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| 제 목 |
TITANIUM |
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| 글쓴이 |
Admin
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| 글정보 |
Hit : 2545, Date : 2016/04/01 21:48 |
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▣ Types of Titanium
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Grade |
Feature |
Main Use |
Pure
Titanium |
Grade 1 |
Low strength |
Plate-type heat exchanger |
| Grade 2 |
Optimal combination of most-used Pure Titanium |
pipe’s |
| strength and weldability |
| Grade 3 |
High strength |
Tube-type heat exchanger,
Pressure-resistant skin |
Titanium
Alloy |
Grade 5 |
The most produced Titanium Alloy |
aircraft, submarine |
| high strength, high heat-resistance |
| Grade 7 |
High corrosion-resistance |
chemistry |
| Grade 9 |
High strength + high corrosion-resistance |
submarine,
water pressure pipes |
| Grade 11 |
Similar to Grade 7 |
submarine exploration |
| Grade 12 |
High temperature resistance than Pure Titanium |
tube-type heat exchanger,
pressure-resistant skin |
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▣ Titanium’s Standard
Stan
dards |
Grade |
chemical substances(MAX, %) |
Mechanical Property (annealing) |
| N |
C |
H |
Fe |
O |
Ti |
tensile strength |
proof stress(0.2%offset) |
elongation(%) |
| kgf/mm |
Ksi |
Mpa(N/mm) |
kgf/mm |
Ksi |
Mpa(N/mm) |
| ASTM |
Grade 1 |
0.03 |
0.10 |
0.015 |
0.20 |
0.20 |
rema
ining |
>=25 |
>=25 |
>=240 |
18~32 |
24~45 |
170~310 |
>=24 |
| Grade 2 |
0.03 |
0.10 |
0.015 |
0.30 |
0.30 |
>=35 |
>=50 |
>=345 |
24~46 |
40~65 |
275~450 |
>=20 |
| Grade 3 |
0.05 |
0.10 |
0.015 |
0.30 |
0.30 |
>=46 |
>=65 |
>=450 |
39~56 |
55~80 |
380~550 |
>=18 |
| Grade 4 |
0.05 |
0.10 |
0.015 |
0.50 |
0.50 |
>=56 |
>=80 |
>=550 |
49~67 |
70~95 |
485~655 |
>=15 |
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▣ Titanium Alloy’s Standard
Stan
dard |
Grade |
chemical substances(MAX, %) |
Mechanical Property
(annealing) |
| N |
C |
H |
Fe |
O |
Ai |
V |
Pd |
Ti |
tensile
strength |
proof
stress
(0.2% offset) |
elongation
(%) |
Mpa
(N/m) |
Mpa
(N/m) |
| ASTM |
Grade5 |
0.05 |
0.10 |
0.015 |
0.40 |
0.20 |
5.5~
6.75 |
3.5~4.5 |
- |
rema
ining |
895 |
830 |
10 |
| Grade7 |
<=0.03 |
<=0.10 |
<=0.015 |
<=0.30 |
<=0.25 |
- |
- |
0.1~
0.25 |
>=345 |
275~450 |
>=20 |
Grade
11 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
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▣ Comparative Table of Titanium Corrosion Resistance
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Titanium |
Titanium
alloy |
Aluminum |
Aluminum
alloy
7075-T6 |
Iron |
18-8 STAINLESS AISI304 |
Hastelloy C |
| melting point |
1,668 |
1,540~1,650 |
660 |
476~638 |
1,530 |
1,400~1,427 |
1,305 |
| density(g/㎤) |
4.51 |
4.42 |
2.70 |
2.80 |
7.86 |
8.03 |
8.92 |
| Atomic Number |
22 |
22 |
13 |
13 |
26 |
26 |
- |
| Atomic Weight |
47.90 |
- |
26.97 |
- |
55.85 |
- |
- |
Young's modulus
(㎬) |
108.5 |
1115.5 |
70.5 |
72.8 |
196.0 |
203.2 |
208.6 |
| Poisson`s ratio |
0.34 |
0.30~0.33 |
0.33 |
0.33 |
0.31 |
0.29 |
- |
Resistivity
(μΩ-㎝,20℃) |
47~55 |
171 |
2.7 |
5.8 |
9.7 |
72 |
130 |
Electric
conductivity
(Compared to
that of Cu,%) |
3.1 |
1.1 |
64.0 |
30.0 |
