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beryllium grades

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Published: 01 July 2009
Fig. 4.3 Young’s modulus of various grades of beryllium as a function of temperature. a, pressure sintered; b, cast and cross rolled; c, cast and extruded; d, powder metallurgy and extruded; e, pressure sintered (1 wt% BeO). Source: Scaffidi-Argentina et al. 2000 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550193
EISBN: 978-1-62708-307-2
... the properties, compositions, and processing characteristics of beryllium and its alloys. It provides information on powder production and consolidation, commercial designations and grades, wrought products, and forming processes. It also discusses the issue of corrosion, the use of protective treatments...
Image
Published: 01 July 2009
Fig. 17.41 Fatigue crack growth rate for experimental grade C beryllium as a function of maximum applied stress-intensity factor, K fmx , at the crack tip for a range of specimen thicknesses. Solid line b is theoretical. Source: Auten and Hanafee 1976 More
Image
Published: 01 July 2009
Fig. 17.67 Shear stress versus shear strain at outer radius for SR-grade beryllium tested at a strain rate of 3.5 × 10–5/s under three different (nearly hydrostatic) pressures. Source: Abey 1970 More
Image
Published: 01 July 2009
Fig. 17.68 Shear stress versus shear strain at outer radius for SR-grade beryllium tested at a strain rate of 3.6 × 10 –3 /s under three different (nearly hydrostatic) pressures. Source: Abey 1970 More
Image
Published: 01 July 2009
Fig. 17.69 Shear stress versus shear strain at outer radius for SR-grade beryllium tested at a strain rate of 3.7 × 10 –1 /s under three different (nearly hydrostatic) pressures. Source: Abey 1970 More
Image
Published: 01 July 2009
Fig. 25.16 Scanning electron micrograph of corrosion pits in S-200D-grade beryllium. Source: Lillard 2001 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240597
EISBN: 978-1-62708-251-8
... to a bcc phase at 1270 °C (2318 °F), only 13 °C (23 °F) below its melting point. The properties of a number of pure commercial grades are given in Table 32.1 . Commercially available grades of pure beryllium are distinguished by impurity levels and BeO content. The metal normally contains 0.7 to 4.25...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230209
EISBN: 978-1-62708-298-3
... S-65C. Source: Goods and Dombrowski 1998 Fig. 17.5 Drop in ultimate tensile strength with increase in temperature for grade S-65C. Source: Goods and Dombrowski 1998 Tensile properties for vacuum hot-pressed grade S-65B beryllium Table 17.1 Tensile properties for vacuum hot...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230151
EISBN: 978-1-62708-298-3
... ductility of beryllium is further compromised. The flow stress of single-crystal beryllium as a function of temperature for various possible slip systems is given in Fig. 13.4 . The solid lines are for single-crystal properties, and the data points represent various grades of polycrystalline beryllium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230027
EISBN: 978-1-62708-298-3
... of beryllium Atomic number 4 Atomic radius, Å 1.125 Atomic volume, cm 3 /g · atom 4.96 Atomic weight, g 9.01218 Density—pure, g/cm 3 1.8477 Density—commercial grades, g/cm 3 1.82–1.85 Electronic structure 1s 2 2s 2 Crystal structure, < 1250 °C Hexagonal close-packed (α...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230267
EISBN: 978-1-62708-298-3
... distribution requires repeated classification and milling practices. Various processes are used to yield different grades of powders. Beryllium powder is consolidated using a selected powder grade and consolidation process, resulting in a compact. The powder composition and consolidation practice can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230065
EISBN: 978-1-62708-298-3
... Abstract This chapter describes some of the processes used to concentrate beryllium-rich minerals from ores. It discusses the flotation of bertrandite and phenacite from calcite, mica, fluorspar, and quartz-containing ores, the flotation of beryl from pegmatitic gangues and low-grade deposits...
Image
Published: 01 July 2009
Fig. 17.42 Effect of specimen thickness on mean crack growth rate in five experimental grades of beryllium. Δ, grade A; ♦, grade B; □, grade C; ○, grade D; ▿, Grade E. Filled and empty symbols represent transverse and perpendicular directions to the pressing direction, respectively. Source More
Image
Published: 01 July 2009
Fig. 17.11 Elongation of hot-pressed blocks as a function of temperature comparing grade S-200F (broken line) with grade S-200E (dot-dash line) beryllium in longitudinal direction. Elongation of grade S-200F transverse (solid line) also given. Source: Haws 1985 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230019
EISBN: 978-1-62708-298-3
... consumer, the United States, was nil. The rhyolitic tuffs in the Utah source contain 0.1 to 1.0 wt% BeO. The current lower practical limit is an average 0.65 wt% BeO content of the ore input to processing. Although the ore grade is much lower than that of beryl ore, the beryllium content...
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Published: 01 July 2009
Fig. 17.9 Tensile yield strength of hot-pressed blocks as a function of temperature, comparing grade S-200F with grade S-200E beryllium in transverse and longitudinal directions. Source: Haws 1985 More
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Published: 01 July 2009
Fig. 17.10 Ultimate tensile strength of hot-pressed blocks as a function of temperature, comparing grade S-200F with grade S-200E beryllium in transverse and longitudinal directions. Source: Haws 1985 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230295
EISBN: 978-1-62708-298-3
... in a lathe with a multihead cutting tool, cleaned, and reduced to the powders used in the consolidation processes [ Marder et al. 1990 ]. Chemical compositions of two common grades of powders are given in Table 20.1 [ Marder 1998a ]. Nominal compositions of nuclear and structural grades of beryllium...
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Published: 01 July 2009
Fig. 4.29 Thermal diffusivity of normal-purity block and instrument-grade block of beryllium. Source: Pinto 1979b More