ASTM D2475-22

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D2475 −22
Standard Specification for
1
Felt
This standard is issued under the fixed designation D2475; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers all standard types of felt in the
form of rolls and sheets that are suitable for mechanical use. D123 Terminology Relating to Textiles
3
D461 Test Methods for Felt (Withdrawn 2003)
Certain special-purpose felts are also covered.
D4845 Terminology Relating to Wool
1.2 This specification is not applicable to felt-like products
2.2 Federal Standard:
that utilize weaving, knitting, stitching, or bonding such as
4
C-F-206, Felt Sheet: Cloth Felt, Wool, Pressed
papermaker’s felt.
2.3 Felt Manufacturers Council:
5
1.3 Tradepracticeinthefeltindustrydealsinpounds,yards,
FS14-68/71 Wool Felt Standard Specifications
6
and inches, therefore the values stated in inch-pound units are
2.4 SAE Standard:
to be regarded as standard. The values in SI units are provided
J314b Felts-Wool and Part Wool
as information only.
3. Terminology
1.3.1 The specification referenced in 2.2 uses only inch-
pound units.
3.1 Definitions:
3.1.1 felt, n—a textile structure characterized by interlock-
1.4 This international standard was developed in accor-
ing and consolidation of its constituent fibers.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Development of International Standards, Guides and Recom-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
mendations issued by the World Trade Organization Technical
Standards volume information, refer to the standard’s Document Summary page on
Barriers to Trade (TBT) Committee.
the ASTM website.
3
The last approved version of this historical standard is referenced on
www.astm.org.
4
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
1
This specification is under the jurisdiction of ASTM Committee D13 on Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
5
Textiles and is the direct responsibility of Subcommittee D13.13 on Wool and Felt. Available from the Northern TextileAssociation, 230 Congress Street, Boston,
CurrenteditionapprovedJune1,2022.PublishedJuly2022.Originallyapproved MA 02110.
6
in 1965. Last previous edition approved in 2013 as D2475 – 01(2013) which was Available from the Society of Automotive Engineers, 2 Pennsylvania Plaza,
withdrawn in January 2022 and reinstated in June 2022. DOI: 10.1520/D2475-22. New York, NY 10001.
TABLE 1 Wool Sheet Felt: Thickness and Mass (Weight)
2 2
Thickness, in. Thickness, mm Mass (Weight) lb/yd Mass (Weight) kg/m
ASTM (NTA)
Color Tolerances Tolerances
Class
Nominal Nominal Nominal Tolerances Nominal Tolerances
Sheets Cut Parts Sheets Cut Parts
26S1 White 0.125 ± 0.014 ± 0.016 3.17 ± 0.35 ± 0.41 1.50 ± 0.10 0.81 ± 0.05
26S4 Gray 0.188 0.016 0.018 4.78 0.41 0.46 2.25 0.15 1.22 0.08
0.250 0.020 0.022 6.35 0.51 0.56 3.00 0.20 1.63 0.11
0.313 0.022 0.024 7.95 0.56 0.61 3.75 0.25 2.04 0.14
0.375 0.024 0.026 9.52 0.61 0.66 4.50 0.30 2.44 0.16
0.500 0.030 0.032 12.70 0.76 0.81 6.00 0.40 3.26 0.22
0.625 0.035 0.037 15.88 0.89 0.94 7.50 0.45 4.07 0.24
0.750 0.040 0.042 19.05 1.02 1.07 9.00 0.50 4.89 0.27
0.875 0.046 0.048 22.23 1.17 1.22 10.50 0.55 5.70 0.30
1.000 0.051 0.053 25.40 1.30 1.35 12.00 0.60 6.52 0.33
1.250 0.062 0.065 31.75 1.57 1.65 15.00 0.70 8.15 0.38
1.500 0.072 0.075 38.10 1.83 1.91 18.00 0.80 9.77 0.43
1.750 0.083 0.085 44.45 2.11 2.16 21.00 0.90 11.40 0.49
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D2475−22
TABLE1 Continued
2 2
Thickness, in. Thickness, mm Mass (Weight) lb/yd Mass (Weight) kg/m
ASTM (NTA)
Color Tolerances Tolerances
Class
Nominal Nominal Nominal Tolerances Nominal Tolerances
Sheets Cut Parts Sheets Cut Parts
2.000 0.094 0.098 50.80 2.39 2.49 24.00 1.00 13.03 0.54
2.500 0.115 0.119 63.50 2.92 3.02 30.00 1.05 16.29 0.57
3.000 0.136 0.141 76.20 3.45 3.58 36.00 1.10 19.55 0.60
34S1 White 0.125 0.012 0.014 3.17 0.30 0.36 2.00 0.10 1.09 0.05
34S2 White 0.188 0.012 0.014 4.78 0.30 0.36 3.00 0.15 1.63 0.08
34S3 White 0.250 0.016
...