ASTM B163 Inconel 718 Tube Suppliers, Alloy 718 Seamless Tubing Stockist

Excellent welding is one of the strongest properties of the alloy, according to leading Inconel 718 tube suppliers, and the alloy Inconel UNS N07718 heat exchanger tube can be welded either in the annealed state or in the aged state, and even when welding age-hardened material is necessary, the proper procedure helps to retain the properties constant even though welding age-hardened material might cause a softened heat-affected zone. ASW Nickel based alloys like ASTM B163 Inconel 718 tubing are suitable in strenuous condenser and heat-exchanger service, with the specification including outside diameter with either an average or minimum wall thickness as per ASTM B163 / AMS 5589 to make such tubes a good choice to implement in the critical Inconel heat exchanger and condenser tube applications.

In addition to dimensional tolerance, Alloy 718 tubing needs to meet all the furnishing and mechanical requirements in the standard such as tensile, yield strength, rounding, elongation, and rockwell hardness which are established through chemical analysis, stress checks, and grain size examination, rounding checks and hardness conversion and other rigorous testing on bright annealed tubes. One of the unique characteristics of this Gamma Prime strengthened alloy is that it has better mechanical strength between -423 degF and 1300 degF and high oxidation resistance at high temperature, thus Alloy 718 condenser and heat-exchanger tubes made following ASTM B163 are important in large-scale systems which require recovery of waste heat.

Process conditions, such as temperature, flow, viscosity, density, pressure, phase, and chemistry, are much more variable in such industries as wastewater treatment, nuclear power, petroleum refining, refrigeration and even wine and beer production, with the Inconel 718 seamless and welded tubes to provide reliable service in a process, long life and resistance to oxidation up to approximately 1800 degF. With subsequent adherence to ASTM B163 and ASME SB 163 UNS N07718 guidelines, and the incorporation of Inconel 718 tubing and other related products, including Inconel 718 pipes and other high-performance Inconel tubes, cost-efficient, energy-saving, and environmentally friendly heat-transfer solutions are attained by these systems.

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ASTM B163 Alloy 718 Tube Price

The following table provides indicative pricing for Inconel 718 Tubes by origin.

Origin Price in INR (₹) Price in USD ($) Price in Euro (€) Specification/Notes
India Rs 3,200/- per kg $46 per kg €39 per kg Cut to Size
Japan Rs 3,500/- per kg $51 per kg €43 per kg Fix Length
UK / Europe Rs 3,700/- per kg $54 per kg €46 per kg Fix Length
USA Rs 4,500/- per kg $65 per kg €56 per kg Fix Length

Table of Contents

What is Inconel 718 Tube?

Inconel 718 (Werkstoff Nr. 2.4668) is a nickel-based superalloy that is precipitation-hardened and is utilized where exceptionally high yield strength, tensile strength and good creep-rupture resistance is needed. It also has outstanding corrosion and oxidation protection and Inconel 718 electropolished tubing can be efficiently utilized up to approximately 1300degF (704degC) and remains reliable.

Inconel 718 Tube Types

We supply a diverse range of configurations to suit various industrial applications

