ASTM B861 GR.2 Titanium Alloy Steel Seamless Pipe Heat Exchanger
Electric Appliance
ASTM B861 GR.7 Corrosion Resistance
Titanium has strong corrosion resistance in various media,
especially in neutral and oxidizing media. It can also be used in
some dilute reducing acids, such as various concentrations of
nitric acid at constant temperature up to the boiling point. It has
good corrosion resistance to most alkaline solutions, such as
Barium hydroxide, Calcium hydroxide and Magnesium hydroxide
saturated solutions at room temperature, but can not be used for
boiling sodium hydroxide solution. Titanium is completely non
corrosive in seawater and is also highly resistant to corrosion in
most organic acids (except for formic acid and oxalic acid). It has
excellent corrosion resistance in wet chlorine, Chlorite,
Hypochlorite and other chloride solutions. The corrosion resistance
in sodium chloride solution increases with the increase of solution
pH value
The specific strength of ASTM B861 GR.7 Titanium Heat Exchanger
Pipe is high:
The density of titanium alloy is generally about 4.5g/cm3, only 60%
of steel, the strength of pure titanium is close to the strength of
ordinary steel, and some high-strength titanium alloys exceed the
strength of many alloy structural steel. Therefore, the specific
strength (strength/density) of titanium alloy is much higher than
that of other metal structural materials, and components with high
unit strength, good rigidity and light weight can be produced. At
present, titanium alloys are used in aircraft engine components,
skeletons, skins, fasteners and landing gear.
ASTM B861 GR.7 Titanium Heat Exchanger Pipe has high thermal
strength:
The use temperature is several hundred degrees higher than that of
aluminum alloy, and the required strength can still be maintained
at moderate temperatures, and it can work for a long time at a
temperature of 450 ~ 500 ° C. These two types of titanium alloys
still have a high specific strength in the range of 150 ° C to 500
° C, while the specific strength of aluminum alloys decreases
significantly at 150 ° C. The operating temperature of titanium
alloy can reach 500℃, and that of aluminum alloy is below 200℃.
The corrosion resistance of ASTM B861 GR.7 Titanium Heat Exchanger
Pipe is good:
Titanium alloy works in humid atmosphere and seawater medium, its
corrosion resistance is much better than stainless steel;
Resistance to pitting corrosion, acid corrosion, stress corrosion
is particularly strong; Excellent corrosion resistance to alkali,
chloride, chlorine, nitric acid, sulfuric acid, etc.
ASTM B861 GR.7 Titanium Heat Exchanger Pipe has good low
temperature performance:
Titanium alloy can still maintain its mechanical properties at low
and ultra-low temperatures. Titanium alloys with good low
temperature performance and very low gap elements, such as TA7, can
maintain a certain plasticity at -253 ° C. Therefore, titanium
alloy is also an important low-temperature structural material.
ASTM B861 GR.7 Titanium Heat Exchanger Pipe have high chemical
activity:
Titanium has a large chemical activity and produces a strong
chemical reaction with O, N, H, CO, CO2, water vapor, ammonia and
so on in the atmosphere. When the carbon content is greater than
0.2%, hard TiC will be formed in titanium alloy; When the
temperature is higher, TiN hard surface will be formed by the
interaction with N. Above 600℃, titanium absorbs oxygen to form a
hardened layer with high hardness; The embrittlement layer is also
formed when the hydrogen content increases. The chemical affinity
of titanium is also large, and it is easy to adhere to the friction
surface.
The thermal conductivity and elastic modulus of ASTM B861 GR.7
Titanium Heat Exchanger Pipe are small:
The elastic modulus of titanium alloy is about 1/2 of steel, so its
rigidity is poor, easy to deform, it is not suitable to make
slender rods and thin-walled parts, and the amount of rebound of
the machining surface during cutting is very large, about 2 to 3
times that of stainless steel, resulting in severe friction,
adhesion and adhesive wear of the tool after the tool surface.
ASTM B861 GR.7 Titanium Alloy Steel Heat Exchanger Pipe Application
Area:
Aerospace
Plate heat exchangers
Bellows expansion joints
Seawater desalination
Desulfurization and denitrification
Chemical equipment
etc
General introduction
| Item Name | Grades | Standard | Dimension (MM) | Application |
| Titanium Pipe | Gr1 Gr2 Gr3 Gr7 Gr9 Gr12 Gr16 Gr17 3.7025 3.7035 3.7235 3.7195
3.7105 BT1-00 BT1-0 | ASTM B337 B338 B861 B862 ASME SB338 ASME SB337 ASME SB861 SB862
DIN17861 | Φ10-Φ114 x0.4-10x 100-15000 MM | heat exchanger coil pipe Condenser petroleum pipeline Sea farming
Evaporimeter Fluid Transporation Piping etc. |
Chemical Composition Element(Weight %)
| Composition | Grade1 | Grade2 |
| Carbon | 0.65–1.10 | 0.75–1.15 |
| Manganese | 1.50 max | 1.50 max |
| Silicon | 14.20–14.75 | 14.20–14.75 |
| Chromium | 0.50 max | 3.25-5.00 |
| Molybdenum | 0.50 max | 0.40-0.60 |
| Copper | 0.50 max | 0.50 max |
| Other Trade Name | Cp Titanium Grade 2, Cp Gr2 Titanium |
| Specification and Grade | ASTM B 337 ASME SB 337 / ASTM B 338 ASME SB 338 / ASTM B861 / B862 |
| Sizes Available | ½” to 24”NB in Sch 10s, 40s, 80s, 120, 160s, XXS. |
| Frequently Used Types | Seamless / ERW / Welded / Fabricated |
| Forms Available | Round, Hydraulic Etc |
| Lengths | Cut to size |
| Pipe End Forming | Treaded Both Ends, Plain Both Ends, Beveled end, Bevel small end,
Bevel one end, Bevel large end, Bevel both ends, Plain One End,
Treaded One End, Beveled One end |
| Melting Point | 1665 °C (3030 °F) |
| WERKSTOFF NR. | 3.7035 |
| UNS | R50400 |
