| ECONOMICS OF ALLOY STEELS | 47 |
|
Referring to Table 5g, we have Nickel Steel |
| 96.00 lbs. Steel | @ 8.5¢ = $8.16 |
| 4.00 lbs. Nickel | @ 43¢ = 1.72 |
| 100.00 lbs. Alloy | @ 9.88¢ = $9.88 |
|
Nicmol Steel |
| Working tensile stress for heat-treated steel | = 58,300 lbs. |
| Ditto untreated (approximately) | = 45,000 lbs. |
| Average= 1/3 (2 X 45,000 + 58,300) | = 49,400 lbs. |
Nickel Steel
| Working tensile stress for heat-treated steel | = 40,000 lbs. |
| Ditto untreated | = 28,000 lbs. |
| Average = 1/3 (2 X 28,000 + 40,000) | = 32,000 lbs. |
|
and r r' = 1.162 X 0.647 = 0.752
As this is lower than any of the values of r r' given in Figs. 5a and 5b,it is evident that the addition of molybdenum to nickel steel will always effect a large economy. Nichromol Steel versus Nichro SteelReferring to Tables 5c and 5d, we have the following: Nichromol Steel |
| 95.76 lbs. Steel | @ 8.5¢ = $8.14 |
| 0.86 lb. Chromium | @ 25¢ = 0.22 |
| 2.95 lbs. Nickel | @ 43¢ = 1.27 |
| 0.43 lbs. Molybdenum | @ $2.53 = 1.09 |
| 100.00 lbs. Alloy | @ 10.72¢ = $10.72 |