PSI - Issue 60

B Shashank Dutt et al. / Procedia Structural Integrity 60 (2024) 471–483 Author name / StructuralIntegrity Procedia 00 (2019) 000 – 000

480 10

Table 5: Estimated K 1c results of SS 316 LN welds tested at 550 °C

Aging temperature (°C) and durations (h)

Estimated Modulus of toughness MJ.m -3

Estimated K 1c ( MPa. m 0.5 )

Determined K j1c ( MPa. m 0.5 )

Percentage difference (%)

As welded

105

196

191

3

Aged at 370 1000 h Aged at 370, 10,000 h Aged at 370, 20,000 h Aged at 475, 1000 h Aged at 475, 10,000 h

112

203

164

24

123

212

199

7

73

163

178

8

57

145

211

32

55

142

190

25

Aged at 475, 20,000 h

46

130

174

25

Aged at 550, 1000 h

55

142

190

25

Aged at 550, 10,000 h

44

127

191

34

Aged at 550, 20,000 h

47

132

187

30

Table 6 : Estimated K 1c results of austenitic stainless steel welds tested at 25 °C (Hong et al. 2018)

Weld and aging condition (°C)

Yield strength (MPa)

Ultimate tensile strength (MPa)

Total elongation (%)

Estimated K 1c ( MPa. m 0.5 )

Determined K j1c ( MPa. m 0.5 )

Percentage difference (%)

Estimated Modulus of toughness (MJ.m -3 )

E 308 as weld

390

570

46

311

232

34

220

Aged at 400, 5k h Aged at 400, 10k h E 316 L as weld Aged at 400, 5k h Aged at 400, 10k h E 347 as weld Aged at 400, 5k h Aged at 400, 10k h

450

630

38

300

213

40

205

440

660

40

310

192

62

220

420

580

40

296

315

6

200

510

660

36

304

235

29

210

500

670

37

308

223

38

216

480

660

42

324

316

3

239

520

750

30

289

284

2

190

510

740

26

267

304

12

162