牌号 GC-CuSn12，GC-CuSn12锡青铜是一种铜合金，被评价为具有优良的可切削性能，相当于GC-CuSn12铜合金。
这种合金的含锡量一般在3～13%之间，主要用于制作弹性元件和耐磨零件。
变形锡青铜的含锡量不超过 8%，有时还添加磷、铅、锌等元素。
磷是良好的脱氧剂，还能改善流动性和耐磨性。
锡青铜中加铅可改善可切削性和耐磨性，加锌可改善铸造性能。
这种合金具有较高的力学性能、减磨性能和耐蚀性，易切削加工，钎焊和焊接性能好，收缩系数小，无磁性。
其用途包括制作形状复杂、轮廓清晰、气密性要求不高的铸件，以及蒸汽锅炉和海船零件。
德国W-Nr. 2.1052.04旧牌号 GC-SnBz12对应标准 DIN 1705-1981铜锡合金铸件(锡青铜和火炮金属铸件)归类 铜及铜合金标签 连铸锡青铜说明 特性：Material with good wear resistance; corrosion and sea water resistant. The materials G-CuSn12Ni and GCuSn12Pb were developed from this alloy, which are characterized by increased strength and wear resistance and improved emergency running properties. See G-CuSn12 properties, but more uniform, 0.2 limit, higher tensile strength and hardness用途：Ring and tubular construction parts as well as longitudinal profiles, e.g. Worm wheel rims, cylinder inserts, high-load adjusting and sliding stripsGC-CuSn12 化学元素成分含量(%)成分FePSNiCuPbZnSnSb其他合计小值----84--11--大值0.20.40.05288.511130.21.2