SINTERED ALLOY STEELS
| Material |
Sintering
cycle |
r
g/cm3 |
E
GPa |
Rm
MPa |
Rm
MPa |
Hardness
|
A5
% |
J*
|
||
|
Static
|
Cyclic
|
HB
2.5/62.5 |
HV10
(HV20) |
|||||||
| Fe-1.5Cu |
SL
SL PS+R+SL |
6.8
7.1 7.4 |
145
152 190 |
244
286 340 |
195
228 235 |
202
235 270 |
85
100 122 |
.
|
9.1
8.8 13.3 |
14.7
29.7 66.0 |
| Fe-1.5 Cu-0.6C |
SL
SL PS+R+SL |
6.9
7.2 7.4 |
135
153 182 |
433
483 500 |
379
418 470 |
350
398 460 |
122
142 160 |
.
|
3.6
4.4 6.8 |
9.5
12.1 35.3 |
| Fe-0.45P |
SL
SL PL+R+SL |
6.8
7.1 7.4 |
142
169 202 |
253
332 450 |
238
280 355 |
238
285 405 |
93
113 138 |
.
|
3.1
5.6 14.9 |
11.0
27.0 38.0 |
| Fe-2Cu-2.5Ni |
SH
SH PS+R+SH |
6 8
7.1 7.4 |
136
160 192 |
289
336 437 |
272
308 371 |
317
351 415 |
93
116 130 |
.
|
3.9
6.9 11.4 |
15.1
32.7 73.3 |
| Fe-1.75Ni-1.5Cu -0.5Mo-0.6C |
SL
|
7.12
|
.
|
610
|
435
|
.
|
.
|
210
|
3.0
|
24.0
|
| Fe-4Ni-1.5Cu- -0.5Mo-0.5C |
SL
SH |
7.25
7.3 |
.
|
700
850 |
370
480 |
.
|
.
|
210
290 |
2.0
2.2 |
27.3
27.3 |
| Fe-4Ni-2Cu-1.5Mo -0.5C |
SL
SH |
7.1
7.1 |
.
|
1050
1180 |
550
700 |
.
|
.
|
275
335 |
3.1
2.0 |
25.0
22.0 |
| Fe-8Ni-1Mo-0.5C |
SL
|
7.35
|
160
|
1020
|
570
|
725
|
.
|
340
|
4.5
|
.
|
| Fe-0.8Mn-0.95Cr- 0.24Mo-0.6C |
SL
|
7.03
|
168
|
713
|
615
|
.
|
.
|
218
|
3.9
|
27.3
|
| HEAT TREATED PM ALLOY STEELS | ||||||||||
| Fe-1.5Cu | SH+CN SH+CN |
6.8 7.1 |
137 158 |
635 770 |
. | . | . | 537 582 |
<1 <1 |
6.3 7.8 |
| Fe-1.5Cu-0.6C | SH+H1 SH+H1 |
6.8 7.1 |
137 145 |
750 810 |
737 773 |
730 770 |
. | 252 312 |
1.3 1.6 |
5.7 8.0 |
| Fe-1.75Ni-1.5Cu- -0.5Mo-0.6C |
SH+H2 | 7.12 | . | 1100 | 1050 | . | . | 400 | 1.8 | . |
| Fe-4Ni-1.5Cu- 0.5Mo-0.5C |
SH+H3 | 7.25 | . | 1050 | 970 | . | . | 420 | 0.9 | 15 |
| Fe-0.8Mn-0.95Cr- 0.24Mo-0.6C |
SH+H4 | 7.14 | 168 | 1177 | 1125 | . | . | 329 | 1.4 | 15.3 |
| Fe-2Cu-1.5Mo-0.4C | PS+R+SL+H3 | 7.52 | . | 1510 | . | . | . | 430 | 2.0 | . |
Key:
* - Unnotched Charpy test
SL - Sintered at 1120-1150°C x 20-30 min (standard sintering conditions
for PM steels), in N2+H2 atmosphere
SH - Sintered at 1250-1280°C x 30-60 min (high sintering temperature),
in N2 + H2
PS+R - Pre-sintered at 750-800°C x 30 min and re-pressed
CN - Carbonitrided at 920°C x 3.5h, quenched at 60°C in oil
H1 - Austenitized at 840°C x 1h, quenched at 60°C in oil, tempered at
430°C x 1h
H2 - Austenitized at 850°C x 30 min, quenched at 50°C in oil, tempered
at 175°C x 1h
H3 - Austenitized at 860°C x 30 min, quenched at 60°C in oil, tempered
at 175°C x 1h
H4 - Austenitized at 900°C x 30 min, quenched at 60°C in oil, tempered
at 300°C x 1h
Data sources: Publications of C M Sonsino and Höganäs pamphlets on partially
pre-alloyed iron powders,
published in 'Guide to Design of Sintered Parts' and reprinted with permission
of Assinter, Italy