AMS 5529 stainless steel plate, made from 17-7PH (UNS S17700), is a high-performance precipitation-hardening stainless steel that has become a preferred material in the aerospace industry. It offers a rare combination of high strength, corrosion resistance, and thermal stability, making it ideal for demanding environments such as aircraft structures, landing gear components, and spring systems.
AMS 5529 is a specification established by SAE International for annealed (Condition A) 17-7PH stainless steel sheets and plates. This material is primarily used when high mechanical strength and good corrosion resistance are required after simple heat treatments. It can be further aged to Condition RH950 or CH900 to achieve extremely high strength.
| Element | Content |
|---|---|
| Chromium (Cr) | 16.0 – 18.0% |
| Nickel (Ni) | 6.5 – 7.8% |
| Aluminum (Al) | 0.75 – 1.50% |
| Manganese (Mn) | ≤ 1.0% |
| Carbon (C) | ≤ 0.09% |
| Phosphorus (P) | ≤ 0.04% |
| Sulfur (S) | ≤ 0.03% |
| Property | RH950 Condition |
|---|---|
| Tensile Strength | ≥ 1310 MPa |
| Yield Strength (0.2%) | ≥ 1170 MPa |
| Elongation | ≥ 5% |
| Hardness | 38 – 45 HRC |
These properties make it ideal for weight-sensitive aerospace structures requiring high fatigue resistance and dimensional stability under stress.
✅ Excellent Strength-to-Weight Ratio
✅ Good Resistance to Corrosion and Oxidation
✅ Superior Fatigue Resistance in Harsh Conditions
✅ Excellent Formability in Condition A (Annealed)
✅ No Oil Quenching Required – Simple Aging Treatments
Aircraft structural supports and frames
Engine parts and heat shields
Precision springs and fasteners
Satellite components
Missile systems and defense structures
While SUS631 is the Japanese designation of 17-7PH, AMS 5529 ensures the material complies with strict U.S. aerospace industry standards, particularly in heat treatment, surface finish, and mechanical performance.
GNEE is a trusted global supplier of aerospace-grade stainless steel plates, including AMS 5529 17-7PH. We offer:
✅ Mill-certified material with full traceability
✅ Cut-to-size services
✅ Heat treatment to RH950 / CH900 upon request
✅ Export-ready packaging and worldwide logistics
✅ MTC, EN10204 3.1, and RoHS documentation support
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