Word: 合金 (héjīn) 合金 dictionary entry héjīn alloy Full dictionary entry for 合金 Example sentences using 合金 2 sentences, showing page 1 of 1. 合金通常比纯金属更硬。 Héjīn tōngcháng bǐ chún jīnshǔ gèng yìng. Alloys are usually harder than pure metals. 这扇门的材料是什么合金？ Zhè shàn mén de cáiliào shì shénme héjīn? What kind of alloy is this door made of?