钢的含硫量(Machinability, an important engineering consideration, can be enhanced by increasing the sulphur content of the steel to as much as 0.3 per cent, compared with about 0.04 per cent which is normal. 机械加工性能是工程上考虑的一项重要因素，它可以通过将钢中含硫量提高到0.3%得火提高。正常情况下钢中含硫量约为0.04%。)
