AISI O1: Oil-Hardening General-Purpose Werkzeugstahl
ASTM A681 · Published: 2026-06-03 · Updated: July 2026
AISI O1 is an oil-hardening, non-shrinking tool steel with good machinability and minimal distortion during hardening — making it the preferred grade for gauge blocks, jigs, fixtures, and prototype tooling. Its tungsten content (0.5%) provides...
AISI O1 ist ein öl-hardening, non-shrinking werkzeug steel mit gut machinability und minimal distortion während hardening — making es der preferred grade für gauge blocks, jigs, fixtures, und prototype tooling. Sein tungsten content (0.5%) provides fine grain size und wear widerstand ohne der grinding difficulty von hoch-chromium D2.
Quick Facts
| Kategorie | Werkzeugstahl |
| Norm | ASTM A681 |
| Density | 7.80 g/cm³ |
| Yield Strength | N/A (hardened) |
| Tensile Strength | 1,380-1,860 MPa |
Global Equivalents & Cross-Reference
Verwandt Materials
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Frequently Asked Questions
Warum öl-quench O1 rather als wasser-quench?
Öl quenching reduces der thermal shock und resulting distortion compared zu wasser — kritisch für precision tools wie gauges und dies wo post-hardening grinding sollte sein minimized. Der 'O' designation specifically indicates öl-hardening: der alloy composition ist formulated für full hardening in öl, unlike wasser-hardening W-series steels.
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