牌號 GC-CuSn12，GC-CuSn12錫青銅是一種銅合金，被評價為具有優良的可切削性能，相當于GC-CuSn12銅合金。
這種合金的含錫量一般在3～13%之間，主要用于制作彈性元件和耐磨零件。
變形錫青銅的含錫量不超過 8%，有時還添加磷、鉛、鋅等元素。
磷是良好的脫氧劑，還能改善流動性和耐磨性。
錫青銅中加鉛可改善可切削性和耐磨性，加鋅可改善鑄造性能。
這種合金具有較高的力學性能、減磨性能和耐蝕性，易切削加工，釬焊和焊接性能好，收縮系數小，無磁性。
其用途包括制作形狀復雜、輪廓清晰、氣密性要求不高的鑄件，以及蒸汽鍋爐和海船零件。
德國W-Nr. 2.1052.04舊牌號 GC-SnBz12對應標準 DIN 1705-1981銅錫合金鑄件(錫青銅和火炮金屬鑄件)歸類 銅及銅合金標簽 連鑄錫青銅說明 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 化學元素成分含量(%)成分FePSNiCuPbZnSnSb其他合計小值----84--11--大值0.20.40.05288.511130.21.2