ADC12是日本牌号，又称12号铝料，Al-Si-Cu系合金，是一种压铸铝合金，执行标准为JIS H 5302-2006《铝合金压铸件》，上海期货交易所将其作为铸造铝合金期货交割基准。 该合金适合气缸盖罩盖、传感器支架、缸体类等部件生产，在铸造铝合金中占比超过70%。
ADC12 (JIS H 5302 standard) is one of the most widely used aluminum alloys in the die casting industry. Known for its excellent mechanical properties, superb castability, and good surface treatment characteristics, ADC12 has become a preferred material for numerous industrial applications.