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Rockwell hardness

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Published: 01 December 2019
Fig. 8 Long-life fatigue strength as a function of Rockwell hardness for selected low-alloy steels More
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Published: 15 May 2022
Fig. 20 Rockwell hardness of engineering plastics. PET, polyethylene terephthalate; PA, polyamide; PPO, polyphenylene oxide; PBT, polybutylene terephthalate; PC, polycarbonate; ABS, acrylonitrile-butadiene-styrene More
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Published: 01 June 2019
Fig. 2 Rockwell “B” hardness profiles for two ring sections. More
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Published: 01 June 2019
Fig. 5 Map of hardness of outside surface of piece 5-1-D, compiled from hardness measurements using Rockwell hardness tests (subsequently, converted to Knoop hardness) and Knoop hardness measurements. More
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Published: 15 January 2021
Fig. 39 (a) Ti-6Al-4V fastener with grinding burn on the bearing surface. Material has been re-solution treated. 2% HF etch. (b) Ground surface of 5160H steel spring caused as-quenched martensite with 67 HRC Rockwell hardness, while base is 51 HRC. Nital etch More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
... but is generally used as a pass/fail evaluation Hardness testing Macroindentation hardness testing Rockwell hardness Hardness Need smooth surface finish, flat surface, and parallel sides Sample must fit within the machine and be balanced on the pedestal Brinell hardness Hardness Need smooth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047840
EISBN: 978-1-62708-223-5
.... As a corrective measure, the hole through the square end of the mandrel was incorporated into the design of the tool and was drilled and reamed before heat treatment and specified hardness of the threaded portion and square end of the mandrel was reduced. Drilling Electric discharge machining Rockwell...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001784
EISBN: 978-1-62708-241-9
...% Nital) Rockwell Hardness Rockwell hardness test using B scale (HRB) was used to measure hardness of the failed wrench socket and two of its counterparts. Hardness tester was calibrated for B scale prior to hardness measurements. Table 1 shows hardness test results of all three wrench socket...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047991
EISBN: 978-1-62708-225-9
... races Radar equipment Rockwell hardness 4140 UNS G41400 Heat treating-related failures A large bearing from a radar antenna was replaced because of deformation, surface cracking, and spalling on the raceway of the outer ring. Figure 1(a) shows a sectional view of the bearing. Fig. 1...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001043
EISBN: 978-1-62708-214-3
... analysis resembled the specification for type D2 tool steel rather than for an austenitic stainless steel, thus explaining its extremely brittle nature. Mechanical Properties Hardness Hardness tests of the surface and of a micromounted cross section were conducted with a Rockwell hardness tester...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089459
EISBN: 978-1-62708-235-8
... failed rods, no significant imperfections or evidence of damage were found by visual examination. Surface hardness of the four rods, as measured at various points with a Rockwell tester, was equivalent to 140 HB— substantially lower than the specified hardness of 160 to 205 HB. The fractures...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001759
EISBN: 978-1-62708-241-9
... on a Rockwell hardness tester with 150 kg load using a diamond indenter. The following readings were taken for the sample: Surface hardness: 62 HRC (specification: 58–64 HRC) Core hardness: 42 RC (specification: 30 HRC max) The hardness measurement of the specimen was done on a straight line from...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001785
EISBN: 978-1-62708-241-9
... Failed section of the wrench Chemical composition and hardness measurements were also performed on the failed wrench. The chemical composition was obtained using an optical emission spectrometer, and the results are as shown in Table 1 . Hardness measurements were performed using a Rockwell...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
... confirmed intergranular corrosion and cracking in the type 430 weld metal and in the HAZ on the tube side of the joint ( Fig. 7 , 8 ). Corrosion proceeded preferentially at the lower-Cr-content martensitic phase that formed preferentially along the grain boundaries. The Rockwell hardness values shown...
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Published: 15 January 2021
Fig. 25 Plot of hardness across the carburized layer of a gear tooth made by using a microindentation hardness tester with a Vickers indenter. The equivalent Rockwell C hardness is shown on the right. The effective depth of hardness is indicated by the broken line cutting the hardness plot More
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Published: 01 January 2002
Fig. 25 Plot of hardness across the carburized layer of a gear tooth made by using a micro-indentation hardness tester with a Vickers indenter. The equivalent Rockwell C hardness is shown on the right. The effective depth of hardness is indicated by the broken line cutting the hardness plot More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001101
EISBN: 978-1-62708-214-3
... Superficial Rockwell hardness measurements were taken on the metallographic section. The average hardness for the failed cap screw was 80.5 HRN, which converts to approximately 40 HRC. Discussion The presence of a ductile fracture mode at the core and an intergranular fracture mode at the outer surface...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001116
EISBN: 978-1-62708-214-3
... in the ERW zones of both samples. In the hard-appearing microstructure in sample 1, the hardness ranged from 258 to 390 HV. In the ferrite and ferrite/carbide bands, the hardness ranged from 162 to 227 HV. When measured with a bench-type Rockwell hardness tester, the bulk hardness of the tube, including...
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Published: 01 January 2002
Fig. 15 Appearance of hydrogen-stress cracks in line pipe. (a) Fracture surface. 0.5×. (b) Results of Rockwell C hardness traverse of pipe More