ALTRA® KVS AND KVR HIGH-DENSITY

ALTRA® KVS AND KVR HIGH-DENSITY VACUUM-FORMED BOARDS

ALTRA® high-density vacuum-formed board products are available in formulations for service temperatures up to 1800°C. ALTRA® high-density boards are available for high-temperature, oxidizing environments (KVS) and high-temperature, reducing environments (KVR). ALTRA® boards are formed from alumina or mullite polycrystalline fibers with appropriate inorganic and organic binders. All grades are pre-fired to 1000°C or greater, resulting in an organic-free composition. Possible applications include furnace hearth plates and low mass sintering setters.

 

ALTRA® HIGH-DENSITY VACUUM-FORMED BOARDS
Properties Units ALTRA® GRADE
KVS 174/700 KVS 184/700 KVR 164/702
Classification
Temperature

Service
Temperature
°F
°C

°F
°C
3092
1700

3092
1700
3272
1800

3272
1800
2912
1600

2822
1550
Density lbs/ft³
(kg/m³)
45
700
45
700
45
700
Linear Shrinkage
24 hrs @ Temperature
“+” indicates growth
% 0.5@1700°C
0.7@1750°C
0.1@1700°C
0.2@1750°C
0.7@1800°C
1.0@1500°C
Thermal Conductivity
Hot Wire Method

392°F (200°C)

752°F (400°C)

1112°F (600°C)

1472°F (800°C)

1832°F (1000°C)

2192°F (1200°C)

2552°F (1400°C)


BTUin/hrft² °F
(W/mK)


1.11(0.16)
1.32(0.19)
NA
NA
2.29(0.33)
2.43(0.35)
NA


1.04(0.15)
1.18(0.17)
1.32(0.19)
1.52(0.22)
1.80(0.26)
1.94(0.28)
2.15(0.31)


1.45(0.21)
1.52(0.22)
1.66(0.24)
1.80(0.26)
1.94(0.28)
2.08(0.30)
2.21(0.32)
Chemical Composition

Al2O3

SiO2


%

86
14

82
18

>96
<4
Fiber Type   Mullite Mullite Alumina


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