Nickel alloys

N08020 • 2.4660 • TPS-Techalloy 20

Datasheet

ALLOY 20 is a nickel-iron-chromium alloy with addition of copper and Molybdenum. Stabilized with niobium against sensitization and resultant intergranular corrosion. ALLOY 20 has exellent resistance to general corrosion, pitting and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric and nitric acids.

Chemical composition • mass in %

Material grade Norm C
max.
Si
max.
Mn
max.
P
max.
S
max.
Cr Ni Mo Ti others
2.4660 DIN 17744 / 17751 0,070 1,00 2,00 0,025 0,015 19,00 - 21,00 32,00 - 38,00 2,00 - 3,00 Co. 1,50 Cu 3-4; Nb+Ta 8xC max.; Fe Rest
N08020 ASME SB / ASTM B 729 0,070 1,00 2,00 0,045 0,035 19,00 - 21,00 32,00 - 38,00 2,00 - 3,00 Cu 3-4; Nb+Ta 8xC max.; Fe Rest

Mechanical properties and heat treatment

Material grade Norm Rp 0,2 MPa
min.
Rp 1,0 MPa
min.
Rm MPa
min. max.
A
min.%
Hardness
HRB max.
Heat treatment
2.4660 DIN 17744 / 17751 240 550 40 95 soft annealed
N08020 ASME SB / ASTM B 729 240 550 30 annealed

Rp 0,2 = Rotation

Rp 1,0 = Yield Strength

Rm = Tensile Strength

A = Elongation

Tolerances

OD - Tube OD WT special WT ID
ab Ø4,55 mm ±0,050 mm ±0,150 mm ±0,100 mm X
ab Ø9,53 mm ±0,050 mm ±0,100 mm ±0,080 mm ±0,050 mm
ab Ø30,00 mm ±0,100 mm ±0,150 mm ±0,050 mm

Scope of dimensions*

* Dimensions not shown on request

WD [mm] 0,89 1,00 1,20 1,24 1,65 1,82 2,00 2,11 2,30 2,35 2,50 2,60 2,64 2,77 2,87 3,00 3,20 3,25 3,60 3,85 3,91 4,00 4,40 5,50 6,35 7,00
AD [inch] 0,035 0,048 0,065 0,072 0,083 0,093 0,104 0,109 0,113 0,126 0,128 0,154 0,250
[mm] [inch]
6,00
6,35 0,250
7,00
7,50
8,00
9,00
9,53 0,375
10,00
11,00
12,70 0,500
13,00
15,00
15,88 0,625
16,00
16,80
17,15 0,675
18,00
19,00
19,05 0,750
20,00
21,34 0,840
22,00
22,23 0,875
23,00
25,00
25,40 1,000
26,00
26,67 1,050
28,00
30,00
31,75 1,250
32,00
33,40 1,315
36,00
38,10 1,500
42,00
44,50 1,750

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