ASME SB 729 UNS N08020 Tubing & ASTM B468 Alloy 20 Welded Tube supplier

Alloy 20 or carpenter 20 is an alloy that is classified under super austenitic stainless steel. Well-liked for general corrosive service, this stainless steel grade is highly rated by most Alloy 20 Tube suppliers. Primarily this alloy was developed as a means to counter corrosion problems associated with sulfuric acid. Unlike regular stainless steel and steel grades, the UNS N08020 Tube displays superior resistance to sulfuric acid, particularly when placed in aggressive environments, which could cause failure of the more conventional austenitic alloys.

Apart from sulfuric acid, Alloy 20 Seamless Tubing exhibits good resistance to general corrosion when exposed to applications that contain chlorides or acids like sulfuric acid, nitric acid & phosphoric acid. During the production of the alloy, some amount of niobium is added to it. Niobium has a stabilizing effect on the Carpenter 20 Tubing against sensitization as well as from the resultant decay by intergranular corrosion. The weldability properties are also superior of the Alloy 20 Welded Tubes. They could be furnished in any one of the following conditions - solution annealed condition or stabilized annealed condition or in an annealed condition. Testing the ASME SB 729 UNS N08020 tubes for elongation, yield and tensile strength is an important requirement. Moreover, each specimen or component belonging to the ASTM B729 UNS N08020 are subjected to tests like the hydrostatic test or a nondestructive electric test. The ease in fabrication, with excellent resistance to corrosion in combination with its magnified mechanical properties, makes the Alloy 20 Tubing a valued addition for applications like heat exchangers, Chemical and petroleum processing equipment or for several process-based industries.

ASME B31.3/ ASME B31.1 / ASTM B468 Alloy 20 Tubing for 20 000 psi working pressures

Alloy 20 Tube

Alloy 20 Tube

ASTM B729 UNS N08020

ASTM B729 UNS N08020

Alloy 20 Seamless Tubing

Alloy 20 Seamless Tubing

Alloy 20 Tube Inventory Size Ranges

Buy 1/4, 3/8, 1/2 Inch Od Carpenter 20 Tubing at lowest price ex Mumbai

Alloy 20 Seamless Tube

  • Size (OD): .375" through 1" OD
  • Wall Thickness : .035" through .065"

Alloy 20 Welded Tube

  • Size (OD): .125" OD through 1" OD
  • Wall Thickness : .035" through .109" wall

UNS N08020 Alloy 20 Seamless Tube Specification

Various wall thickness in Alloy 20 Welded Tubes used for gas service

Alloy 20 Tube International Specification ASTM B729, ASME SB 729, ASTM B468 ASME SB 468
Standard Specification of Alloy 20 Tubing GB, EN, DIN, DS, DTD, ASTM, SAE, ASME, AISI, JIS, TOCT, NF, AMS
UNS N08020 Alloy 20 Tube Standard Tolerances +/- 0.030; tolerance may vary depending on grade and thickness
Alloy 20 Seamless Tube Size
  •  15 NB to 150 NB IN
  • 1/2" OD - 12" OD
UNS N08020 Alloy 20 Welded Tube Size
  •  1/2" OD - 12" OD
  • Guage: 25 SWG - 10 SWG
Alloy 20 UNS 8020 Tube Length Upto 30 meters, Single Random, Double Random & Required Length End: Plain End, Beveled End, Treaded, or Custom Cut Lengths
Alloy 20 UNS N08020 Tube WT 0.40 mm - 12.70 mm
Alloy 20 N08020 Tube Schedule 5, 10S, 10, 30, 40S, 40, 80, 80S, XS, 160, XXH
Nickel Alloy 8020 Tube Swg & Bwg 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
ASTM B468 Alloy 20 Grade Tubes manufacturing techniques EFW, CDW, ERW, LSAW, DOM, Fabricated, Seam-Welded, Seamless, CEW, Redrawn, Welded
Origin of Alloy 20 N08020 Tube material Indian, European, Korean, Japanese
ASME SB 729 UNS N08020 Tube End Types
  • BLE : Bevel large end
  • BBE : Bevel both ends
  • PBE = Plain Both Ends
  • BSE : Bevel small end
  • BE : Bevelled end
  • TOE / POE = Treaded One End / Plain One End
  • TOE / BOE = Treaded One End / Bevelled One End
  • TBE = Treaded Both Ends
  • POE / BOE = Plain One End / Bevelled One End
Alloy 20 UNS N08020 Tube End Finish low-burr, burr-free, brushed, trovalised
ASTM B468 Alloy 20 Grade Tubes Form Round, Square, Oval, Rectangular, Coil, "U" Shape, Hydraulic & Honed Tubes
Nickel Alloy 20 Tube Delivery Condition
  • Welded, calibrated
  • Welded and redrawn
  • Seamlessly drawn
  • Polished
  • Annealed and Pickled
  • Hot Finished
  • Bright Annealed
  • Cold Drawn
Alloy 20 Inconel Tube Packing
  • Ply Wooden Boxes
  • PE Fabric Bundles
  • Steel Strips Bundled
  • Standard seaworthy export packing
  • Plastic Bags, or as required
Carpenter Alloy 20cb3 Tube Value Added Services Cut to size, thread, and groove
Currently exporting to

