ASTM A48 Class 30: Norm Gray Cast Iron für Machine Werkzeug Frames
ASTM A48 · Published: 2026-06-03 · Updated: July 2026
ASTM A48 Class 30 gray cast iron is the most widely specified gray iron grade — the standard material for machine tool beds, engine blocks, brake rotors, and pump housings. Its graphite flake microstructure provides excellent vibration damping...
ASTM A48 Class 30 gray cast iron ist der meiste widely specified gray iron grade — der standard material für machine werkzeug beds, motor blocks, brake rotors, und pumpe housings. Sein graphite flake microstructure provides excellent vibration damping (~20× better als steel), gut thermal conductivity, und natural lubricity für sliding wear applications.
Quick Facts
| Kategorie | Cast Iron |
| Norm | ASTM A48 |
| Density | 7.20 g/cm³ |
| Yield Strength | N/A (brittle) |
| Tensile Strength | 207 MPa (30 ksi) |
Global Equivalents & Cross-Reference
Verwandt Materials
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Frequently Asked Questions
Warum sind machine werkzeug bases made von gray cast iron?
Gray iron's graphite flake structure converts vibrational energy in heat durch internal friction bei der graphite-matrix interface — providing damping capacity 10-20× higher als steel. Dies directly improves machining accuracy durch reducing chatter. Additionally, gray iron's niedrig melting point (1,150-1,250°C) und excellent fluidity enable casting von complex ribbed structures bei unter kosten als steel weldments.
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