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Metals:
Titanium
Zirconium
Tantalum
Niobium
Nickel based alloys
Titanium
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Titanium is the fourth most plentiful metal on earth; Australian rutile ore (TiO2) |
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Titanium is 1/2 as dense as steel - 0.163 lbs./cu. in. |
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Similar in strength to 316 SS - 50ksi Min. UTS |
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Excellent corrosion resistance, especially C1's |
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Suitable Environments:
Wet Chlorine
Chlorinated Compounds
Oxidizing Acid
Sea Water
Most Organic Chemicals
Compatible with body fluids |
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Maximum Process Temperature 600º F (315º C) |
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Major grades (Ti-2, Ti-7, Ti-12, Ti-16 & Ti-26) |
Zirconium
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Zirconium is the 9th most common metal on earth; Zr/Hf sands are readily available throughout the world |
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Zirconium is 80% of the density of steel: .0235 lbs/ cu. in. |
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55ksi Min. UTS |
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Excellent corrosion resistance to reducing acids |
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Major Zirconium grades:
Zr-702
Zr-705 |
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Suitable Environments:
Strong acids-both oxidizing and reducing
Strong Caustics
Salt Solutions
Sea Water
Most Organic Environments |
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Maximum Process Temperature 700º F (371º C) |
Tantalum
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Tantalum comes from tin mines as a K2TaF7 ore |
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Tantalum is 2x as dense as steel - 0.6 lbs/cu. in. |
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Ta is a soft ductile metal
Ta: 25ksi UTS
Ta 1 1/2% W: 40 ksi UTS |
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Tantalum has the best corrosion resistance of any metal |
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Major tantalum grades:
Pure Ta
Ta w/ 2 1/2% tungsten alloy
Ta 10% tungsten alloy
Ta 40% tungsten alloy |
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Suitable Environments:
Inert to nearly all organic & inorganic compounds
Except hydrofluoric & strong alkalis
HCL Acid (boiling to 32%)
H2SO4 Acid (boiling to 72%)
Acetic Acid
HNO3 Acid |
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Maximum Process Temperature 500º F (260º C) |
Niobium
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Poor man's tantalum |
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Niobium is 1/2 as dense as Tantalum - 0.31 lbs/cu.in. |
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Strength similar to Ta 30ksi Min. UTS |
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Similar corrosion resistance as Ta; Excellent in high concentration HNO3 |
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Suitable Environments:
Similar to Tantalum except that is should not be used in sulfuric acid
Used in bromine operations
Excellent for 98% fuming HNO3 Acid |
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Maximum Process Temperature 300º F (149º C) |

Nickel Based Alloys
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Densities: 0.297 to 0.33 lbs/cu.in. |
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Strength: 100-120 ksi min. UTS |
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Major grades: B-2, B-3, C-22, C-276, C-2000, G-3,and G-30 |
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Suitable Environments:
"B" Alloys-Reducing Acids
"C" Alloys - Oxidizing Acids
"G" Alloys - Phosphoric and Acetic Acids |
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Maximum Process Temperature
"B" Alloys - 800º F (427º C)
"C" Alloys - 1250º F (676º C)
"G" Alloys - 800º F (427º C) |
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