Name: ASTM D 2260 : 2003 : R2013
Brand: ASTM
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Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems

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Superseded date

12-09-2024

Superseded by

ASTM D 2260 : 2003 : R2018

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English

Published date

01-07-2013

Publisher

American Society for Testing and Materials

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CONTAINED IN VOL. 07.01, 2014 Consists 1) a series of conversion factors required to convert the number of a yarn measured in a specific system to the equivalent number measured in various other systems, and 2) specific equivalent numbers for yarns measured in various systems.

Committee	D 13
DocumentType	Standard
Pages	12
ProductNote	Reconfirmed 2013
PublisherName	American Society for Testing and Materials
Status	Superseded
SupersededBy	ASTM D 2260 : 2003 : R2018
Supersedes	ASTM D 2260 : 2003 : R2009

1.1These tables include (1) a series of conversion factors required to convert the number of a yarn measured in a specific system to the equivalent number measured in various other systems (see Table 1), and (2) specific equivalent numbers for yarns measured in various systems (see Table 2).

TABLE 1 Conversion Factors for Converting from One Yarn Numbering System to Another^A

System for Which Yarn Number is Needed	System for Which Yarn Number is Known
System for Which Yarn Number is Needed	Tex^B		Denier	American Grain Count	Cotton Count	Worsted Count	Woolen Run	Metric Count	Linen Lea Woolen Cut	Yd/lb
Tex^B (g/1000 m)	tex =	...		0.590541 × gr
Denier (g/9000 m)	den =	9 × tex	...	5.31487 × gr
American Grain Count (grains/120 yd)	gr =			...
Cotton count (840 yd lengths/lb)	cc =				...			0.590541 × mc
Worsted count (560 yd lengths/lb)	wc =				1.5 × cc	...		0.885812 ×mc
Woolen run (1600 yd lengths/lb)	wr =				0.525 × cc	0.35 × wc	...	0.310034 × mc	0.1875 ×lea
Metric count (1000 m/kg)	mc =							...
Linen lea (300 yd lengths/lb)	lea =				2.8 × cc	1.86667 × wc	0.1875 × wr	1.65352 × mc	...
Yards per pound (yd/lb)	y =				840 × cc	560 × wc	1600 × wr	496.055 × mc	300 × lea	...

^A The conversion factors are based on the following relationships given in Metric Practice SI 10 SI10: 1 yard = 0.9144 m, exactly, and 1 lb (avoirdupois) = 0.45359237 kg, exactly. The conversion factors in Table 1 containing fewer than six significant digits are exact values.

^B Multiples and submultiples of this basic unit may be used as a convenience to avoid large numbers or decimal fractions. For example, decitex (dtex) or tex × 10 is suitable for fine yarns and fibers; millitex (mtex) or tex × 1000 is suitable for fibers; while kilotex (ktex) or tex/1000 is often used for ropes, cords, rovings, tops, and slivers.

Examples of Table 1 use:

1)The English worsted count equivalent to a cotton count of 10 is 1.5 times 10, or 15 English worsted count.

2)The cotton count equivalent to 30 tex is 590.54 divided by 30, or 19.7 cotton count.

1.2The content is basically consistent with recommendations of the International Organization for Standardization (ISO) Standard 2947 .

1.3The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4This 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.

ASTM D 375/D375M : 1995 : R2017	Standard Specification for Asbestos Roving (Withdrawn 2022)
ASTM D 4849 : 2013 : R2018	Standard Terminology Related to Yarns and Fibers
ASTM D 299/D299M : 2004 : R2017	Standard Specification for Asbestos Yarns (Withdrawn 2022)

ISO 2947:1973	Textiles — Integrated conversion table for replacing traditional yarn numbers by rounded values in the Tex System
IEEE/ASTM SI_10-2010	American National Standard for Metric Practice

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ASTM D 2260 : 2003 : R2013

Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems

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