0613-D4648A-D-2 Pg 1 of 5 Distaloy®® 4600A Distaloy 4800A Distaloy steel powders were developed to extend the capability of P/M parts to satisfy the needs of today's technology where higher strength and toughness are required. Typical Analysis and Properties Description The alloy content is composed of nickel, Chemistry (weight %) (w/o) molybdenum, and copper, and conforms to MPIF Material Standard 35, Material Designations Ni Mo Cu C Oxygen FD-02XX and FD-04XX. Conventional sintering Distaloy 4600A 1.75 0.50 1.50 <0.01 0.13 practice is adequate for meeting high performance Distaloy 4800A 4.00 0.50 1.50 <0.01 0.13 requirements. The additives are diffusion alloyed to maintain compressibility of the base atomized iron. The recommended density range is 6.8 g/cm3 and above. Apparent Density, g/cm3 Flow Rate, s/50g The composition is balanced to give excellent properties along with close dimensional control. Distaloy 4600A 3.0 Distaloy 4600A 27 Application Distaloy 4800A 3.0 Distaloy 4800A 25 • Parts requiring greater toughness than attainable with conventional P/M materials. Distaloy 4800A is recommended for more Sieve Analysis, (U.S. Standard) (w/o) severe conditions. • Parts subjected to "brinelling" type of loading. Micrometers +250 -250 / +150 -150 / +45 -45 • Parts subjected to dynamic loading. U.S. Standard Mesh (+60) (-60 / +100) (-100 / +325) (-325) • Parts with close dimensional tolerances. Distaloy 4600A Trace 6 71 23 Compressibility and Green Strength Distaloy 4800A Trace 6 71 23 The diffusion-alloying technique used in making the Distaloys retains the high compressibility of the base atomized iron. Both powders have good green strength in the design density range. The Effects of Compaction Pressure on Green Density The Effects of Green Density on Green Strength Distaloy 4600A and Distaloy 4800A Distaloy 4600A and Distaloy 4800A Compaction Pressure (tsi) 30 40 50 60 7.3 2800 19 18 7.2 17 0A oy 480 2400 l Green Density (g/cm3) a Dist Green Strength (MPa) 0A 16 7.1 y 480 Green Strength (psi) talo 15 d Dis A an 14 00A 2000 7.0 00 loy 46 y 46 13 Dista o tal 12 Dis 6.9 11 1600 10 6.8 9 0.6 w/o graphite + 0.75 w/o Acrawax 0.6 w/o graphite + 0.75 w/o Acrawax 1200 8 6.7 7 500 600 700 800 6.7 6.8 6.9 7.0 7.1 7.2 Compaction Pressure (MPa) Green Density (g/cm3) NORTH AMERICA (Headquarters) Cinnaminson, NJ: +1-856-829-2220, tim.hale@hoeganaes.com ASIA Seoul, Korea: +82-2-3486-4471, jongsik.na@hoeganaes.com EUROPE Meerbusch, Germany: +49-2132-6598-20, klaus.vossen@hoeganaes.com Pudong Shanghai, China: +86-21-5820-2997, oliver.he@hoeganaes.com Tokyo, Japan: +81-3-5476-6165, tony.nishida@hoeganaes.com 0613-D4648A-D-2 Data Sheet Pg 2 of 5 Distaloy 4600A / Distaloy 4800A Compressibility Curves for Double Pressing-Double Sintering To achieve strength, hardness, and toughness higher than Double Pressed/Double Sintered attainable at 7.1g/cm3, the double press-double Distaloy 4600A and Distaloy 4800A Repressing Pressure (tsi) sinter approach is used. 30 40 50 Sintered and Heat Treated Properties 7.4 The static and dynamic mechanical properties are shown for the Distaloys premixed with 0.6 w/o 7.3 0 tsi) graphite and 0.75 w/o Acrawax C. Tensile test Pa (5 0 tsi ) Sintered Density (g/cm3) M specimens were prepared and tested in accordance 690 Pa (4 550M with MPIF Standard 10 (ASTM E 8). The 7.2 "dog bone" specimen geometry was used to tsi) determine the sintered tensile properties and the 30 7.1 MPa ( machined round specimen was used to determine 410 the tensile properties in the heat treated 7.0 condition. Elongation was measured from a 25.4mm (one inch) gauge length and yield 6.9 strength was measured at 0.2% offset. Unnotched Presintered at 840ºC (1550ºF) Charpy impact specimens were prepared and Sintered at 1120ºC (2050ºF) tested in accordance with MPIF Standard 40 6.8 400 500 600 700 (ASTM E 23). Rotating bending fatigue (RBF) Repressing Pressure (MPa) specimens were machined from sintered, rectangular compacts to the dimensions outlined in MPIF Standard 56. Dimensional Change of Distaloy 4600A The test specimens described above were pressed Sintered and Heat Treated to various density