Astm e 1085 16

Designation: E1085 − 16

Standard Test Method for

Analysis of Low-Alloy Steels by Wavelength Dispersive

X-Ray Fluorescence Spectrometry 1

This standard is issued under the fixed designation E1085; 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 (´) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This test method covers the wavelength dispersive

X-ray fluorescence analysis of low-alloy steels for the follow￾ing elements:

Element Mass Fraction

Range, %

Calcium 0.001 to 0.007

Chromium 0.04 to 2.5

Cobalt 0.03 to 0.2

Copper 0.03 to 0.6

Manganese 0.04 to 2.5

Molybdenum 0.005 to 1.5

Nickel 0.04 to 3.0

Niobium 0.002 to 0.1

Phosphorus 0.010 to 0.08

Silicon 0.06 to 1.5

Sulfur 0.009 to 0.1

Vanadium 0.012 to 0.6

NOTE 1—Unless exceptions are noted, mass fraction ranges can be

extended and additional elements can be included by the use of suitable

reference materials and measurement conditions. Deviations from the

published scope must be validated by experimental means. See Guide

E2857 for information on validation options.

1.2 The values stated in the International System of Units

(SI) are to be regarded as standard. The values given in

parentheses are mathematical conversions to other units that

are provided for information only, because they may used in

older software and laboratory procedures.

1.3 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 appro￾priate safety and health practices and determine the applica￾bility of regulatory limitations prior to use. Specific precau￾tionary statements are given in Section 10.

2. Referenced Documents

2.1 ASTM Standards:2

E29 Practice for Using Significant Digits in Test Data to

Determine Conformance with Specifications

E135 Terminology Relating to Analytical Chemistry for

Metals, Ores, and Related Materials

E691 Practice for Conducting an Interlaboratory Study to

Determine the Precision of a Test Method

E1361 Guide for Correction of Interelement Effects in

X-Ray Spectrometric Analysis

E1621 Guide for Elemental Analysis by Wavelength Disper￾sive X-Ray Fluorescence Spectrometry

E2857 Guide for Validating Analytical Methods

3. Terminology

3.1 For definitions of terms used in this test method, refer to

Terminology E135.

4. Summary of Test Method

4.1 The test specimen is finished to a clean uniform surface

and then irradiated with a primary X-ray beam of high energy.

The secondary X-rays produced are dispersed by means of

crystals, and the intensities (also called count rates) are

measured by suitable detectors at selected wavelengths. Radia￾tion measurements are made based on the time required to

reach a fixed number of counts, or on the total counts obtained

for a fixed time. Mass fractions of the elements are determined

by relating the measured intensities from unknown specimens

to analytical curves prepared with suitable reference materials.

Either a fixed-channel, polychromator system or a sequential,

wavelength dispersive monochromator system may be used to

provide simultaneous or sequential determinations of elements,

respectively.

1 This test method is under the jurisdiction of ASTM Committee E01 on

Analytical Chemistry for Metals, Ores, and Related Materials and is the direct

responsibility of Subcommittee E01.01 on Iron, Steel, and Ferroalloys.

Current edition approved May 1, 2016. Published June 2016. Originally

approved in 1987. Last previous edition approved in 2009 as E1085 – 09. DOI:

10.1520/E1085-16.

2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or

contact ASTM Customer Service at [email protected]. For Annual Book of ASTM

Standards volume information, refer to the standard’s Document Summary page on

the ASTM website.

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