Reference Gauge
Standard Hardness Block เหล็กมาตรฐานสำ �หรับทดสอบความแข็ง
Variation (R=Max. • Min.)
Material (JIS notation)
Dimension (mm) Ø25 x 5 ※ Ø25 x 6 (2) Ø25 x 5 ※ Ø25 x 5 (0.5)
Finished Suface
Standard based JIS B 7735 “ “ JIS B 7735 “ “ JIS B 7731 “ JIS B 7731 Related JIS B 7730 “ JIS B 7730
Assortment
Hardness Value
Torelance Calibration number (n)
900, 800, 700, 600, 500, 400, 300, 200 (Be Copper) 100 (C2600P), 40 (C1020P)
HMV (1, 0.1, 0.01) “ “ HMV(0.2,0.05,0.01)
±15 ±15 ±10 ±10 ±15 “ ±10
6 (4x2) “ “
5% (HV0.1) “ 9 (HV0.1)
SK5 C1720P ←
□ □ □ □ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ △ △ ○ ○ ○ ○ ● ● ● ●
30 (Glod)
“
6 (HV0.2)
Au
1.5% “ (150V and below 2.2%)
1000 (SK2), 900, 800, 700, 600, 500, 400, 300, 200 (SK5), 15 (S45C) 100 (C2600P), 40 (C1020P)
HV (30, 1) HV (10, 1) “
10 (5x2) / 30, 10 6 (3x2) / 1
SKS3 ← ←
Ø64 x 15 “ Ø64 x 10 Ø64 x 15 “ Ø115 x 33 “ Ø64 x 15 “
100 (SK2), 95, 90, 80, 70, 60, 50, 40, 30, 20 (S20C), 7 (1020PØ64x10) HLE (Dia) 850, 800, 700, 600, 500, HLD (WC) 880, 830, 730, 630, 520 70 (SK2), 967, 64, 62, 60, 57, 55, 50, 45, 40, 35, 30, 25, 20, 10 87, 85, 78, 73, 67, 60, 55, 50, 41
±2 “
HV10 (5x2) HS10 (5x2)
SK5 ← SK5 “
HS
3% (HV0.3)
R VHS ≦ 1.5 (70HS and below 1.2) HS (HS-VHS ≦ 0.5
±15 “
HL (Leeb)
(HV Calibration)
±1 “
10 (5x2) “
SKS3 SK5
HR C
0.2 (40RC and below 0.3)
HR A
“
“
Same as HRC Ø64 x 15
HR 30N HR 15N
83, 81, 78, 73, 67, 60, 55, 50, 41
“ “
“ “
0.3 0.6
“ “
“ “
“ “
92, 90, 87, 85, 80, 75
0.8 (50RB and below 1.0)
±2 “
10 (5x2) “
SK5 C2600P
Ø64 x 10 “
JIS B 7730 “
HR B
100, 95, 90, 82, 72, 62, 52, 42, 32
HR 30T HR 15T
78, 72, 62, 52, 42, 38, 32
“ “ “ “ “ “ “
“ “ “ “ “ “ “
1.0
Same as HRB
“ “ “ “ “ “ “
“ “
87, 82, 78
“ “ “
“
JIS B 7202
HR (E • M • L • R)
HRE 90 HRM 107 HRL 118 HRR 123
(100HV) (40HV)
“
“
HRM 67 HRL 92 HRR 105 600, 550, 450, 400, 250
JIS B 7736
HBW (10/3000)
±15
6 (3x2)
1.5% “ 2.5% 3%
SK5
Ø115 x 18
300, 250, 229 (d=4mm), 200, 180 HB (10/3000 150, HB (10/500) 125 HB (10/500) 100
“ S45C S10C
“ “ “
HB (10/3000)
Finished test surface ; ○ Buffing, △ Plate lapping, □ Super, ● Fine grinding
JSR Entech Catalogue 229 jetco@jet.co.th
jet@jet.co.th
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