What “the material” actually is
アルミニウム is sold as grades, not as a single substance. Chemistry Al (+ Mg, Si, Cu, Zn…), density 2.70 g/cm³, heat band 660 °C.
This atlas treats アルミニウム as a system: mill route, coatings, tests and the cavity it sits in.
基本データ
2.70 g/cm³Density
660 °CMelting
~237 W/m·KK
A1 metal / meltsFire
Can recyclingLoop
metalsFamily
アルミニウム is one of 32 materials in this atlas, grouped under metals: history, structure, measured properties, process routes, uses, safety and market — not a product catalogue.
Scores compare アルミニウム with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates.
Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.
深く読む
Deep dive: アルミニウム
アルミニウム (Al (+ Mg, Si, Cu, Zn…)) is a family of grades whose density 2.70 g/cm³, heat band 660 °C, and fire letter A1 as metal.
Heat, fire and insulation
Conductivity note: ~237 W/m·K (pure). Insulation score 12/100 is relative to 32 entries — metals lose, VIPs and aerogels win.
Fire letter in editorial use: A1 as metal. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.
How it is made and used
Origin: Hall–Héroult 1886, USA / France. The process chapter follows feedstock → conversion → forming → finish → install.
Uses span aerospace to consumer. Pairings matter: CFRP.
Market and circularity
Producers below are landmarks, not an endorsement ranking. Prices are bands, not live quotes.
Circularity mark 72/100. Ask which scrap, which certificate, which year.
プロファイル
強度
62
耐熱
48
火災性能
70
断熱
12
加工性
90
循環性
72
七つの章
よくある質問
アルミニウム or aluminum?
Same metal. IUPAC aluminium; US spelling aluminum. Specs use either.
Why is it light but not “weak”?
Specific strength of 7075 can beat mild steel; stiffness per volume still loses to steel.
Does it burn?
Bulk metal melts in fire; powders and some façade cores are the combustible stories.
Is it a good insulator?
No. It is a heat spreader. Foil radiant barriers reflect radiation; they are not bulk λ insulation.
Why do cans recycle so well?
Single alloy family, magnetic-free sort, huge volume, remelt energy is low.
Can I weld 7075?
Generally a bad idea for strength; designers rivet, bond or use 2000/5000 weldables instead.
Anodising vs paint?
Anodising grows oxide from the metal; paint is a separate film. Coasts often want both or a better alloy.
Is primary aluminium “green”?
Only if the kWh are. Hydro Québec ≠ coal-grid smelting.
アイコン
Hall–Héroult cell
USA / France · 1886–
Hall–Héroult cell is a reference point in the public image of アルミニウム.
Duralumin
Germany · 1906–
Duralumin is a reference point in the public image of アルミニウム.
アルミニウム can
United States · 1959–
アルミニウム can is a reference point in the public image of アルミニウム.
Audi Space Frame
Germany · 1994–
Audi Space Frame is a reference point in the public image of アルミニウム.
Wright Flyer metal later
United States · 1903 lore / metal later
Wright Flyer metal later is a reference point in the public image of アルミニウム.
Alclad sheet
United States · 1920s–
Alclad sheet is a reference point in the public image of アルミニウム.
Eiffel aluminium capstone lore
France · 1889 era
Eiffel aluminium capstone lore is a reference point in the public image of アルミニウム.
Tesla body castings
United States · 2020s
Tesla body castings is a reference point in the public image of アルミニウム.
アイコンのオンオフで、棒が選択内の首位に合わせて再スケールされる。
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対戦
同じ家族、違う点数 — 一戦を選ぶ。
近い素材
六軸で最も近い隣人 — 強度、耐熱、火災、断熱、加工性、循環性。