품종(Brand)
항목 (Properties)
H-S H-1 H-2 H-3 H-4
내화도(SK)
Refractoriness		 39 38 37 36 35
겉보기기공율(%)
Apparent Porosity		 24 24 24 25 26
부피비중
Bulk Density		 2.5 2.4 2.4 2.25 2.15
압축강도(kg/㎠)
Cold Crushing Strength		 350≤ 300≤ 350≤ 250≤ 200≤
하중연화점(2kg/㎠, T2, ℃)
Refractoriness under Load		 1,700 1,550 1,480 1,450 1,400
잔존선팽창수축율(%)
at1,500℃×2hr
Permanent Linear Change		 ±0.3 ±0.3 ±0.3 ±0.3 ±0.3
열간성팽창율(%) at1,000℃
Thermal Expansion		 0.70 0.70 0.60 0.60 0.50
화학성분(%)
Chemical Composition		 Al2O3
SiO2		 80≤
2.0≥		 70≤
2.0≥
 60≤
2.0≥		 50≤
2.0≥		 45≤
2.0≥
특성 Cheracteristics 내 Spalling성
특기사항 한국공업규격 Brick
 
 
품종(Brand)
항목 (Properties)
N1-1 N1-2 N2-1 N2-2 N3-1 N3-2 N4-1 N4-2 N5
내화도(SK)
Refractoriness		 34 34 33 33 32 32 31 31 30
겉보기기공율(%)
Apparent Porosity		 24 28 24 28 24 28 26 28 26
부피비중
Bulk Density		 2.1 2.0 2.1 2.0 1.95 1.95 1.95 1.95 1.85
압축강도(kg/㎠)
Cold Crushing Strength		 200≤ 150≤ 200≤ 150≤ 200≤ 150≤ 200≤ 150≤ 200≤
하중연화점(2kg/㎠, T2, ℃)
Refractoriness under Load		 1,350 1,300 1,350 1,300 1,350 1,280 1,300 1,280 1,280
잔존선팽창수축율(%)
at1,350℃×2hr
Permanent Linear Change		 1,400℃×2hrs
+0.1~-0.5		 1,400℃×2hrs
+0.1~-0.5		 +0.1~-0.6 +0.1~-0.6 ±0.5 ±0.5 ±0.5 ±0.5 ±0.5
열간성팽창율(%) at1,000℃
Thermal Expansion		 0.50 0.50 0.50 0.50 0.50 0.50 0.50 0.50 0.50
화학성분(%)
Chemical Composition		 Al2O3
SiO2		 38≤
3.0≥		 38≤
3.0≥
 33≤
3.0≥		 33≤
3.0≥		 30≤
3.0≥		 30≤
3.0≥		 28≤
3.0≥		 28≤
3.0≥		 26≤
3.0≥
특기사항 한국공업규격 Brick