... 1500 1800 2100 HYDROGEN PARTIAL PRESSURE (N/cm2) Figure 3.4. Operating limits for steels in atmospheres containing hydrogen. 72 Materials Selection Deskbook 0 0 Elongation, 10% ... castings. However, it is restricted to Properties and Selection of Materials 67 Table 3.10. Alloying Effects that Improve Creep Properties [ 14) Stress for rupture, N/mm*, in 100,000 hr ... molybdenum and 2% copper) or the ferritic/austenitic steels would solve this problem. 68 Materials Selection Deskbook 3.5.1 Chromium Steels (400 Series), Low-Carbon Ferritic (Type 405): 12-13%...