ASTM D5230-03

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.²
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-Jul-2003
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.51 - Carbon Black Pellet Properties

Relations

• Replaces: ASTM D5230-00e2 - Standard Test Method for Carbon Black—Automated Individual Pellet Hardness
• Effective Date: 10-Jul-2003
• Replaced By: ASTM D5230-04 - Standard Test Method for Carbon Black—Automated Individual Pellet Hardness
• Effective Date: 01-Jan-2004
• Referred By: ASTM D4122-17(2023) - Standard Practice for Carbon Black—Evaluation of an Industry Reference Black
• Effective Date: 10-Jul-2003
• Referred By: ASTM D8466-22 - Standard Guide for Recovered Carbon Black—Carbon Black Test Methods for Testing rCB
• Effective Date: 10-Jul-2003
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 10-Jul-2003
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 10-Jul-2003

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 5230 – 03
Standard Test Method for
1
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 required to reduce the pellet diameter to 90 % of the original
height or a reduction of the maximum force by 3 cN.
1.1 This test method covers a procedure for measuring
individual pellet hardness of carbon black by the automated
4. Significance and Use
2
pellet hardness tester.
4.1 Individual pellet hardness is related to several carbon
1.2 The values stated in SI units are to be regarded as the
black characteristics. Among these are mass strength and
standard. The values in parentheses are for information only.
attrition. The subsequent level of dispersion obtained in some
1.3 This standard does not purport to address all of the
mixed compounds containing the carbon black may be affected
safety concerns, if any, associated with its use. It is the
by pellet hardness. Acceptable pellet hardness must be agreed
responsibility of the user of this standard to establish appro-
to by the user and the producer.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Apparatus
2
2. Referenced Documents 5.1 Automated Pellet Hardness Tester, capable of achiev-
ing an absolute measuring accuracy of 62 cN (2 gf) for the
2.1 ASTM Standards:
force measurement and 60.1 mm for the diameter measure-
D 1511 Test Method for Carbon Black—Pellet Size Distri-
3 ment and a relative accuracy of 60.5 cN (0.5 gf) for the force
bution
measurement and 0.02 mm for the diameter measurement and
D 1799 Practice for Carbon Black—Sampling Packaged
3 consisting of the following major components and character-
Shipments
istics.
D 1900 Practice for Carbon Black—Sampling Bulk Ship-
3 5.1.1 A means for automatic loading of a pellet on the
ments
transport platen for transporting the pellet so as to contact the
D 4483 Practice for Determining Precision for Test Method
3 second platen with a minimum force. Typically one platen
Standards in the Rubber and Carbon Black Industries
contains a force measuring device. The required force to detect
E 11 Specification for Wire Cloth and Sieves for Testing
4 the contact shall not exceed 2 cN (2 gf),
Purposes
5.1.2 A means for applying the force at a constant rate,
3. Summary of Test Method— 5.1.3 A means for transporting the pellet so to minimize its
movement during the application of force.
3.1 A sample of carbon black is passed through two sieves
5.1.4 A means for measuring the diameter of the individual
to isolate a fraction of uniform size. The most spherical pellets
pellet under test as measured along the axis of the application
from this portion are selected and placed into the tester. The
of force.
individual pellets are pressed against a platen with a load cell
5.1.5 A control device for directing the instrument through
for measuring force. The individual pellet hardness is the force
the test cycle that includes crushing the pellet under controlled
conditions, measuring and storing the results of the initial
1
diameter and crush force determinations, cleaning the frag-
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 ments from the platen surfaces, and starting the next cycle.
Pellet Properties.
5.1.6 An algorithm for determining the individual test end
Current edition approved July 10, 2003. Published August 2003. Originally
point (determination) as the maximum observed force prior to
e1
approved in 1992. Last previous edition approved in 2000 as D 5230 – 00 .
2
the first occurrence of either a specified reduction in diameter
The Concarb Titan Automated Pellet Hardness Tester is available from Titan
Specialties, Inc., P.O. Box 2316, Pampa, TX 79065, E-mail:
or a specified reduction in force from the maximum force
[e-mail]. The HITEC IPHT is available from HITEC Luxem-
observed,
bourg, 5 rue de L’ Eglise, L-1458, Luxembourg, E-mail: [e-mail].
3 5.1.7 A program for calculating for a specified number of
Annual Book of ASTM Standards, Vol 09.01.
4
Annual Book of ASTM Standards, Vol 14.02. pellets the data as requested in Section 9, and
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