3 sentences

1. 这种新型钢材的强度很高。

   zhè zhǒng xīn​xíng gāng​cái de qiáng​dù hěn gāo.

   This new type of steel has high strength.

   Source: Dong Chinese Dictionary

2. 这家工厂主要生产建筑用的钢材。

   zhè jiā gōng​chǎng zhǔ​yào shēng​chǎn jiàn​zhù yòng de gāng​cái.

   This factory mainly produces steel for construction.

   Source: Dong Chinese Dictionary

3. 这种钢材需要经过反复锻炼才能成型。

   zhè zhǒng gāng​cái xū​yào jīng​guò fǎn​fù duàn​liàn cái néng chéng​xíng.

   This steel needs to go through repeated forging to take shape.

   Source: Dong Chinese Dictionary