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Soft Bricks , Insulating Firebrick, IFB

BNZ Materials Refractories

by BNZ Materials Refractories : Made in USA !!

BNZ Insulating Fire BrickWe offer high quality, American Made BNZ soft insulating fire bricks.

The prices shown for individual IFB bricks are for smaller quantities (fewer than 500) shipping from our Sheffield MA warehouse and for in-store pick-up.
Larger quantities which will ship on pallets direct ex-works carry significant discounts so please call or email for a quote.
We carry three temperature ratings (2300, 2600, and 2800 degree) and two grades : PA and BNZ grades
The 2300 degree soft insulating fire bricks are available in the PA grade.
The 2600 and the 2800 degree rated IFB bricks are available in the excellent but economical PA grade or the high grade BNZ grade.

IFB (Insulating fire bricks) also known as Soft Bricks are high temperature, lightweight refractories which are used as insulation in kilns, forges and furnaces. Many furnaces and kilns will require a combination of Soft Brick and Dense firebrick. We also stock castable dense and insulating refractories (Litewate and Loucast). Casatable refractories are great problem solvers whether constructing or repairing. We stock insulating Kaowool blanket and insulating high temp board as well as mortar and kiln cement.

Gas and electric powered kilns and furnaces can use the soft insulating fire brick in the firebox.
Wood and oil burning kilns are constructed with hard-brick (dense firebrick.) They are then insulated with these IFB. Salt kilns and other applications which create corrosive atmosphere will also need to use dense firebrick (hard brick) in the firebox and use the IFB outside. Coal burning power plants often use specialized brick such as Silicon Carbide brick to resist the abrasive atmospheres there.

Picking the correct IFB bricks and other refractories for your application is crucial, so please email us or call to let us help you pick the correct refractories for your project or repair.

From a back yard forge or oven to full scale coal burning power pants Sheffield Pottery has the materials you need!

Sheffield bricks and refractories are used in salt kilns, train kilns, tunnel kilns, Anagama kilns, gas kilns, furnaces, and ovens coast to coast.

Call today to get started with your build or repair.

Refractory shapes include precast cement and fused or sintered refractory products that are formed prior to installation in furnaces, boilers or other high temperature equipment. Refractories are hard, heat resistant materials and products such as alumina, silicon carbide, fire clay, bricks, precast shapes, cement or monolithics and ceramic kiln furniture. Ceramics and refractories have high melting points are suitable for applications requiring wear resistance, high temperature strength, electrical or thermal insulation or other specialized characteristics.

Refractory bricks, blocks, and tiles are stacked to form insulating furnaces, boilers or other thermal process vessel walls. The soft bricks are usually cemented together with refractory mortar.

Please note:

Most kilns, ovens and furnaces utilize a combination of several types of fire-brick and refractories.
Feel free to email or give us a call if you need help selecting the correct bricks for your application.

Please note:
BRICKS SHIPPED UPS GROUND CARRY A $0.75 /BRICK PACKING FEE AND A $5.00 MINIMUM PACKING FEE.

  • Bricks carry a $0.75 per brick double box safe packing fee when going UPS.
  • There is a $5.00 minimum on this packing fee.
  • ie. 1-6 bricks carry a flat $5.00 packing fee. Add $0.75 per brick for 7+ bricks.
  • NOTE: This does not apply to large quantities of bricks which ship palletized via our truck or common carrier.

    • Call to special order any firebrick sizes not shown. Discounts are available when ordering 500 or more fire bricks.
INSULATING BRICKS/SOFT BRICKS 2 1/2”
CHOOSE SOFT BRICKS FOR INDOOR OR WELL COVERED AREAS
Note: Soft bricks can be cut down with an ordinary carpenter's hand saw to create custom shapes where you need them.
Discounts will be applied to orders of over 500 bricks according to schedule below:
ITEM CODE BRICK <500 >500 Call for 500 brick Discounts
STRAIGHTS 9” X 4 1/2” X 2 1/2”
NC20 G-20
NC23 G-23
NC26 G-26
NC28 G-28
WEDGES AND ARCHES** Call for 500 brick Discounts
NC20W/NC20A G-20
NC23W/NC23A G-23
NC26W/NC26A G-26
NC28W/NC28A G-28

SOFT BRICKS 3”
STRAIGHTS 9” X 4 1/2” X 3”
NC203 G-20-3
NC233 G-23-3 Call for 500 brick Discounts
NC263 G-26-3
NC283 G-28-3
WEDGES AND ARCHES**
NC203W/NC203A G-20-3
NC233W/NC233A G-23-3 Call for 500 brick Discounts
NC263W/NC263A G-26-3
NC283W/NC283A G-28-3
** Wedges and Arches must be specified by number.





Insulating Firebrick Technical Data Data Updated 05/10/06
Typical Data
STANDARD ASTM C 155 GRADES
Grade
NC-20
NC-23
NC-26
NC-28
Temperature Use Limit
(normal oxidizing atmosphere)
°F
2000
2300
2600
2800
Density, Avg.
ASTM C 134
lb/ft3
35
36
46
55
lb/BEq
2.0
2.1
2.7
3.2
Modulus of Rupture
ASTM C 133
lb/in2
90
110
175
210
Cold Crushing Strength
ASTM C 133
lb/in2
105
145
220
250
Permanent Linear Change
ASTM C 210
%

