牌號(hào) | 820M17 |
對(duì)應(yīng)標(biāo)準(zhǔn) | BS 970-3-1991
機(jī)械及相關(guān)工程用鍛鋼 第3部分:一般工程用光亮鋼棒 Specification for wrought steel for machanical and allied engineering purposes part 3:bright bars for general engineering purposes |
歸類 | 合金鋼 |