ЛрО,2таУ be estima,ed by lowering Rp1 0 by 25 MPa.

Лр0,2 values instead of7?P1,0.

The austenitic-ferritic steels are not to be used for temperatures higher than 250 CC in pressure vessel applications. 1 MPa = 1 N/mm2Annex A

Welding conditions

Annex A is normative for austenitic and austenitic-ferritic grades.

Annex A is informative for ferritic and martensitic grades.



Table A.1 —Welding conditions


(D To D ro

■U c ro g

c
2

(/> □ <


Designator

Name

1

Number

Preheat temperature

°С a

Interpass temperature °С max.

Post heat treatment

°С

GP240GH

1.0619

20 to 150

350

No heat treatment necessary

GP280GH

1.0625

20 to 150

350

No heat treatment necessary

G17Mn5

1.1131

20 to 150

350

No heat treatment necessary

G20Mn5

1.6220

20 to 150

350

No heat treatment necessary

G18Mo5

1.5422

20 to 200

350

>650

G20Mo5

1.5419

20 to 200

350

>650

G17CrMo5-5

1.7357

150 to 250

350

>650

G17CrMo9-10

1.7379

150 to 250

350

>680

G12MoCrV5-2

1.7720

200 to 300

400

>680

G17CrMoV5-10

1.7706

200 to 300

400

>680

G9Ni10

1.5636

20 to 150

350

>570

G17NiCrMo13-6

1.6781

20 to 200

350

>580

G9Ni14

1.5638

20 to 200

300

>560

GX15CrMo5

1.7365

150 to 250

350

>650

GX8CrNi12

1.4107

100 to 200

350

Same as normal tempering temperature

GX3CrNi13-4

1.6982

20 to 200

b

b

GX4CrNi13-4

1.4317

100 to 200

300

Same as normal tempering temperature

GX23CrMoV12-1

1.4931

200 to 450

450

> 680 °С after cooling under 80 °С to 130°C

GX4CrNiMo16-5-1

1.4405

No preheat

200

Same as normal tempering temperature





Minor welds c

Major welds d

GX2CrNi 19-11

1.4309

No preheat

b

No heat tr. necess.

No heat tr. necess. e

GX5CrNi19-10

1.4308

+AT’9

GX5CrNiNb19-11

1.4552

No heat tr. necess., but h

GX2CrNiMo19-11-2

1.4409

No heat tr. necess.

No heat tr. necess. e

GX5CrNiMo19-11-2

1.4408

+Atf9

GX5CrNiMoNb19-11-2

1.4581

No heat tr. necess., but h

GX2NiCrMo28-20-2

1.4458

20 to 100

150

No heat tr. necess., but c

+АТ'

GX10NiCrSiNb32-20

1.4859

No preheat

200

For wall thickness > 80 mm, annealing at > 850 °С is necessary to reduce residual stresses

GX2CrNiMoN22-5-3

1.4470

20 to 100

250

+ AT'j

+ AT''

GX3CrNiMoCuN25-6-3-3

1.4517

20 to 100

250

+ AT'j

+ AT 'j

GX2CrNiMoN25-7-3

1.4417

20 to 100

250

+ AT'i

+ AT'j

GX2CrNiMoN26-7-4

1.4469

20 to 100

250

+ AT' j

+ AT'j

to ё О c


a The preheating temperature is related to the geometry and the thickness of the casting and climate conditions.

b At the discretion of the manufacturer unless otherwise agreed.

c For minor welds, where applicable, special arrangement shall be agreed upon according to corrosion conditions.

d In general production welds are considered major when the depth of the cavity prepared for welding exceeds 40 % of the wall thickness

e For use at low temperature + AT is required.

f The heat treatment for all the mentioned steels is + AT (solution annealing); it is usually made by liquid quenching or by air quenching if so agreed for very small and thin castings.

9 For use at high temperature + AT may be suppressed.

h For improving the corrosion resistance a special stabilising heat treatment (stress relieve and carbide precipitation) in the range of 600 °С to 650 °С for GX5CrNiNb19-11 and 550 °С to 600 °С for GX5CrNiMoNb19-11-2 may be agreed.

' + AT may only be suppressed if welding is performed with restricted heat input conditions.


J The heat treatment for ail the mentioned steels is + AT (solution annealing). Air Quenching may be agreed for very small and thin castings. After solution annealing at high temperatures, castings may be cooled down to between 1 050 °С and 1 010 °С prior to water quenching in order to improve corrosion resistance and prevent cracks in complex shapes.




































Annex В

(informative)

Physical properties

Information on physical properties of steel grades is given in Table B.1.



