Understanding the JIS H4100 Standard for Aluminium Extrusions
The standard outlines several critical requirements for extruded profiles: Alloy Designations : Common alloys covered include (high conductivity), (high strength), and (general structural use). Dimensional Tolerances : It establishes two classes of tolerances: Mechanical Properties
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For instance, a 6061-T6 extruded bar under JIS H4100 must meet a minimum tensile strength of 265 MPa, compared to 310 MPa for the stronger 7075-T6 alloy.
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The JIS H4100 standard applies to:
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Materials are categorized into Ordinary class or Special class . Special class designations fulfill restrictive structural assignments requiring tighter perpendicularity and angle profiles. Standard Evolution Timeline
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Extrusions must be free from detrimental defects. The standard regulates acceptable levels of surface imperfections, such as extrusion lines, scratches, pitting, and die marks. Comparative Equivalents