ASTM D5230-00

Standard Test Method for Carbon Black-Automated Individual Pellet Hardness

SCOPE
1.1 This test method covers a procedure for measuring the crush strength of individual pellets of carbon black by the automated pellet hardness tester.  
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-May-2000
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.51 - Carbon Black Pellet Properties

Relations

• Replaced By: ASTM D5230-00e1 - Standard Test Method for Carbon Black—Automated Individual Pellet Hardness
• Effective Date: 10-May-2000
• Referred By: ASTM D8466-22 - Standard Guide for Recovered Carbon Black—Carbon Black Test Methods for Testing rCB
• Effective Date: 10-May-2000
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 10-May-2000
• Referred By: ASTM D4122-17(2023) - Standard Practice for Carbon Black—Evaluation of an Industry Reference Black
• Effective Date: 10-May-2000
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 10-May-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 5230 – 00
Standard Test Method for
Carbon Black—Automated Individual Pellet Hardness
This standard is issued under the fixed designation D 5230; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope force measurement and 60.1 mm for the diameter measure-
ment and a relative accuracy of 60.5 cN (0.5 gf) for the force
1.1 This test method covers a procedure for measuring the
measurement and 0.02 mm for the diameter measurement and
crush strength of individual pellets of carbon black by the
consisting of the following major components and character-
automated pellet hardness tester.
istics.
1.2 The values stated in SI units are to be regarded as the
4.1.1 A means for automatic loading of a pellet on the
standard. The values in parentheses are for information only.
transport platen for transporting the pellet so as to contact the
1.3 This standard does not purport to address all of the
second platen with a minimum force. Typically one platen
safety concerns, if any, associated with its use. It is the
contains a force measuring device. The required force to detect
responsibility of the user of this standard to establish appro-
the contact shall not exceed 2 cN (2 gf),
priate safety and health practices and determine the applica-
4.1.2 A means for applying the force at a constant rate,
bility of regulatory limitations prior to use.
4.1.3 A means for transporting the pellet so to minimize its
2. Referenced Documents
movement during the application of force.
4.1.4 A means for measuring the diameter of the individual
2.1 ASTM Standards:
pellet under test as measured along the axis of the application
D 1511 Test Method for Carbon Black—Pellet Size Distri-
of force.
bution
4.1.5 A control device for directing the instrument through
D 1799 Practice for Carbon Black—Sampling Packaged
the test cycle that includes crushing the pellet under controlled
Shipments
conditions, measuring and storing the results of the initial
D 1900 Practice for Carbon Black—Sampling Bulk Ship-
diameter and crush force determinations, cleaning the frag-
ments
ments from the platen surfaces, and starting the next cycle.
D 4483 Practice for Determining Precision for Test Method
4.1.6 An algorithm for determining the individual test end
Standards in the Rubber and Carbon Black Industries
point (determination) as the maximum observed force prior to
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
the first occurrence of either a specified reduction in diameter
poses
or a specified reduction in force from the maximum force
3. Significance and Use
observed,
4.1.7 A program for calculating for a specified number of
3.1 Pellet crush strength is related to several carbon black
pellets the data as requested in Section 8, and
characteristics. Among these are mass strength and attrition.
4.1.8 A means for identifying, viewing, printing, and storing
The subsequent level of dispersion obtained in some mixed
the data in an ASCII file.
compounds containing the carbon black may be affected by
4.2 Mechanical Sieve Shaker, conforming to Test Method
pellet crush strength. Acceptable pellet hardness must be
D 1511.
agreed to by the user and the producer.
4.3 Sieves, U.S. Standard No. 12 (1700 μm) and No. 14
4. Apparatus
(1400 μm) conforming to E-11 shall be used to test grades of
black that can be segregated in a -12/+14 fraction. For grades
4.1 Automated Pellet Hardness Tester, capable of achiev-
of black that are too small to be retained on a No. 14 sieve, i.e.,
ing an absolute measuring accuracy of 62 cN (2 gf) for the
acetylene and thermal blacks, it is acceptable to test with U.S.
Standard No. 16 (1180 μm) and No. 18 (1000 μm) sieves.
This test method is under the jurisdiction of ASTM Committee D24 on Carbon
Black and is the direct responsibility of Subcommittee D24.51 on Carbon Black 4.4 Sieves, U.S. standard, or equivalent, conforming to
Pellet Properties.
Specification E 11. Sieve Nos. 12 (1700 μm) and 14 (1400 μm)
Current edition approved May 10, 2000. Published July 2000. Originally
shall be used.
published as D 5230 – 92. Last previous edition D 5230 – 99b.
The Concarb Titan Automated Pellet Hardness Tester is available from Titan
NOTE 1—Pellet size to be tested is 12/14 by program default. Another
Specialties, Inc., P.O. Box 2316, Pampa, TX 79065. The HITEC IPHT is available
size may be selected if desired by pressing menu item “6”.
from HITEC Luxembourg, 5 rue de L’ Eglise, L-1458, Luxembourg.
Annual Book of ASTM Standards, Vol 09.01.
4.5 Bottom-Receiver Pan and Top-Sieve Cover.
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 5230
4.6 Special Pellet Selection Tray, (shallow container), flat 8.1.1 Proper identification of the sample,
and approximately 300 mm (12 in.) long. 8.1.2 Average value in centinewtons (gram force) rounded
to the nearest millinewton (nearest 0.1 gram force),
5. Sampling
8.1.3 Maximum value in centinewtons (gram force)
5.1 Take samples in accordance with Practice D 1799 or rounded to a whole number
Practice D 1900.
8.1.4 As an option, the average of the highest 10 % of the
individual test values in centinewtons (grams force) rounded to
6. Calibration
a whole number,
6.1 Calibrate force and diameter measurement following the
8.1.5 Number of pellets tested, and
manufacturer’s instructions.
8.1.6 Size of sieves used to prepare the sample.
6.2 Instrument parameters:
9. Precision and Bias
6.2.1 Crush diameter, 0.90. A reduction of the pellet diam-
eter to 90 % of the original value is one of two end point
9.1 These precision statements have been prepared in ac-
criteria.
cordance with Practice D 4483. Refer to this practice for
6.2.2 Force drop. A decrease of 3 cN (3gf) from the
terminology and other statistical details.
maximum force observed is one of two end point criteria.
9.2 The precision results in this precision and bias section
6.2.3 Rate of piston movement during crush, 0.125 mm/s
give an estimate of the precision of this test method with the
6.2.4 Number of pellets tested; normal applications, 20
materials used in the particular interlaboratory program de-
pellets, critical applications, 50 pellets. Critical applications are
scribed below. The precision
...