Insulating Firebrick

PA Grade IFB

The PA Grade of insulating fire brick (IFB) adds a lower cost alternative to BNZ’s traditional line of IFB. The PA series is designed for applications where the lower density and finer texture of the standard BNZ grades is not required. They meet or exceed the specifications of ASTM C 155 for each listed grade, and are produced under BNZ’s certified ISO 9001 Quality System.

Insulating Fire Brick Plant Location

Zelienople
191 Front Street
Zelienople, PA 16063
Phone: 724-452-8650 2550 (1399)
800-955-8650
FAX: 724-452-1346

[16x16-pdf_icon download the PA data sheet]
[16x16-pdf_icon download the PA SDS]


PA 20

PA-20 is a low density brick suitable for applications where low conductivity and low thermal mass are required. Typical applications are batch furnaces and low temperature shuttle kilns where minimum heat storage is important.

PA 23

PA-23 features higher cold crushing strength than the PA-20. With its low reheat shrinkage, it is especially well suited for applications such as annealing and reheating furnaces

PA 26

PA-26 blends excellent density, strength and temperature stability with low conductivity, making it ideal as backup insulation in reheat and forge furnaces.

Typical Data PA SERIES
PA 20 PA 23 PA 26
ASTM Classification 20 23 26
Temperature Use Limit °F
°
C
2000 2300 2600
    (Normal oxidizing atmosphere) (1093) (1260) (1427)
Density
ASTM C 134
lb/ft²
kg/m³
lb/BEq
39
(625)
2.3
44
(705)
2.6
49
(785)
2.5
Modulus of Rupture
ASTM C 133
psi
kg/cm²
85
(6.0)
115
(8.0)
180
(12.0)
Cold Crushing of Strength
ASTM C 133
psi
kg/cm²
95
(7.0)
140
(10.0)
240
(17.0)
Permanent Linear Change %
    ASTM C 210
    24 hrs at soaking temp: °F (°C)
    2250 (1232) -0.0 -0.0
   2550 (1399) -0.9
Reversible Linear Thermal Expansion
    at 2000°F (1093°C)
% 0.06 0.06 0.6
Hot Load Strength %
    ASTM C 16 deformation
    10 psi load for 11/2 hours: °F (°C)
   2000 (1093) -0.5 -0.5
    2200 (1204) -0.2
Maximum Mean Temperature °F 1800 2100 2200
Thermal Conductivity Btu-in/ft², hr, °F
    ASTM C 182 (W/mk)
    Mean temperature, °F (°C)
      500 (260) 1.4 (0.20) 1.6 (0.23) 2.1 (0.30)
    1000 (538) 1.8 (0.26) 2.0 (0.29) 2.4 (0.35)
    1500 (816) 2.2 (0.32) 2.4 (0.35) 2.7 (0.39)
     2000 (1093) 2.4 (0.35) 2.6 (0.37) 2.9 (0.42)
     To convert Btu-in/ft², hr, °F to Kcal-m², hr, °C,
multiply by 0.124.
Chemical Analysis
    Alumina – Al2O3 42.5 42.5 40.1
    Silica – SiO2 51.5 51.5 57.0
    Ferric Oxide – Fe2O3 0.7 0.7 0.7
    Titanium Oxide – Ti2O2 1.5 1.5 1.5
    Calcium Oxide – CaO 2.5 2.5 0.3
    Magnesium Oxide – MgO 0.1 0.1 0.1
    Alkalies, as Na2O & K2O 1.0 1.0 0.4

Disclaimer:

BNZ Materials warrants that its products are manufactured in accordance with its applicable material specifications and are free from defects in workmanship and materials using BNZ’s specifications as a standard. Every claim under this warranty shall be deemed waived unless in writing and received by BNZ within thirty (30) days of the date the defect was discovered and within one (1) year of the date of the shipment of the product.
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