For quick delivery of Alloy 20 Tube, contact our sales representative in following locations:

  • Germany
  • Singapore
  • Indonesia
  • Saudi Arabia
  • Australia
  • UAE
  • Korea
  • Vietnam
  • Qatar
  • Malaysia
  • UK
  • USA
  • Philippines
  • Nigeria and many others
Port Mumbai, India
Stocking distributor of leading Alloy 20 Tube manufacturers
  • Sanyo Special Steel, Japan make Alloy 20 Tube
  • Schoeller Bleckmann, Austria make UNS N08020 Alloy 20 Seamless Tube
  • Nippon Steel Corporation, Japan make Alloy 20 N08020 Tube
  • Sumitomo Metals, Japan make Nickel Alloy 8020 Tubes
  • Seah Steel Corporation, Korea make Alloy 20 UNS N08020 Seamless Tube
  • Kobe Special Tube, Japan make ASTM B468 Alloy 20 Grade Tubing
  • Tubacex Tubos Inoxidables S.A., Spain make Alloy 20 N08020 Tubes
Carpenter Alloy 20cb3 Tube Dimensional Specification ANSI/ ASME B36.10, B36.19, B2.1
Marking on 20cb3 Carpenter 20 Tube
  • Specification
  • Material Grade
  • Nominal Size
  • Schedule or Wall Thickness
  • Method of Manufacturing (Seamless or Welded)
  • Heat Number
  • Manufacturer’s Name or Custom Logo - on request
Marked Tube Sample:
SEAMLESS TUBE ASTM B729 UNS N08020 12" NB SCH 40S HEAT NO. XXXX
WELDED TUBE ASTM B468 UNS N08020 20" NB SCH 40S HEAT NO. XXXX
Application wise types of Alloy 20 N08020 Tubes ASME SB 729 UNS N08020 Oil Tube, Gas Tube, Fluid Tube, Boiler and Alloy 20 UNS 8020 Heat exchanger Tube

Alloy 20 N08020 Tubing Testing procedure

  • Mill Test Certificates with all Alloy 20 Tube
  • Raw Materials Certificate
  • Moisture testing
  • HS Code Commercial Invoice
  • EN 10204/3.1B, EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
  • Non Destructive Test Reports
  • Chemical Reports
  • 100% inspection according to NACE standards
  • PMI Test Reports
  • Visual Inspection Reports
  • Third Party Inspection for Alloy 20 Tubing
  • Fumigation Certificates
  • Destructive Test Report
  • Form A for Generalized System of Preferences (GSP)
  • 100% Radiography Test Report for Alloy 20 UNS N08020 Tube
  • Laboratory Test Certificate from Govt. Approved Lab
  • NABL Approved Lab Reports
  • Heat Treatment Charts
  • Surface roughness measurement
  • Mechanical Reports

Nickel Alloy 8020 Tube Price in India

Fully annealed seamless, welded and drawn Alloy 20 Tube supplier

ASME B36.10, ASTM B729 UNS N08020 Alloy 20 Seamless Tube INR 22,100/ MTR

Contact us for Free quote and sample, you can also mail us on export@oshwin.com.

