Noniin, kappaleet ois mitattu.
Copterx nupin keskiö ka~120HB
HK450 nupin keskiö ka~120HB
FMT500 lavanpidin ka 124HB
Align 500? stabbarin kehys 140-145HB
Align voitti taiston. Äxän ja HKn osat ovat samaa ainetta. En tiedä miten paljon vaikutti alikilin kappaleen pienempi paksuus ja litteämpi muoto, mutta sen sai painettua paremmin terästasoa vasten. Kaikista kappaleista viilasin eloksoinnin ensin pois pintaa kovettamasta. Mittauksia tehtiin 8kpl/näyte.
Loppupäätelmänä Alignin alumiini on vähän kovempaa, mutta ei mitenkään valtavasti. Kloonit on kaikki sorvattu samasta kangesta. Alumiinilaadut ovat helvetin tiukkoja kaikissa tapauksissa. Mitään räkäpaskaa eivät todellakaan ole. Veikkaisin laaduiksi seuraavia:
2024 Aluminum
Copper is the main alloying ingredient in 2024. It is very strong compared to most aluminum alloys, and has average machinability, but the copper component of this alloy makes it susceptible to corrosion (many items in this alloy are produced with a clad surface to protect the underlying material.) In addition, 2024 is not considered to be weldable.
Finally, the fatigue resistance of 2024 make it a primary choice when the application is expected to be under stress or strain for prolonged periods. It is commonly used in aerospace applications.
2024-T3 Aluminum
Minimum Properties Ultimate Tensile Strength, psi 70,000
Yield Strength, psi 50,000
Brinell Hardness 120
Rockwell Hardness B75
Chemistry Aluminum (Al) 90.7 - 94.7%
Chromium (Cr) 0.1% max
Copper (Cu) 3.8 - 4.9%
Iron (Fe) 0.5% max
Magnesium (Mg) 1.2 - 1.8%
Manganese (Mn) 0.3 - 0.9%
Silicon (Si) 0.5% max
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7075 Aluminum
7075 is the other "aircraft grade" aluminum that is carried by OnlineMetals. Its principal alloying ingredients are zinc and copper, which make it one of the highest-strength aluminum alloys that are available. In fact, its typical strength in the T6 temper is higher than most mild steels.
7075 also has average-to-good ratings for machinability, corrosion resistance, and anodizing response. Like 2024, however, it is not considered to be weldable.
7075-T6 Aluminum
Physical and Mechanical Properties Ultimate Tensile Strength, psi 83,000
Yield Strength, psi 73,000
Brinell Hardness 150
Rockwell Hardness B87
Chemistry Aluminum (Al) 87.1 - 91.4%
Zinc (Zn) 5.1 - 6.1% max
Copper (Cu) 1.2 - 2.0%
Chromium (Cr) 0.18 - 0.28%
Iron (Fe) 0.5 max
Magnesium (Mg) 2.1 - 2.9%
Manganese (Mn) 0.3% max