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scrap metals

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Book Chapter

By John C. Bittence
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003222
EISBN: 978-1-62708-199-3
... Abstract This article focuses on the recycling of metals including iron and steel, stainless steel, superalloys, nickel, aluminum, copper, precious metals, lead, magnesium, tin, titanium, and zinc. It provides information on the identification and sorting of scrap metals and discusses the...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003804
EISBN: 978-1-62708-183-2
... further refined into steel by means of a basic oxygen furnace to reduce the carbon content to the appropriate level. Worldwide in 2003, 67% of steel was produced by this integrated process, and 33% came from remelting scrap steel in electric arc furnaces ( Ref 1 ). Worldwide production of steel products...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003150
EISBN: 978-1-62708-199-3
..., which is defined as metal discarded after use. New scrap, which is generated during manufacturing, is usually reclaimed by the fabricator and is not considered part of the market supply. The United States has appreciable gold resources, some of which are marginally profitable to recover. The price...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003834
EISBN: 978-1-62708-183-2
.... This material is corrosion resistant in the coinage environment and provides the properties required for coinage. In addition, recovery of scrap after coin stamping simply involves melting and reuse after adjusting the composition. Clad metals can be designed with a unique coefficient of linear...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006766
EISBN: 978-1-62708-295-2
... lubricants Rapid classification of scrap pieces for sorting Elemental analysis of geological materials ( Ref 1 ) In OES analysis, the specimen composition is determined from light emitted from atoms excited to a higher energy state. Free atoms, when placed in an energetic environment, emit light...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003171
EISBN: 978-1-62708-199-3
... sure that the depth of the pipe does not enter the casting, causing scrap. Another way to improve riser efficiency is to cover the top of the riser with insulating or exothermic materials. This cover is especially important in ferrous metals, which lose substantial amounts of heat by radiation to the...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.9781627081979
EISBN: 978-1-62708-197-9
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005307
EISBN: 978-1-62708-187-0
... additives in the melt. The ability to remelt zinc process scrap many times without losing properties is a significant advantage to the die caster. However, caution should be exercised to keep this material clean and free of unwanted substances. It should be stored separately away from other metals if it...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003141
EISBN: 978-1-62708-199-3
... Abstract Titanium metal passes through three major steps during processing from ore to finished product: reduction of titanium ore to sponge (porous form), melting of sponge and scrap to form ingot, and remelting and casting into finished shape. This article describes primary fabrication...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005301
EISBN: 978-1-62708-187-0
... alloys In most aluminum foundries, one-half to three-quarters of all scrap is caused by the undesirable formation of porosity or shrinkage or by problems directly related to these defects. Lack of pressure tightness, poor quality on machined surfaces, low elongation and loss of tensile strength...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005198
EISBN: 978-1-62708-187-0
... and careless charging with heavy and/or sharp ingot or scrap. It is important to keep in mind that hot crucibles filled with molten metal are fragile and therefore deserve careful handling. Care should be taken to set them on sand or other nonconductive surfaces. Placing a hot crucible full of...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006286
EISBN: 978-1-62708-169-6
... residual stress will cause distortion during the quenching or welding and subsequent machining processes. Due to the distortion, extra material usually is added to ensure dimensional compliance, or, in the worst case, if the distortion is too severe, cracks may occur and the part must be scrapped. The...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005931
EISBN: 978-1-62708-166-5
... program in a flexible manner, allowing steps to be controlled using the furnace control or work thermocouples. Flexibility in the event of a failed work thermocouple is a critical feature that could make the difference between a scrapped load and a successful run. Data recording rates and storage...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005195
EISBN: 978-1-62708-187-0
... ferrous scrap or molten bath. Over 80% of arc furnaces used for steel castings are alternating current furnaces with three electrodes. These electrodes strike an arc on the cold metal scrap or molten metal to impart energy to the bath and melt or superheat the furnace. Control of the electrode level above...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003223
EISBN: 978-1-62708-199-3
... manufacturing process. For example, the scrap value of turnings is low; that of punchings is high. The resale value of alternative metals/alloys for any particular process should also be considered. Once these values have been optimized, the value of the recycled scrap should be deducted from the cost of...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003050
EISBN: 978-1-62708-200-6
... as raw materials for other processes. This article describes the recycling of in-process scrap and industrial wastes (fly ash, red mud, metallurgical waste, and other waste products), and applications of these recycled products. It focuses on environmental regulations such as Resource Conservation...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005351
EISBN: 978-1-62708-187-0
.... Fig. 1 Effect of metal cleanliness on fluidity of an aluminum die casting alloy. Source: Ref 1 Thus, inclusion-related defects should be minimized to the greatest extent possible to prevent scrap castings, lost productivity, and lower profitability. This article describes the methods of in...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005224
EISBN: 978-1-62708-187-0
... thixotropic slurry is formed directly from the melt via special thermal treatment/management of the system; the slurry is subsequently fed into the die cavity. Of these two routes, rheocasting is favored in that there is no premium added to the billet cost, and the scrap recycling issues are alleviated...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005352
EISBN: 978-1-62708-187-0
... to the furnace charge chamber and an external refractory-lined charge well, where a unique internal bowl shape develops a vortex with, low-turbulence scrap submergence (LOTUSS™ Metaullics Systems) in the molten-metal stream. The vortex creates an ideal entry point for high-surface-area, low-density...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003173
EISBN: 978-1-62708-199-3
... electrode through the charge to the furnace bottom. Melting in a direct current furnace takes longer unless a heel of molten metal is left in the furnace. Fig. 8 Sectional view showing the basic components of a direct current arc furnace As in other melting methods, the scrap should be...