ASTM B163 Alloy 718 electropolished tubes in bundled stock
ASTM B163 Alloy 718 Electropolished Tubes
Alloy 718 bright annealed tube bundle with clean metallic finish
Alloy 718 Bright Annealed Tube
Small diameter Inconel 718 tubing arranged in tight bundles
Small Diameter 718 Inconel Tubing
ASTM B516 Inconel 718 high pressure tubing stacked for dispatch
ASTM B516 Inconel 718 High Pressure Tubing
Inconel NCF 718 rectangular tubing with polished flat surface
Inconel NCF 718 Rectangular Tubing
Inconel Alloy 718 seamless tubes stored in metal rack
Inconel Alloy 718 Seamless Tube
Werkstoff 2.4668 Alloy 718 seamless tubing with smooth bore
2.4668 Alloy 718 Seamless Tubing
Nickel Alloy 718 electropolished tubing with reflective surface
Nickel Alloy 718 Electropolished Tubing
Inconel DIN 2.4668 ERW tubes in large round bundle
Inconel DIN NR. 2.4668 ERW Tube
Inconel 718 ERW tubing close up of welded ends
Inconel 718® ERW Tubing
ASTM B516 UNS N07718 welded tubes standing vertically
ASTM B516 UNS N07718 Welded Tube
718 Alloy round tubes with uniform outer diameter
718 Alloy Round Tube
Inconel UNS N07718 capillary tubes in fine bundle
Inconel UNS N07718 Capillary Tube
Inconel Werkstoff 2.4668 square tubing stacked together
Inconel WERKSTOFF NR. 2.4668 Square Tubing
718 Alloy square tube with sharp edges and bright finish
718 Alloy Square Tube
ASTM B163 Inconel 718 exhaust tubing with bent sections
ASTM B163 Inconel 718 Exhaust Tubing
ASTM B163 Alloy 718 tubes aligned in parallel rows
ASTM B163 Alloy 718 Tube
Alloy 718 tubing bundle with protective blue end caps
ASTM B163 Alloy 718 Tube
ASTM B516 Inconel 718 tubing with red plastic end covers
Alloy 718 Tubing
718 Inconel capillary tubing in tightly packed bundle
ASTM B516 Inconel 718 Instrument Tubing
718 Inconel Capillary Tubing
718 Inconel Capillary Tubing

ASTM B516 Inconel 718 Tube Specification

Parameter / Category Details & Specifications
STANDARDS & DIMENSIONS
Standards ASTM B163, ASTM B516 / ASME SB163, ASME SB516
Seamless Tube OD 3.35 mm to 101.6 mm
Welded Tube OD 6.35 mm to 152 mm
Wall Thickness 0.020" – 0.220" (Special thicknesses available)
Gauge (SWG) 10, 12, 14, 16, 18, 20 SWG
Length Single Random, Double Random, Standard & Cut Lengths
PROCESSING & FEATURES
Manufacturing Type Seamless, ERW, EFW, Welded, Fabricated, LSAW
Available Forms Round, Coil, Square, Rectangular, Boiler, Hydraulic, Straight, ‘U’ bent, Hollow
Surface Finish Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF (Mill Finish)
End Connections Plain End, Beveled End, Threaded
Product Marking Standard, Grade, OD, Thickness, Length, Heat No. (or Custom)
APPLICATIONS & SERVICES
Primary Applications Oil & Gas, Fluid Tube, Boiler, Heat Exchanger, Condenser
Specializations Capillary Tubes, Odd/Custom Sizes, High-Pressure Heat Exchangers
Value Added Services Draw & Expansion, Polishing (Electro/Commercial), Bending, Machining, Cutting, Grooving
Testing & Certification MTC (Manufacturer Test Certificate), Govt. Lab Certificate, Third Party Inspection
APPROVED MANUFACTURERS
Japan Origin Sumitomo Metals, Nippon Steel Corp, Kobe Special Tube, Sanyo Special Steel
Europe Origin Tubacex Tubos Inoxidables (Spain), Schoeller Bleckmann (Austria)
Top Suppliers in India  Solitaire Overseas and Amardeep Steel

Inconel 718 Tubing Standards

Standard Country Description
ASTM USA American Society of Mechanical Engineers 
AISI USA Acronym of American Iron and Steel Institute 
JIS JP Japanese Industrial Standards 
DIN GER Deutsches Institut für Normung 
UNS USA Unified Numbering System 

