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Nickel-base superalloy UNS NO6022

Nickel-base superalloy UNS NO6022

Place of Origin : Zhejiang,China
Brand Name : X&FSTEEL
Model Number : UNS N06022
Certification : China Classification Society Certification, ISO9001 Quality System Certification
Packaging Details : Wrapped with woven bag package
Delivery Time : The delivery time is according to the order
Payment Terms : 30%T/T
MOQ : 2 tons
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UNS N06022, comparable to Hastelloy® C-22® Alloy

UNS N06022 comparable to Hastelloy® C-22® alloy, is a Ni-Cr-Mo alloy with excellent corrosion resistance in both oxidizing and reducing atmospheres. In this alloy, carbide precipitation in the heat affected zone (HAZ) is suppressed and corrosion resistance is improved by reducing the contents of C and Si. Based on these features, UNS N06022 is widely used in materials under severe environments such as chemical plants. We can supplies this product in pipe forms.


Designation / Standard

Nippon Yakin Grade

ASTM B575

DIN 17744 / 17750

JIS H4551

NAS NW22

UNS N06022

2.4602

NW6022


Chemical Composition

NW6022


C

Si

Mn

P

S

Ni

Cr

Mo

Fe

Co

W

V

Min

20.0

12.5

2.0

2.5

Max

0.015

0.08

0.5

0.025

0.020

Balance

22.5

14.5

6.0

2.5

3.5

0.35

UNS N06022


C

Si

Mn

P

S

Ni

Cr

Mo

Fe

Co

W

V

Min

20.0

12.5

2.0

2.5

Max

0.015

0.08

0.50

0.02

0.02

Balance

22.5

14.5

6.0

2.5

3.5

0.35


Physical Properties

Specific heat (J/kg・K)

440

Specific resistivity (μΩ・cm)

1114.0

Thermal conductivity (W/m・K)

10.6

Thermal diffusivity (m²/s)

2.8 x 10-6

Coefficient of thermal expansion (10-6/℃)

20–100℃

12.4

20–200℃

12.4

20–300℃

12.6

20–400℃

13.1

20–500℃

13.7

Young's modulus (MPa)

20.4 x 104

Modulus of rigidity (MPa)

78.8 x 104

Ferromagnetism

None

Melting point (℃)

1325-1372


Mechanical Properties

NW 6022

0.2% proof stress
(N/mm2)

Tensile strength
(N/mm2)

Elongation
(%)

Hardness
(HRB)

≥ 310

≥ 690

≥ 45

UNS N06022

0.2% proof stress
(N/mm2)

Tensile strength
(N/mm2)

Elongation
(%)

Hardness
(HRB)

≥ 310

≥ 690

≥ 45

≤ 100

Examples


0.2% proof stress
(N/mm2)

Tensile strength
(N/mm2)

Elongation
(%)

Hardness
(HRB)

Hot-rolled plate sheet,
12-mm thick

367

744

73

84

Cold-rolled sheet,
8-mm thick

365

752

69

84

Cold-rolled sheet,
3-mm thick

383

782

57

86


Corrosion Resistance

Pitting Corrosion Resistance

Alloy

Critical pitting corrosion temperature (CPT)

6%FeCl3 + 1%HCl solution
(ASTM G48 Method C)

Green death solution

NAS NW22

> 120

>120

NAS NW276

>120

>120

NAS 254N

80

80

NAS 329J3L

50

45

SUS316L

10

25

Crevice Corrosion Resistance

Alloy

Critical pitting corrosion temperature (CCT)

6%FeCl3 + 1%HCl solution
(ASTM G48 Method D)

Green death solution

NAS NW22

>100

110

NAS NW276

100

110

NAS 254N

40

45

NAS 329J3L

25

30

SUS316L

<0

<0

Test conditions:

1) ASTM G48 Method C: Test duration 72h

2) ASTM G48 Method D: Test duration 72h, crevice formation using a multi crevice

3) Immersion in green death solution: Test duration 24 h, test solution 7% H2SO4 + 3% HCl + 1% FeCl3 + 1% CuCl2; a multi crevice was used for the crevice corrosion test

Intergranular Corrosion Resistance

Test conditions:

ASTM G28 Method A
Test duration: 24h in a boiling solution of 50% H2SO4 - Fe2 (SO4)3 solution

Acid Resistance

Test solution

Temperature
(
)

Concentration
(%)

Corrosion rate (g/m²hr)

NAS NW22

NAS NW276

NAS 254N*

NAS 329J3L*

SUS316L

H2SO4

80

5

0.01

0.02

0.02

0.00

1.10

10

0.02

0.03

0.02

0.14

2.92

20

0.02

0.04

1.16

3.33

20.1

40

0.04

0.06

1.78

250.5

291.3

60

0.47

0.08

1.86

263.1

72.0

80

0.34

0.03

2.82

90.4

11.1

Boiling

5

0.14

0.10

1.43

0.61

5.45

10

0.25

0.16

2.49

3.30

18.0

20

0.72

0.33

6.18

76.2

108.7

40

3.24

1.44

21.0

271.7

297.8

HCl

80

0.1

0.00

0.00

0.00

0.00

0.01

1.0

0.00

0.02

0.00

0.01

2.45

2.0

0.01

0.03

3.15

19.0

6.66

3.0

0.03

0.33

12.8

51.5

13.6

Boiling

0.1

0.00

0.00

0.00

0.00

0.01

1.0

0.13

0.23

0.13

4.82

6.32

2.0

1.32

0.91

27.8

56.7

33.6

3.0

3.63

1.64

54.2

145.2

69.1

Test condition: Test duration 24h

Converted to mm/y from unit corrosion rate, g/m²h
mm/y = g/m²
h x 8.76/d (d: density)
[d] NAS NW22:8.70g/cm³, NAS NW276:8.90g/cm³, NAS 254N:8.06 g/cm³, NAS 329J3L:7.80 g/cm³, SUS316L:7.98 g/cm³

* NAS 254N: 23Cr-25Ni-5.5Mo-0.2N (austenitic super stainless steel)

* NAS 329J3L: 22.5Cr-5.3Ni-3.2Mo-0.16N (duplex stainless steel)

Stress Corrosion Cracking Resistance

Alloy

MgCl2 concentration [boiling points () shown in parentheses]

20% (108)

25% (110)

30% (115)

35% (126)

38% (134)

42% (142)

NAS NW22

NAS NW276

NAS 254N

NAS 329J3L

×

×

×

×

SUS316L

×

×

×

×

×

For these test conditions the alloy was immersed in a boiling solution of MgCl2 for 300 h. A U-bend test piece was used
: No stress corrosion cracks
×: Stress corrosion cracking occurred

Weldability

NAS NW22 can be welded much the same as stainless steel. We suggest that matching composition welding consumables be used. A post-weld heat treatment is not required.

Heat Treatment

The solution treatment temperature of NAS NW22 ranges from 1150 to1170. Rapid cooling of the alloy is necessary after heating.

Applications

NAS NW22 is used for pharmaceutical plants, semiconductor manufacturing equipment, various types of chemical plants and flue gas desulfurization system.


Product Tags:

UNS N06022

      

Nickel-base superalloy 6022

      

Nickel-based alloy UNS N06022

      
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