| First Digit | Alloy Series | Principal Alloying Element(s) | Key Characteristics | |---|---|---|---| | 1xxx | Pure Aluminum | 99.00% or higher aluminum | Excellent corrosion resistance, formability, and high electrical/thermal conductivity. | | 2xxx | Al-Cu | Copper | High strength (the original duralumin-type alloys). Lower corrosion resistance and surface treatability. | | 3xxx | Al-Mn | Manganese | Moderate strength with good corrosion resistance and formability. | | 4xxx | Al-Si | Silicon | Low melting point, often used for brazing/welding filler material. | | 5xxx | Al-Mg | Magnesium | Good corrosion resistance (especially in marine environments) and moderate-to-high strength. Surface treats well. | | 6xxx | Al-Mg-Si | Magnesium and Silicon | A highly versatile and popular series. Good extrudability and strength, which is greatly increased by heat treatment. | | 7xxx | Al-Zn-Mg | Zinc (and sometimes copper) | The highest strength aluminum alloys. Good weldability in certain variations. | | 8xxx | Other Elements | e.g., Lithium, Iron | Alloys with other principal elements not listed above. | | 9xxx | Reserve | — | Reserved for future use. |
: It defines the chemical composition, mechanical properties, and dimensional tolerances for aluminum and aluminum alloy extruded profiles.
One of the most valuable features of the JIS H 4100 standard is its detailed classification of aluminum alloys. The standard lists dozens of approved alloys, each designated with a specific JIS symbol. jis h4100 standard pdf
Finding and purchasing a is the first step. The real value lies in how you apply its precise tables, tolerances, and specifications to your manufacturing process.
This alignment facilitates global procurement and quality assurance, allowing materials from different standards to be effectively compared and used in a single project. | First Digit | Alloy Series | Principal
Standards like JIS H4100 are not abstract academic artifacts; they shape everyday realities. They define dimensional tolerances, testing procedures, performance acceptance criteria, and safety margins that directly influence product reliability, maintenance practices, and workplace safety. When designers reference the standard, they reduce the risk of component mismatch, premature failure, or hazardous overpressure events. When maintenance teams follow the specified test procedures, they can detect degradation before catastrophic breakdowns. Public agencies rely on standardized definitions to evaluate compliance and certify equipment. The economic and human safety stakes are high.
Commercialized access impedes small-scale innovation. Standards are foundational infrastructure for engineering innovation. Startup teams and small manufacturers often iterate quickly; having to navigate licensing costs and restricted access slows prototyping and raises barriers to entry, ultimately reducing competition and technological diversity in hydraulic systems and related fields. | | 3xxx | Al-Mn | Manganese |
: Electrical equipment, heat exchangers, chemical processing equipment, kitchenware, packaging foil, signage
While JIS H4100 is essential for extrusions, you may also need:
Some unofficial sources may offer free downloads, such as:
The most authoritative source. The JSA sells individual PDFs (with a digital watermark) and annual subscriptions. Prices typically range from ¥10,000 to ¥30,000 JPY (~$70–$210 USD) depending on membership status.