ASTM B516 Inconel 718 Welded Tube Size Chart

Wall Thickness (Inch) Available Outside Diameter (O.D.) Sizes
0.010" 1/16" , 1/8" , 3/16"
0.012" 1/8"
0.016" 1/8" , 3/16"
0.020" 1/16" , 1/8" , 3/16" , 1/4" , 5/16" , 3/8"
0.028" 1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 3/4" , 1" , 1 1/2" , 2"
0.035" 1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16"*, 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 2", 2 1/4"
0.049" 3/16", 1/4", 5/16", 3/8", 1/2", 9/16"*, 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 1/2", 1 5/8", 2", 2 1/4"
0.065" 1/4", 5/16", 3/8", 1/2", 9/16"*, 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 1 3/4", 2", 2 1/2", 3"
0.083" 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 1 7/8", 2", 2 1/2", 3"
0.095" 1/2" , 5/8" , 1" , 1 1/4" , 1 1/2" , 2"
0.109" 1/2" , 3/4" , 1" , 1 1/4" , 1 1/2" , 2"
0.120" 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 2" , 2 1/4" , 2 1/2" , 3"
0.125" 3/4" , 1" , 1 1/4" , 1 1/2" , 2" , 3" , 3 1/4"
0.134" 1"
0.250" 3"
0.375" 3 1/2"
Tube Type Outside Diameter (O.D.) Range Wall / Schedule Length
NB Sizes (Stock) 1/8” to 8” SCH 5, 10, 40, 80, 160 Up to 6 Meters
Seamless Tube 5.0 mm to 203.2 mm Custom / As per req Up to 6 Meters
Welded Tube 5.0 mm to 1219.2 mm 1.0 mm to 15.0 mm Up to 6 Meters

Inconel 718 Seamless Tubes Surface Finish

Finish Type Description Internal Surface (ID) RA External Surface (OD) RA
AP Annealed & Pickled Not Defined 40 μin (1.0 μm) or Not Defined
BA Bright Annealed 40, 32, 25, 20 μin (1.0, 0.8, 0.6, 0.5 μm) 32 μin (0.8 μm)
MP Mechanical Polish 40, 32, 25, 20 μin (1.0, 0.8, 0.6, 0.5 μm) 32 μin (0.8 μm)
EP Electro Polish 15, 10, 7, 5 μin (0.38, 0.25, 0.20, 0.13 μm) 32 μin (0.8 μm)

Inconel 718 Tubing Composition & Technical Information

Chemical Composition

Standard: WERKSTOFF NR. 2.4668 / Inconel 718

Grade Ni (Nickel) Cr (Chromium) C (Carbon) Mn (Manganese) Si (Silicon) S (Sulfur) Cu (Copper)
Inconel 718 50.00 - 55.00% 17.00 - 21.00% 0.08% max 0.35% max 0.35% max 0.015% max 0.30% max

Inconel 718 Tubing Mechanical Properties

Property Value Unit Conversion
Density 8.2 g/cm3 -
Melting Point 1350∘C 2460∘F
Tensile Strength 135,000 Psi 930 MPa
Yield Strength (0.2% Offset) 75,000 Psi 482 MPa
Elongation 45% -

Mechanical Properties by Temper

Condition: For Tube sizes 0.125" OD or larger, with 0.015" wall or heavier

Alloy Temper Tensile Strength (KSI) Yield Strength (KSI) Min. Elongation (2") Rockwell Hardness
718 Annealed 155 max 40 - 85 30% -
718 Half Hard 140 - 190 90 - 150 7% C 25 - C 38
718 Full Hard 140 min 140 min 3% C 35 min

Alloy 718 Tube Physical Properties

Property Solution Treated Solution Treated and Aged
Density 0.296 lb/in3 (8.192 g/cm3) 0.297 lb/in3 (8.22 g/cm3)
Specific Gravity 8.19 8.22
Melting Range 2500−2600∘F 1370−1430∘C

Read our complete blog on Inconel Composition, Properties and Applications

Alloy 718 ERW Tube Sizes

We offer a vast range of ERW tube sizes based on wall thickness and outside diameter (OD).

Wall Thickness (Inch) Available Outside Diameter (O.D.) Sizes
0.010" 1/16" , 1/8" , 3/16"
0.012" 1/8"
0.016" 1/8" , 3/16"
0.020" 1/16" , 1/8" , 3/16" , 1/4" , 5/16" , 3/8"
0.028" 1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 3/4" , 1" , 1 1/2" , 2"
0.035" 1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 2", 2 1/4"
0.049" 3/16", 1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 1/2", 1 5/8", 2", 2 1/4"
0.065" 1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 1 3/4", 2", 2 1/2", 3"
0.083" 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 1 7/8", 2", 2 1/2", 3"
0.095" 1/2" , 5/8" , 1" , 1 1/4" , 1 1/2" , 2"
0.109" 1/2" , 3/4" , 1" , 1 1/4" , 1 1/2" , 2"
0.120" 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 2" , 2 1/4" , 2 1/2" , 3"
0.125" 3/4" , 1" , 1 1/4" , 1 1/2" , 2" , 3" , 3 1/4"
0.134" 1"
0.250" 3"
0.375" 3 1/2"

