UNS N08020 Pipes & Tubes Manufacturer and Supplier in India

UNS N08020 Pipes & Tubes

UNS N08020 Pipes & Tubes, commonly identified as Alloy 20 or 20Cb-3, are nickel-iron-chromium alloy products developed for demanding chemical processing and acid-handling services. The composition of the grade is about 32–38% nickel, 19–21% chromium, 2–3% molybdenum and 3–4% copper with niobium as stabiliser. This combination offers excellent resistance to both sulfuric acid and chloride-related attack, crevice corrosion and pitting corrosion. The alloy 20 is very convenient when a standard stainless steel is not enough to offer the necessary corrosion resistance. To meet applicable ASTM specifications, seamless and welded pipes and tubes can be provided for process equipment and piping systems. Amardeep Steel manufactured and supplied UNS N08020 Pipes & Tubes for aggressive chemical and corrosive industrial applications.

Specifications of UNS N08020 Pipes and Tubes

Parameter

Details

Grade

UNS N08020, Alloy 20, 20Cb-3, W.Nr 2.4660

Seamless pipe and tube

ASTM B729 / ASME SB729

Welded pipe

ASTM B464 / ASME SB464

Welded tube

ASTM B468 / ASME SB468

Electric fusion welded pipe

ASTM B474 / ASME SB474

Pipe sizes

1/2" to 8" NB seamless, larger as welded; SCH 5S, 10S, 40S, 80S

Tube sizes

6.35 mm to 50.8 mm OD, 0.89 mm to 2.77 mm wall

Condition

Stabilised annealed

Ends

Plain end, bevelled end

Length

Single random, double random, cut to length

Certification

EN 10204 3.1, 3.2 with third party inspection on request

Chemical Compositions of UNS N08020 Pipes and Tubes

Element

UNS N08020 (%)

Nickel (Ni)

32.0 to 38.0

Chromium (Cr)

19.0 to 21.0

Molybdenum (Mo)

2.0 to 3.0

Copper (Cu)

3.0 to 4.0

Niobium + Tantalum (Nb + Ta)

8 x C min, 1.00 max

Carbon (C)

0.07 max

Manganese (Mn)

2.00 max

Silicon (Si)

1.00 max

Phosphorus (P)

0.045 max

Sulphur (S)

0.035 max

Iron (Fe)

Balance

UNS N08020 Pipes and Tubes Mechanical Properties

Property (stabilised annealed, ASTM B729)

Value

Tensile strength, min

550 MPa (80 ksi)

Yield strength (0.2% offset), min

240 MPa (35 ksi)

Elongation in 50 mm, min

30%

Physical Properties of UNS N08020 Pipes and Tubes

Property

Typical value

Density

8.08 g/cm³ (0.292 lb/in³)

Specific heat (0°C to 100°C)

500 J/kg·K

Thermal conductivity (100°C)

About 13 W/m·K

Mean thermal expansion (25°C to 100°C)

14.7 µm/m·°C

Modulus of elasticity

200 GPa

Magnetic permeability (annealed)

Below 1.02 (essentially non-magnetic)

Equivalent Grades of UNS N08020 Pipes and Tubes

Standard

Designation

UNS

N08020

Werkstoff Nr.

2.4660

EN / DIN name

NiCr20CuMo

Common names

Alloy 20, 20Cb-3, Carpenter 20

ASTM pipe / tube

B729 (seamless), B464 (welded pipe), B468 (welded tube), B474 (EFW pipe)

Weight Chart of 

NPS

OD (mm)

SCH 5S

SCH 10S

SCH 40S

SCH 80S

1/2"

21.34

1.65 mm / 0.82 kg/m

2.11 mm / 1.03 kg/m

2.77 mm / 1.31 kg/m

3.73 mm / 1.67 kg/m

3/4"

26.67

1.65 mm / 1.05 kg/m

2.11 mm / 1.32 kg/m

2.87 mm / 1.73 kg/m

3.91 mm / 2.26 kg/m

1"

33.40

1.65 mm / 1.33 kg/m

2.77 mm / 2.15 kg/m

3.38 mm / 2.58 kg/m

4.55 mm / 3.33 kg/m

1 1/4"

