|
VICKERS |
SHORE |
ROCKWELL |
BRINELL |
EQUOTIP |
Ultimate tensile |
|||
|
HV
30 |
HFRSc
|
HSc |
HSC |
HRc |
HB |
LD |
LE |
strength |
|
|
HFRSd |
HSd |
HSD |
|
|
|
|
UTS (N/mm²) |
|
ASTM E92 (b) |
ASTM E448 Forged (c) |
ASTM E448 Standard (d) |
JIS B7727 (e) |
ASTM E18 (f) |
ASTM E10 (g) |
ASTM A956 (h) |
ASTM A956 (i) |
DIN 50150 |
|
940 |
- |
97.5 |
- |
68 |
- |
890 |
855 |
|
|
920 |
105 |
96 |
102 |
67.5 |
- |
885 |
850 |
|
|
900 |
103 |
95 |
100.5 |
67 |
- |
880 |
845 |
|
|
880 |
101.5 |
94 |
99 |
66.5 |
- |
870 |
840 |
|
|
860 |
100 |
92.5 |
97 |
66 |
- |
865 |
830 |
|
|
840 |
98.5 |
91 |
95.5 |
65.5 |
- |
860 |
825 |
|
|
820 |
96.5 |
90 |
94 |
64.5 |
- |
855 |
820 |
|
|
800 |
95 |
88.5 |
92.5 |
64 |
- |
845 |
810 |
|
|
780 |
93.5 |
87 |
91 |
63.5 |
- |
840 |
805 |
|
|
760 |
92 |
85.5 |
89.5 |
62.5 |
- |
830 |
800 |
|
|
740 |
90.5 |
84 |
87.5 |
61.5 |
- |
825 |
790 |
|
|
720 |
89 |
82.5 |
86 |
61 |
- |
815 |
780 |
|
|
700 |
87 |
81 |
85 |
60 |
- |
810 |
775 |
|
|
680 |
85.5 |
79.5 |
83.5 |
59.5 |
- |
800 |
765 |
|
|
660 |
84 |
78 |
82 |
58.5 |
- |
790 |
760 |
|
|
640 |
82.5 |
76 |
80.5 |
57.5 |
600 |
785 |
750 |
2145 |
|
620 |
81 |
74.5 |
78.5 |
56.5 |
585 |
775 |
740 |
2070 |
|
600 |
79 |
73 |
76.5 |
55.5 |
565 |
765 |
730 |
1995 |
|
580 |
77.5 |
71 |
75 |
54.5 |
545 |
755 |
720 |
1920 |
|
560 |
76 |
69.5 |
73 |
53 |
525 |
745 |
710 |
1845 |
|
540 |
74.5 |
67.5 |
71 |
51.5 |
510 |
735 |
700 |
1775 |
|
520 |
73 (72) |
66 |
69 |
50.5 |
490 |
725 |
690 |
1700 |
|
500 |
71.5 (69.5) |
64 |
67 |
49 |
470 |
710 |
680 |
1630 |
|
480 |
70 (67.5) |
62 |
65 |
47.5 |
450 |
700 |
665 |
1555 |
|
460 |
68.5 (66) |
60 |
63 |
46 |
435 |
690 |
655 |
1485 |
|
440 |
66.5 (63.5) |
58 |
61 |
44.5 |
415 |
675 |
640 |
1420 |
|
420 |
65 (61) |
56 |
59 |
43 |
400 |
660 |
630 |
1350 |
|
400 |
(57) |
53.5 |
57 |
41 |
380 |
645 |
615 |
1290 |
|
380 |
(56) |
51.5 |
54 |
39 |
360 |
630 |
600 |
1220 |
|
360 |
(53.5) |
49 |
52 |
37 |
340 |
615 |
585 |
1155 |
|
340 |
(51) |
46.5 |
49 |
34.5 |
325 |
600 |
570 |
1095 |
|
320 |
(50.5) |
44 |
46.5 |
32.5 |
305 |
585 |
555 |
1030 |
|
300 |
(48.5) |
42 |
44 |
30 |
285 |
565 |
540 |
965 |
|
280 |
(45.5) |
39.5 |
41.5 |
27 |
265 |
550 |
525 |
900 |
|
260 |
|
37 |
39 |
24 |
250 |
530 |
510 |
835 |
|
240 |
|
34.5 |
36 |
20.5 |
230 |
510 |
490 |
770 |
ASTM E 140 Hardness Conversion Tables for Metals
Steel
Hardness Conversion Table
Conversion Tables for Hardness Scales-Cast Rolls
NOTE (a)
·
Conversion tables are approximate and are only given as working
indication for FORCAST purposes.
