INVESTMENT CASTING
– DIMENSIONAL TOLERANCES
As a general rule normal linear tolerance on an investment casting
can be +0,75% of the
nominal dimension, with a minimum of +0,10
mm for dimensions lower than 15 mm in order
to achieve closer tolerances, a machining allowance is required,
but never forget that an investment casting always permits to
reach very complex geometries.
As a good rule severe tolerances are to be avoided if not necessary
to allow the higher production yelds and lower piece costs.
Therefore, functional or closer dimensions must be pointed out
in the drawings and dealed with the technical department.
STEELS
FOR INVESTMENT CASTING
|
| LOW
CARBON steels |
| C10 |
C15 |
12NiCr3 |
16CrNi4 |
16NiCr11 |
16NiCrMo2 |
16NiCrMo12 |
| 16MnCr5 |
18CrMo4 |
18NiCrMo5 |
18NiCrMo7 |
20MnCr5 |
20CrNi4 |
20NiCrMo2 |
| |
|
|
|
| HARDENING
steels |
| C20 |
C25 |
C30 |
C35 |
C40 |
C45 |
C55 |
| C50 |
C60 |
25CrMo4 |
C28Mn |
30CrMo4 |
30NiCrMo8 |
30NiCrMo12 |
| 32CrMo12 |
34NiCrMo16 |
34Cr4 |
35CrMo4 |
35NiCrMo15 |
36CrMn5 |
38Cr2 |
| 39NiCrMo3 |
42CrMo4 |
40NiCrMo2 |
40NiCrMo7 |
41Cr4 |
50CrMo4 |
90Mn4 |
|
| |
| SPRING
steels |
| 48Si7 |
55Si7 |
60Si7 |
60SiCr8 |
52SiCrNi5 |
45SiCrMo6 |
55Cr3 |
| 50CrV4 |
51CrMoV4 |
|
|
|
| |
| BEARING
steels |
| 100Cr6 |
100CrMo7 |
X45Cr13 |
X105CrMo17 |
X80MoCrV44 |
X82MoWMoV65 |
X75WCrV13 |
|
| |
| TOOL
steels |
| X155CrVMo12.1
KU |
X205Cr12KU |
X37CrMoV5.1KU |
X40CrMoV51.1KU |
| 90MnVCr8KU |
95MnWCr5KU |
HS 2-9-1-8 |
HS 6-5-2 |
45WCrV8KU |
| HS 18-0-1 |
|
|
| |
| STAINLESS steels |
| AUSTENITIC (AISI) |
|
| 201 |
202 |
301 |
302 |
303 |
304 |
304LN |
| 304H |
304L |
305 |
309 |
310 |
314 |
316 |
| 316L |
316H |
316LN |
316N |
316F |
316Ti |
316Cb |
| 317 |
317L |
317LN |
321 |
321H |
347 |
347H |
| 310MoLN |
XM19 |
330 |
|
| DUPLEX (UNS) |
|
| S32900 |
S31803 |
S32304 |
S32750 |
S32550 |
S32760 |
|
| FERRITIC
(AISI) |
|
| 405 |
409 |
410S |
430 |
430F |
434 |
439 |
| XM-34 |
446 |
|
| MARTENSITIC
(AISI) |
|
| 403 |
414 |
416 |
420 |
420F |
422 |
431 |
| 440A |
440B |
440C |
|
| PRECIPITATION
HARDENING (UNI) |
|
| 17-4PH |
15-5PH |
PH 15-7 Mo |
17-7PH |
17-10P |
|
|
| |
| NICKEL
BASE ALLOYS |
|
| |
| COBALT
BASE ALLOYS |
|
INVESTMENT
CASTING GENERAL TOLERANCES
|
|
| NOMINAL
DIM. (mm) |
Lenght,
Width, Height
