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hot mill defects

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Published: 01 June 2019
, caused by rubbing during coiling. Such damage is not possible during transport; (b and c) serrated edges on hot rolled steel coil. This condition is a natural result of hot rolling, but it should be trimmed away at the steel mill prior to shipping. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001608
EISBN: 978-1-62708-236-5
... the purchasing specifications and observations and photographs taken during surveys enroute. A frequent conclusion of such investigations is that the alleged corrosion is of no significance or did not occur during the voyage. Mill scale Rusting Storage Hot-rolled steel Uniform corrosion Hot Rolled...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
.... discontinuities hot forming ingot casting metalworking defects nonferrous forging steel forging wrought metal products Introduction to Failures Related to Hot Forming Processes Wrought forms are produced by a wide variety of metalworking operations that can be roughly divided into bulk-working...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001836
EISBN: 978-1-62708-241-9
... Abstract An investigation was conducted to determine why 16 out of 139 pipe bends cracked during hot induction bending. The pipe conformed to API 5L X65 PSL2 line pipe standards and measured 1016 mm (40 in.) in diam with a wall thickness of 18.5 mm. A metallurgical cross section was removed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... operations are also classified as either primary metalworking (where mill forms such as bar, plate, tube, sheet, and wire are worked from ingot or other cast forms) or secondary metalworking (where mill products are further formed into finished products by hot forging, cold forging, drawing, extrusion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001641
EISBN: 978-1-62708-235-8
... voids with long empty tubes develop when the die design allows hot spots to develop and remain in the casting during the solidification cycle. The funnel shape is similar to the “pipe” features created during solidification of large ingots in steel mills. If the funnel intersected the casting surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001632
EISBN: 978-1-62708-234-1
... cells at the LANL CMR building are equipped with an in-cell milling machine, a band saw, optical microscopes, microhardness tester, tensile testing machine, sample polishing equipment, sample etching equipment, and a variety of specialized hardware for handling complex components. The hot cells date...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
...) tensile strength and a 241-MPa (35-ksi) yield strength. The steel mill tests showed a Charpy V-notch energy absorption of 30 J (22 ft · lb) at 20 °C (68 °F). The plates had been hot formed into segments during construction of the reactor. The inside of the vessel was refractory lined to keep its...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001601
EISBN: 978-1-62708-235-8
..., it is not practical to hot extrude thin wall tubes beyond a specified limit. Drawing is an easier and less expensive process than extrusion; therefore, a thick wall tube is cold extruded and finished on a draw bench or pilger mill. The drawing process is essentially a tensile process. Microcracks and other defects...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
... alterations associated with metal-removal practices Energy mode Undesirable altered surface Mechanical Plastic deformations (as result of hot or cold working) Tears, laps, and crevicelike defects (associated with built-up edge produced in machining) Hardness alterations Cracks...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001839
EISBN: 978-1-62708-241-9
... intervention to prevent its recurrence in low nickel stainless steel hot rolled coils. Experimental Procedure The chemical composition of the steel samples was analyzed using an optical emission spectrometer (OES), ARL Model 3460. The hydrogen content of the defective coil samples was measured through...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... surface D 141 Casting surface depressions in the vicinity of a hot spot Sink marks, draw or such-in D 142 Small, superficial cavities in the form of droplets of shallow spots, generally gray-green in color Slag inclusions D 200 Serious surface defects D 210 Deep indentation...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006836
EISBN: 978-1-62708-329-4
... is comprised of (a) aluminum and (b) magnesium. Scan was taken from the image in Fig. 2(b) Example 3: Preexisting Hot Mill Rolling Crack Figure 4 shows a surface flaw deep enough to cause a coil spring to fail early; this surface imperfection was inherited from the raw material ( Ref 5...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
... will be presented in the section “Causes of Service Failures” in this article because this is the leading cause of service failures. Material Defects Material defects may be laminations, laps, seams, holes, hot tears, and so on. A few failures have resulted from foreign material being rolled into the pipe...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... that coating erosion in conjunction with severe hot-corrosion was responsible for crack initiation in the leading edge area. Coating erosion Marine engines Turbine blades Turbine vanes MAR-M302 Inconel 713C High-temperature corrosion and oxidation Fatigue fracture Introduction...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
..., and so on) and machining processes (drilling, turning, milling, and so on). Second, tools and dies are generally used at higher hardnesses than most other steel products; 58 to 68 HRC is a typical range. Dies for plastic molding or hot working are usually used at lower hardnesses, typically from 30 to 55...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
... on) and machining processes (drilling, turning, milling, and so on). Second, tools and dies are generally used at higher hardnesses than most other steel products; 58 to 68 HRC is a typical range. Dies for plastic molding or hot working are usually used at lower hardnesses, typically from 30 to 55 HRC...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001768
EISBN: 978-1-62708-241-9
... cycling high-strength low-alloy steel cracking Charpy impact tests impact toughness ASTM A572 grade 50 (columbium-vanadium steel) Introduction Splice plates used in power transmission line towers are usually galvanized steel angles made of hot-rolled structural steels [ 1 ]. Several holes...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001817
EISBN: 978-1-62708-180-1
.... Effects of Inspection Procedures All heat-exchanger tubes purchased to ASTM specifications are hydrostatically tested at the mill; the purchaser sometimes specifies that a nondestructive test also be used. Hydrostatic testing is also performed after the heat exchanger has been fabricated. One...