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ASTM G77-05

(Test Method)

Standard Test Method for Ranking Resistance of Materials to Sliding Wear Using Block-on-Ring Wear Test

Standard Test Method for Ranking Resistance of Materials to Sliding Wear Using Block-on-Ring Wear Test

SCOPE
1.1 This test method covers laboratory procedures for determining the resistance of materials to sliding wear. The test utilizes a block-on-ring friction and wear testing machine to rank pairs of materials according to their sliding wear characteristics under various conditions.
1.2 An important attribute of this test is that it is very flexible. Any material that can be fabricated into, or applied to, blocks and rings can be tested. However, the interlaboratory testing has been limited to metals. Thus, the potential materials combinations are endless. In addition, the test can be run with various lubricants, liquids, or gaseous atmospheres, as desired, to simulate service conditions. Rotational speed and load can also be varied to better correspond to service requirements.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. Wear test results are reported as the volume loss in cubic millimetres for both the block and ring. Materials of higher wear resistance will have lower volume loss.
1.4 This standard does not purport to address 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
30-Apr-2005
ICS
19.060 - Mechanical testing
77.040.10 - Mechanical testing of metals
Technical Committee
G02 - Wear and Erosion
Drafting Committee
G02.40 - Non-Abrasive Wear
Current Stage
Ref Project

Relations

Replaces
ASTM G77-98 - Standard Test Method for Ranking Resistance of Materials to Sliding Wear Using Block-on-Ring Wear Test
Effective Date
01-May-2005
Replaced By
ASTM G77-05e1 - Standard Test Method for Ranking Resistance of Materials to Sliding Wear Using Block-on-Ring Wear Test
Effective Date
01-May-2005
Referred By
ASTM G115-10(2018) - Standard Guide for Measuring and Reporting Friction Coefficients
Effective Date
01-May-2005
Referred By
ASTM G137-97(2017) - Standard Test Method for Ranking Resistance of Plastic Materials to Sliding Wear Using a Block-On-Ring Configuration
Effective Date
01-May-2005
Referred By
ASTM G176-03(2017) - Standard Test Method for Ranking Resistance of Plastics to Sliding Wear Using Block-on-Ring Wear Test—Cumulative Wear Method
Effective Date
01-May-2005

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ASTM G77-05 - Standard Test Method for Ranking Resistance of Materials to Sliding Wear Using Block-on-Ring Wear TestASTM G77-05 - Standard Test Method for Ranking Resistance of Materials to Sliding Wear Using Block-on-Ring Wear Test
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ASTM G77-05 - Standard Test Method for Ranking Resistance of Materials to Sliding Wear Using Block-on-Ring Wear Test
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:G77–05
Standard Test Method for
Ranking Resistance of Materials to Sliding Wear Using
1
Block-on-Ring Wear Test
ThisstandardisissuedunderthefixeddesignationG77;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This test method covers laboratory procedures for de-
G40 Terminology Relating to Wear and Erosion
termining the resistance of materials to sliding wear. The test
utilizes a block-on-ring friction and wear testing machine to
3. Terminology
rank pairs of materials according to their sliding wear charac-
3.1 Definition:
teristics under various conditions.
3.1.1 wear—damage to a solid surface, generally involving
1.2 An important attribute of this test is that it is very
progressive loss of material, due to relative motion between
flexible.Anymaterialthatcanbefabricatedinto,orappliedto,
that surface and a contacting substance or substances.
blocks and rings can be tested. However, the interlaboratory
3.1.2 Foradditionaldefinitionspertinenttothistestmethod,
testinghasbeenlimitedtometals.Thus,thepotentialmaterials
see TerminologyG40.
combinations are endless. In addition, the test can be run with
various lubricants, liquids, or gaseous atmospheres, as desired,
4. Summary of Test Method
to simulate service conditions. Rotational speed and load can
4.1 Atest block is loaded against a test ring that rotates at a
also be varied to better correspond to service requirements.
given speed for a given number of revolutions. Block scar
1.3 The values stated in SI units are to be regarded as the
volume is calculated from the block scar width, and ring scar
standard. The values given in parentheses are for information
volume is calculated from ring weight loss. The friction force
only.Wear test results are reported as the volume loss in cubic
required to keep the block in place is continuously measured
millimetres for both the block and ring. Materials of higher
during the test with a load cell. These data, combined with
wear resistance will have lower volume loss.
normal force data, are converted to coefficient of friction
1.4 This standard does not purport to address the safety
values and reported.
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
5. Significance and Use
health practices and determine the applicability of regulatory
5.1 The significance of this test method in any overall
limitations prior to use.
measurement program directed toward a service application
will depend on the relative match of test conditions to the
2. Referenced Documents
2 conditions of the service application.
2.1 ASTM Standards:
5.2 This test method seeks only to prescribe the general test
D2714 Test Method for Calibration and Operation of the
procedure and method of calculating and reporting data. The
Falex Block-on-Ring Friction and Wear Testing Machine
choice of test operating parameters is left to the user. A fixed
E122 Practice for Calculating Sample Size to Estimate,
amount of sliding distance must be used because wear is
Within a Tolerable Specified Error, The Average for
usually non-linear with distance in this test.
Characteristic of a Lot or Process
E177 Practice for Use of the Terms Precision and Bias in
6. Apparatus and Materials
ASTM Test Methods
6.1 Test Schematic—Aschematic of one possible block-on-
3
ring wear test geometry is shown in Fig. 1. In the figure, the
friction sensor is enlarged.
1
This test method is under the jurisdiction of ASTM Committee G02 on Wear
6.2 Test Ring—A typical test ring is shown in Fig. 2. The
andErosionandisthedirectresponsibilityofSubcomitteeG02.40onNon-Abrasive
test ring must have an outer diameter of 34.99 6 0.025 mm
Wear.
Current edition approved May 1, 2005. Published May 2005. Originally
approved in 1983. Last previous edition approved in 1998 as G77–98.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Several machines have been found satisfactory for the purposes of this test.
Standards volume information, refer to the standard’s Document Summary page on These models may differ in lever arm ratio, load range, speed control (variable or
the ASTM website. fixed), speed range, and type of friction measuring device.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
G77–05
9. Procedure
9.1 Clea
...

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