ASTM E352-13 Chemical Analysis of Tool Steels

The standard test methods for the chemical analysis of tool steels and other similar medium and high-alloy steels are covered under the ASTM E352-13 standard test. These test methods for the chemical analysis of metals and alloys are primarily intended as referee methods to test such materials for compliance with compositional specifications.

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Scope:

ASTM E352-13 standard method covers the test methods for chemical analysis of tool steels and other similar medium and high-alloy steels with specified chemical compositions limits. The test methods in this standard are contained under the sections as follows:

Test Methods	Sections
Manganese by the Periodate Photometric Method (0.10 to 5.00%)	8
Phosphorus by the Molybdenum Blue Photometric Method (0.002 to 0.05%)	18
Sulfur by the Combustion-Iodate Titration Method (0.005 to 0.4 %)	36
Silicon by the Gravimetric Method (0.10 to 2.50%)	45
Cobalt by the Ion-Exchange—Potentiometric Titration Method (2 to 14%)	52
Cobalt by the Nitroso-R-Salt Photometric Method (0.10 to 5.0%)	60
Copper by the Sulfide Precipitation-Electrodeposition Gravimetric Method (0.01 to 2.0 %)	70
Carbon, Total, by the Combustion Gravimetrical Method (0.05 to 2.50 %)	78
Copper by the Neocuproine Photometric Method (0.01 to 2.00%)	89
Lead by the Ion-Exchange—Atomic Absorption Method (0.001 to 0.001%)	99
Phosphorus by the Alkalimetric Method (0.01 to 0.05%)	136
Nickel by the Dimethylglyoxime Gravimetric Method (0.1 to 4.0%)	144
Tin by the Solvent Extraction—Atomic Absorption Method (0.002 to 0.10%)	152
Molybdenum by the Photometric Method (0.01 to 1.50%)	162
Chromium by the Atomic Absorption Method (0.006 to 1.00%)	174
Chromium by the Peroxydisulfate Oxidation-Titration Method (0.10 to 14.00%)	184
Vanadium by the Atomic Absorption Method (0.006 to 0.15%)	193
Molybdenum by the Ion Exchange–8-Hydroxyquinoline Gravimetric Method	203

Results:

Chromium is determined by Atomic Absorption Spectrophotometer method. The sample is dissolved in mineral acids and the residue fused, dissolved, and solution combined. The sample solution is aspirated into a nitrous oxide-acetylene flame of an atomic absorption spectrophotometer. Spectral energy at approximately 3579 A° from a chromium hollow-cathode lamp is passed through the flame and the absorbance is measured. The spectrophotometer is calibrated with solutions of known chromium concentrations.

Test Specimen	Percent Chromium
No.1	0.149
No.2	0.693
No.3	0.961

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