Types of Alloy 20 Tube

Alloy 20 Welded Tube

Alloy 20 Welded Tube

UNS N08020 Alloy 20 Seamless Tube

UNS N08020 Alloy 20 Seamless Tube

Alloy 20 N08020 Round Tube

Alloy 20 N08020 Round Tube

Nickel Alloy 8020 Rectangular Tube

Nickel Alloy 8020 Rectangular Tube

Alloy 20 UNS N08020 Square Tube

Alloy 20 UNS N08020 Square Tube

ASTM B468 Alloy 20 Grade Schedule 5S Tube

ASTM B468 Alloy 20 Grade Schedule 5S Tube

Alloy 20 N08020 Schedule 40S Seamless Tube

Alloy 20 N08020 Schedule 40S Seamless Tube

ASME SB 729 UNS N08020 Polished Tube

ASME SB 729 UNS N08020 Polished Tube

Alloy 20 UNS 8020 Exhaust Tubing

Alloy 20 UNS 8020 Exhaust Tubing

Nickel Alloy 20 Heat Exchanger Tube

Nickel Alloy 20 Heat Exchanger Tube

Alloy 20 Inconel Boiler Tube

Alloy 20 Inconel Boiler Tube

Carpenter Alloy 20cb3 Capillary Tube

Carpenter Alloy 20cb3 Capillary Tube

20cb3 Carpenter 20 Gas Tube

20cb3 Carpenter 20 Gas Tube

Carpenter 20 ASTM B729 UNS N08020 ERW Tube

Carpenter 20 ASTM B729 UNS N08020 ERW Tube

2.4660 Alloy 20 EFW Tube

2.4660 Alloy 20 EFW Tube

20cb3 Alloy 20 SCH 40 Seamless Tube

20cb3 Alloy 20 SCH 40 Seamless Tube

20cb3 Carpenter 20 Precision Tubes

20cb3 Carpenter 20 Precision Tubes

Carpenter 20 ASTM B729 UNS N08020 Coiled Tube

Carpenter 20 ASTM B729 UNS N08020 Coiled Tube

2.4660 Alloy 20 Condenser Tube

2.4660 Alloy 20 Condenser Tube

20cb3 Alloy 20 Instrument Tubing

20cb3 Alloy 20 Instrument Tubing

Complete range of Alloy 20 UNS N08020 Tubes

Nickel Alloy 8020 Coil Tubes 20cb3 Carpenter 20 Tube Bends
Alloy 20 UNS N08020 Instrumentation Tubing Carpenter 20 ASTM B729 UNS N08020 Dom Tubing
High Pressure ASTM B468 Alloy 20 Grade Tube 12mm 2.4660 Alloy 20 Tubing
Alloy 20 N08020 Heat exchanger Tube 20cb3 Alloy 20 Elliptical and Oval Tubes
Alloy 20 N08020 Instrument Tubing 20cb3 Alloy 20 Round Tubing
ASME SB 729 UNS N08020 Square Tube Alloy 20 Square Tubing
Alloy 20 UNS 8020 Exhaust Tubing UNS N08020 Alloy 20 Round Tubes
Alloy 20 UNS N08020 Coiled Tubing Alloy 20 N08020 Gas Tubes
ASME SB 729 UNS N08020 Condenser Tubing ASTM B468 Alloy 20 Grade Triangle Tubes
Thin Wall Alloy 20 UNS 8020 Tubing Cold Drawn Alloy 20 Seamless Tubing
Nickel Alloy 20 Polish Tubing UNS N08020 Alloy 20 Finned Tubes
Alloy 20 Inconel Sanitary Tubing Alloy 20 N08020 Hollow Tubes
1 inch Carpenter Alloy 20cb3 Tubing Re Drawn Nickel Alloy 8020 Tubing
Alloy 20 Seamless Tube Nickel Alloy 20 Rectangular Tubing
UNS N08020 Alloy 20 Electropolish Tubing Alloy 20 Inconel Electropolished Tube
Alloy 20 N08020 ERW Tubes Carpenter Alloy 20cb3 Small Diameter Tubing
Nickel Alloy 8020 Capillary Tubing 20cb3 Carpenter 20 High Pressure Tubes
Alloy 20 UNS N08020 Hydraulic Tubing Carpenter 20 ASTM B729 UNS N08020 EFW Tubing
ASTM B468 Alloy 20 Grade Welded Tube 2.4660 Alloy 20 ERW Tubing