·
Hardness conversion is proscribed in any case. Orders
compulsorily have to be realised and measured according to the hardness scale
specified on the purchase order or on the drawing.
·
Values are round numbers. Whether more precision is needed, refer to
reference tables (ASTM A427, ASTM E140, Equotip, ...).
·
In order to avoid confusions, hardness symbols notations (HV, HB, HRc,
...) have to be respected for each standard (refer to notes).
NOTE (b)
·
Symbol : HV (some standards
indicate DPH or DPN).
·
Vickers test is generally made under a load of 30 kgf and is referenced
as HV30.
·
Official standard : ASTM E92 (description, precautions, ...).
NOTE (c)
·
Symbol : HFRSc
(« Hardness Forged Roll Scleroscope Model c »).
HFRSd
(« Hardness Forged Roll Scleroscope Model d »).
·
Calibration for forged steel.
·
“ MODEL c ” Direct reading from the rebound height.
“ MODEL
d ” Hardness reading on graduated dial.
·
Official standards : ASTM E448
(description, precautions, etc.).
ASTM
A427 (conversion HFRSc Û HV).
·
ASTM E448 standard only differentiates the two equipments by the reading
method (rebound or dial). Theoretically hardness values are announced as
identical. However, some non-official tables show a difference.
·
ASTM A427 official conversion table stops at 65 HFRSc, values in
brackets are extracted from ALCOA conversion table and are given as information.
NOTE (d)
·
Symbol : HSc
(« Hardness Scleroscope MODEL c »)
HSd
(« Hardness Scleroscope MODEL d »)
·
Standard Calibration
·
“ MODEL c ” Direct reading from the rebound height.
·
“ MODEL d ” Hardness reading on graduated dial.
·
Official standards : ASTM E448
(description, precautions, calibration, ...)
ASTM
E140 (conversion HRc Þ
HV Þ HB Þ HSc).
·
ASTM E448 standard only differentiates both equipments by the reading
method (rebound or dial). Theoretically, hardness values are announced as
identical. However, some non-official
tables show a difference.
NOTE (e)
·
Symbol : HSC (“ Hardness
Scleroscope MODEL C ”)
HSD
(“ Hardness Scleroscope MODEL D ”).
·
Standard calibration : Japanese
origin testing block ( brand YAMAMOTO).
·
Values “ C ” or “ D ” are identical. Only the
reading method varies Þ
“ C ” (rebound height), “ D ” (on graduated dial).
·
Official standards : JIS B7727
(equipments description)
JIS
Z2246 (measure method).
·
Conversion tables : conversion tables result from rolls measurements at
FORCAST.
NOTE (f)
·
Symbol : HRc
·
HRc test is made under a total
load of 150 kgf with a 120° conical diamond penetrator.
·
Official standards : ASTM E18
(description, ...)
ASTM
E140 (conversion HRc - HV - HB - HSc).
NOTE (g)
·
Symbol : HB
·
BRINELL test is made under a load of 3000 kgf with a tungsten carbide ball diameter 10 mm.
·
Official standards : ASTM E10
(description, ...)
ASTM
E140 (conversion HRc - HV - HB - HSc).
NOTE (h et i)
·
Symbol : LD (tool in sintered carbide)
LE (tool in synthetic diamond).
·
Calibration : standards provided from the manufacturer
ASTM A956
official standard (description, precautions, ...). Preceding conversion refers
to handbook and conversion tables of the manufacturer (vertical impact).
Nevertheless, measures made on rolls in workshops show that there is a
considerable variation for high hardness levels (>600 HV).
ASTM A 370 Mechanical Testing of Steel Products