24 hrs at soaking temp: °F

1950

0.0

2250

0.0

2450

2550

-0.6

2750

-1.6
2950
Thermal Conductivity
ASTM C 182
Btu-in/ft2, °F

Temperature: °F

500

1.3
1.3
1.7
2.0

1000

1.4
1.4
1.8
2.2

1500

1.6
1.6
1.9
2.3

2000

n/a
1.8
2.1
2.5

Chemical Analysis
ASTM C 182

%

Alumina - Al2O3

32.1
32.1
35.4
46.8

Silica - SiO2

64.3
64.3
61.2
50.9

Ferris Oxide - Fe2O3

0.9
0.9
0.9
0.8

Titanium Oxide - TiO2

1.7
1.7
1.6
1.7

Calcium Oxide - CaO

0.1
0.1
0.1
0.1

Magnesium Oxide - MgO

0.2
0.2
0.1
0.1

Alkalies, as Na2O & K2O

0.7
0.7
0.7
0.4



Note: there are no drawings of the 3 inch series bricks so here are the dimensions:
3 inch brick dimensions



SOFT BRICKS

TEMP--->


G20/

2000

G23/

2300

G26/

2600

G28/

2800

Shape

Size in Inches






Straits
 		2.5

NC23 NC26 NC28
3

NC233 NC263 NC283
Wedge #1
 		2.5
NC20W1 NC23W1 NC26W1 NC28W1
3
NC203W1 NC233W1 NC263W1 NC283W1
Arch #1
 		2.5
NC20A1 NC23A1 NC26A1 NC28A1
3
NC203A1 NC233A1 NC263A1 NC283A1
Arch #2
 		2.5
NC20A2 NC23A2 NC26A2 NC28A2
3
NC203A2 NC233A2 NC263A2 NC283A2
Arch #3
 		2.5




3




Soaps
 		2.5




3




Side Skews
 		2.5




3




Feather Edge

 		2.5




3




Splits

 		2.5




3




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NC23: G-23 SOFTBRICK-STRAIGHTS NC233: G-23 SOFTBRICK STRAIGHTS-3" NC26: G-26 SOFTBRICK STRAIGHTS
NC23: G-23 SOFTBRICK-STRAIGHTS NC233: G-23 SOFTBRICK STRAIGHTS-3" NC26: G-26 SOFTBRICK STRAIGHTS
NC263: G-26 SOFTBRICK STRAIGHTS 3" NC23A1: G-23 SOFTBRICK ARCHES #1 NC23A2: G-23 SOFTBRICK ARCH #2
G-23 Soft-brick Arch #2
Our Price: $5.17
NC263: G-26 SOFTBRICK STRAIGHTS 3" NC23A1: G-23 SOFTBRICK ARCHES #1 NC23A2: G-23 SOFTBRICK ARCH #2
NC23W1: G-23 SOFTBRICK WEDGES #1 NC26A1: G-26 SOFTBRICK ARCHES #1 NC26A2: G-26 SOFTBRICK ARCH #2
G-26 Softbrick Arch #2
Our Price: $5.45
NC23W1: G-23 SOFTBRICK WEDGES #1 NC26A1: G-26 SOFTBRICK ARCHES #1 NC26A2: G-26 SOFTBRICK ARCH #2
NC26W1: G-26 SOFTBRICK WEDGES #1 NC233A1: G-23 SOFTBRICK ARCH 3" #1 NC233A2: G-23SOFTBRICK ARCHES 3" #2
NC26W1: G-26 SOFTBRICK WEDGES #1 NC233A1: G-23 SOFTBRICK ARCH 3" #1 NC233A2: G-23SOFTBRICK ARCHES 3" #2
NC233W1: G-23 SOFTBRICK WEDGE 3" #1 NC28: G-28 SOFTBRICK STRAIGHTS NC263A1: G-26 SOFTBRICK ARCH 3" #1
NC233W1: G-23 SOFTBRICK WEDGE 3" #1 NC28: G-28 SOFTBRICK STRAIGHTS NC263A1: G-26 SOFTBRICK ARCH 3" #1
NC263A2: G-26 SOFTBRICK ARCHES 3" #2 NC263W1: G-26 SOFTBRICK WEDGE 3" #1 NC28A1: G-28 SOFTBRICK ARCH #1
G-28 Softbrick Arch #1
Our Price: $6.65
NC263A2: G-26 SOFTBRICK ARCHES 3" #2 NC263W1: G-26 SOFTBRICK WEDGE 3" #1 NC28A1: G-28 SOFTBRICK ARCH #1
NC28A2: G-28 SOFTBRICK ARCH #2 NC28W1: G-28 SOFTBRICK WEDGE #1 NC283: G-28 SOFTBRICK STRAIGHTS 3"
G-28 Softbrick Arch #2
Our Price: $6.65
G-28 Softbrick Wedge #1
Our Price: $6.65
NC28A2: G-28 SOFTBRICK ARCH #2 NC28W1: G-28 SOFTBRICK WEDGE #1 NC283: G-28 SOFTBRICK STRAIGHTS 3"
NC283A1: G-28 SOFTBRICK ARCHES 3" #1 NC283A2: G-28 SOFTBRICK ARCHES 3" #2 NC283W1: G-28 SOFTBRICK WEDGE 3" #1
NC283A1: G-28 SOFTBRICK ARCHES 3" #1 NC283A2: G-28 SOFTBRICK ARCHES 3" #2 NC283W1: G-28 SOFTBRICK WEDGE 3" #1
G-23 Softbrick Straights-3" : 10 Pack : Delivered Price
G-23 Softbrick Straights-3" : 10 Pack : Delivered Price
   
 
Soft Bricks or Insulating Firebrick from Sheffield Pottery Ceramic Supply