ASTM B468 Alloy 20 Grade Boiler Tube Suitable Temperature

Hot working 950 °C (1740 °F)
Annealing 1725°F and 1850°F

Product Form
& Condition
Maximum Temperature Limits of Alloy 20 and ASME BPVC Applicability (°F)
I
Power Boilers
III
Nuclear Facility Components
VIII-1
Pressure Vessels
XII
Transport Tanks
ASTM B462 UNS N08020 forgings NP 800 800 650
ASTM B462 UNS N08020 forgings NP NP 800 650
ASTM B463 UNS N08020 Plate NP NP 800 650
ASTM B463 UNS N08020 Plate NP 800 800 650
ASTM B473 UNS N08020 bars NP 800 800 650
ASTM B473 UNS N08020 bars NP NP 800 650
ASTM B729 Alloy 20 seamless tube NP NP 800 650
ASTM B729 Alloy 20 seamless tube NP NP 800 650
ASTM B464 Alloy 20 welded pipe NP 800 NP NP
ASTM B464 Alloy 20 welded pipe NP NP 800 650
ASTM B464 Alloy 20 welded pipe NP NP 800 650
ASTM B468 Alloy 20 welded tube NP 800 NP NP
ASTM B468 Alloy 20 welded tube NP NP 800 650
ASTM B468 Alloy 20 welded tube NP NP 800 650
ASTM B366 Alloy 20 Fittings NP NP 800 650

*NP: not permitted

Alloy 20 N08020 Heat Exchanger Tube Finishes and Coatings

  • Thin Film Engineered Polymer Coatings
  • Curran 1000 T Hybrid Epoxy
  • Phenol Epoxy
  • Novolac Epoxy
  • Curralon ®
  • Epoxy coating
  • Sakaphen- Shell and tube heat exchanger lining
  • High Functionality Epoxy - Curran Coating
  • Curran 1000T

ASME SB 729 UNS N08020 Square Tube size and weight

Dimensions Wall Weight per Dimensions Wall Weight per
(mm) (mm) metre (kg) (mm) (mm) metre (kg)
12.7 x 12.7 1.20 0.44 40 x40 1.20 1.49
12.7 x 12.7 1.50 0.55 40 x40 1.50 1.85
15 x 15 1.20 0.53 40 x40 2.00 2.45
15 x 15 1.50 0.65 40 x40 3.00 3.75
20 x 20 1.20 0.71 50 x50 1.50 2.32
20 x 20 1.50 0.88 50 x50 2.00 3.08
20 x 20 2.00 1.19 50 x50 3.00 4.65
25 x 25 1.20 0.92 60 x60 2.00 3.71
25 x 25 1.50 1.14 60 x60 3.00 5.49
25 x 25 2.00 1.49 70 x70 3.00 6.53
25 x 25 3.00 2.20 80 x80 2.00 4.98
30 x 30 1.20 1.10 80 x80 3.00 7.53
30 x 30 1.50 1.37 100 x 100 2.00 6.40
30 x 30 2.00 1.84 100 x 100 3.00 9.53
30 x 30 3.00 2.72

