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Standard Test Methods for Chemical Analysis of Ferroniobium

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Standard Test Methods for Chemical Analysis of Ferroniobium


1.1 These test methods cover the chemical analysis of ferroniobium having chemical compositions within the following limits:

ElementConcentration, %
Aluminum2.00 max
Carbon0.30 max
Chromium2.00 max
Cobalt0.25 max
Lead0.01 max
Manganese3.00 max
Niobium40.00 to 75.00
Phosphorus0.05 max
Silicon4.00 max
Sulfur0.03 max
Tantalum7.00 max
Tin0.15 max
Titanium5.00 max
Tungsten0.50 max

1.2 The test methods appear in the following order:

Separation of Niobium, Tantalum, and Titanium
by the Ion-Exchange Test Method
Titanium by the Photometric Test Method [0.05 % to 5.0 %]17-21
Niobium by the Gravimetric Test Method [40 % to 75 %]22-23
Tantalum by the Gravimetric Test Method [1 % to 7 %]24-25
Tantalum by the Photometric Test Method [0.25 % to 1 %]26-30

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 6, and specific warning statements in 11.1.

10.1 These test methods cover the determination of niobium, tantalum, and titanium in ferroniobium from 40 % to 75 %, 0.25 % to 7 %, and 0.05 % to 5.0 %, respectively.

Significance and Use

These test methods for the chemical analysis of metals and alloys are primarily intended to test such materials for compliance with compositional specifications such as Specification A550. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.


chemical analysis; ferroniobium; niobium; tantalum; titanium; Chemical analysis--metals/alloys; Columbium content--metals/alloys; Ferroalloys; Ferroniobium; Tantalum (Ta) content--metals/alloys; Titanium content--metals/alloys; ICS Number Code 77.040.30 (Chemical analysis of metals)

To find similar documents by ASTM Volume:

03.05 (Analytical Chemistry for Metals, Ores, and Related Materials: E 32 - latest)

To find similar documents by classification:

77.040.30 (Chemical analysis of metals Chemical analysis in general, see 71.040.40 Chemical analysis of ferrous metals, see 77.080 Chemical analysis of ferroalloys, see 77.100 Chemical analysis of non-ferrous metals, see 77.120 Chemical analysis of sintered metals and hard metals, see 77.160)

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Document Number


Revision Level




Modification Type

Revision with Title Change

Publication Date

Oct. 1, 2009

Document Type

Test Method

Page Count

6 pages

Committee Number