Espulsori e sistemi estrazione.pdf - MANDELLI NORMALIZZATI SpA

Appendice
Correzioni da aggiungere ai valori di lettura “C” Rockwell ottenuti su superfici cilindriche
Lettura ottenuta (valore leggibile all’interno della macchina durante la misurazione della durezza) Reale valore
HRC
ø 2 mm ø 3 mm ø 4 mm ø 5 mm ø 6 mm ø 7 mm ø 8 mm ø 9 mm ø 10 mm
15,0 18,5 22,0 24,0 25,0 26,0 26,5 27,0 27,5 30
16,5 20,0 23,0 25,0 26,0 27,0 27,5 28,0 28,5 31
18,0 21,0 24,0 26,0 27,5 28,0 29,0 29,5 29,5 32
19,0 22,5 25,5 27,5 28,5 29,0 30,0 30,5 30,5 33
20,5 23,5 26,5 28,5 29,5 30,5 31,0 31,5 32,5 34
21,5 25,0 27,5 29,5 30,5 31,5 32,0 32,5 33,0 35
23,0 26,0 29,0 30,5 31,5 32,5 33,0 33,5 34,0 36
24,5 27,5 30,0 31,5 33,0 33,5 34,0 34,5 35,0 37
25,5 28,5 31,0 33,0 34,0 34,5 35,0 35,5 36,0 38
27,0 30,0 32,5 34,0 35,0 35,5 36,5 36,5 37,0 39
28,5 31,0 33,5 35,0 36,0 37,0 37,5 37,5 38,0 40
29,5 32,5 34,5 36,0 37,0 38,0 38,5 39,0 39,0 41
31,0 33,5 36,0 37,5 38,0 39,0 39,5 40,0 40,0 42
32,0 35,0 37,0 38,5 39,5 40,0 40,5 41,0 41,5 43
33,5 36,0 38,0 39,5 40,5 41,0 41,5 42,0 42,5 44
35,0 37,5 39,5 40,5 41,5 42,0 42,5 43,0 43,5 45
36,0 38,5 40,5 42,0 42,5 43,5 43,5 44,0 44,5 46
37,5 40,0 41,5 43,0 43,5 44,5 45,0 45,0 45,5 47
39,0 41,0 43,0 44,0 45,0 45,5 46,0 46,0 46,5 48
40,0 42,0 44,0 45,0 46,0 46,5 47,0 47,5 47,5 49
41,5 43,5 45,0 46,5 47,0 47,5 48,0 48,5 48,5 50
43,0 44,5 46,5 47,5 48,0 48,5 49,0 49,5 49,5 51
44,0 46,0 47,5 48,5 49,0 49,5 50,0 50,5 51,0 52
45,5 47,0 48,5 49,5 50,5 51,0 51,0 51,5 52,0 53
46,5 48,5 50,0 51,0 51,5 52,0 52,5 52,5 53,0 54
48,0 49,5 51,0 52,0 52,5 53,0 53,5 53,5 54,0 55
49,5 51,0 52,0 53,0 53,5 54,0 54,5 54,5 55,0 56
50,5 52,0 53,5 54,0 54,5 55,0 55,5 56,0 56,0 57
52,0 53,5 54,5 55,5 56,0 56,0 56,5 57,0 57,0 58
53,5 54,3 55,5 56,5 57,0 57,5 57,5 58,0 58,0 59
54,5 56,0 57,0 57,5 58,0 58,5 58,5 59,0 59,0 60
56,0 57,0 58,0 58,5 59,0 59,5 60,0 60,0 60,5 61
57,5 58,5 59,0 59,5 60,0 60,5 61,0 61,0 61,5 62
58,5 59,5 60,5 61,0 61,5 61,5 62,0 62,0 62,5 63
60,0 61,0 61,5 62,0 62,5 62,5 63,0 63,0 63,5 64
61,0 62,0 62,5 63,0 63,5 64,0 64,0 64,5 64,5 65
62,5 63,5 64,0 64,0 64,5 65,0 65,0 65,5 65,5 66
64,0 64,5 65,0 65,5 65,5 66,0 66,0 66,5 66,5 67
65,0 66,0 66,0 66,5 66,5 67,0 67,5 67,5 67,2 68
Riferimento incrociato - Standard sull’acciaio
Gruppo mat. W. n. EN AFNOR AISI
1.2067 100 Cr 6 100 C6 ~L3
WS
1.2510 100 MnCrW 4 90MCWV 5 O1
1.2210 115 CrV 3 115 CV 3 L2
WAS
1.2343
1.2344
X 38 CrMoV 5
X 40 CrMoV 5 1
Z 38 CDV 5
Z 40 CDV 5
H11
H13
Gli standard sull’acciaio attualmente utilizzati da DME sono evidenziati in grassetto.
44 - www.dmeeu.com