Table of possible replacements for steels N03, N5, N8

Technical Report · Sat May 29 04:00:00 EDT 1943

OSTI ID:7280586

Eymann, K

The compositions of steels that could be used as replacements are given in tabular form. The table was sent to the Italian liquefaction plant A.N.I.C. at Milan. As a replacement for N03 (also called K3), which apparently was used for highly stressed bolts and flanges, one could use K3CV up to a temperature of 500/sup 0/C, and could use either K1MS and K4MS up to 350/sup 0/C. K3CV contained about 0.2% carbon, 0.7% to 0.8% manganese, 1.2% to 1.4% chromium, and 0.25% to 0.35% vanadium, whereas K1MS and K4MS contained about 0.35% carbon, 1.2% silicon, and 1.2% manganese, with individual variations to distinguish the two steels from each other. As replacement for N5, an electric-furnace steel, one could use N5A for mounting brackets or ring magnets, N5B for cold-drawn tube bundles, or N5C for forged or cast parts. Each of these steels had 0.25% to 0.5% manganese, and 2.5% to 2.8% chromium, but N5B had no vanadium while N5A and N5C had 0.1% to 0.2% vanadium, and N5C had 0.4% silicon while both the others had less silicon, and both N5A and N5B had about 0.12% carbon while N5C had 0.12% to 0.18% carbon. As substitutes for N8, one could use N8A for temperatures up to 400/sup 0/C or N9 for temperatures from 400/sup 0/C to about 530/sup 0/C, where N9 at 700 atm. pressure lost its stability against hydrogen. N8A contained 0.2% to 0.25% carbon, 0.25% to 0.4% silicon, 0.3% to 0.5% manganese, 2.0% to 2.3% chromium, and 0.25% to 0.5% vanadium, whereas N9 contained 0.19% to 0.24% carbon, no silicon, 0.25% to .5% manganese, 2.5% to 2.8% chromium, 0.2% to 0.3% molybdenum, and 0.55% to 0.65% vanadium. 1 Table

• Research Organization: I.G. Farbenindustrie, Ludwigshafen (Germany)
• OSTI ID: 7280586
• Report Number(s): TOM-251-472a-473
• Country of Publication: United States
• Language: German

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