Alloy 20 UNS 8020 Capillary Tube Size Chart

Gauge Outside Diameter Tolerance mm Regular Wall (RW) mm Thin Wall (TW) mm Extra Thin Wall (XTW) mm Ultra Thin Wall (UTW) mm
30 0.304 - 0.317 0.064 - 0.089
29 o.330 - 0.342 0.064 - 0.089
28 0.355 - 0.368 0.076 - 0.102
27 0.406 - 0.419 0.089 - 0.115 0.064 - 0.089
26 0.457 - 0.469 0.089 - 0.114
25 0.508 - 0.520 0.115 - 0.140 0.089 - 0.114
24 0.558 - 0.571 0.114 - 0.140 0.089 - 0.114 0.051 - 0.102
23 0.635 - 0.647 0.140 - 0.165 0.089 - 0.114 0.051 - 0.102
22 0.711 - 0.723 0.140 - 0.165 0.096 - 0.121 0.077 - 0.102 0.051 - 0.102
21 0.812 - 0.825 0.140 - 0.165 0.102 - 0.127 0.051 - 0.102
20 0.901 - 0.914 0.108 - 0.165 0.108 - 0.134
19 1.054 - 1.079 0.166 - 0.216 0.102 - 0.140 0.070 - 0.108
18 1.257 - 1.282 0.191 - 0.241 0.127 - 0.165 0.083 - 0.121 0.051 - 0.102
17 1.460 - 1.485 0.177 - 0.229 0.115 - 0.152 0.083 - 0.127 0.057 - 0.102
16 1.638 - 1.663 0.204 - 0.254 0.127 - 0.165 0.096 - 0.133 0.070 - 0.121
15 1.816 - 1.841 0.204 - 0.254 0.127 - 0.165 0.096 - 0.134 0.070 - 0.121
14 2.082 - 2.133 0.216 - 0.292 0.165 - 0.229 0.114 - 0.165 0.076 - 0.134
13 2.387 - 2.438 0.267 - 0.343 0.191 - 0.267
12 2.743 - 2.749 0.267 - 0.321
11 3.023 - 3.073 0.293 - 0.368 0.216 - 0.292
10 3.378 - 3.429 0.318 - 0.394 0.216 - 0.292

N.B (a) Any intermediate size can be supplied on request.
(b) Supplied in sufficiently hard condition and also tested for the stiffness.

Nickel Alloy 20 Exhaust Tubing Gauge Thickness

GAUGE THICKNESS RANGE (INCH) TYPICAL VALUE (INCH)
22 0.025 - 0.029 0.028
20 0.031 - 0.035 0.035
19 0.038 - 0.042 0.042
18 0.044 - 0.049 0.049
17 0.053 - 0.058 0.058
16 0.060 - 0.065 0.065
15 0.066 - 0.074 0.072
14 0.075 - 0.085 0.083
13 0.087 - 0.097 0.095
12 0.101 - 0.111 0.109
11 0.112 - 0.122 0.12
10 0.126 - 0.136 0.134
9 0.140 - 0.150 0.148
8 0.157 - 0.167 0.165
7 0.175 - 0.185 0.18

Alloy 20 Inconel Welded Tube Tolerances

  • Straightness: .030" in 3"
  • Wall Tolerance +/- 10%
O.D. Inches Wall Thickness Inches O.D. +/- Inches
1/2" to 1" incl. .025 to .065 .005
Over .065 to .134 .010
1 to 1-1/2" incl. .025 to .065 .008
Over .065 to .134 .010
1-1/2" to 2" incl. .025 to .049 .010
Over .049 to .083 .011
Over .083 to .148 .012
2" to 2-1/2" incl. .032 to .065 .012
Over .065 to .109 .013
Over .109 to .165 .014
2-1/2" to 3-1/2" incl. .032 to .165 .014
Over .165 to .220 .020
3-1/2" to 5" incl. .083 to .165 .020
Over .165 to .220 .025

Carpenter Alloy 20cb3 Round Tube Value Added Services

  • We cut Alloy 20 welded tubing to your exact dimension
  • UNS N08020 Alloy 20 Tubing can be polished per customer specification
  • Beveling Alloy 20 N08020 tubes
  • Heat treating & annealing
  • Honing/ turning process for Alloy 20 Tube
  • Additional positive material identification (PMI) testing if required
  • Ultrasonic Testing (UT)

20cb3 Carpenter 20 Seamless Tube Chemical Composition

Alloy 20 Ni C Mo Mn Si Fe Cu S P Cr
32 – 38 0.02 max 2 – 3 1 – 2 0.7 max Bal 3 – 4 0.005 max 0.02 max 19 – 21

ASTM B729 UNS N08020 Alloy 20 Tube Mechanical Properties

Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
8.1 g/cm3 1443 °C (2430 °F) Psi – 35000 , MPa – 241 Psi – 80000 , MPa – 551 30 %

2.4660 Alloy 20 Tube Equivalent specification

ALLOY UNS WERKSTOFF NR. AFNOR EN JIS BS GOST
Alloy 20 N08020 2.4660 Z2NCUD31-20AZ NiCr20CuMo