18.0 |
2.4 |
1.3 |
Thermal
conductivity
(cal/㎤/sec/℃/㎝) |
0.041 |
0.018 |
0.487 |
0.294 |
0.145 |
0.039 |
0.031 |
Coefficient of linear
expansion
( ㎝/㎝/℃, 0~100℃) |
8.4×10-6 |
8.8×10-6 |
23.0×10-6 |
23.1×10-6 |
12.0×10-6 |
16.5×10-6 |
11.5×10-6 |
Specific heat
(cal/g/℃) |
0.12 |
0.13 |
0.21 |
0.23 |
0.11 |
0.12 |
0.09 |
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▣ Comparative Table of Titanium Corrosion Resistance Feature
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Corrosion medium |
Composition
(%) |
Temperature
(℃) |
Corrosion Resistance |
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Pure
Titanium |
Zirconium |
SUS304 |
SUS316 |
Hastelloy |
Inorganic
acids |
Hydrochloric Acid
(HCl) |
1 |
25 |
A |
A |
B |
A |
A |
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boiling |
D |
A |
D |
D |
C |
| 10 |
25 |
B |
A |
D |
D |
C |
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boiling |
D |
A |
D |
D |
D |
Sulphuric Acid
(H2SO4) |
10 |
25 |
A |
A |
A |
A |
A |
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boiling |
D |
A |
D |
C |
B |
| 10 |
25 |
B |
A |
B |
B |
A |
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boiling |
D |
A |
D |
D |
B |
Nitric Acid
(HNO3) |
10 |
25 |
A |
A |
A |
A |
A |
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boiling |
A |
A |
A |
A |
B |
| 65 |
25 |
A |
A |
A |
A |
B |
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boiling |
A |
A |
B |
B |
D |
Organic
acid |
Acetic Acid
(CH3COOH) |
10 |
boiling |
A |
A |
A |
A |
A |
| 60 |
boiling |
A |
A |
B |
B |
A |
Oxalic Acid
((COOH)2) |
10 |
25 |
A |
A |
C |
B |
A |
| 30 |
boiling |
D |
A |
D |
D |
A |
Sacrolactic Acid
(CHO3CH(OH)COOH) |
10 |
25 |
A |
A |
B |
B |
B |
| 85 |
boiling |
A |
A |
D |
D |
B |
| Alkali |
Caustic Soda
(NaOH) |
10 |
100 |
A |
A |
A |
A |
A |
| 40 |
boiling |
D |
B |
B |
B |
B |
Potassium Carbonate
(K2CO3) |
5 |
boiling |
A |
A |
A |
A |
A |
| 20 |
boiling |
A |
A |
A |
A |
A |
Inorganic
chlorides |
Sodium Chloride |
25 |
25 |
A+ |
A |
B+ |
B+ |
B |
| - |
boiling |
A |
B |
B+ |
B+ |
B+ |
Magnesium
Chloride |
42 |
25 |
A+ |
A |
A+ |
A+ |
A |
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boiling |
A |
A |
A+ |
A+ |
A+ |
| Ferric Chloride |
30 |
25 |
A+ |
D |
D |
D |
C |
| - |
boiling |
A |
D |
D |
D |
D |
Inorganic
salts |
Sodium
Sulfate |
25 |
25 |
A |
A |
A |
A |
A |
| - |
boiling |
A |
A |
A |
A |
A |
Sodium
Nitrate |
10 |
25 |
A |
A |
A |
A |
A |
| - |
boiling |
A |
A |
B |
B |
A |
Sodium
Carbonate |
30 |
25 |
A |
A |
A |
A |
A |
| - |
boiling |
A |
A |
A |
A |
A |
| Gas |
Chlorine |
Dryness |
25 |
D |
A |
A |
A |
A |
| Dampness |
25 |
A+ |
D |
D |
D |
D |
Hydrogen
Sulfide |
Dryness |
25 |
A |
A |
C |
B |
A |
| Dampness |
25 |
A |
A |
B |
A |
B |
| Ammonia |
100 |
40 |
A |
A |
A |
A |
A |
| - |
100 |
A |
A |
A |
A |
A |
| Etc. |
Seawater |
- |
25 |
A |
A |
A+ |
A+ |
A |
| - |
100 |
A+ |
A |
B+ |
B+ |
A+ |
| Naptha |
- |
80 |
A |
A |
A+ |
A+ |
A |
| - |
180 |
A |
A |
A+ |
A+ |
A |
A : 0.125mm/year or less B : 0.125~0.5mm/year C : 0.5~1.25mm/year D : 1.25mm/year
※ Sometimes provokes local corrosion including pitting corrosion and corrosion of crack |
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