20C
Nominal chemical composition, %
| C | And | Mn | Cr | In | For |
|---|---|---|---|---|---|
| 1.00 | 0.25 | 0.45 | - | - | - |
Main mechanical properties
expressed in MPa (nominal values at 20°C; tolerance ±100 MPa)
| Material | Breaking load Rm | Yield strength Rp0.2% | Elastic limit 0.01% | Module E | Module G | Stretching | Maximum serving temperature |
|---|---|---|---|---|---|---|---|
| ALLEIMA/SANDVIK 20C SHT | 1600÷2100* | 1450÷1900* | 1350÷1650* | 210.000 | 80.000 | - | 100 °C |
| ALLEIMA/SANDVIK SVC FLAPS | 1650÷2100* | 1450÷1900* | 1350÷1650* | 210.000 | 80.000 | - | 100 °C |
* mechanical properties decrease as thickness increases, and vice versa.
Description and uses:
20C SHT
Unalloyed carbon steel, tempered and tempered, ensures good fatigue and wear resistance properties, hardness combined with ductility, good surface finish and absence of dimensional defects.
Unalloyed carbon steel, tempered and tempered, ensures good fatigue and wear resistance properties, hardness combined with ductility, good surface finish and absence of dimensional defects.
20C SVC Flapper
Unalloyed carbon steel, tempered and tempered, is chemically and mechanically similar to 20C SHT, but is specifically developed and manufactured for compressor valves. This specification guarantees high mechanical properties, excellent surface finish, excellent flatness, low levels of non-metallic inclusions, very high fatigue strength under impact and bending stress, and good wear resistance.
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Unalloyed carbon steel, tempered and tempered, is chemically and mechanically similar to 20C SHT, but is specifically developed and manufactured for compressor valves. This specification guarantees high mechanical properties, excellent surface finish, excellent flatness, low levels of non-metallic inclusions, very high fatigue strength under impact and bending stress, and good wear resistance.
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