MD Exports LLP Specialist in Inconel Alloy 625 Pipe., Pipes Tubes are manufactured using superior grade of Inconel like Alloy 600 Pipe, Alloy 601 Pipe, Alloy 625 Pipe, Incoloy 800 Pipe, Incoloy 825 Pipe, Alloy 718 Pipe, Inconel X-750 Pipe, These Tubing are most durable and manufactures to fit in different size of Pipes. Engineers & World's Best Project Consultants use these Inconel Pipe in Machined Components, MD Exports LLP Specialized Inconel Alloy 625 Pipe & supplying to Government sector companies since 2 decades,we are approved vendor of Inconel Alloy 625 Pipe in top notch government sector companies like ONGC, Indian Oil,NTPC,BHEL,ONGC,HPCL BPCL etc.we are also Saudi Aramco approved supplier of Inconel Alloy 625 Pipe, we have supplied Inconel Alloy 625 Pipe to companies involved in Equipment Manufacturing, Mining, Oil Refineries, Chemical manufacturing, Steel and Alloy Steel Manufacturing, Utilities and Transportation, and Industrial Construction
We stock approximately 1000 tonnes of high quality certified Inconel Alloy 625 Pipe in numerous sizes and materials which can be packed and shipped to any destination worldwide., We provide Inconel Alloy 625 Pipe in all shapes and sizes and with any specifications that the clients || MD Exports LLP Specialized in Inconel Alloy 625 Pipe in India, Ready Stock Available in Inconel Alloy 625 Pipe in Mumbai India.
INCONEL 625 TECHNICAL DATA
Type Analysis | Description | Corrosion Resistance | Pickling | Physical Properties | Mechanical Properties | Heat Treatment | Workability
Type Analysis
Element | Min | Max |
Carbon | -- | 0.10 |
Nickel | Bal. | |
Chromium | 20.0 | 23.0 |
Iron | -- | 5.00 |
Silicon | -- | 0.50 |
Manganese | -- | 0.50 |
Sulfur | -- | 0.015 |
Phosphorus | -- | 0.015 |
Molybdenum | 8.00 | 10.0 |
Titanium | -- | 0.40 |
Cobalt | -- | 1.00 |
Columbium + Tantalum | 3.15 | 4.15 |
Aluminum | -- | 0.40 |
Description
Alloy 625 is a nonmagnetic , corrosion - and oxidation-resistant, nickel-based alloy. Its outstanding strength and toughness in the temperature range cryogenic to 2000°F (1093°C) are derived primarily from the solid solution effects of the refractory metals, columbium and molybdenum, in a nickel-chromium matrix. The alloy has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions. Some typical applications for alloy 625 have included heat shields, furnace hardware, gas turbine engine ducting, combustion liners and spray bars, chemical plant hardware, and special seawater applications.
Corrosion Resistance
Alloy 625 has withstood many corrosive environments. In alkaline, salt water, fresh water, neutral salts, and in the air, almost no attack occurs. The nickel and chromium provide resistance to oxidizing environments. Nickel and molybdenum provide for resistance to nonoxidizing atmospheres. Pitting and crevice corrosion are prevented by molybdenum. Niobium stabilizes the alloy against sensitization during welding. Chloride stress-corrosion cracking resistance is excellent. The alloy resists scaling and oxidation at high temperatures.
Pickling
Sodium hydride baths are necessary to descale this alloy. After the sodium hydride treatment, the material should be immersed in a sulfuric acid bath 165°F (74°C) for approximately 3 minutes. A 25-minute immersion in a nitric-hydrofluoric bath 145°F (63°C) is then necessary. Rinse. Sulfuric solution: 16% by weight, H2SO4. Nitric solution: 8% HNO3 by weight and 3% HF by weight. Acid etching for macro-inspection-expose material electrolytically to a 3-to-1 HCl to HNO3 solution, saturated with CuCl 2 at a current density of 0.645 amp/in² (25.4 A/m)
Physical Properties
Physical Property | °C | Metric Units | °F | British Units |
Density | 22 | 8.44 g/cubic cm | 72 | 0.305 lb/cubic in. |
Electrical Resistivity |
23 100 200 300 400 500 600 |
1.26
microhm-m 1.27 1.28 1.29 1.30 1.31 1.32 |
74 212 392 572 752 932 1112 |
49.6
microhm-in. 50.0 50.4 50.8 51.2 51.6 52.0 |
Mean
Coefficient of Thermal Expansion |
20-204 20-316 20-427 20-538 20-649 20-760 20-871 20-982 |
13.1 x
10(-6)m/m-°C 13.5 13.9 14.4 15.1 15.7 16.6 17.3 |
68-400 68-600 68-800 68-1000 68-1200 68-1400 68-1600 68-1800 |
7.3
microinches/in.-°F 7.5 7.7 8.0 8.4 8.7 9.2 9.6 |
Thermal Conductivity |
23 100 200 300 400 500 600 |
9.8
W/M-°C 11.4 13.4 15.5 17.6 19.6 21.3 |
74 212 392 572 752 932 1112 |
68
Btu-in./ft².-hr.-°F 79 93 108 122 136 148 |
Specific Heat |
0 100 200 300 400 500 600 |
429
J/kg-°C 446 463 480 496 513 560 |
32 212 392 572 752 932 1112 |
0.102
Btu/lb-°F 0.107 0.111 0.115 0.118 0.123 0.134 |
Average Dynamic Modulus of Elasticity *
Form | Condition | Test
Temp., F(C) |
Average
Dynamic Modulus of Elasticity, psi x 10(6) (MPa) |
Plate, 3/8 in. (9.5 mm) thick |
Annealed at 1925°F (1052°C), rapid cooled |
Room 200 (93) 400 (204) 600 (316) 800 (427) 1000 (538) 1200 (649) 1400 (760) 1600 (871) 1800 (982) |
30.2 (208,000) 29.2 (201,000) 28.8 (199,000) 27.7 (191,000) 26.7 (184,000) 25.6 (176,000) 24.3 (168,000) 22.8 (157,000) 21.2 (146,000) 18.7 (129,000) |
* Average of five tests at each temperature.
