tendency to embrittlement(Molybdenum is added to alloy steels in association with nickel and chromium, where it reduces the tendency to embrittlement that would otherwise occur when these steels are heat-treated. 将钼、镍、铬一起加人到合金钢中，能降低合金钢热处理时的脆化倾向。)
tendency to make steels brittle(Phosphorus is usually controlled in carbon steels to a very low amount, usually not greater than 0.040 per cent, because of its tendency to make steels brittle. 由于磷具有使钢变脆的倾向，故碳钢的含磷量通常控制得很低，一般不超过0.040%。)
