A list of named alloys is a compiled reference that enumerates metallic alloys which have been given specific commercial, scientific, or historical names rather than being identified solely by their constituent elements or generic classifications. Such lists serve as resources for materials scientists, engineers, historians, and industry professionals by providing concise information on the composition, typical applications, and notable properties of each alloy.
Purpose and Scope
The primary purpose of a list of named alloys is to catalog alloys that have attained distinct recognition through usage, standardization, or trademark. Entries typically include:
- Alloy name – the conventional or trademarked designation (e.g., “Brass,” “Inconel 718,” “Damascus steel”).
- Principal constituent elements – the major metals and alloying elements, often presented as weight percentages or compositional ranges.
- Key properties – salient mechanical, chemical, or physical characteristics that differentiate the alloy (e.g., corrosion resistance, high‑temperature strength, electrical conductivity).
- Typical applications – industries or components where the alloy is commonly employed (e.g., aerospace, automotive, marine, jewelry).
- Standards and specifications – references to relevant ASTM, ISO, SAE, or other national/international standards that define the alloy’s requirements.
Classification Schemes
Lists may be organized according to several classification criteria:
- Base metal family – grouping by the primary metal (e.g., ferrous alloys, copper alloys, aluminum alloys, nickel‑based superalloys, titanium alloys).
- Functional properties – categorization by intended performance, such as high‑strength steels, corrosion‑resistant alloys, high‑temperature alloys, or conductive alloys.
- Historical or cultural context – sections for alloys recognized for historical significance (e.g., “Bronze” of the Bronze Age, “Wootz steel”).
- Alphabetical order – a straightforward listing by the alloy’s name for ease of lookup.
Representative Examples
| Alloy Name | Principal Elements (typical range) | Notable Property | Common Uses |
|---|---|---|---|
| Brass | Copper (60–90 %), zinc (10–40 %) | Good machinability, acoustic qualities | Musical instruments, fittings, decorative hardware |
| Bronze | Copper (80–95 %), tin (5–20 %) | Excellent corrosion resistance, low friction | Bearings, marine hardware, sculpture |
| Stainless steel (e.g., 304) | Iron, chromium (≥18 %), nickel (≥8 %) | Corrosion resistance, formability | Food processing equipment, architecture |
| Inconel 718 | Nickel (50–55 %), chromium (17–21 %), molybdenum (2.8–5.5 %), niobium/tantalum (4.75–5.5 %) | High strength at 700 °C, oxidation resistance | Turbine engines, rocket motors |
| Titanium alloy (Ti‑6Al‑4V) | Titanium, aluminum (5–6 %), vanadium (4–5 %) | High strength‑to‑weight ratio, good fatigue resistance | Aerospace structures, biomedical implants |
| Nichrome (Ni‑80/Cr‑20) | Nickel (≈80 %), chromium (≈20 %) | High electrical resistance, stable at >1000 °C | Heating elements, resistors |
| Duralumin | Aluminum (≈95 %), copper (≈4 %), magnesium (≈0.5 %), manganese (≈0.5 %) | High strength after heat treatment | Aircraft skins, structural components |
| Monel | Nickel (≈65–70 %), copper (≈30–35 %) | Excellent corrosion resistance in seawater | Marine hardware, chemical processing |
| Hastelloy C‑276 | Nickel (≈57 %), molybdenum (≈16 %), chromium (≈16 %), iron, cobalt (≈5 %) | Superior resistance to reducing acids | Chemical reactors, desalination plants |
Sources and References
Authoritative compilations of named alloys are found in:
- Standardization bodies’ publications (e.g., ASTM International, ISO, SAE International).
- Metallurgical handbooks such as ASM Handbook (Volumes on alloy phase diagrams and properties).
- Government and industry material databases (e.g., National Institute of Standards and Technology (NIST) Alloy Phase Diagrams, MatWeb).
- Historical and technical literature documenting traditional alloys (e.g., The Cambridge History of Ancient Metallurgy for bronze and early steel types).
Limitations
Because alloy development is continuous and many proprietary compositions are protected by trade names, any list of named alloys is inherently incomplete and may become outdated. New alloys may be introduced without widespread publication, and some names may be region‑specific or industry‑specific. Users should verify the latest specifications from the relevant standard‑setting organization or manufacturer when selecting an alloy for a specific application.