42.16

1.65 mm / 1.70 kg/m

2.77 mm / 2.77 kg/m

3.56 mm / 3.49 kg/m

4.85 mm / 4.59 kg/m

1 1/2"

48.26

1.65 mm / 1.95 kg/m

2.77 mm / 3.20 kg/m

3.68 mm / 4.16 kg/m

5.08 mm / 5.57 kg/m

2"

60.33

1.65 mm / 2.46 kg/m

2.77 mm / 4.05 kg/m

3.91 mm / 5.60 kg/m

5.54 mm / 7.70 kg/m

2 1/2"

73.03

2.11 mm / 3.80 kg/m

3.05 mm / 5.42 kg/m

5.16 mm / 8.89 kg/m

7.01 mm / 11.75 kg/m

3"

88.90

2.11 mm / 4.65 kg/m

3.05 mm / 6.65 kg/m

5.49 mm / 11.62 kg/m

7.62 mm / 15.72 kg/m

4"

114.30

2.11 mm / 6.01 kg/m

3.05 mm / 8.61 kg/m

6.02 mm / 16.55 kg/m

8.56 mm / 22.98 kg/m

6"

168.28

2.77 mm / 11.64 kg/m

3.40 mm / 14.23 kg/m

7.11 mm / 29.09 kg/m

10.97 mm / 43.81 kg/m

8"

219.08

2.77 mm / 15.21 kg/m

3.76 mm / 20.55 kg/m

8.18 mm / 43.79 kg/m

12.70 mm / 66.53 kg/m

UNS N08020 Pipes and Tubes Size Chart

Tube OD

20 BWG (0.89 mm)

18 BWG (1.24 mm)

16 BWG (1.65 mm)

14 BWG (2.11 mm)

12 BWG (2.77 mm)

1/2" (12.70 mm)

0.27 kg/m

0.36 kg/m

0.46 kg/m

0.57 kg/m

0.70 kg/m

5/8" (15.88 mm)

0.34 kg/m

0.46 kg/m

0.60 kg/m

0.74 kg/m

0.92 kg/m

3/4" (19.05 mm)

0.41 kg/m

0.56 kg/m

0.73 kg/m

0.91 kg/m

1.14 kg/m

1" (25.40 mm)

0.55 kg/m

0.76 kg/m

0.99 kg/m

1.25 kg/m

1.59 kg/m

1 1/4" (31.75 mm)

0.70 kg/m

0.96 kg/m

1.26 kg/m

1.59 kg/m

2.04 kg/m

1 1/2" (38.10 mm)

0.84 kg/m

1.16 kg/m

1.53 kg/m

1.93 kg/m

2.48 kg/m

2" (50.80 mm)

1.13 kg/m

1.56 kg/m

2.06 kg/m

2.61 kg/m

3.38 kg/m

Applications and Industrial Uses of UNS N08020 Pipes and Tubes

Frequently Asked Questions

What are UNS N08020 Pipes and Tubes?

UNS N08020 Pipes and Tubes are nickel-iron-chromium alloy products designed for corrosive chemical and acid-service applications.

What is UNS N08020 also known as?

UNS N08020 is also known as Alloy 20, INCOLOY Alloy 20, or 20Cb-3.

What ASTM standards cover UNS N08020 Pipes and Tubes?

Applicable standards include ASTM B729, B464, B468, B751, and B829, depending on the pipe or tube type.

Is UNS N08020 resistant to sulfuric acid?

Yes, UNS N08020 provides strong resistance to sulfuric acid, as well as pitting and crevice corrosion.

What is the difference between UNS N08020 and 316L?

UNS N08020 generally provides better resistance to sulfuric acid and certain aggressive chemical environments than 316L stainless steel.

Can UNS N08020 Pipes and Tubes be welded?

Yes, UNS N08020 can be welded using suitable welding procedures and compatible filler metals.

Does UNS N08020 require post-weld heat treatment?

Generally, no separate post-weld heat treatment is required for typical fabrication; the alloy is normally supplied in the annealed condition.