ASTM B618/B618M-11a - 1.12.2011
 
1. Scope

1.1 This specification covers aluminum-alloy investment castings designated as shown in Table 1.

1.2 This specification is for aluminum-alloy investment castings used in general purpose applications. It may not address the mechanical properties integrity testing and verification required for highly loaded or safety critical applications.

1.3 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M). The equivalent Unified Numbering System alloy designations are in accordance with Practice E527.

1.4 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.

1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex A1 and Annex A2.

1.6 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

1.7 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

TABLE 1 Chemical Composition Requirements

Note 1—When single units are shown, these indicate the maximum amounts permitted.

Note 2—Analysis shall be made for the elements for which limits are shown in this table.

Note 3—The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated value obtained from analysis should be rounded off to the nearest unit in the last right-hand place of figures used in expressing the specified limit (Practice E29).

AlloyComposition, %
ANSIA UNSSiliconIronCopper Man-
ganese		 Mag-
nesium		 Chro-
mium		 NickelZincTitan-
ium		TinOtherB
Elements		Aluminum
EachTotalC

201.0

A02010

0.10

0.15

4.0–5.2

0.20–0.50

0.15–0.55

...

...

...

0.15–0.35

...

D

0.05

0.10

remainder

204.0

A02040

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

remainder

242.0

A02420

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

remainder

295.0

A02950

0.7–1.5

1.0

4.0–5.0

0.35

0.03

...

...

0.35

0.25

...

0.05

0.15

remainder

319.0

A03190

5.5–6.5

1.0

3.0–4.0

0.50

0.10

...

0.35

1.0

0.25

...

...

0.50

remainder

328.0

A03280

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

remainder

355.0

A03550

4.5–5.5

0.6E

1.0–1.5

0.50E

0.40–0.6

0.25

...

0.35

0.25

...

0.05

0.15

remainder

C355.0

A33550

4.5–5.5

0.20

1.0–1.5

0.10

0.40–0.6

...

...

0.10

0.20

...

0.05

0.15

remainder

356.0

A03560

6.5–7.5

0.6E

0.25

0.35E

0.20–0.45

...

...

0.35

0.25

...

0.05

0.15

remainder

A356.0

A13560

6.5–7.6

0.20

0.20

0.10

0.25–0.45

...

...

0.10

0.20

...

0.05

0.15

remainder

443.0

A04430

4.5–6.0

0.8

0.6

0.50

0.05

0.25

...

0.50

0.25

...

...

0.35

remainder

B443.0

A24430

4.5–6.0

0.8

0.15

0.35

0.05

...

...

0.35

0.25

...

0.05

0.15

remainder

514.0

A05140

0.35

0.50

0.15

0.35

3.5–4.5

...

...

0.15

0.25

...

0.05

0.15

remainder

520.0

A05200

0.25

0.30

0.25

0.15

9.5–10.6

...

...

0.15

0.25

...

0.05

0.15

remainder

535.0

A05350

0.15

0.15

0.05

0.10–0.25

6.2–7.5

...

...

...

0.10–0.25

...

F

0.05

0.15

remainder

705.0

A07050

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

remainder

707.0

A07070

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

remainder

710.0G

A07100

0.15

0.50

0.35–0.65

0.05

0.6–0.8

...

...

6.0–7.0

0.25

...

0.05

0.15

remainder

712.0G

A07120

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

remainder

713.0

A07130

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

remainder

771.0

A07710

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

remainder

850.0

A08500

0.7

0.7

0.7–1.3

0.10

0.10

...

0.7–1.3

...

0.20

5.5–7.0

...

0.30

remainder

851.0G

A08510

2.0–3.0

0.7

0.7–1.3

0.10

0.10

...

0.3–0.7

...

0.20

5.5–7.0

...

0.30

remainder

852.0G

A08520

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

remainder

A ASTM alloy designations are in Practice B275.

B “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.

C Other ElementsTotal shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.

D Contains silver 0.40–1.0 %.

E If iron exceeds 0.45 %, manganese content shall not be less than one half of the iron content.

F Contains beryllium 0.003–0.007 %, boron 0.002 % max.

G 710.0 formerly A712.0, 712.0 formerly D712.0, 851.0 formerly A850.0, 852.0 formerly B850.0.

 
2. Referenced Documents

E527-23

Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

E29-22

Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

E155-20(2026)

Standard Reference Radiographs for Inspection of Aluminum and Magnesium Castings

E94-04

Standard Guide for Radiographic Examination

E34-11

Standard Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys

D3951-18(2023)

Standard Practice for Commercial Packaging

B179-18

Standard Specification for Aluminum Alloys in Ingot and Molten Forms for Castings from All Casting Processes

E1251-25

Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry

B985-24

Standard Practice for Sampling Aluminum Ingots, Billets, Castings and Finished or Semi-Finished Wrought Aluminum Products for Compositional Analysis

E2422-22

Standard Digital Reference Images for Inspection of Aluminum Castings

IEEE/ASTM SI 10

Standard for Use of the International System of Units (SI): The Modern Metric System

H35.1/H35.1 (M)-2006

American National Standard Alloy and Temper Designation Systems for Aluminum

B881-25a

Standard Terminology Relating to Aluminum- and Magnesium-Alloy Products (Includes all amendments and changes 1/8/2026).

E716-16(2021)e2

Standard Practices for Sampling and Sample Preparation of Aluminum and Aluminum Alloys for Determination of Chemical Composition by Spark Atomic Emission Spectrometry (Includes all amendments and changes 9/7/2022).

E607-02

Standard Test Method for Atomic Emission Spectrometric Analysis Aluminum Alloys by the Point to Plane Technique Nitrogen Atmosphere

B275-14

Standard Practice for Codification of Certain Zinc, Tin and Lead Die Castings (Withdrawn 2020)

B917/B917M-25

Standard Practice for Heat Treatment of Aluminum-Alloy Castings From All Processes

B557-15(2023)

Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products

B557M-15(2023)

Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)

B660-23

Standard Practices for Packaging/Packing of Aluminum and Magnesium Products

E165-09

Standard Practice for Liquid Penetrant Examination for General Industry