Steel grade
(strength grade)

Ultimate strength

Yield point

Elongation

Bend
180°

Impact strength, J/cm²

KCU

KCV

N/mm²

%

+20/-20

-40/-70

After strain ageing

0/+20

-20

not less

not less

St3sp
St3ps

370-480

235

25

d=2.5a

69/29

-

29

-

-

St5sp
St5ps

490-630

275

19

d=4.5a

-

-

-

-

-

(265) 09Mn2Si

430

265

21

d=2a

59/-

29/24

29

-

-

(295) 09Mn2Si
09Mn2

430

295

21

d=2a

59/-

29/24

29

-

-

(325) 09Mn2Si

450

325

21

d=2a

59/-

29/24

29

-

-

(345) 17Mn1Si
17MnSi

450

345

21

d=2a

-/-

29/29

29

40/-

40

25MnSiBC
25CrMn2SiB
25CrMn2SiVB

569
638
785

363
441
589

18
14
10

-
-
-

-
-
-

-
-
-

-
-
-

-
-
-

-
-
-