AM 350® - AMS 5525 - UNS S35000
AM350® is a precipitation‑hardening martensitic stainless steel engineered for applications requiring high strength, excellent fatigue resistance, and reliable corrosion performance. Through solution treatment, conditioning, and aging, AM350® delivers a versatile range of mechanical properties while maintaining dimensional stability and toughness across demanding service environments. It offers significantly higher strength than austenitic stainless steels and improved corrosion resistance compared to conventional martensitic grades, making it well suited for aerospace, defense, industrial, energy, and transportation applications where long‑term durability and performance are critical.
AM 350® Inventory Size Ranges
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Standard Inventory Specifications
- AMS 5525
- ASTM A693
- UNS S35000
Common Trade Names
- AM 350®
Common Applications of AM 350®
- Aircraft Structural Components
- Landing Gear Parts
- Brackets and Fittings
- Fasteners
- Valve Components
- Turbine Components
Chemical Composition
| Element | Percent by Weight | |
|---|---|---|
| C | Carbon | 0.09 |
| Mn | Manganese | 0.80 |
| Si | Silicon | 0.30 |
| Cr | Chromium | 16.5 |
| Ni | Nickel | 4.3 |
| Mo | Molybedenum | 2,75 |
| N | Nitrogen | 0.10 |
| Fe | Iron | Balance |
| Condition H | Condition SCT 850 | Condition DA | |
|---|---|---|---|
| Density (kg/m3) | 7920 | 7810 | 7670 |
| Linear Coefficient of Thermal Expansion Units of 21-93C | 15.2 | 11.3 | 10.1 |
| Magnetic Permeability | 12 | 18 | 18 |
| Thermal Conductivity | Approximately 9.2 Btu-ft/hr-ft2 -F in the hardened conditions in the range of 20-150C | ||
| Electrical Resistivity | Approximately 80 microhm-cm in annealed or hardened condition | ||
| Elastic Modulus and Modulus of Rigidity (Room Temperature) | |||
|---|---|---|---|
| Condition H | Condition SCT 850 | Condition DA | |
| Modulus of Elasticity 106 psi (GPa) | 29 (200) | 29 (200) | 29 (200) |
| Modulus of Rigidity 106 psi (GPa) | 11 (75) | 11 (75) | 11 (75) |
| Room Temperature Properties (Typical Values) (Sheet and Strip) | |||
|---|---|---|---|
| Condition H | Condition SCT 850 | Condition DA | |
| 0.2% Yield Strength psi (MPa) | 70,000 (480) | 200,000 (1380) | 160,000 (1100) |
| Ultimate Tensile Strength psi (MPa) | 150,000 (1035) | 220,000 (1520) | 190,000 (1310) |
| Elongation (percent) | 30 | 9 | 10 |
| Hardness Rockwell Hardness Scale | 20 (C) | 46 (C) | 42 (C) |