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Inconel 625 tube

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What is Inconel 625 tube?

The Inconel 625 material is a nickel-based austenitic superalloy, which has high strength at elevated temperatures. The Inconel 625 Tube is known for its great fabricability and shows excellent resistance to corrosion in various corrosive environments. Due to all these properties, the Inconel 625 Tubing can be used for a wide range of applications like offshore oil drilling equipment, mooring cables, etc. Inconel 625 is resistant to pitting, crevice corrosion and chloride ion related stress corrosion cracking.

AMS 5581 tubing and Inconel 625 seamless tube manufacturer in India

Inconel 625 tube manufacturer in India

ASTM B444 UNS N06625 vs ASME SB 704 N06625

The ASTM B444 UNS N06625 Seamless Tube is mostly supplied in the annealed condition. They have many remarkable properties like good resistance to corrosion. They also show properties like good tensile strength and they have good creep resistance. These pipes are mostly available with seamless construction.

The ASTM B704 UNS N06625 Welded Tube is used for various high temperatures. They are found in heat exchangers, condensers, boilers and applications that expose the tube to a fluctuating temperature.

Searching Inconel 625 tubing supplier in Gujarat? Buy AMS 5581 Type 1 heat exchanger tube at factory pipe

Inconel 625 tube

Inconel 625 tube

AMS 5581 tubing

AMS 5581 tubing

Inconel 625 seamless tubing

Inconel 625 seamless tubing

Why cold drawn process done for Inconel 625 seamless tubes?

The cold drawn seamless Alloy 625 Tube comes with more dimensional accuracy and improved surface finish. They also offer better mechanical properties like higher tensile strength. The process helps to match tighter straightness tolerance as per your specifications. It gives the 625 tubes a polished and bright appearance.

We are manufacturing Alloy 625 tube and Inconel 625 exhaust tubing in various custom-made shapes, sizes and thicknesses

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Inconel 625 tube manufacturer

Specifications of Inconel 625 seamless tubing

Wall Size Length
Seamless: .028 to.083" Welded:.028 to .100 " Seamless: .188 to 1.500 " Welded: .250 to 7 " 6 to 12 meter
MTC Specification Process
EN 10204 3.1 & 3.2 ASTM B444 | ASME SB 444 seamless, annealed, hot rolled, welded
We supply Inconel 625 seamless tubing and ASTM B704 UNS N06625 welded tube with MTC Certificate

Alloy 625 tube types

AMS 5581 type 1 heat exchanger tube

AMS 5581 type 1 heat exchanger tube

Inconel 625 tubing

Inconel 625 tubing

Inconel 625 exhaust tubing

Inconel 625 exhaust tubing

Alloy 625 tube

Alloy 625 tube

ASTM B444 UNS N06625 seamless tube

ASTM B444 UNS N06625 seamless tube

ASME SB 444 N06625 hydraulic tubing

ASME SB 444 N06625 hydraulic tubing

ASTM B704 UNS N06625 welded tube

ASTM B704 UNS N06625 welded tube

ASTM B751 N06625 high pressure tubing

ASTM B751 N06625 high pressure tubing

ASME SB 704 UNS N06625 welded and drawn tubes

ASME SB 704 UNS N06625 welded and drawn tubes

ASME SB 704 N06625 condenser tube

ASME SB 704 N06625 condenser tube

DIN 2.4856 round tube

DIN 2.4856 round tube

Nickel 625 coiled tubing

Nickel 625 coiled tubing

Check specifications and tolerances of N06625 hydraulic tubing and Nickel 625 coiled tubing as per ASTM B704, ASTM B751 standards

Inconel 625 tube sizes

Description (SMLS 625 ) OD Manufacture Method Wall
5581 LCS 1/2 X .028 0.5000 SEAMLESS & DRAWN 0.0280
B/SB444 3/4 OD X .083WA 0.7500 SEAMLESS & DRAWN 0.0830
B/SB444 1/2 OD X .065WA 0.5000 SEAMLESS & DRAWN 0.0650
B/SB444 1/2 OD X .035WA 0.5000 SEAMLESS & DRAWN 0.0350
AMS 5581 3/4 X .028 WA 0.7500 SEAMLESS & DRAWN 0.0280
B/SB444 3/4 OD X .065WA 0.7500 SEAMLESS & DRAWN 0.0650
B/SB444 3/8 OD X .065WA 0.3750 SEAMLESS & DRAWN 0.0650
B/SB444 3/8 OD X .035WA 0.3750 SEAMLESS & DRAWN 0.0350
B/SB444 1.00 OD X .083WA 1.0000 SEAMLESS & DRAWN 0.0830
B/SB444 1.00 OD X .065WA 1.0000 SEAMLESS & DRAWN 0.0650