Inconel UNS N07718 Tube Stock

Below is our readily available stock of small diameter Inconel 718 Tube

Feature Seamless Product Welded Product
Standard AMS 5589 / ASTM B163 AMS 5596 / ASTM B516
Wall Thickness .028" through .095" .035" through .080"
Outer Diameter (OD) .250" through 2" 1" OD through 7" OD

Inconel NCF 718 Tube Pressure Rating

The following table indicates the Working Pressure (psig) for various tube dimensions.

Tube O.D. (in.) 0.028" Wall 0.035" Wall 0.049" Wall 0.065" Wall 0.083" Wall 0.095" Wall 0.109" Wall 0.120" Wall
1/8" 7,900 10,100 - - - - - -
1/4" 3,700 4,800 7,000 9,500 - - - -
5/16" - 3,700 5,400 7,300 - - - -
3/8" - 3,100 4,400 6,100 - - - -
1/2" - 2,300 3,200 4,400 - - - -
3/4" - - 2,200 3,000 4,000 4,600 - -
1" - - - 2,200 2,900 3,400 3,900 4,300

Alloy 718 Tubing Applications

Within the industry , the Inconel 718 steel tubes are popular where elements have to withstand the pressure of high temperature and corrosive chemicals in long service durations. Common uses are cracking furnace tubes and catalytic reactor coils in petrochemical plants, high temperature medium transmission lines and high density bundle of heat-exchange tubes in process heaters and boilers. They also serve as structural pipes of fixtures, high temperature related connecting pipes of gas turbine waste-heat boilers and other sensitive petrochemical apparatus where dependability and thermal stability are valued.

Equivalent Grades for Inconel 718 Seamless and Welded Tubes

Standard WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
Inconel 718 2.4668 N07718 NCF 718 – – – –

What is the Difference Between Inconel and Incoloy ?

The primary distinction between Inconel and Incoloy is their composition and hence their performance. Its mainly nickel-chromium alloy that is approximately 50 percent or higher nickel content makes it very strong and resistant to oxidation that happens at very high temperatures. Incoloy is a nickel-iron-chromium alloy containing less than 50% nickel which makes it cheaper and more applicable to high-temperature applications where corrosion, but not extreme heat is the main consideration.

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ASTM B163 Inconel 718 Seamless Tube Weight chart

