To appreciate the importance of JIS H 3270, one must understand the material it governs: beryllium copper. This is the strongest of the copper alloys, combining high strength with excellent electrical and thermal conductivity.
: Small and large marine propellers, stern tube sleeves, impellers, and pump housings that experience fast-moving saltwater forces.
The standard covers various types of bronze, brass, and high-strength brass. The most common grades include:
The standard primarily governs cast products made from aluminum bronze, a family of copper-based alloys where aluminum is the principal alloying element. It covers various properties including chemical composition, mechanical strength, and the testing methods required to ensure compliance. The units and values provided in this standard are based on the International System of Units (SI) for reference.
: Exposure to air or liquid causes these alloys to quickly generate a self-healing, adherent aluminum oxide film ( Al2O3cap A l sub 2 cap O sub 3 jis h 5114 pdf
Used for certain aircraft parts due to its relatively low specific gravity compared to other bronze alloys. 株式会社岡本 Standard Equivalents
| | JIS H 3270 | JIS H 5114 | | :--- | :--- | :--- | | Title | Copper beryllium alloy, phosphor bronze and nickel silver rods, bars and wires | Aluminium bronze castings | | Material Type | Wrought (rolled/extruded) Beryllium Copper | Cast Aluminum Bronze | | Product Forms | Rods, Bars, Wires | Castings (Sand, Die, etc.) | | Primary Alloying Element | Beryllium (Be) | Aluminum (Al) | | Key Properties | High strength, high fatigue resistance, non-sparking | High corrosion resistance, high strength, wear resistance | | Current Status | Active (Revisions in 2018, 2025) | Superseded / Withdrawn (Replaced by JIS H 5120) | | Typical JIS Symbol | C1720 | AlBC |
: Generally, one specimen is taken from each melt. The specimen must be cast at the same time as the product.
The Definitive Guide to JIS H 5114: Understanding the Copper Alloy Castings Standard To appreciate the importance of JIS H 3270,
Understanding JIS H 5114: Standards for Aluminum Bronze Castings
: Outlined requirements for test piece preparation, taking positions for hardness tests, and necessary markings (e.g., manufacturer's name, manufacture date, and class symbol).
superseded and integrated into the broader JIS H 5120 standard
Large-scale castings with superior tensile strength and toughness. Continuous ALBC 2C/3C Continuous The standard covers various types of bronze, brass,
JIS H 5114 categorizes materials into several classes based on their chemical composition and intended use:
The naturally lubricating oxide film and high hardness make these grades ideal for high-load bushings, heavy-duty bearings, gears, and valve seats.
Because technical compliance requires exact drawings, structural dimensions, and verified tolerances, using unverified or summarized third-party snippets can introduce engineering liabilities.
: Conducted according to the JIS Z 2243 standard. Sampling :
JIS H 5114 is the Japanese Industrial Standard for Aluminium Bronze Castings GlobalSpec Current Status Note that JIS H 5114 is superseded