Properties

КА 40

КA 35

Testing in accordanca with

КА 40-1

КА 40-2

КА 35-1

КА35-2

Typical place of installation

Oven walls heads
Regenerator
Regenerator
checkers

Ascension pipe
Oven roof

Al2O3

%

µG
σ

≥ 40
1.5

≥ 35
1.5

DIN 51 062 DIN 51 070
Part 2 e)

Fe2O3

%

µG
σ

≥ 2.0
0.5

≥ 2.5
0.5

Apparent porosity (Po)

%

µG
σ

≤ 20
2

≤ 24
2

≤ 19
2

≤ 24
2

DIN 51 056

Cold compressive strength (KDF)

N/mm2

µG
σ
χmin

≥ 35
10
25

≥ 30
10
20

≥ 30
10
20

≥ 30
10
20

DIN 51 067
Part 1

Refractoriness under load (DFB) initial temperature ta

⁰C

µG
σ

≥ 1,450
40

≥ 1,400
40

≥ 1,400
40

≥ 1,350
40

DIN 51 064

Refractoriness under load T0,5 °C (differential method)

⁰C

µG
σ

≥ 1,350
25

≥ 1,300
25

≥ 1,300
26

≥ 1,250
25

DIN 51 053
Part 1

Refractoriness 1)

SK

µG
σ

≥ 172/174 (SK 33)
4)
2 (SK 1)

-

DIN 51 063
Part 1

 Creep-in compression (DF1)

[Z₅-₂₅]

%

µG
σ

≤0,1
0,03

DIN 51 053
Part 2

%

µG
σ

≤0,25
0,1

Thermal shock resistance (TWB)

number of thermal cycles

as per mutual agreement