OD (in) Wall (in) D/t Ratio ID (in) Cross Section Area (in²) Internal Area (in²)
0.250 0.020 12.50 0.210 0.0145 0.0346
0.250 0.028 8.93 0.194 0.0195 0.0296
0.250 0.035 7.14 0.180 0.0236 0.0254
0.250 0.049 5.10 0.152 0.0309 0.0181
0.250 0.065 3.85 0.120 0.0378 0.0113
0.375 0.020 18.75 0.335 0.0223 0.0881
0.375 0.028 13.39 0.319 0.0305 0.0799
0.375 0.035 10.71 0.305 0.0374 0.0731
0.375 0.049 7.65 0.277 0.0502 0.0603
0.375 0.065 5.77 0.245 0.0633 0.0471
0.500 0.020 25.00 0.460 0.0302 0.1662
0.500 0.028 17.86 0.444 0.0415 0.1548
0.500 0.035 14.29 0.430 0.0511 0.1452
0.500 0.049 10.20 0.402 0.0694 0.1213
0.500 0.065 7.69 0.370 0.0888 0.1075
0.500 0.083 6.02 0.334 0.1087 0.0876
0.625 0.020 31.25 0.585 0.0380 0.2688
0.625 0.028 22.32 0.569 0.0525 0.2543
0.625 0.035 17.86 0.555 0.0649 0.2419
0.625 0.049 12.76 0.527 0.0887 0.2181
0.625 0.065 9.62 0.495 0.1144 0.1924
0.625 0.083 7.53 0.459 0.1413 0.1655
0.625 0.095 6.58 0.435 0.1582 0.1486
0.625 0.109 5.73 0.407 0.1767 0.1301
0.750 0.028 26.79 0.694 0.0635 0.3783
0.750 0.035 21.43 0.680 0.0786 0.3632
0.750 0.049 15.31 0.652 0.1079 0.3339
0.750 0.065 11.54 0.620 0.1399 0.3019
0.750 0.083 9.04 0.584 0.1739 0.2679
0.750 0.095 7.89 0.560 0.1955 0.2463
0.750 0.109 6.88 0.532 0.2195 0.2223
0.750 0.120 6.25 0.510 0.2375 0.2043
0.875 0.020 43.75 0.835 0.0537 0.5476
0.875 0.028 31.25 0.819 0.0745 0.5268
0.875 0.035 25.00 0.805 0.0924 0.5090
0.875 0.049 17.86 0.777 0.1272 0.4742
0.875 0.065 13.46 0.745 0.1654 0.4359
0.875 0.083 10.54 0.709 0.2065 0.3948
0.875 0.095 9.21 0.685 0.2328 0.3685
0.875 0.109 8.03 0.657 0.2623 0.3390
0.875 0.120 7.29 0.635 0.2846 0.3167
1.000 0.028 35.71 0.944 0.0855 0.6999
1.000 0.035 28.57 0.930 0.1061 0.6793
1.000 0.049 20.41 0.902 0.1464 0.6390
1.000 0.065 15.38 0.870 0.1909 0.5945
1.000 0.083 12.05 0.834 0.2391 0.5463
1.000 0.095 10.53 0.810 0.2701 0.5153
1.000 0.109 9.17 0.782 0.3051 0.4803
1.000 0.120 8.33 0.760 0.3318 0.4536
1.000 0.134 7.46 0.732 0.3646 0.4208
1.250 0.035 35.71 1.180 0.1336 1.0936
1.250 0.049 25.51 1.152 0.1849 1.0423
1.250 0.065 19.23 1.120 0.2420 0.9852
1.250 0.083 15.06 1.084 0.3161 0.9229
1.250 0.095 13.16 1.060 0.3447 0.8825
1.250 0.109 11.47 1.032 0.3907 0.8365
1.250 0.120 10.42 1.010 0.4260 0.8012
1.250 0.134 9.33 0.982 0.4698 0.7574
1.500 0.035 42.86 1.430 0.1611 1.6061
1.500 0.049 30.61 1.402 0.2234 1.5438
1.500 0.065 23.08 1.370 0.2930 1.4741
1.500 0.083 18.07 1.334 0.3695 1.3977
1.500 0.095 15.79 1.310 0.4193 1.3478
1.500 0.109 13.76 1.282 0.4763 1.2908
1.500 0.120 12.50 1.260 0.5202 1.2469
1.500 0.134 11.19 1.232 0.5750 1.1921
1.500 0.148 10.14 1.204 0.6286 1.1385
1.750 0.035 50.00 1.680 0.1886 2.2167
1.750 0.049 40.82 1.902 0.3003 2.8413
1.750 0.065 26.92 1.620 0.3441 2.0612
1.750 0.083 21.08 1.584 0.4347 1.9706
1.750 0.095 18.42 1.560 0.4939 1.9113
1.750 0.109 16.06 1.532 0.5619 1.8433
1.750 0.120 14.58 1.510 0.6145 1.7908
1.750 0.134 13.06 1.482 0.6803 1.7250
1.750 0.148 11.82 1.454 0.7449 1.6604
1.750 0.165 10.61 1.420 0.8216 1.5837
2.000 0.035 57.14 1.930 0.2161 2.9255
2.000 0.049 40.82 1.902 0.3003 2.8413
2.000 0.065 30.77 1.870 0.3951 2.7465
2.000 0.083 24.10 1.834 0.4999 2.6417
2.000 0.095 21.05 1.810 0.5685 2.5730
2.000 0.109 18.35 1.782 0.6475 2.4941
2.000 0.120 16.67 1.760 0.7087 2.4328
2.000 0.134 14.93 1.732 0.7855 2.3561
2.000 0.148 13.51 1.704 0.8611 2.2805
2.000 0.165 12.12 1.670 0.9512 2.1904

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