INCOLOY 20-SHANGHAI KANGSHENG AVIATION MATERIALS TECHNOLOGY CO., LTD.

INCOLOY 20

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Product Description

A nickel-iron-chromium alloy with additions of copper and molybdenum. It also contains niobium for stabilization against sensitization and resultant intergranular corrosion. The alloy has excellent resistance to general corrosion, pitting and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric and nitric acids. Used for tanks, piping, heat exchangers, pumps, valves and other process equipment.

STANDARD PRODUCT FORMS

Pipe, tube, sheet, strip, plate, round bar, flat bar, forging
stock, hexagon and wire.

MAJOR SPECIFICATIONS

UNS N08020
ASTM A 240, A 480, B 366,
B 462 – 464, B 468,
B 471 – B 475, B 729, B 751,
B 775, B 829, B 906
DIN 17744, 17750-17754
ASME SA-240, SA-480, SB-366,
SB-462 – SB-464,
SB-468, SB-471 – SB-475,
SB-729, SB-751, SB-775,
SB-829, SB-906
ISO 6207, 6208, 9723 – 9725

LIMITING CHEMICAL COMPOSITION, %

Ni ......32.0 – 38.0
Fe.......Remainder
Cr......19.0 – 21.0
Cu..........3.0 – 4.0
Nb+Ta.... 8xC-1.0
Mo..........2.0 – 3.0
Nb.......... 1.0 max.
C...........0.07 max.
Mn.......... 2.0 max.
P......... 0.045 max.
S........ 0.035 max.
Si............ 1.0 max.

PHYSICAL CONSTANTS AND THERMAL PROPERTIES

Density, Ib/in³.........................................................................0.292
g/cm³......................................................................... 8.08
Specific Heat, Btu/lb•°F....................................................... 0.12
J/kg•°C............................................................ 500
Coefficient of Expansion, 77 – 212°F, 10^-6 in/in •°F........8.2
25 – 100°C, μm/m •°C.......... 14.7
Thermal Conductivity, Btu • in/ft²•h•°F...............................85
W/m •°C........................................... 12.3
Electrical Resistivity, ohm •circ mil/ft................................ 651
μΩ•m................................................. 1.08

TYPICAL MECHANICAL PROPERTIES