Mechanical Properties
Average Impact Strength, Plate *
Aging
Temperature, |
Aging Time, hrs. |
Average
Charpy V-Notch Impact Strength, |
|
ft. lbs. | J | ||
Annealed** | -- | 81 | 110 |
1200 (649) | 1000 4000 8000 16000 |
11 8 5 4 |
15 11 7 5 |
1400 (760) | 1000 4000 8000 16000 |
5 4 5 4 |
7 5 7 5 |
1600 (871) | 1000 4000 8000 16000 |
12 11 15 14 |
16 15 20 19 |
*Average of
four tests on 1/2-in. (12.7mm) plate from a single heat.
**1875F
(1024C), rapid cooled.
Average Hardness and Tensile Data, Room Temperature
Condition | Form | Ultimate Tensile Strength, ksi (MPa) |
Yield Strength at 0.2% offset,ksi (MPa) |
Elongation in 2" percent |
Hardness, Rockwell |
Annealed at 1925°F (1052°C), rapid cooled |
Sheet 0.014-0.063" thick |
132.0 (910) | 67.9 (468) | 47 | B94 |
Annealed at 1925°F (1052°C), rapid cooled |
Sheet,* 0.0.78-0.155" thick |
131.5 (907) | 67.4 (465) | 45 | B97 |
Annealed at 1925°F (1052°C), rapid cooled |
Plate,*** 1/4" 1/2" 3/4" 1.00" 1-1/2" 1-3/4" |
132.0 (910) 130.0 (896) 132.3 (912) 127.2 (877) 127.3 (878) 128.0 (883) |
65.5 (452) 67.0 (462) 80.0 (552) 75.3 (519) 73.7 (508) 66.0 (455) |
46 44 44 42 43 44 |
B94 B98 B98 B97 B97 C20 |
*Based on average of 146
tests
**Based on average of 67 tests.
***Based on average of 4
or less tests.
Aged Hardness, Room Temperature*
Form | Aging
Temperature, F (C) |
Aging Tme, hrs. | Hardness, Rockwell A |
Plate, |
Annealed** | -- | 58 |
1200 (649) | 1000 4000 8000 |
68 68 68 |
|
1400 (760) | 1000 4000 8000 |
65 66 65 |
|
1600 (871) | 1000 4000 8000 |
60 60 60 |
*Single
tests from a single heat.
**1875F (1024C), rapid cooled.
Average Tensile Data, Room Temperature*
Form | Aging
Temperature, F (C) |
Aging Tme, hrs. | Ultimate Tensile Strength, Ksi (MPa) |
Yield Strength at 0.2% offset, Ksi (MPa) |
Elongation in 2 in., (50.8 mm), percent |
Plate, |
Annealed** | -- | 127.7 (880) | 66.2 (456) | 46 |
1200 (649) | 1000 4000 8000 16000 |
165.0 (1138) 163.6 (1128) 164.2 (1132) 165.4 (1140) |
122.3 (843) 117.9 (813) 117.8 (812) 118.5 (817) |
28 24 18 12 |
|
1400 (760) | 1000 4000 8000 16000 |
142.9 (985) 145.5 (1003) 142.6 (983) 140.4 (968) |
95.5 (658) 104.1 (718) 97.4 (672) 96.1 (663) |
17 12 13 12 |
|
1600 (871) | 1000 4000 8000 16000 |
130.0 (896) 130.0 (896) 127.0 (876) 128.4 (885) |
68.3 (471) 66.4 (458) 63.7 (439) 63.4 (437) |
30 29 26 32 |
*Average of
three tests from a single heat.
