... from 550 to 17 95 MPa (80 to 260 ksi) and minimum yield strengths from 275 to 14 50 MPa (40 to 210 ksi) for the 14 grades in A 14 8. Figures 15 , 16 , 17 , 18 , 19 , 20, and 21 illustrate microstructures ... (L.L. Bright) Fig. 44 Low-alloy cast steel (0.28C-0.55Mn -1 . 3Si -1 . 00Ni -1 . 5Cr-0.4OMo), normalized at 925 °C (17 00 °F), hardened by water quench from 900 °C (16 50 °F), and tempered at 290 °C (550 ... ksi). Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 , 11 , 12 , 13 , and 14 in the section "Atlas of Microstructures for Carbon and Low-Alloy Steel Castings" in this article show microstructures...