Inconel 625 tubing pressure rating

Tube O.D. (Inch) Wall Thickness of Tube (inches)
.028 .035 .049 .065 .083 .095 .109 .120
Working Pressure (psig)
3/8 3100 4400 6100
1/2 2300 3200 4400
1/8 7900 10100
1/4 3700 4800 7000 9500
5/16 3700 5400 7300
3/4 2200 3000 4000 4600
1 2200 2900 3400 3900 4300

Chemical composition of Inconel 625 exhaust tubing

Weight % Cr Ni Mo Fe Nb + Ta Ti C Si Mn S P Al Co
Alloy 625 20 - 23 58.0 min 8 -10 5.0 max 3.15 -4.15 0.40 max 0.10 max 0.50 max 0.50 max 0.15 max 0.15 max 0.40 max 1.0 max

Mechanical properties of UNS N06625 seamless tube

Material Tensile Strength MPa Form and Condition Yield Strength (0.2% Offset) MPa Hardness HB Elongation 4D(%)
Ksi MPa Ksi MPa
Alloy 625 Tube Seamless and Welded 120 827 Annealed 60 414 - 35

N06625 hydraulic tubing standards

Pipe Seamless ASTM B829, ASTM B444, ASME SB 444, BS3074 NA21, ASME SB 829
Tube VdTUV 499, DIN 17751, ISO 6207, ASME Code Case 1935
Pipe Welded ASTM B705, ASME SB 705, ASTM B775, ASME SB 775
Tube Welded AMS 5581, ASTM B704, ASME SB 704, ASTM B751, ASME SB 704, AMS 5581 Type 2
Tube Seamless ASTM B829, ASTM B444,ASME SB 444, AMS 5581, ASME SB 829, AMS 5581 Type 1, BS3074 NA21

ASTM B704 UNS N06625 welded tube thermal properties

Temp. °F Thermal Conductivityb,c Btu•in/ft2-h•°F Meal Linear Expansiona 10-6in/in•°F Electrical Resistivityc ohm-circ mil/ft Mean Linear Expansiona µm/ µm•°C Temp °C Electrical Resistivityc µΩ-cm Thermal Conductivity b,c W/m•°C
200 75 7.1 794 12.8 93 132 10.8
400 87 7.3 806 13.1 204 134 12.5
600 98 7.4 812 13.3 316 135 14.1
800 109 7.6 818 13.7 427 136 15.7
1000 121 7.8 830 14.0 538 138 17.5
1200 132 8.2 830 14.8 649 138 19.0
-250 50 - - - -157 - 7.2
-200 52 - - - -129 - 7.5
-100 58 - - - -73 - 8.4
0 64 - - - -18 - 9.2
70 68 - 776 - 21 129 9.8
100 70 - 780 - 38 130 10.1
1400 144 8.5 824 15.3 760 137 20.8
1600 158 8.8 818 15.8 871 136 22.8
1700 - 9.0 - 16.2 927 - -
1800 175 - 812 - 982 135 25.2
2000 - - 806 - 1093 134 -

ASTM B751 N06625 high pressure tubing temperatures

Temp. °F Poisson’s Ratio Modulus of Elasticity, 103 ksi Temp. °C Modulus of Elasticity, GPa
Tension Shear Tension Shear
Annealed Solution- Treated Annealed Solution- Treated Annealed Solution- Treated Annealed Solution- Treated Annealed Solution- Treated
800 0.295 0.302 26.9 26.2 10.4 10.0 427 185.5 180.6 71.7 68.9
1000 0.305 0.312 25.9 25.1 9.9 9.6 538 178.6 173.1 68.3 66.2
1200 0.321 0.314 24.7 24.0 9.4 9.2 649 170.3 165.5 64.8 63.4
70 0.278 0.312 30.1 29.7 11.8 11.3 21 207.5 204.8 81.4 78.0
200 0.280 0.311 29.6 29.1 11.6 11.1 93 204.1 200.6 80.0 76.5
400 0.286 0.303 28.7 28.1 11.1 10.8 204 197.9 193.7 76.5 74.5
600 0.290 0.300 27.8 27.2 10.8 10.4 316 191.7 187.5 74.5 71.7
1400 0.340 0.305 23.3 22.8 8.7 8.8 760 160.6 157.2 60.0 60.7
1600 0.336 0.289 21.4 21.5 8.0 8.3 871 147.5 148.2 55.2 57.2

