Stainless Steel 303PH AMS 5735

AMS 5735 was the aerospace material specification covering A286 stainless steel (UNS S66286) bars, forgings, tubing and rings, solution treated at 1800°F (982°C) and precipitation heat treated. SAE has since withdrawn it, but it still appears on older engine and airframe drawings.

What defines AMS 5735 today is that it’s a legacy callout. Its 1800°F solution-and-aged condition now lives in AMS 5732, which adds consumable-electrode melting for cleaner, more consistent material. If you’re buying against an older drawing or purchase order that lists AMS 5735, the usual route is to source AMS 5732 and get your engineering or quality team to approve the substitution in writing.

Where you’ll still see AMS 5735 called out:

• Legacy turbine engine spares and overhaul parts
• Older airframe hot-section fittings and bolts
• Repair and replacement hardware built to original drawings

For the current equivalent, see AMS 5732. Full composition and properties are on the A286 stainless steel page. Tech Steel & Materials can help you source A286 for legacy AMS 5735 callouts. Request a quote and we’ll confirm the right current certification for your part.