Standard Specification for Crucibles, Ignition, Laboratory, Metal

SCOPE
1.1 This specification covers two types of metal ignition crucibles, nickel or platinum, complete with covers, for laboratory use.

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Publication Date
26-Feb-1981
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ASTM E785-81(2001) - Standard Specification for Crucibles, Ignition, Laboratory, Metal
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 785 – 81 (Reapproved 2001)
Standard Specification for
Crucibles, Ignition, Laboratory, Metal
This standard is issued under the fixed designation E 785; 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 3.1.1 Type I—Nickel.
Capacity: 100 mL
1.1 This specification covers two types of metal ignition
250 mL
crucibles, nickel or platinum, complete with covers, for labo-
3.1.2 Type II—Platinum.
ratory use.
Capacity: 20 mL
2. Referenced Documents
4. Materials
2.1 ASTM Standards:
4.1 Type I—Crucibles and covers shall be made from
B 162 Specification for Nickel Plate, Sheet, and Strip
3 99.4 % nickel, spun and hardened in conformance with Speci-
2.2 Federal Specifications:
fication B 162.
PPP-B-601 Box, Wood, Cleated-Plywood
4.2 Type II—Crucibles and covers shall be made from
PPP-B-621 Box, Wood, Nailed and Lock Corner
99.9 % platinum plus iridium, with the iridium content of not
PPP-B-636 Box, Shipping, Fiberboard
more than 0.4 %.
PPP-C-843 Cushioning, Material, Cellulosic
PPP-F-320 Fiberboard, Corrugated and Solid, Sheet Stock
5. Physical Requirements
(Container Grade), and Cut Shapes
5.1 Crucibles shall have a standard shape with a flat base to
UU-P-553 Paper, Wrapping, Tissue
give a firm and stable resting surface. The side wall shall form
2.3 Federal Standards:
a sloping and convex surface extending up to the brim.
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
Crucibles shall be of one-piece construction.
2.4 Military Specification:
5.2 Covers shall be flat, sunken in the center, and shall have
MIL-P-116 Methods of Preservation-Packaging
an extension to serve as a handle.The sunken area in the center
2.5 Military Standards:
shall fit inside the crucible.
MIL-STD-105 Sampling Procedures and Tables for Inspec-
tion by Attributes
6. Dimensions, Mass, and Permissible Variations
MIL-STD-129 Marking for Shipment and Storage
6.1 Type I crucibles and covers shall conform to the re-
MIL-STD-1188 Commercial Packaging of Supplies and
quirements of Table 1.
Equipment
6.2 Type II Crucibles and Covers:
6.2.1 Type II crucibles shall conform to the requirements of
3. Classification
Table 2.
3.1 Types and Capacities—The crucibles shall be furnished
6.2.2 Type II covers shall conform to the requirements of
in one or more of the following types or capacities as specified
Table 3.
(see S2.1).
7. Workmanship
7.1 Crucibles and covers shall be free of defects (scratches,
This specification is under the jurisdiction of ASTM Committee E41 on
dents, discolorations) or contamination (grease, oil, foreign
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
Apparatus. matter) that detract from their appearance or that impair their
Current edition approved Feb. 27, 1981. Published April 1981.
serviceability.
Available from Naval Publications and Forms Center, 5801 Tabor Ave.,
Philadelphia, Pa. 19120.
8. Keywords
Applications for copies should be addressed to the Uniform Classification
Committee, 202 Union Station, Chicago, IL 60606. 8.1 crucibles; ignition; nickel; platinum
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E 785
TABLE 1 Crucible Dimensions (Type I)
A
Outside Wall OD
A A B
Capacity, Bottom OD , Length incl. Inside Diameter of
B A
Diameter, Height, mm Thickness , Exclusive of Wall Thickness, mm
mL mm Handle, mm Sunken Section, mm
mm mm Handle, mm
100 60 30 64 0.625 67 92 58 0.625
250 83 50 83 0.625 92 116 83 0.625
A
Tolerance 6 2 mm.
B
Tolerance 6 0.25 mm.
TABLE 2 Crucible Dimensions (Type II)
Capacity, Top Inside Bottom Inside Thickness of Thickness of
Height, mm Weight, g
mL Diameter, mm Diameter, mm Side, mm Bottom, mm
20 32.4 6 0.8 19 6 1.0 34.5 6 2.0 0.22 6 0.05 0.25 6 0.05 16 6 1.0
TABLE 3 Cover Requirements (Type II)
Outside Diameter
Length Including Diameter of Sun- Depth of Sunken
Thickness, mm Excluding Handle, Weight, g
Handle, mm ken Section, mm Section, mm
mm
0.137 6 0.01 36.4 6 0.2 47 6 0.5 31.5 6 0.5 3.0 6 0.3
SUPPLEMENTARY REQUIREMENTS
The following supplementary requirements are binding when this specification is used by the
Department of Defense and the Federal Government for the procurement of platinum evaporating
dishes.
S1. Sampling S2.3.1.2 Crucibles, not otherwise indexed. Motor volume
minimum weight 24 000 lb.
S1.1 Sampling for nondestructive examination shall be
S2.3.2 Type II–Platinum.Nottakenbyfreight.ShipviaUPS
conducted in accordance with MIL-STD-105.
or parcel post.
S2. Ordering Information
S3. Lotting and Sampling
S2.1 Procurement documents should specify the following:
S3.1 A lot shall consist of the crucibles and covers of the
S2.1.1 Title, number, and date of this ASTM specification.
same type
...

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