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Hastelloy C-22, NS 3308 (00Cr22Ni60Mo13W3) physical and chemical features

Hastelloy C-22, NS 3308 (00Cr22Ni60Mo13W3) physical and chemical features

The 00Cr22Ni60Mo13W3 alloy is an improvement and development of the aforementioned several high Mo nickel chromium molybdenum alloys. Its chemical composition is characterized by extremely low C and Si contents, high Cr content, moderate Mo content and W content. Because of these characteristics, the corrosion resistance of hastelloy C-22 alloy is better in many media than the above-mentioned nickel-chromium-molybdenum (tungsten) alloys, especially in oxidizing media such as FeCl3, 0^12, moisture, oxidation. – More pronounced in reducing acids. At the same time, the alloy still has excellent resistance to pitting, crevice corrosion and stress corrosion. Due to the extremely low C and Si content of this alloy, it is very suitable for the manufacture of corrosion-resistant welding equipment, vessels and pipelines in the chemical industry without the risk of sensitization.
8.3.4. 1 Chemical composition and organizational structure
The chemical composition of hastelloy C-22 alloy is shown in Table 8-7. In the solid solution state, the structure of the alloy consists of austenite. During the intermediate temperature aging, a small amount of carbides and intermediate phases are precipitated. Since the precipitation amount is extremely small, the corrosion resistance and mechanical properties of the alloy are not harmful.
8.3.4.2 Mechanical properties
The instantaneous mechanical properties of roomtel and high temperature in different states of hastelloy C-22 (00Cr22Ni60Mo13W3) alloy are shown in Table 8-44 to Table 8-46. The alloy in the solid solution state did not cause plasticity drop of the alloy after aging at 500 ° C for 100 h, but increased. Cold working increases the strength of the alloy and decreases with plasticity. As the amount of cold working increases, the degree of influence increases.
Table 8-47 and Table 8-48 show the impact properties and hardness data for the alloy.

Table 8-44 Mechanical properties of hastelloy C-22 (00Cr22Ni60Mo13W3) alloy in solid solution statepr

       products

test temperature/℃

Rm/MPa

 

Rp0.2/MPa

A/%

sheet

0. 71 -3. 2mm

room temperature

802

403

57

93

755

371

58

204

701

303

57

316

674

288

62

427

658

283

67

538

625

274

61

649

583

249

65

760

524

238

63

plate

6. 4 – 19. 1 mm

room temperature

785

373

62

93

738

336

65

204

676

279

66

316

652

250

68

427

631

239

68

538

603

234

67

649

574

221

69

760

521

214

68

bar diameter

12. 7〜50. 8 mm

room temperature

765

358

70

93

723

313

73

204

663

259

74

316

631

233

79

427

614

212

79

538

581

199

80

649

548

195

80

760

498

200

77

Table 8-45 Cold working and cold working and aging state hastelloy C-22 (00Cr22Ni60Mo13W3)

statues

Rm/MPa

 

Rp0.2/MPa

A/%

0%

802

403

57

 

10%

897

639

39

 

20%

1039

875

23

 

30%

1173

1042

13

 

40%

1322

1196

9

 

50%

1423

1265

10

 

60%

1533

1391

7

 

0% +500$ xl00h aging

801

425

73

 
10% +500¾ xl00h aging

972

757

42

 

20% +500¾ xl00h aging

1135

974

28

 

40% +500¾ x I00h aging

1421

1331

15

 
60% +500¾ xl00h aging

1725

1679

6

 

Table 8_46 hastelloy C-22 (00Cr22Ni60Mo13W3)

Alloy sheet size Welding method test temperature/℃ Rm/MPa

 

Rp0.2/MPa

 

A/%

sheet 3. 2mm

GTAW

room temperature

745

419

30

538

543

274

23

plate 6. 4mm

GTAW

room temperature

800

386

60

538

610

245

51

GMAW(Short arc)

room temperature

767

396

43

538

586

265

46

plate 12. 7 mm

GTAW

room temperature

788

451

47

538

590

312

52

760

489

269

30

GMAW(Short arc)

room temperature

749

435

38

538

562

308

38

760

437

266

25

GMAW(Scattered arc)

room temperature

756

461

37

538

555

321

33

760

470

282

27

Table 8-47 Notched impact properties of 00Cr22Ni60Mol3W3 alloy

Test conditions

V-notch impact absorption work/J

room temperature

-196℃

plate

1121℃ Solution treatment state

353

>351

in 260℃:aging 100h

>351

538℃ aging

lh

>351

10h

>351

100h

>351

1000h

118

649℃ aging

lh

>351

l0h

>351

l00h

134

760℃ aging

lh

>351

l0h

114

l00h

38

871℃ aging

lh

160

l0h

52

l00h

4

982℃ aging

lh

155

l0h

60

l00h

16

12.7mm plate

Welding by GTA method

201

150

Welding by GMA method (short arc)

183

131

Welding by GMA method (scattering arc)

195

160

 

Welding by GTA method

189

19. 1mm plate

Welding by GMA method (short arc)

151

 

Welding by GMA method (scattering arc)

162

Table 8-48 hastelloy C-22 (00Cr22Ni60Mo13W3)

material aging temperature/℃

cold work/%

0

10

20

30

40

50

60

sheet without aging 90HRB 24HRC 33HRC 36HRC 40HRC 41I-IRC 43HRC

504

94HRB 24HRC 32HRC 37HRC 42I-IRC 45HRC 48IIRC

543

95HRB 26HRC 32HRC 41HRC 44HRC 45IIRC 48HRC

577

95HRB 28HRC 32HRC 39HRC 40HRC 44I-IRC 48HRC

610

93HRB 22HRC 27HRC 33HRC 37I-IRC 41HRC 45HRC

649

93HRB 21HRC 27HRC 33HRC 37HRC 41HRC 45HRC

682

95HRC 20HRC 25HRC 31IIRC 36HRC 41IIRC 44HRC

821

94HRB 21HRC 26HRC 32HRC 35HRC 36HRC 37HRC

966

93HRB 21HRC 21HRC 21HRC 23HRC 25HRC 25HRC

1082

83HRB 83HRB 84HRB 83HRB 83HRB 83HRB 80HRB
plate without aging

95

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Post time: Jun-04-2019