Mitutoyo BM1 Series - Material Properties and Performance

24
5Specications
No. 99MAK004B
Steel: Nominal size L 5 mm–100 mm, 0.2 in–4 in
Ceramics: Nominal size L 0.2 in–4 in
24.1±0.1
24.1±0.1
6.7±0.1
77±2°
Nominal size L
Steel: Nominal size L 125 mm–500 mm, 5 in–20 in
24.1±0.1
24.1±0.1
77±2°
(L x 0.211)
*3
(L x 0.211)
*3
6.7±0.1
Nominal size L
*3 The dimension from the end face to the
airy point
■ Material and properties
Material
Application
CERA Block
(Zirconia)
Steel
Tungsten
carbide
Zero
CERA Block
(Low thermal-ex-
pansion ceramics)
Hardness HV 1350 800 1650 826
Thermal expansion
coe󰀩cient
10
-6
/K 9.3±0.5 10.8±0.5 5.5±1.0 0±0.02
Flexural strength
(three points)
MPa 1270 1960 1960 210
Fracture toughness
(KIC)
MPa·m
1/2
7 120 12 1.2
Young's modulus
(×104)
MPa 20.6 20.6 61.8 130
Poisson's ratio 0.3 0.3 0.2 0.3
Specic gravity 6.0 7.8 14.8 2.5
Thermal conductivity W/m·k 2.9 54.4 79.5 3.7