AMS 6585

Alloy Steel

AMS 6585

SAE-AMS aerospace steel specification AMS 6585.

Chemical Composition (%)

C0.2
NI1
CR0.5
MO0.15
V0.05
P0.03
S0.03

Applications

International high-end steel grade for aerospace, oil & gas, defense or engineering machinery.

Available Forms

Bar, plate, sheet, tube, forgings, strip, wire, powder

Uses

Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈1.25%) improves hardenability, wear and corrosion resistance. Molybdenum (≈0.375%) raises high-temperature strength and prevents temper embrittlement. Nickel (≈2.75%) increases toughness and impact strength at low temperature. Vanadium (≈0.125%) refines grain and strengthens the tempered structure. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.

Heat Treatment

Austenitize at 820–870 °C (oil or water quench depending on section) and temper at 400–650 °C to the required strength/toughness balance.

Precautions

Preheat and control interpass temperature when welding; post-weld heat treatment or stress relief is recommended to avoid hard-zone cracking. Use low-hydrogen electrodes. Protect from decarburization during heating (controlled atmosphere or protective coating).

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