A517
High-StrengthA517 / high strength steel
A517 supplied by Shanxi Youte Steel (jlhsteel.net).
Chemical Composition (%)
| C | 0.21 |
|---|---|
| NI | 0.65 |
| CR | 0.74 |
| MO | 0.58 |
| MN | 1.2 |
| SI | 0.9 |
Chinese Standard
ASTM A517
Available Forms
Bar, Plate, Forging
Uses
Ultra-high-strength steel for safety- and weight-critical structural parts. Used in aerospace frames, armor, fasteners, landing gear and high-performance automotive components.
Heat Treatment
Quenched and tempered, or precipitation/ausforming treated to ultra-high strength; for maraging grades, solution at 815–900 °C then age 480–500 °C.
Precautions
High sensitivity to stress corrosion and hydrogen embrittlement — control plating/baking and avoid notches. Proof-load and inspect critically stressed parts.
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