Table B.1 — Physical properties (informative)

Designation Name Number

Density kg/dm^ at

20 °С

Mean thermal expansion

io-6K"1

from

Thermal conductivity

W/(mK)

at

Specific heat J/(kgK) at

Magnetic properties

20 °С to

100 °С

20 °С to

300 °С

20 °С to

500 °С

50 °С

100 °С

20 °С

GP240GH

1.0619

7,8

12,6

13,4

14

45


460

Magnetic

GP280GH

1.0625

7,8

12,8

13,6

14,5

45


460

G17Mn5

1.1131

7,8

13,0

13,8

15

45


460

G20Mn5

1.6220

7,8

13,0

13,8

15

45


460

G18Mo5

1.5422

7,85

12,4

13,1

13,8

43

-

460

G20Mo5

1.5419

7,85

12,4

13,1

13,8

43

460

G17CrMo5-5

1.7357

7,85

11,8

12,9

13,7

38,5


460

G17CrMo9-10

1.7379

7,85

11,8

12,6

13,4


460

G12MoCrV5-2

1.7720

7,85






460

G17CrMoV5-10

1.7706

7,85

12,4

13,6

14,5


~~

460

G9Ni10

1.5636

7,85

11,8

12,4

13,6

36


460

G17NiCrMo13-6

1.6781

7,85





460

G9Ni14

1.5638

7,85






460

GX15CrMo5

1.7365

7,8

11,8

12,3

12,7

30,1


460

GX8CrNi12

1.4107

7,7

10,5

11,5

12,3

26

27

460

GX4CrNi13-4

1.4317

7,7

10,5

11

12

26

27

460

GX3CrNi13-4

1.6982

7,7

10,5

11

12

26

27

460

GX23CrMoV12-1

1.4931

7,7



-



460

GX4CrNiMo16-5-1

1.4405

7,8

10,8

11,5

12

17

18

460

GX2CrNi19-11

1.4309

7,88

16,8

17,9

18,6

15,2

16,5

530

Non to slight magnetic

GX5CrNi19-11

1.4308

7,88

16,8

17,9

18,6

15,2

16,5

530

GX5CrNiNb19-11

1.4552

7,88

16,8

17,9

18,6

15,2

16,5

530

GX2CrNiMo19-11-2

1.4409

7,9

15,8

17

17,7

14,5

15,8

530

GX5CrNiMo19-11-2

1.4408

7,9

15,8

17

17,7

14,5

15,8

530

GX5CrNiMoNb19-11-2

1.4581

7,9

15,8

17

17,7

14,5

15,8

530

GX2NiCrMo28-20-2

1.4458

8,0

14,5

16,2

17

16

17

500

GXIONiCrSiNb 32-20

1.4859

8,0


15

16,3

12,1

13,1

500

GX2CrNiMoN22-5-3

1.4470

7,7

13

14


18

18

450

Appreciably magnetic

GX3CrNiMoCuN25-6-3-3

1.4517

7,7

13

14


17

18

450

GX2CrNiMoN25-7-3

1.4417

7,7

13

14


17

18

450

GX2CrNiMoN26-7^

1.4469

7,7

13

14


17

18

450

Annex C
(informative)

Creep properties

Information on creep properties for some grades used at high temperature is given in Table C.1.

Table C.1 — Creep resistance (mean values)


°’r: rupture stress, MPa *, creep stress, MPa * at 1 % elongation


Designation

Temperature

CC

400 °С

450 °С

500 °С

550 ’С

600 °С

650 *С

700 вС

Name

Number

Time hour

о о о

о

о о о

о о

о о о

о о см

о о о

о

о о о

о о

о о о

о о см

о о о

о

о о о

о о

о о о

о о см

о о о

о

о о о

о о

о о о

о о см

о о о

о

о о о

о о

200 000

о о о

о

о о о

о о

о о о

о

о о о

о о

GP240GH

1.0619

°A1


205

147

160

110

145

132

88

83

50

71

74

43

40

20

32

-



*







GP280GH

1 0625

°r °A1


210

148

165

110


135

90

85

52


75

45

42

22











-

G20Mo5

1.5419

°r

°A1


360

310

290

275

185

205

150

180

130

160

125

85

65

70

50

66

41

30

15

23

10




*




G17CrMo5-5

1.7357

°r

°A1


420

271

370

222

356

321

196

244

145

222

187

130

117

81

96 *

98

65

55

35

44



-

-




G17CrMo9-10

1.7379

<7r «’Al


404

350

324

300

304

278

282

229

218

168

200

148

188

141

136

96

120

80

106

70

66

40

52

31

58

36

28

18

22

14





G12MoCrV5-2

1.7720

C7r





365

277


208

140


135

75


89







Gl7CrMoV5-10

1.7706

°r

°A1


463

427

419

385

395

356

340

305

275

243

254

218

229

196

171

133

157

110

151

120

96

70

83

49

80

50

28

18

19

10



-


GX15CrMo5 a

1.7365

<7r





228 а

165 а


168

106


93

58


51


-



*


GX23CrMoV12-1

1.4931

(7r

°A1


504

426

394

383

305

309

259

279

239

269

216

207

172

187

153

167

131

118

91

103

77

83

66

49

34

39

25


*



GX5CrNi19-10

1.4308






*






147

124


110

83


73

52

47


GX5CrNiNb19-11

1.4552

ar










246

192

-

156

124


109

80

73


GX5CrNiMo19-11-2

1.4408

ar











194

160

-

148

113


103

66

60

42

GX10NiCrSiNb32-20

1.4859

°r

°A1



*




-

*




-

122





85,7 64

71,3

a °rat470 "C.

1 MPa = 1 N/mm