Custom® 455 AMS 5617
Custom 455 is a martensitic age-hardenable stainless steel that is relatively soft and formable in the annealed condition. A single-step aging treatment develops exceptionally high yield strength with good ductility and toughness.
Stock sizes: 0.2500” to 2.750” diameter
Common Specifications:
- AMS 5617 GRADE 1
- ASTM-F899
- ASTM-A564
- BOEING MDM6-1093
Common Applications:
- Landing gear components
- Slat components
- Pneumatic cylinders, braces and struts
- Engine valves springs
- Endoscopic instruments
- Medical scrapers, cutters, suture needles
Melting Method: VIM-VAR
Heat treatment: solution heat treated to 1800 degrees F, held for 60 minutes, then quenched and cooled to -100 degrees F and held for at least 8 hours.
Macrostructure Limits:
| Condition | Hardness HB |
|---|---|
| H 950 | 415 |
| H 1000 | 388 |
Composition
| Element | Grade 1 Min | Grade 1 Max | Grade 2 Min | Grade 2 Max |
|---|---|---|---|---|
| Carbon | — | 0.03 | — | 0.010 |
| Manganese | — | 0.50 | — | 0.50 |
| Silicon | — | 0.50 | — | 0.20 |
| Phosphorus | — | 0.015 | — | 0.010 |
| Sulfur | — | 0.015 | — | 0.010 |
| Chromium | 11.00 | 12.50 | 11.00 | 12.50 |
| Nickel | 7.50 | 9.50 | 7.50 | 9.50 |
| Titanium | 0.90 | 1.40 | 1.00 | 1.35 |
| Copper | 1.50 | 2.50 | 1.50 | 2.50 |
| Molybdenum | — | 0.50 | — | 0.50 |
| Columbian | — | 0.50 | — | 0.50 |
| Nitrogen | — | 0.015 | — | 0.010 |
Minimum Tensile Properties, inch/pound units
| Condition | Nominal Diameter or Least Distance Between Parallel Sides — Inches | Tensile Strength — psi | Yield Strength at 0.2% Offset — psi | Elongation in 4D — % | Reduction of Area — % |
|---|---|---|---|---|---|
| H950 | Up to 4.000, incl Over 4.000 to 6.000, incl | 225000 220000 | 210000 205000 | 10 10 | 40 40 |
| H1000 | Up to 8.000, incl | 200000 | 185000 | 10 | 40 |
