| Barrier Screw | ||||||||
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| We offer following specifications in bimetallic screws: | ||||||||
| BASE MATERIAL | ||||||||
| 42CrMo(AISI 4140) 38CrMoAIA(EN-41B) Stainless Steel SAE 304/316/410 Tool Steel AISI D2 |
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| DIMENSIONS | ||||||||
| Screw Diameter Maximum Screw Length(Single Part) Screw Straightness Screw Roughness |
10-200 mm 7000 mm 0.01 mm/m Ra 0.4 |
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| HEAT TREATMENT | ||||||||
| Hardening & Tempering(Toughening) | 285-345 HV (Hardness) | |||||||
| Stress Relieving | ||||||||
| Gas Nitriding |
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| Screw Coatings | ||||||||
| Type | Hardness | Thickness | Wear Resistance | Corrosion Resistance | ||||
| Hard Chrome | 800-1100HV | 0.02-0.05 mm | — | — | ||||
| Electroless Nickel | 500-800HV | 0.015-0.025 mm | — | — | ||||
| SCREW ARMOURING | ||||||||
| Type | Hardness | Coating Inlay | Wear Resistance | Corrosion Resistance | ||||
| Ni Based(colmonoy) | 52-58 HRC | 1.5-3 mm | — | — | ||||
| Co Based(stellite) | 55-62 HRC | 1.5-3 mm | — | — | ||||
| SCREW ENCAPSULATION | ||||||||
| Type | Hardness | Coating Inlay | Wear Resistance | Corrosion Resistance | ||||
| Tungsten Carbide(WC) | 68-72 HRC | 0.15-0.25 mm | — | — | ||||
| Chromium Carbide(CrC) | 62-64 HRC | 0.15-0.25 mm | — | — | ||||
| Tin Coating | 2300HV | 0.002-0.010 mm | — | — | ||||
Barrier Screw