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Steel-frame jointing sheet series
Produced by cementing, rolling and antiseize-processing spurt metal-core sheet, two-side complex fiber sheet or graphite paper. According to different surface compound materials of spurt metal-core sheet, there are asbestos steel-frame jointing sheet, asbestos-free steel-frame jointing sheet and graphite steel-frame jointing sheet. The main ingredient of asbestos series is asbestos-mine fiber. Its thermostability and mechanical strength are stronger than organic fiber. The main ingredient in asbestos-free series is aramid fiber and inorganic fiber. The thermostability and mechanical strength are weaker than asbestos but compactness is better than asbestos. And it is a kind of environment-friendly sealing material. The surface main ingredient in graphite series is graphite paper. Its thermostability is 600℃, and it is suitable for high-temperature sealing. |
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Item / Type
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Technical indexes
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Asbestos |
Asbestos-free
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Graphite
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Thickness
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mm |
1.0~2.0 |
1.0~2.0 |
1.0~2.0 |
Density
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g/cm3 |
1.7-2.0 |
1.4-1.8 |
0.8-1.5 |
Compressibility
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% |
8-18 |
10-20 |
16-30 |
Recovery
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% |
≥45 |
≥40 |
≥25 |
Stress relaxation
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% |
≤25 |
≤25 |
≤30 |
Liquid-resistant |
Immerse 20# oil for 5 hours at RT
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Thickness increase % |
≤15 |
≤15 |
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Weight increase % |
≤35 |
≤35 |
≤20 |
Immerse 75# fuel oil for 5 hours at RT |
Thickness increase % |
≤15 |
≤20 |
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Weight increase % |
≤35 |
≤35 |
≤20 |
Immerse Ethanol: water 1:1 for 5 hours at 130oC
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Thickness increase % |
≤25 |
≤25 |
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Weight increase % |
≤40 |
≤30 |
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Scope of application: cylinder head gasket, exhaust gasket, and chemical pipe, flange, pumps sealing
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