ASME SB 704 UNS N06625 welded and drawn tubes physical properties

70°F 400°F 600°F 200°F 800°F 1000°F
Density lbs/in3 0.305 - - - - -
Thermal Conductivity Btu-in/h·ft2·°F 68 87 98 75 109 139
Specific Heat Btu/lb·°F 0.098 0.109 0.115 0.102 0.122 0.118
Thermal Expansion X10-6/°F - 7.3 7.4 7.1 7.6 7.7
Elastic Modulus 103 ksi 30.1 28.7 27.8 29.6 26.9 25.7
Poisson Ratio - 0.278 0.286 0.29 0.28 0.295 -
Yield Strength ksi 70 63 60 68 59 34
Tensile Strength ksi 140 130 129 134 129 88

Weight chart of ASME SB 704 N06625 condenser tube

NPS Wall Thickness Outside Dia Weight Weight
in mm in mm Sched kg/Mtr Lb/ft
2 1/2″ 0.203 5.516 2.875 73 40 STD 8.629 5.793
0.276 7.010 80 STD 11.411 7.661
3″ 0.216 5.486 3.500 89 40 STD 11.284 7.576
0.300 7.620 80 STD 15.272 10.253
4″ 0.237 6.020 4.500 114 16.073 10.790
0.337 8.560 22.318 14.983
6″ 0.188 4.775 6.625 168 19.252 12.924
0.203 5.516 20.739 13.923
0.219 5.563 22.318 14.983
0.250 6.350 25.354 17.021
0.280 7.112 40 STD 58.263 18.974
0.312 7.925 31.334 21.036
0.375 9.525 37.285 25.031
0.432 10.973 80 XHY 42.561 28.573
0.500 12.700 48.719 32.708
8″ 0.188 4.775 8.625 219 25.233 16.940
0.203 5.156 27.198 18.259
0.219 5.563 29.286 19.661
0.250 6.350 20 33.308 22.361
0.277 7.036 30 36.786 24.696
0.322 8.179 40 42.352 28.554
0.375 9.525 49.216 33.041
0.406 10.312 60 53.085 35.638
0.500 12.700 80 XHY 64.627 43.388
1/2″ 0.109 2.769 0.840 21 40 STD 1.268 0.851
0.147 3.734 80 STD 1.621 1.088
3/4″ 0.113 2.870 1.050 27 40 STD 1.684 1.131
0.154 3.912 80 STD 2.195 1.474
1″ 0.133 3.378 1.315 33 40 STD 2.501 1.679
0.179 4.547 80 STD 3.325 2.172
1 1/4″ 0.140 3.556 1.660 42 40 STD 3.385 2.273
0.191 4.851 80 STD 4.464 2.997
1 1/2″ 0.145 3.683 1.900 48 40 STD 4.048 2.718
0.200 5.080 80 STD 5.409 3.361
2″ 0.154 3.912 2.375 60 40 STD 5.441 3.653
0.218 5.537 80 STD 7.480 5.022
10″ 0.188 4.775 10.750 273 31.588 21.207
0.219 5.563 36.689 24.631
0.250 6.350 20 41.759 28.035
0.307 7.798 30 51.002 34.240
0.344 8.738 56.946 38.231
0.365 9.271 40 STD 63.301 40.483
0.438 11.125 71.852 48.238
0.500 12.700 60 XHY 81.530 54.735
0.594 15.088 80 95.969 64.429
12″ 0.188 4.775 12.750 324 37.570 25.222
0.219 5.563 43.657 29.309
0.250 6.350 49.713 33.375
0.281 7.137 55.739 37.420
0.312 7.925 61.735 41.445
0.375 9.525 73.824 49.562
0.406 10.312 79.727 53.525
0.500 12.700 97.438 65.415
0.562 14.275 108.966 73.154
14″ 0.188 4.775 14.000 356 41.308 27.732
0.219 5.563 48.012 32.233
0.250 6.350 20 54.685 36.713
0.281 7.137 61.327 41.172
0.312 7.925 67.939 45.611
0.375 9.525 STD 81.281 54.568
0.438 11.125 40 94.498 63.441
0.500 12.700 XHY 107.381 72.090
0.625 15.875 132.983 89.278
16” 0.188 4.775 16.000 406 47.290 21.748
0.219 5.563 54.980 36.910
0.250 6.350 10 62.639 42.053
0.281 7.137 70.268 47.174
0.312 7.925 20 77.866 52.275
0.344 8.738 85.677 57.519
0.375 9.525