levels, sintered in dissociated +0.3 ammonia (D.A.) at 1120ºC (2050ºF) for 30 minutes at temperature and cooled in a water Sintered +0.2 jacketed cooling chamber. The dimensional [% in 25.4 mm (1 inch)] change values are measured from die size Dimensional Change ed Treat (carbide die) as a function of sintered density. Heat +0.1 Heat treatment was performed at 840ºC (1550ºF) for 15 minutes at temperature followed by quenching in oil at 50ºC (120ºF). The 0.0 atmosphere was dissociated ammonia with methane additions. The quenched parts were stress relieved for one hour at 175ºC (350ºF) in -0.1 air. Higher temperature 260ºC (500ºF) stress relieving will result in higher toughness but 6.7 6.8 6.9 7.0 7.1 7.2 7.3 generally at the expense of hardness. Good heat Sintered Density (g/cm3) treated properties can only be obtained if parts are well-sintered. The hardenability of the Distaloys is Dimensional Change of Distaloy 4800A adequate for most P/M parts. The higher alloyed Sintered and Heat Treated Distaloys 4800A is prefered for parts with thicker +0.3 ruling sections. +0.2 [% in 25.4 mm ( 1 inch)] Dimensional Change +0.1 Sintered 0.0 eated Heat Tr -0.1 6.7 6.8 6.9 7.0 7.1 7.2 7.3 Sintered Density (g/cm3) NORTH AMERICA (Headquarters) Cinnaminson, NJ: +1-856-829-2220, tim.hale@hoeganaes.com ASIA Seoul, Korea: +82-2-3486-4471, jongsik.na@hoeganaes.com EUROPE Meerbusch, Germany: +49-2132-6598-20, klaus.vossen@hoeganaes.com Pudong Shanghai, China: +86-21-5820-2997, oliver.he@hoeganaes.com Tokyo, Japan: +81-3-5476-6165, tony.nishida@hoeganaes.com 0613-D4648A-D-2 Data Sheet Pg 3 of 5 Distaloy 4600A / Distaloy 4800A Fatigue Endurance Limit vs Tensile Strength for Distaloy 4600A and Distaloy 4800A Processed Under Various Conditions Ultimate Tensile Strength (103 psi) 60 80 100 120 140 160 180 350 50 Compaction Graphite Sintering Material Pressure Addition Temperature 300 MPa (tsi) (w/o) ºC (ºF) Endurance Limit (103 psi) Endurance Limit (MPa) 40 440 (34) 0.6 1120 (2050) 250 Distaloy 4600A 680 (45) 0.6 1260 (2300) 30 680 (45) 0.6 1120 (2050) 200 690 (50) 0.4 1120 (2050) 150 20 Distaloy 4800A 690 (50) 0.4 1260 (2300) 100 690 (50*) 0.6 1120 (2050) 10 400 500 600 700 800 900 1000 1100 1200 1300 *Repressed at 690 MPa (50tsi) Ultimate Tensile Strength (MPa) Effect of Sintered Density on the Room Temperature Impact Energy of Distaloy 4600A and Distaloy 4800A 40 30 35 25 30 Impact Energy (Joules) Impact Energy (ft. lbf) 20 25 20 15 15 10 10 5 5 0 0 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 Sintered Density (g/cm3) Graphite Sintered Austenitizing Tempering Heat Treated Material Addition Impact Temperature Temperature Impact Energy (w/o) Joules (ft. lbf) ºC (ºF) ºC (ºF) Joules (ft. lbf) Specimens were compacted to a 0.4 22 (16) 840 (1550) 175 (350) 11 (8) density of 7.0 g/cm3 0.6 15 (11) 815 (1500) 180 (375) 12 (9) Sintering was performed at Distaloy 4600A 1120ºC (2050ºF) for 30 minutes at 0.8 14 (10) 800 (1475) 230 (450) 11 (8) temperature in dissociated ammonia. 0.8* 14 (10) *Sintered and then stress relieved at 0.4 22 (16) 840 (1550) 175 (350) 10 (7) 175ºC (350ºF) for 60 minutes in air. 0.6 20 (15) 815 (1500) 190 (375) 12 (9) *Heat treatment consisted of Distaloy 4800A austenitizing in dissociated ammonia 0.8 18 (13) 800 (1475) 230 (450) 12 (9) for 15 minutes at temperature then quenching in oil at 65ºC (150ºF) and 0.8* 19 (14) tempering for 60 minutes in air. *Repressed at 690 MPa (50 tsi) NORTH AMERICA (Headquarters) Cinnaminson, NJ: +1-856-829-2220, tim.hale@hoeganaes.com ASIA Seoul, Korea: +82-2-3486-4471, jongsik.na@hoeganaes.com EUROPE Meerbusch, Germany: +49-2132-6598-20, klaus.vossen@hoeganaes.com Pudong Shanghai, China: +86-21-5820-2997, oliver.he@hoeganaes.com Tokyo, Japan: +81-3-5476-6165, tony.nishida@hoeganaes.com 0613-D4648A-D-2 Data Sheet Pg 4 of 5 Distaloy 4600A / Distaloy 4800A Tensile Properties of Distaloy 4600A Tensile Properties of Distaloy 4800A Sintered and Heat Treated Sintered and Heat Treated 250 250 1500 1500 ength 200 ngth 200 sile Str Tensil e Stre Strength (103 psi) Strength (103 psi) 1250 te Ten Strength (MPa) a 1250 te Strength (MPa) Ultim Ultima 1000 150 