Austempered Ductile Iron (ADI) Güte 1: Hoch-Strength Lightweight Cast Material
ASTM A897 · Published: 2026-06-03 · Updated: July 2026
Austempered Ductile Iron (ADI) is produced by austempering ductile iron — a specialized isothermal heat treatment that creates an ausferrite microstructure (acicular ferrite + carbon-stabilized austenite) with a unique combination of high...
Austempered Ductile Iron (ADI) ist produced durch austempering ductile iron — ein specialized isothermal heat treatment das creates ein ausferrite microstructure (acicular ferrite + carbon-stabilized austenite) mit ein unique combination von hoch strength, gut ductility (8%), und 10% unter density als steel. Es ist replacing forged steel in truck suspension components, gears, und crankshafts.
Quick Facts
| Kategorie | Cast Iron |
| Norm | ASTM A897 |
| Density | 7.10 g/cm³ |
| Yield Strength | 758 MPa (110 ksi) |
| Tensile Strength | 965 MPa (140 ksi) |
Global Equivalents & Cross-Reference
Verwandt Materials
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Frequently Asked Questions
Was makes ADI verschieden von standard ductile iron?
Norm ductile iron's matrix ist ferrite, pearlite, oder tempered martensite — alle well-understood phases. ADI's ausferrite microstructure ist unique zu austempered cast irons: der acicular ferrite provides strength while der stabilized austenite provides ductility und arbeiten-hardening capability. Der result ist ein material mit twice der strength von standard ductile iron bei der gleich ductility level.
References & International Standards
- ASTM International. Norm Specifications für Stahl & Metal Alloys. astm.org
- International Organization für Standardization (ISO). Metallic Materials — Cross-Referenz Database. iso.org
- American Iron und Stahl Institute (AISI). Stahl Güte Designations & Equivalents. steel.org
- European Committee für Standardization (CEN). EN Stahl Standards & Numbering System. cencenelec.eu