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Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003101
EISBN: 978-1-62708-199-3
... structural steels capable of a minimum yield strength of 1380 MPa (200 ksi). These include medium-carbon low-alloy steels, such as 4340, 300M, D-6a and D-6ac steels; medium-alloy air-hardening steels, such as HI1 modified steel and H13 steel; high fracture toughness steels, such as HP-9-4-30, AF1410...
Image
Published: 01 January 1989
Fig. 4 Effect of heat in electrical discharge grinding on the surface hardness of various work metals. (a) 4340 steel, 50 HRC. (b) D-6ac steel, 50 HRC. (c) Grade 250 maraging steel, 50 HRC. (d) Ti-8Al-1Mo-1V, 50 HRC More
Image
Published: 01 December 1998
Fig. 15 Incubation time prior to hydrogen stress cracking for AISI type 4340 and type D-6AC steel contoured double-cantilever beam test specimens as a function of decrease in stress intensity More
Image
Published: 31 August 2017
Fig. 25 (a) Fatigue striations in a fracture surface of soft aluminum alloy 1100. Original magnification: 2000×. (b) Poorly formed fatigue striations (between arrows) on a fatigue fracture surface of D-6ac steel with a tensile strength of 1795 to 1930 MPa (260 to 280 ksi). Original More
Image
Published: 01 January 2003
Fig. 9 Ductile and brittle fracture morphologies resulting from LMIE. (a) Fracture surface produced by subcritical cracking in D-6ac steel (tempered at 650 °C, or 1200 °F) in liquid mercury showing predominantly dimpled intercrystalline fracture along prior-austenite grain boundaries. (b More
Book Chapter

By Thoni V. Philip, Thomas J. McCaffrey
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001027
EISBN: 978-1-62708-161-0
..., higher-strength 4340. Also from this family are descriptions for the 300M, D-6a and D-6ac, 6150, and 8640 steels. The medium-alloy air-hardening family of ultrahigh-strength steels includes H11 modified and H13 steels. The high fracture toughness family of ultrahigh-strength steels includes HP-9-4-30...
Image
Published: 01 January 2005
Fig. 17 Processing sequences for (a) ring rolling and (b) power spinning rocket engine case cylinders, together with the respective rocket engine case assemblies. See Example 11 . Dimensions in figure given in inches Item Ring-rolled forging (power spun) Material D-6ac steel More
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005953
EISBN: 978-1-62708-168-9
...-strength structural steels, namely, H11 Mod, H13 steel, 300M steel, D-6A and D-6AC, and AF1410 steel. It also provides information on recommended heat treating practices for air-hardening martensitic stainless steels. 300M steel AF1410 steel air-hardening steel austenitizing chemical composition...
Image
Published: 01 January 2005
(revised) Material AMS 6431 (D-6ac steel) (a) (b) Forging equipment 100 MN (11,000 tonf) multiple-ram press Forging operations (c) Roughing (d) ; finishing (e) Heat treatment Anneal (f) (b) ; harden and temper (g) (b) Mechanical properties (h) Inspection Bloom inspection More
Image
Published: 01 January 1993
Fig. 27 Effect of preheating on the hardness of 15 mm (0.6 in.) thick D-6ac low-alloy ultrahigh-strength steel More
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002166
EISBN: 978-1-62708-188-7
... applications, the surface layer affected by electrical discharge grinding may have to be removed. Fig. 4 Effect of heat in electrical discharge grinding on the surface hardness of various work metals. (a) 4340 steel, 50 HRC. (b) D-6ac steel, 50 HRC. (c) Grade 250 maraging steel, 50 HRC. (d) Ti-8Al-1Mo...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003243
EISBN: 978-1-62708-199-3
... on the type of steel. A decrease in the stress-intensity factor from 44 to 22 MPa m (40 to 20 ksi in. ) may change the incubation time from less than 1 h for AISI type 4340 steel to about 1 year for type D-6AC steel. Fig. 15 Incubation time prior to hydrogen stress cracking for AISI...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004040
EISBN: 978-1-62708-185-6
... by drilling and reaming rather than by the use of small-diameter punches. Fig. 5 Three forgings that illustrate forged cavities produced by piercing. (a) Conventional, (b) and (c) seamless forging (cored), together with a (d) typical forging sequence for the production of ring gears. Dimensions given...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005631
EISBN: 978-1-62708-174-0
... 14 Arctic pipeline steel, X-80 Butt 13.2 0.52 12 D-6ac steel Butt 6.4 0.25 15 HY-80 … 12.5 0.49 10.6 HY-130 steel Butt 6.4 0.25 5.5 HY-180 steel (HP9-4-20) Butt 1.6 0.062 5.5 … 1.6 0.062 10.5 … 16.3 0.64 5.5 Nickel-base alloy, Inconel 718 Butt 14.5...
Book Chapter

By Jyoti Mazumder
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001370
EISBN: 978-1-62708-173-3
... 1010 Beam plate 4 0.157 1.8 (a)  AISI 4130 Butt 15.2 0.60 14 Low-alloy high-strength steel, 300M Butt 19.0 0.75 14 Arctic pipeline steel X-80 Butt 13.2 0.52 12 D-6ac steel Butt 6.4 0.25 15 HY-80 … 12.5 0.49 10.6 HY-130 steel Butt 6.4 0.25 5.5 HY-180...
Book Chapter

By Diego O. Fernandino, Roberto E. Boeri
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006323
EISBN: 978-1-62708-179-5
... in a fracture surface of soft aluminum alloy 1100. Original magnification: 2000×. (b) Poorly formed fatigue striations (between arrows) on a fatigue fracture surface of D-6ac steel with a tensile strength of 1795 to 1930 MPa (260 to 280 ksi). Original magnification: 4900×. Source: Ref 10 In particular...
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004036
EISBN: 978-1-62708-185-6
.... Another from of flash, developed as a result of reverse extrusion, is common to seamless forging and is described in the next example. Example 8: Seamless Cylindrical Forging with Reverse-Extruded Flash The propeller barrel forging of AMS 6431 (D-6ac steel) shown in Fig. 12 was deep pierced...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001444
EISBN: 978-1-62708-173-3
...—volume of melt not confined; maximum joining cross section (arrows). (c) Not recommended—maximum confinement of melt (unless gap is provided); joining cross section less than plate cross section. (d) Most favorable—minimum constraint and confinement of melt; minimum internal stresses; warpage can...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003092
EISBN: 978-1-62708-199-3
... 0.10 >0.20–0.30 incl 0.15 >0.30–0.60 incl 0.20 Copper When copper is required, 0.20 minimum is commonly used Lead (d) When lead is required, a range of 0.15–0.35 is generally used Incl, inclusive. Boron-treated fine-grain steels are produced to a range of 0.0005–0.003% B...
Book Chapter

By David G. Kolman
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003635
EISBN: 978-1-62708-182-5
... by subcritical cracking in D-6ac steel (tempered at 650 °C, or 1200 °F) in liquid mercury showing predominantly dimpled intercrystalline fracture along prior-austenite grain boundaries. (b) Fracture surface produced by rapid subcritical crack growth (∼1 mm/s, or 0.4 in./s) in a Cu-1.9Be alloy in liquid mercury...