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SS 625 Control Line Tubing N06625 Heat Treated Marine Aerospace
In oil and gas applications, control lines made from Alloy 825 are employed in downhole operations for hydraulic control, chemical injection, and signal transmission. They are often chosen for environments with high pressures, temperatures, and corrosive elements like hydrogen sulfide (H₂S) and carbon dioxide (CO₂). Alloy 825 provides a balance of strength, flexibility, and resistance to sour gas corrosion, making it an ideal choice for downhole tubing in offshore and onshore oil fields.
Alloy 825 (UNS N08825) is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. It is designed to provide excellent resistance to both reducing and oxidizing acids, stress-corrosion cracking, and localized attack such as pitting and crevice corrosion. Due to its superior corrosion resistance and strength, Alloy 825 is widely used in harsh environments, including oil and gas applications.
Corrosion Resistance Of Different Materials (G28 A Method)
Grade
Rate(mm/a)
N08825
≤ 0.9
N08020
≤ 0.5
N08367
≤ 0.5
N06625
≤ 0.9
N10276
≤ 10
N06200
≤ 1.5
N06022
≤ 1.0
N06600
≤ 1.0
N06601
≤ 1.0
825 825E Chemical Composition
C
Sl
Mn
P
S
Cr
Mo
Ti
Cu
Fe
Al
Ni
≤ 0.05
≤ 0.5
≤ 1.0
≤ 0.02
≤ 0.03
19.5-23.5
2.5-3.5
0.6-1.2
1.5-3
≧ 22
0-0.2
38-46
Mechanical Properties
Property
825 Mln.
825E Mln.
2507 Mln.
2205 Mln.
Max.
Tensile strength (psi)
85000
95000
116000
95000
-
Yield strength (psi)
35000
60000
80000
70000
-
Elongation (%)
30
18
15
25
-
Size Dependent Characteristics (Based Upon Nominal Tubing Dimensions)
Type
O.D. (in.)
W.T. (in.)
Maximum Theoretical Working Pressure (psi)
Minimum Theoretical Collapse Pressure (psi)
Nominal Theoretical Burst Pressure (psi)
Welded
1/4
0.035
7220
7583
21014
1/4
0.049
10513
9979
29278
1/4
0.065
14769
21198
55000
1/4
0.083
34538
24861
70333
Welded
3/8
0.035
8013
9125
19901
3/8
0.049
11485
12262
27727
3/8
0.065
15815
15611
36894
3/8
0.083
21047
18953
47180
Welded
1/2
0.035
5929
7024
14984
1/2
0.049
8435
9530
20876
1/2
0.065
11509
12282
27779
1/2
0.083
15148
15133
35523
Seamless
1/4
0.035
12377
13000
29667
1/4
0.049
18022
17107
41333
1/4
0.065
25318
21198
55000
1/4
0.083
34538
24861
70333
Seamless
3/8
0.035
8013
9125
19901
3/8
0.049
11485
12262
27727
3/8
0.065
15815
15611
36894
3/8
0.083
21047
18953
47180
Seamless
1/2
0.035
5929
7024
14984
1/2
0.049
8435
9530
20876
1/2
0.065
11509
12282
27779
1/2
0.083
15148
15133
35523
Key Properties of Alloy 825
Corrosion Resistance: Excellent resistance to a wide range of corrosive environments, especially sulfuric acid, phosphoric acid, and seawater. It also resists stress-corrosion cracking, making it suitable for environments with high levels of chloride.
High Strength and Durability: The alloy exhibits good mechanical properties at both room temperature and elevated temperatures up to about 538°C (1000°F).
Oxidation Resistance: Good resistance to oxidation and scaling at elevated temperatures.
Localized Corrosion Resistance: The molybdenum and copper in Alloy 825 provide resistance to reducing environments, while chromium enhances resistance to oxidizing conditions.
Applications
Key Properties:
Oil and Gas Control Lines: Alloy 825 is used in control line tubing in oil and gas applications, particularly for downhole systems exposed to corrosive environments with high chloride concentrations, acids, or sour gas. These control lines deliver hydraulic control, transmit pressure signals, or inject chemicals.
Chemical Processing: Used in chemical processing industries where sulfuric acid, phosphoric acid, and other corrosive agents are present.
Nuclear Fuel Reprocessing: The alloy is resistant to nitric acid and other radioactive environments, making it suitable for nuclear fuel reprocessing.
Heat Exchangers and Piping: Ideal for heat exchangers, piping, and tanks exposed to seawater or industrial chemicals.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Seller
Year Established:
2002
Total Annual:
1000000-120000000+
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Changzhou DLX Alloy Co., Ltd. was established in 2002 and has passed ISO9001 international quality management system certification and SGS certification.We initially focused on the production of resistance alloys. Over the past 20 years, we have continued to conduct research and development and now ... Changzhou DLX Alloy Co., Ltd. was established in 2002 and has passed ISO9001 international quality management system certification and SGS certification.We initially focused on the production of resistance alloys. Over the past 20 years, we have continued to conduct research and development and now ...
