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Brinell hardness

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Published: 30 August 2021
Fig. 31 Surface finish modification factor vs. tensile strength or Brinell hardness for different surface finishes. Adapted from Ref 90 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001462
EISBN: 978-1-62708-224-2
... at the mid-length of the sides. Brinell hardness values confirmed that the link was made from the higher tensile grade of material. The cracks were due to fatigue, there being no indications that the weld was initially defective. Butt welds Chains Steel chain Fatigue fracture The following case...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048052
EISBN: 978-1-62708-224-2
.... The chains were retempered to a hardness of 302 to 375 HRB as a corrective measure and subsequently ordered chains had this hardness as a requirement. Brinell hardness Cranes Notch sensitivity Alloy steel Brittle fracture Over a 1-year period, chain-link fractures occurred in many of several...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0048077
EISBN: 978-1-62708-221-1
... and tempered to a hardness of 302 to 352 HRB and all machining discontinuities were removed. Brinell hardness Fatigue strength Magnetic particle testing Radii 1040 UNS G10400 Fatigue fracture The 14-cm (5 1 2 -in.) diam main hoist shaft of a mobile shovel was found to have multiple...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0047406
EISBN: 978-1-62708-232-7
... was revised to eliminate all tool marks. Surface hardening was applied to all tooth surfaces, including the root. Proper alignment of the pinion was ensured by carefully checking the meshing of the teeth at startup. Alignment Brinell hardness Gear teeth Stress concentration Fe-0.32C-1.57Cr-0.37Mo...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
...</xref>, <xref rid="c9001760-ref3" ref-type="bibr">3]</xref> Brinell hardness tests with 250 Kg force and a steel indentor with 5-mm diameter were performed with 15 s interval on the specimen surface. The locations are shown in Figs. 8 and 9 , and the results are listed in Table 3 . It should be mentioned that the average hardness...
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.conag.c9001198
EISBN: 978-1-62708-221-1
... at a comparatively high temperature for stress relief. The core structure of the caps consisted of graphite in pearlitic-ferritic matrix ( Figs. 6 and 7 ). The average Brinell hardness was 160 kgf/mm 2 , from which a low strength could be inferred. Fig. 2 Section through groove parallel to fracture, etch...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001134
EISBN: 978-1-62708-214-3
... in.). An estimated conversion to Brinell hardness suggested that the material was harder than the value recommended for safety (302 to 352 HB). Microhardness values <xref rid="c9001134-tn1" ref-type="table-fn">(a)</xref> Table 1 Microhardness values (a) Distance from edge Knoop hardness Brinell...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048164
EISBN: 978-1-62708-217-4
.... Brinelling Loads (forces) Support 6150 UNS G61500 Brittle fracture Fatigue fracture A flat spring for the main landing gear of a light aircraft broke after safe execution of a hard landing. The spring ( Fig. 1a ) was submitted for laboratory examination. No information was furnished concerning...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001018
EISBN: 978-1-62708-217-4
... Abstract Initial investigation showed that a landing gear failure was the result of a hard landing with no evidence of contributory factors. The objective of reexamination was to determine whether there was any evidence of metallurgical failure. The landing gear was primarily an AISI type 6150...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001188
EISBN: 978-1-62708-235-8
... crystalline final break (left bottom). Fig. 1 Fracture. Approx. 0.5× Chemical analysis showed that the steel composition corresponded to the Ck 35 specification according to DIN 17200. On the basis of the Brinell Hardness, found to be 153 to 154 kg/mm 2 , the strength requirement of the standard...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0001784
EISBN: 978-1-62708-218-1
... in.) radius shown in Fig. 1 . The lever is pivoted in a ball socket, and the maximum load transmitted at end A is 1.8 kN (400 lbf). The steel is 1049 hardened to 269 to 285 HB, with properties as given in Table 1 . Fatigue strength of heat-treated wrought steel of various Brinell hardness ranges...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001449
EISBN: 978-1-62708-221-1
... of the plate had served as the point of initiation. The fracture surface was bounded by narrow lips, indicative of shear failure. The welds were not of a pronounced convex form, nor was severe undercutting present. The Brinell hardness of the material was 118, indicating an ultimate tensile strength...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0089696
EISBN: 978-1-62708-220-4
... that the foundry used before shipping the castings consisted of casting, normalizing, preheating plus weld repair, normalizing, quenching and tempering, drawing to the required Brinell hardness, and nondestructive testing (dry magnetic particle). The crossheads were subsequently machined in-house by the customer...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001468
EISBN: 978-1-62708-221-1
... in the photograph. A specimen for microscopical examination was taken from the origin of the major crack—marked A in the illustration. The material was a mild steel in the normalised or annealed condition, having a carbon content of approximately 0.3%. Brinell hardness tests gave values of 174–179, indicative...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001416
EISBN: 978-1-62708-235-8
... contributed to the failure. The Brinell hardness of the material was 163, this being equivalent to a tensile strength of approximately 36 t.p.s.i. Following the second failure, the cylinder of the third machine was examined by ultrasonic means, a crack being found in the course of development at the identical...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001089
EISBN: 978-1-62708-214-3
... steel casting was specified. The manufacturing sequence that the foundry used before shipping the castings consisted of casting, normalizing, preheating plus weld repair, normalizing, quenching and tempering, drawing to the required Brinell hardness, and nondestructive testing (dry magnetic particle...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091640
EISBN: 978-1-62708-229-7
... in specimens that have been slowly (furnace) cooled through the range of 455 to 400 °C (850 to 750 °F) after aging. Brinell hardness readings along the length of the stem indicated a uniform hardness throughout. Hardness readings taken from a cross section of the stem 19 mm ( 3 4 in.) from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001461
EISBN: 978-1-62708-224-2
... and macro-etched without revealing any untoward features. Microscopical examination showed that the material was a low carbon steel in the normalised condition; no abnormal features were observed. The Brinell hardness number of 123 indicated an ultimate tensile strength of the order of 28 t.p.s.i...