Steels_ Metallurgy and Applications, Third Edition

Table 4.14 The compositions and mechanical properties of fem‘tic steels for use at low temperatures

me Condition DesigMtion Composition Mechanical pmpertics a 2WC

C Mn Si Mo Nb Ni Cr ?ieU Tmile Elongation Cham

(96) (%) (%) (W (46) (%) (5%) smngrh strength (gauge V-notch

@@a) (MPa) length inpacttest

5.65 JSo) tempemd

(%) (‘C)

C-Mn
semi-killed
C-MU-Nb
Semi-killed

C-Mn-Nb
silicon killed
C-Mn
silicon killed,
finem
Ni-Cr-Mo

23% Ni

31% Ni

9% Ni

As mlled

Normalired

Normalized

Normalized

Quenched

and

tempend

Normalized

Normalized

and

tempexed

Double

normalired

and tempad

As welded

with

Ni-Cr-Fe

(Inconel 92)

elechDde5

BS grade4OC

BS grade4OD

4360: grade 43D

BS gnde50D

4360:

BS gradc4OE

4360. gnde 43E
      grade 55E
      BSC QT 445
      ASTM A517
      Gd F (USS T1)
      ASTM A203
      GdA
      BS 1501/503
      ASTM A203
      Gd D
      BS 1501/509

4360: grade 43c

grade 5oc

ASTM code

Case 1308 and

A353

0.22 1.6

0.22 1.6

0.19 1.6

0.19 1.6

0.24 1.6 0-0.55

0.1

0.1

0.1

0.22 1.6 0.1-0.55 0.1

260 400-480

280 430-510

260 400-480

280 430-510

355 490-620

355 490-620

0.19 1.6 0.1-0.55 260 400-480

0.19 1.6 0.1-0.55 280 430-510

0.26 1.7 0-0.65 0.1 450 550-700

0.1-0.2 0.6-1 0.15-0.35 0.4-0.6 0.7-1 0.4-0.65 690 795-930

0.17-0.23 0.7-0.8 0.15-0.3 2.1-25 255 450

0.17 -0.2 0.7 -0.8 0.15 -0.3 3.25-3.75 255 450

515 690

0.13 0.9 0.13-0.32 8.4-9.6 480 655

25

22

25

22

20

20

25

22

19

18

25

22

22

0

0

-20

-20

-15

-30

-50

-50

-50

-45

-60

-100

• 1%

-1%

“The impact test temperature is that laid down by the relevant standards for quality control purposes. This does not guarantee that the steel, especially if used in thick
sections, will be completely satisfactory for use at low temperams.
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