AMS 5860 specification covers a corrosion and moderate heat-resistant steel (Custom 455 / UNS S45500) in the form of sheet, strip, and plate. This martensitic age-hardenable stainless steel offers an exceptional combination of high strength and good corrosion resistance. Alloy 455 is relatively soft and formable in the annealed condition, yet through a single-stage aging treatment it develops an exceptionally high yield strength while retaining good ductility and toughness. This alloy is primarily used in applications where martensitic stainless steels fail in terms of corrosion resistance, and standard austenitic stainless steels fail in terms of strength requirements in corrosive environments .
1. Product Specifications & Physical DataCustom 455 is a precipitation-hardening martensitic stainless steel that achieves its high strength through a simple single-stage aging treatment. It is available in sheet, strip, and plate forms for applications requiring high strength with good corrosion resistance. Available Forms: Sheet, strip, plate . Specifications: AMS 5860, ASTM A693, UNS S45500, Werkstoff Nr. 1.4543 .
| Chemical Composition (Weight %) | UNS S45500 Specification |
|---|
| Chromium (Cr) | 11.0 - 12.5 | | Nickel (Ni) | 7.5 - 9.5 | | Molybdenum (Mo) | 0.50 max. | | Titanium (Ti) | 0.80 - 1.40 | | Copper (Cu) | 1.50 - 2.50 | | Columbium + Tantalum (Cb+Ta) | 0.10 - 0.50 | | Carbon (C) | 0.05 max. | | Manganese (Mn) | 0.50 max. | | Silicon (Si) | 0.50 max. | | Phosphorus (P) | 0.040 max. | | Sulfur (S) | 0.030 max. | | Iron (Fe) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 7.78 g/cm³ | 0.281 lb/in³ | | Melting Range | 1400 - 1450°C | 2550 - 2640°F | | Modulus of Elasticity | 190 - 200 GPa | 27.6 - 29.0 × 10⁶ psi | | Thermal Conductivity (RT) | 16.4 W/m·K | 114 BTU·in/hr·ft²·°F | | Coefficient of Expansion (20-100°C) | 10.8 µm/m·°C | 6.0 µin/in·°F |
| Mechanical Properties (Annealed – Condition A) | Metric | Imperial |
|---|
| Tensile Strength (max.) | 1100 MPa | 160 ksi | | Yield Strength (0.2% offset) | 550 MPa | 80 ksi | | Elongation | 45% | 45% | | Hardness (Rockwell C) | 32 max. | 32 max. |
| Mechanical Properties (Aged Conditions) | Aging Temp | Tensile Strength | Yield Strength | Elongation |
|---|
| H900 | 482°C (1h) | 1550 MPa (225 ksi) | 1450 MPa (210 ksi) | 8% | | H950 | 510°C (2h) | 1500 MPa (218 ksi) | 1400 MPa (203 ksi) | 9% | | H1000 | 540°C (4h) | 1380 MPa (200 ksi) | 1240 MPa (180 ksi) | 12% | | H1050 | 566°C (4h) | 1170 MPa (170 ksi) | 1030 MPa (150 ksi) | 15% | | H1150 | 621°C (4h) | 1030 MPa (150 ksi) | 860 MPa (125 ksi) | 18% |
2. Fabrication & Material ComparisonAnnealing (Condition A): 1024-1052°C (1875-1925°F) × 1 hour, water or oil quench; produces soft, formable condition . Aging: 482-621°C (900-1150°F) × 4 hours, air cool; single-stage treatment develops full strength . Hot Working: 1150-1177°C (2100-2150°F); soak at temperature, then cool and fully anneal . Cold Working: Can be cold worked using all common techniques; good formability in annealed condition . Machining: Use positive feeds and slow speeds to achieve good results; carbide tooling recommended . Welding: Can be welded using resistance and shielded fusion techniques (GTAW); after welding, the alloy can be aged to attain good properties.
3. ApplicationsAerospace Components: Structural brackets, actuator housings, engine components requiring high strength and corrosion resistance High-Strength Fasteners: Bolts, nuts, screws, and rivets for corrosive environments Chemical Processing Equipment: Pumps, valves, and fittings where strength exceeds austenitic capabilities Marine Hardware: Components exposed to seawater where martensitics corrode and austenitics lack strength Medical Devices: Surgical instruments and implantable devices requiring high strength and corrosion resistance Industrial Tooling: Molds, dies, and tooling requiring good corrosion resistance and high hardness Oil & Gas: Downhole components, valve stems, wellhead equipment
Contact ZYTC Alloy for certified AMS 5860 Custom 455 (UNS S45500) sheet, strip, and plate with complete traceability, certificates, and competitive pricing. Available in solution annealed (Condition A) and aged conditions (H900-H1150) for high-strength corrosive service applications. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