30

STD

 93.213 62.578
0.438 11.125 108.433 72.797
0.500 12.700

40

XHY

 123.289 82.770
18″ 0.219 5.563 18.000 457 61.948 41.588
0.250 6.350 70.593 47.393
0.281 7.137 79.208 53.176
0.312 7.925 20 87.792 58.939
0.375 9.525 STD 105.144 70.588
0.438 11.125 30 122.369 82.152
0.500 12.700 XHY 139.198 93.450
0.562 14.275 40 155.904 104.666
0.625 15.875 172.754 115.978
20″ 0.250 6.350 20.000 508 78.547 52.733
0.282 7.163 88.458 59.386
0.312 7.925 97.719 65.604
0.375 9.525 20 STD 117.075 78.598
0.438 11.125 136.305 91.508
0.500 12.700 30 XHY 155.106 104.130
0.594 15.088 40 183.378 123.110
0.625 15.875 192.640 129.328
0.688 17.475 211.368 141.901
24″ 0.250 6.350 24.000 610 94.456 63.413
0.281 7.137 106.029 71.183
0.312 7.925 117.573 18.932
0.375 9.525 20 STD 140.938 64.618
0.438 11.125 164.176 110.219
0.500 12.700 XHY 186.923 125.490
0.625 15.875 232.410 156.028
0.688 17.475 40 255.148 171.293
0.750 19.050 277.401 186.233
30″ 0.250 6.350 30.000 762 118.318 79.433
0.281 7.137 132.851 89.189
0.312 7.925 10 147.353 98.925
0.375 9.525 STD 176.731 118.648
0.438 11.125 205.983 138.286
0.500 12.700 20 XHY 234.647 157.530
0.625 15.875 30 292.066 196.078
0.688 17.475 320.817 215.380
0.750 19.050 348.988 234.293
36″ 0.250 6.350 36.000 914 142.180 95.453
0.281 7.137 159.672 107.196
0.312 7.925 10 177.133 118.918
0.375 9.525 STD 215.525 142.678
0.438 11.125 247.790 166.353
0.500 12.700 20 XHY 282.372 198.570
0.625 15.875 351.723 236.128
0.688 17.475 386.487 259.467
0.750 19.050 420.576 282.353
42″ 0.312 7.925 42.000 1067 206.914 138.911
0.375 9.525 STD 248.319 166.708
0.500 12.700 XHY 33.097 221.610
0.750 19.050 492.163 330.413
48″ 0.375 9.525 48.000 1219 STD 284.112 190.738
0.438 11.125 331.404 222.487
0.500 12.700 XHY 377.822 253.650
0.750 19.050 563.750 378.473
0.875 22.225 655.969 440.383

DIN 2.4856 round tube equivalent

STANDARD AFNOR WERKSTOFF NR. JIS UNS BS GOST EN
Inconel 625 NC22DNB4M 2.4856 NCF 625 N06625 NA 21 ХН75МБТЮ NiCr22Mo9Nb

Nickel 625 coiled tubing applications

  • Oil refining
  • Sheathing
  • Wellhead components
  • Heat exchangers
  • Control rod components
  • Chemical processing
  • Reactor core
  • Control and instrumentation tubes
  • Gas pipeline control lines

AMS 5581 Type 1 vs Type 2

The primary difference between AMS 5581 Tubing type 1 and type 2 is that

  • Type 1 is available in seamless and drawn construction.
  • Type 2 is available in welded and drawn condition.

Why are Inconel 625 tubing price high in USA compared to India?

India is one of the major producers and exporters of Inconel 625 Exhaust Tubing. The prices of the raw material and other manufacturing factors like labor are cheaper here. The USA imports them, with an additional cost which includes import duties. Even if the tubes are produced in USA, they will be priced higher as it is an expensive country. Thus, the price of the 625 tubing is higher in the USA compared to India.