NR-85-95-110 boards are high density calcium silicate insulation boards which are designed specifically for use in aluminum casting and industrial structural insulation, the foundry and furnace industries, and other thermal processing applications.
North Refractories offers several grades and types of technically advanced calcium silicate boards for molten metal applications, these high performance and non-asbestos materials are available in sheets or as precision CNC machined components as per drawings, they are able to withstand a working temperature up to 1000 °C, thus it is really an ideal insulation material for contact with molten metals directly. These boards are in available with a bulk density of 850 or 1000 kg/m³ for an enhanced structural strength and dimensional stability.
| Items | Unit | NR‐60 | NR‐80 | NR‐85 | NR-85STEEL | NR-95 | NR‐110 |
| Density | Kg/m³ | 550 | 810 | 860 | 1000 | 950 | 1100 |
| Modulus of rupture | MPa | ≧3 | ≧8 | ≧7 | ≧12 | ≧7 | ≧14 |
| C.C.S | MPa | ≧6 | ≧16 | ≧14 | ≧19 | ≧17 | ≧20 |
| Thermal Conductivity Mean Temp. | W/m°K | ||||||
| 200°C | 0.09 | 0.09 | 0.14 | 0.14 | 0.13 | 0.15 | |
| 400℃ | 0.10 | 0.11 | 0.12 | 0.16 | 0.15 | 0.17 | |
| 800℃ | 0.12 | 0.15 | 0.16 | 0.25 | 0.22 | 0.25 | |
| Loss on ignition | % | <8 | <8 | <8 | <8 | <8 | <8 |
| Thermal shrinkage 12hr | 1000℃ | 1000℃ | 1000℃ | 1000℃ | 1000℃ | 1000℃ | |
| @ Length or Width | % | 0.2 | 0.20 | 0.2 | 0.4 | 0.4 | 0.40 |
| @ Thickness | % | 1.4 | 1.40 | 1.3 | 1.5 | 1.0 | 1.0 |
| Screw Holding Strength @ 22mm penetration | kg | 80 | 105 | 110 | 120 | 120 | 145 |
| Coefficient of Thermal Expansion | /℃ | 6.5*10-6 | 6.4*10-6 | 6.4*10-6 | 6.4*10-6 | 6.3*10-6 | 6.1*10-6 |
| Standard Sizes | 1200 X 600 mm , 1200 X 1200 mm , 2400 x 1200mm, 2520 x 1200mm | ||||||
| Available Thickness | 13, 19, 25, 27, 32, 38.1 44, 51.4, 63, 76.1, 101.6 | ||||||
| Advantages | Low thermal conductivity, Non‐wetting, Excellent mechanical strength, Asbestos free, easy to install, dimensional stability | ||||||
| Applications | • Dip tubes • Pouring spouts • Hot‐top rings • Stopper pins • End dams • Floats • Launders, Holding furnace insulation linings, ladle insulation boards. | ||||||
Note: The physical and chemical properties listed represent typical, average values obtained in accordance
with accepted test methods and are subject to normal manufacturing variations. They are supplied as a technical service and are subject to change without notice
High resistance to thermal shock;
Non-wetted by liquid non-ferrous metals;
Dimensionally stable;
Resistant to wear;
Non-reactive to lubricants such as boron nitride or graphite
Launders and dams
Billet and ingot casting
Low pressure die casting
Machined spouts (dip tubes)
Continuous sheet caster tips
Transition plates and headers
Orifice plates for horizontal casters
Trough liners
Insulated riser inserts
Continuous caster head boxes
Baffle plates
Holding Furnace linings
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