**1875F (1024C), rapid cooled.
Average Tensile Data, Sheet*
Test Temperature, °F(°C) |
Ultimate Tensile Strength, ksi (MPa) |
Yield Strength at 0.2% offset,ksi (MPa) |
Elongation in 2" percent |
Room 200 400 600 800 1000 1200 1400 1600 1800 2000 |
138.8 (957) 133.3 (919) 129.4 (892) 125.6 (866) 122.2 (843) 119.9 (827) 119.6 (825) 88.4 (609) 52.1 (359) 25.0 (172) 13.3 (92) |
72.0 (496) 67.3 (464) 62.2 (429) 59.5 (410) 59.2 (408) 58.8 (405) 57.0 (393) 55.3 (381) 34.9 (241) 10.8 (75) 6.1 (42) |
38 41 44 45 45 46 47 70 69 108 89 |
*Annealed at 1925°F (1052°C), rapid cooled.
Average Rupture Data, Sheet*
Test
Temperature, |
Average
Rupture Strength, ksi (MPa) |
||
10 hrs | 100 hrs | 1000 hrs | |
1200 (649) 1400 (760) 1600 (871) |
82 (565) 36 (248) 12 (83) |
71 (490) 27 (186) 6.7 (46) |
60 (414) 20 (138)** 3.7 (26)** |
*Annealed
at 1925°F (1052°C), rapid cooled.
**Extrapolated
Heat Treatment
Alloy 625 has
three basic heat treatments:
(1)High Solution Anneal - 2000/2200°F (1093/1204°C), air quench or faster.
(2)Low
Solution Anneal - 1700/1900°F (927/1038°C), air quench or
faster.
(3)Stress Relieve - 1650°F (899°C), air
quench.
The time at the above temperatures depends on volume and
section thickness. Strip, for example, would require shorter times
than large sections. Temperatures for treatments No. 1 and 2 are
generally held for 1/2 to 1 hour, 1 to 4 hours for treatment No.
3.
Treatment No. 1 is not commonly used for applications below
1500°F (816°C). It is generally used above 1500°F and
where resistance to creep is important. The high solution anneal is
also used to develop the maximum softness for mild processing
operations such as cold rolling or drawing.
Treatment No. 2 is the
used treatment and develops an optimum combination of tensile and
rupture properties from ambient temperatures to 1900°F (1038°C).
Ductility and toughness at cryogenic temperatures are also very
good.
Treatment No. 3 is recommended for application below 1200°F
(649°C) when maximum fatigue, hardness, tensile and yield
strength properties are desired. Ductility and toughness at
cryogenic temperatures are excellent. When a fine grain size is
desired for fatigue, tensile and yield strengths up to 1500°F
(816°C), treatment No. 3 is sometimes used.
Workability
Hot
Working
Hot working may done at 2100°F (1149°C)
maximum furnace temperature. Care should be exercised to avoid
frictional heat build-up which can result in overheating, exceeding
2100°F (1149°C). Alloy 625 becomes very stiff at temperatures
below 1850°F (1010°C). Work pieces that fall below this
temperature should be reheated. Uniform reductions are recommended to
avoid the formation of a duplex grain structure. Approximately 15/20%
reduction is recommended for finishing.
Cold
Forming
Alloy 625 can be cold formed by standards methods.
When the material becomes too stiff from cold working, ductility can
be restored by process anneal.
Machineability
Low cutting speeds, rigid tools and work piece, heavy equipment, ample coolant and positive feeds are
general recommendations.
High-Speed Cutting Tools for Lathe Turning Operations
Angle | Roughing | Finishing |
Back rake Positive side rake End clearance End cutting edge Side cutting edge |
0° 6° 6° -- |
8° 14-18° 8° 25° Up to 45° |
Cutting Speeds for High-Speed Steels
Operation | Speed | Feed | ||
sfpm | m/s | ipr | mm/rev | |
Turning Drilling (.500"/12.70mm) Tapping Milling Reaming |
12-20 10-12 5-10 10-20 8-10 |
0.06/.010 0.05/0.06 0.03/0.05 0.05/0.10 0.04/0.05 |
0.010 0.006/0.010 -- -- -- |
0.25 0.15/0.25 -- -- -- |
Carbide tools should have smaller angles than high-speed tools and operating speeds can be higher. A sulfur-based cutting fluid is recommended. Thoroughly clean work piece after machining to prevent surface contamination during subsequent heat treating. Chlorine additives would be an alternative.
Weldability
Welding
can be accomplished by the gas-shielded processes using a tungsten
electrode or a consumable electrode. Postweld heat treatment of the
weld are not necessary to maintain corrosion resistance. Heavy
restrained sections can be welded and the weld's mechanical
properties follow the same trends as base metal properties. Standard
practices such as clean surfaces, good joint alignment, U-joints for
thicker sections, etc., should be followed.
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