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Properties

Grades

Testing in accordance with

KN

KD

KS

Typical place of installation

Regenerator
Oven walls
Oven roof

Chemical composition

Si02

%

µG
σ

≥94,5
1.0

1,0

DIN 51 070 Part 2 6)

AJ2O3₃

%

µG
σ

≤2,0
0,3

≤1,5 
0,3

DIN 51 070 Part38)

Fe2O3

%

µG
σ

≤1,0
0,2

≤1,0
0,2

DIN 51 070 Parts6)

CaO

%

µG
σ

≤3,0
0,35

≤3,0
0,35

DIN 51 070 Part 7 s)

Na2O+K2O

%

µG
σ

≤0,35
0,02

≤0,35
0,02

DIN 51 070 Parts8)

Residual quartz content

Raw material type a (coarse crystalline)

%

µG
σ
χmax

as per mutual agreement
6,0

-2

Raw material type В (crypto crystalline)

%

Ts
σ

1,5
0,5

Cold compressive strength (KDF)

N/mm2

µG
σ
χmin

≥28  2)
10
20   2)

≥35
10
29

≥45
10
30

DIN 51 067 Part1

Apparent porosity (Po)

%

µG
σ

≤24,5
1,3

≤22,0
1,3

≤22,0
1,3

DIN 51 056

Refractoriness under load (DFB)
Initial temperature tₐ

⁰C

µG
σ

≥C 1640
25

≥1650
25

DIN 51 064

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

⁰C

µG
σ

as per mutual agreement

DIN 51 053 Part1

Creep-in compression (DFI)3)

[Z₅₋₂₅]

%

µG
σ

≤0,12
0,05

-

DIN 51 053 Part 2

[Z₂₅]

µG
σ

≤0,35
0,1

-

Refractoriness

SK

µG
σ

≥170(31)4)
2 (1)4

-

-

DIN 51 053 Part1

Abrasion acc. To Bohme
Mean thickness loss Δ t

mm

µG
σ

-

-

≤ 4,5
1,0

DIN 52 108