150 ength 1000 ength Heat Yield Str Heat Yield Str Treated Treated ngth 750 nsile Streng th 100 750 Ultimate Te nsile Stre 100 Ultimate Te 500 500 Sintered 50 Sintered 50 Yield Strength Yield Strength 250 250 0 0 0 0 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 Sintered Density (g/cm3) Sintered Density (g/cm3) Tensile Elongation of Distaloy 4600A Tensile Elongation of Distaloy 4800A Sintered and Heat Treated Sintered and Heat Treated 4 4 Elongation [% in 25.4mm (1 inch)] Elongation [% in 25.4mm (1 inch)] red Sinte red Sinte 3 3 2 2 1 Heat Treated 1 Heat Treated 0 0 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 Sintered Density (g/cm3) Sintered Density (g/cm3) Apparent Hardness of Distaloy 4600A Apparent Hardness of Distaloy 4800A Sintered and Heat Treated Sintered and Heat Treated 45 45 Heat Treated Hardness (HRC) 40 40 Heat Treated Hardness (HRC) reated Sintered Hardness (HRB) Heat T Sintered Hardness (HRB) 35 35 reated 30 30 Heat T 100 25 100 25 20 20 15 Sintere d 15 90 90 ered 80 Sint 80 70 70 6.7 6.8 6.9 7.0 7.1 7.2 7.3 6.7 6.8 6.9 7.0 7.1 7.2 7.3 Sintered Density (g/cm3) Sintered Density (g/cm3) NORTH AMERICA (Headquarters) Cinnaminson, NJ: +1-856-829-2220, tim.hale@hoeganaes.com ASIA Seoul, Korea: +82-2-3486-4471, jongsik.na@hoeganaes.com EUROPE Meerbusch, Germany: +49-2132-6598-20, klaus.vossen@hoeganaes.com Pudong Shanghai, China: +86-21-5820-2997, oliver.he@hoeganaes.com Tokyo, Japan: +81-3-5476-6165, tony.nishida@hoeganaes.com 0613-D4648A-D-2 Data Sheet Pg 5 of 5 Distaloy 4600A / Distaloy 4800A Effect of Graphite Additions To determine the effect A stress relief anneal at 175ºC (350ºF) tempers the of varying graphite additions, MPIF Standard 41 martensite formed by cooling from the sintering (ASTM B-528) transverse rupture bars were prepared temperature and increases the strength appreciably, with graphite additions of 0.2 w/o to 1.1 w/o and were reaching a maximum at 0.8 w/o graphite. The stress pressed to 7.0 g/cm3. The bars were sintered at 1120ºC relief anneal has no significant effect on the sintered (2050ºF) for 30 minutes at temperature in dissociated hardness or dimensional change. ammonia. The transverse rupture strength, apparent The formation of martensite must be considered if hardness, and dimensional change are shown. the parts require secondary machining. The graphs show that the strength of both Distaloys reaches a maximum and then decreases when 0.6 w/o graphite is exceeded. This is caused by the formation of areas of untempered martensite. Effect of Graphite Additions and Stress Relief Effect of Graphite Additions and Stress Relief Annealing on Transverse Rupture Strength Annealing on Transverse Rupture Strength of Distaloy 4600A of Distaloy 4800A 200 200 Transverse Rupture Strength (103 psi) 1400 1400 Tranverse Rupture Strength (103 psi) Transverse Rupture Strength (MPa) Transverse Rupture Strength (MPa) Stress Relieved Stress 190 190 1300 Relieved 1300 180 180 1200 170 1200 170 Sintered 1100 160 1100 160 Sintered 150 150 1000 1000 140 140 900 130 900 130 800 120 800 120 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 Graphite Added (w/o) Graphite Added (w/o) Effect of Graphite Additions on the Sintered Effect of Graphite Additions on the Dimensional Hardness of Distaloy 4600A and 4800A Change of Distaloy 4600A and Distaloy 4800A Dimensional Change [% in 24.5mm (1 inch)] 100 +0.30 Distaloy 4600A +0.20 90 Distaloy 4800A Distaloy 4800A Hardness (HRB) +0.10 80 0 70 -0.10 Distaloy 4600A 60 -0.20 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 Graphite Added (w/o) Graphite Added (w/o) IMPORTANT NOTICE: The data shown are based on laboratory processing standard test specimens. Results may vary from that obtained in production processing. NORTH AMERICA (Headquarters) Cinnaminson, NJ: +1-856-829-2220, tim.hale@hoeganaes.com ASIA Seoul, Korea: +82-2-3486-4471, jongsik.na@hoeganaes.com EUROPE Meerbusch, Germany: +49-2132-6598-20, klaus.vossen@hoeganaes.com Pudong Shanghai, China: +86-21-5820-2997, oliver.he@hoeganaes.com Tokyo, Japan: +81-3-5476-6165, tony.nishida@hoeganaes.com
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