標準號：ISO 9327-4-1999
中文標準名稱：壓力用途的鋼鍛件和軋制或鍛造的棒材 交貨技術條件 第4部分:高強度可焊接細粒鋼
英文標準名稱：Steel forgings and rolled or forged bars for pressure purposes - Technical delivery conditions - Part 4: Weldable fine grain steels with high proof strength
標準類型：H44
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：H44
國際標準分類號：77.140.30;77.140.60;77.140.85
適用范圍：1 This part of ISO 9327 applies to forgings and rolled or forged bars in thicknesses up to 250 mm manufactured from fine grain steels (see NOTE) given in Table 1 and to be delivered according to the specifications given in ISO 9327-1. The steels are classified into — room temperature grades (P...). — elevated temperature grades (PH...), — low temperature grades (PL...), — low and elevated temperature grades (PLH...). NOTE Fine grain steels are here understood as steels with grain size 6 or finer according to the grain size charts in ISO 643. 2 This part of ISO 9327 covers the following data: a) In Table 1 the limits for — the chemical composition according to the cast analysis; — the tensile properties at room temperature; — the indications on the usual heat treatment condition at the time of delivery; b) in Table 2 the permissible product analysis tolerances on the limiting values given for the cast analysis; c) in Table 3 the minimum impact energy values; d) in Table 4 the minimum elevated temperature proof strength values.