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High-Temperature Resistant Steels

Recommended for Fasteners with Reduced Shank Used in Thermal Power Machines.

Mechanical requeriments at room temperature (guaranteed values)
DIN 17240
Grade 		Mat. Nº Yield Strength N/mm2 (min.) Tensile Strength N/mm2 (min.) Elong.% (min.) Reduct.% (min.) Impact test Max. temp for continuos operation ºC
DVM" J" ISO-V" J"
C 35 (T y R**) 1.0501

280

500-650

22

40

--

--

400
Ck 35 (T y R**)

1.1181

280

500-650

22

45

41

39

350
Cq 35

1.1172

280

 500-650 22

45

55

55

350
24 Cr Mo 5 (T y R**)

1.7258

420

600-750

18

60

89

102

400
21 Cr MoV 57***

1.7709

 550

700-850

 16

60

 69

63

540
40 Cr MoV 47***

1.7711

700

850-1000

 14

45

 41

47

540
X 22 CrMoV 47***

1.4923

600

 800-950 14

45

 41 47 540

X 19 CrMoVNbN 11

1.4913 780 900-1050 10

40

24

 20 580

X 8 CrNiMoBnb 1616

1.4986 500 650-850 16 40 48 17

650
Ni Cr 20 Ti Al 2.4952 600

> 1000

12

 12

17

20

700

* 21 Cr Mo V 57 y 40 Cr Mo V 47 could be replaced by 24 Cr Mo V 55, this material satisfies ASTM A-193 Gr.B16 requirements.

** Q & T (Quenched and Tempered)


MECHANICAL REQUIREMENTS AT DIFERENT TEMPERATURES ( GUARANTEED VALUES)
Grade Nº Mat. Yield Strength at the following temperatures (N/mm2):
20ºC 200ºC 250ºC 300ºC 350ºC 400ºC 450ºC 500ºC 550ºC 600ºC 650ºC
Ck 35

1.1181

280

 216 206

186

167

147

--

--

--

-- --
Cq 35 1.1172 280 216 206 186 167 147 -- -- -- -- --
24 CrMo5

1.7258

420

 382 372 344

324

 294

265

 226

--

 --

--
21 CrMoV 57* 1.7709 550 500 480 460 441 412 372 334 275 -- --
40 CrMoV 47*

1.7711

700

 635 617 598 570 540 500 460 403 -- --
X22 CrMoV 121 1.4923 600 530 505 480 452 423 382 344 284 206 --
X 19 CrMoVNbN 11 1.4913 780 700 680 655 620 580 530 470 400 315 --
X 8 CrNiMoBnb 1616 1.4986 500

432

412

 393

372

 353

334

 314

284

 255 206
Ni Cr 20 Ti Al 2.4952 600 568 564 560 550 540 530 520 510 500 480


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