LINEAR PRECISION GRADES |
| Up |
To |
D1 |
D2 |
D3 |
| |
6 |
±0,10 |
±0,08 |
±0,06 |
| 6 |
10 |
±0,12 |
±0,10 |
| 10 |
14 |
±0,15 |
±0,12 |
±0,09 |
| 14 |
18 |
±0,20 |
±0,14 |
| 18 |
24 |
±0,25 |
±0,17 |
±0,12 |
| 24 |
30 |
±0,30 |
±0,20 |
±0,14 |
| 30 |
40 |
±0,37 |
±0,25 |
±0,17 |
| 40 |
50 |
±0,44 |
±0,30 |
±0,20 |
| 50 |
65 |
±0,52 |
±0,38 |
±0,23 |
| 65 |
80 |
±0,60 |
±0,46 |
±0,27 |
| 80 |
100 |
±0,68 |
±0,53 |
±0,30 |
| 100 |
120 |
±0,76 |
±0,60 |
±0,33 |
| 120 |
140 |
±0,84 |
±0,65 |
±0,36 |
| 140 |
160 |
±0,92 |
±0,72 |
±0,38 |
| 160 |
180 |
±1,02 |
±0,80 |
±0,42 |
| 180 |
200 |
±1,12 |
±0,88 |
±0,43 |
| 200 |
225 |
±1,28 |
±0,95 |
±0,47 |
| 225 |
250 |
±1,44 |
±1,05 |
±0,51 |
| 250 |
280 |
±1,64 |
±1,15 |
±0,56 |
| 280 |
315 |
±1,84 |
±1,25 |
±0,63 |
| 315 |
355 |
±2,10 |
±1,40 |
±0,71 |
| 355 |
400 |
±2,40 |
±1,60 |
±0,80 |
| 400 |
450 |
±2,70 |
±1,80 |
±0,90 |
| 450 |
500 |
±3,00 |
±2,00 |
±1,00 |
D1: Non-functional dimensions |
| D2: Tolerances
required |
| D3: Tolerances
required and dealed with costumer |
|
SHAPE TOLERANCES
|
| Dimension
(mm) |
Variance |
| Up to 15 mm |
0,10 |
| 15 to 25 mm |
0,15 |
| 25 to 50 mm |
0,25 |
| 50 to 100 mm |
0,50 |
| over 100 mm |
0,5% dimension |
| |
|
STEELS FOR
M.I.M.
|
|
| Low
alloy steels for heat treatment |
| FN02 |
Carbonyl Iron with 2% nickel
|
| FN0205 |
Carbonyl Iron with 2% nickel
|
| FN08 |
Carbonyl Iron with 8% nickel
|
| 8620 |
21NiCrMo2 |
| 42CrMo4 |
42CrMo4 |
| 100Cr6 |
Wear resistant |
| |
| Stainless
and heat resistant steels |
| AISI 316L |
Austenitic |
| P.A.N.A.C.E.A. |
Austenitic nickel free |
| 17-4PH |
Precipitation hardening |
| 430 |
Ferritic |
| 420 |
Martensitic |
| 310 |
Austenitic |
| 440B |
Martensitic |
| |
| Tool
steels |
| M2 |
Wear resistant (AISI M2) |
| |
| Soft
magnetic alloys |
| F |
Carbonyl Iron |
| FeSi3 |
Carbonyl Iron with 3% of silicon |
| FN50 |
Carbonyl Iron with 50% nickel
|
| |
| Super-alloys |
| W |
Tungsten heavy metal |
| F15 |
Fe-Ni-Co alloy |
| HX |
Nickel base |
|
GENERAL
M.I.M. TOLERANCES
|
| Dimension
(mm) |
Tolerance |
| 1÷3 |
± 0,045 |
| 3÷6 |
± 0,055 |
| 6÷10 |
± 0,075 |
| 10÷18 |
± 0,095 |
| 18÷30 |
± 0,135 |
| 30÷50 |
± 0,200 |
| 50÷80 |
± 0,275 |
| 80÷120 |
± 0,500 |
If you need particular toleraces please contact
our technical department. |
|
|
|
