Standard specification for age - hardening alloy steel forgings for pressure vessel components 壓力容器部件用時效硬化合金鋼鍛件的標準規(guī)范
Iron and steel . case hardened alloy steels for solid highly - stressed mechanical parts . grades . semi - finished products and bars 鋼鐵.高應力機械零件用滲碳合金鋼.等級.半成品和棒材