鋼(gang)材(cai)(cai)(cai)應用廣泛、品種繁多(duo),根據(ju)(ju)斷(duan)面(mian)形(xing)狀的(de)(de)不(bu)同,鋼(gang)材(cai)(cai)(cai)一般分為(wei)型材(cai)(cai)(cai)、板材(cai)(cai)(cai)、管材(cai)(cai)(cai)和金屬制品四大類。鋼(gang)材(cai)(cai)(cai)是鋼(gang)錠、鋼(gang)坯(pi)或鋼(gang)材(cai)(cai)(cai)通(tong)過壓(ya)力加工(gong)制成的(de)(de)一定形(xing)狀、尺寸和性能的(de)(de)材(cai)(cai)(cai)料。大部分鋼(gang)材(cai)(cai)(cai)加工(gong)都(dou)是通(tong)過壓(ya)力加工(gong),使(shi)被(bei)加工(gong)的(de)(de)鋼(gang)(坯(pi)、錠等)產生(sheng)塑性變(bian)形(xing)。根據(ju)(ju)鋼(gang)材(cai)(cai)(cai)加工(gong)溫度(du)不(bu)同,可以分為(wei)冷加工(gong)和熱(re)加工(gong)兩種。