ASTM E1306-94(2004)
(Practice)Standard Practice for Preparation of Metal and Alloy Samples by Electric Arc Remelting for the Determination of Chemical Composition
Standard Practice for Preparation of Metal and Alloy Samples by Electric Arc Remelting for the Determination of Chemical Composition
SCOPE
1.1 This practice covers the preparation of solid samples of reactive and refractory metals and alloys by electric arc remelting. The samples for melting may be in the form of chips, turnings, wires, and sponge. Powdered metals need to be compacted before melting.
1.1.1 This practice is also suitable for preparation of solid samples of other metals, such as steels, stainless steels, tool steels, nickel, nickel alloys, cobalt, and cobalt alloys by electric arc remelting.
1.2 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. Specific hazard statements are given in Section 9.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E1306–94 (Reapproved 2004)
Standard Practice for
Preparation of Metal and Alloy Samples by Electric Arc
Remelting for the Determination of Chemical Composition
This standard is issued under the fixed designation E 1306; 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 5. Significance and Use
1.1 This practice covers the preparation of solid samples of 5.1 This sampling practice is useful for converting chips,
reactive and refractory metals and alloys by electric arc turnings, and wires taken from ingots or other solid materials
remelting. The samples for melting may be in the form of into a homogeneous solid sample suitable for direct excitation
chips, turnings, wires, and sponge. Powdered metals need to be on an optical emission or X-ray fluorescence spectrometer.The
compacted before melting. resultant button may itself be chipped to provide samples for
1.1.1 This practice is also suitable for preparation of solid plasma emission, atomic absorption, and wet chemical analy-
samples of other metals, such as steels, stainless steels, tool sis.
steels,nickel,nickelalloys,cobalt,andcobaltalloysbyelectric 5.2 This practice has been used extensively for the prepa-
arc remelting. ration of zirconium, zirconium alloy, titanium, and titanium
1.2 This standard does not purport to address all of the alloy materials, and is applicable to other reactive, refractory,
safety concerns, if any, associated with its use. It is the ferrous and nonferrous alloys, such as cobalt, cobalt alloys,
responsibility of the user of this standard to establish appro- columbium (niobium), nickel, nickel alloys, stainless steels,
priate safety and health practices and determine the applica- tantalum, tool steels, and tungsten.
bility of regulatory limitations prior to use. Specific hazard
6. Interferences
statements are given in Section 9.
6.1 Test samples of known composition shall be used to
2. Referenced Documents
determine if there is any selective volatilization or segregation
2.1 ASTM Standards: of the impurity elements. Elements known to volatilize are
E 135 Terminology Relating to Analytical Chemistry for bismuth, cadium, chlorine, lead, magnesium, sodium, tellu-
Metals, Ores, and Related Materials rium, thallium, uranium, and zinc. Other elements that may
change in content are the interstitial gases, oxygen, nitrogen,
3. Terminology
and hydrogen, plus carbon, which may be added due to the
3.1 Definitions—For definitions of terms used in this prac- graphite anode.Atungsten anode may be substituted if carbon
tice, refer to Terminology E 135.
pickup is a concern. Copper contamination also may be
introduced from the melting crucible.
4. Summary of Practice
7. Apparatus
4.1 Metal chips, turnings, or wires are melted into a button
1 1
approximately 1 ⁄4 in. in diameter and approximately ⁄4-in. 7.1 ElectricArc Remelt Furnace—An apparatus suitable for
thick using an electric arc furnace.The action of the arc creates
this practice is shown schematically in Fig. 1. It shall be
agitation and mixing of the molten metal which produces a equipped as follows:
homogeneous sample.
7.1.1 Water-Cooled Upper Housing (1), approximately 6-in.
diameter and 6 ⁄4 in. high, and having a smooth, flat sealing
surface.
This practice is under the jurisdiction of ASTM Committee E01 on Analytical
7.1.2 Rubber Boot (2), shall cover the anode manipulator
Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of
assembly to prevent electrical shock.
Subcommittee E01.20 on Fundamental Practices.
Current edition approved May 1, 2004. Published June 2004. Originally
e1
approved in 1989. Last previous edition approved in 1998 as E 1306 – 94 (1998) .
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 A commercially available unit, including expendable parts, manufactured by
the ASTM website. Cianflone Scientific Instruments Corp., Pittsburgh, PA, has been found satisfactory.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E1306–94 (2004)
1 1
8.2 Anode, graphite, ⁄2-in. diameter and 2 ⁄2 in. long with a
tapered tip.
9. Hazards
9.1 Wear safety glasses with side shields, or full face shield.
9.2 Wearinsulatedgloveswhenchanginghotelectrodesand
handling hot buttons.
9.3 An electrical shock hazard exists if the rubber boot is
removed from around the anode manipulator assembly at the
top of the furnace.
9.4 An exhaust vent shall be installed over the furnace to
remove any harmful fumes that may be given off during the
melting cycle.
10. Preparation of Apparatus
10.1 Initial Setup—Refer to Fig. 1.
Legend: 10.1.1 Attach the cooling water to the apparatus and adjust
(1) Anode Housing (7) Hydraulic Jack
the flowrate to ⁄4 L/min.
(2) Rubber Boot (8) D-C Electrical Welder
10.1.2 Attach the argon supply and adjust the two-stage
(3) Relief Valve (9) Pressure Regulator
(4) Inlet Fittings for Argon (10) Vacuum Pump
regulator output to 6 psi (41 kPa).
(5) Outlet Fitting for Vacuum (11) Control Panel
10.1.3 Attach the vacuum pump.
(6) Crucible Housing (12) Power Cable
10.1.4 Attach the d-c electric welder to the apparatus at the
FIG. 1 Schematic of Electric Arc Remelt Furnace
control panel.
10.1.5 Attach the graphite anode to the manipulator assem-
bly.
7.1.3 The top of the housing shall be fabricated from an
10.2 Preparation of Anode—The lifetime of the anode can
electrical and thermal insulating material, such as Bakelite, and
be extended significantly by dipping it into the molten metal.
shall support the following items:
When this proced
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.