.0 60
T6 220 140 3.0 75
H
T62 250 195 95
T7 200 110 3.0 70
319.0 F 160 90 1.5 70
HH
T5 170 80
T6 215 140 1.5 80
328.0 F 170 95 1.0 60
T6 235 145 1.0 80
355.0 T6 220 140 2.0 80
H
T51 170 125 65
H
T71 205 150 75
C355.0 T6 250 170 2.5 . . .
356.0 F 130 65 2.0 55
T6 205 140 3.0 70
HH
T7 215 75
H
T51 160 110 60
T71 170 125 3.0 60
A356.0 T6 235 165 3.5 80
T61 245 180 1.0 . . .
443.0 F 115 50 3.0 40
B443.0 F 115 40 3.0 40
512.0 F 115 70 . . . 50
514.0 F 150 60 6.0 50
520.0 T4 290 150 12.0 75
535.0 F 240 125 9.0 70
I
705.0 T5 205 115 5.0 65
I
707.0 T7 255 205 1.0 80
J
710.0 T5 220 140 2.0 75
J I
712.0 T5 235 170 4.0 75
713.0 T5 220 150 3.0 75
771.0 T5 290 260 1.5 100
T51 220 185 3.0 85
T52 250 205 1.5 85
T6 290 240 5.0 90
T71 330 310 2.0 120
H
850.0 T5 110 5.0 45
J H
851.0 T5 115 3.0 45
J H
852.0 T5 165 125 60
A
If agreed upon between the manufacturer and the purchaser, other mechanical properties may be obtained by other heat treatments such as annealing, aging, or stress
relieving.
B
For purposes of determining conformance with this specification, each value for tensile strength and yield strength shall be rounded to the nearest 1 MPa and each value
for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding method of Practic
...