AerMet 490
SuperalloyAerMet 490
Ultra-high-strength cobalt-alloy steel for extreme-service parts.
Chemical Composition (%)
| C | 0.28 |
|---|---|
| NI | 8.5 |
| CO | 16 |
| CR | 3.5 |
| MO | 1.5 |
| P | 0.01 |
| S | 0.008 |
Applications
High-end / niche grade used in aerospace, defense, tooling, bearing, gear or heavy shaft applications.
Available Forms
Bar, plate, sheet, tube, forgings, strip, wire, powder
Uses
Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.
Heat Treatment
Austenitize at 760–820 °C and quench (oil/water) then temper at 150–400 °C for high hardness; spheroidize anneal (680–720 °C) improves machinability of the as-rolled bar.
Precautions
Weldable with standard procedures; preheat may be needed for thick sections or higher-carbon/ alloy grades. Protect from decarburization during heating (controlled atmosphere or protective coating).
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