Structural Bolt - Iso 898-1 Certified, Minimum Tensile Strength Range 300-1200 N/mm², Vickers Hardness Up To 385 Hv, Impact Strength Minimum 30 J | High Performance Fastening Solution

Mechanical And Physical Property ISO 898 -
1:









Property
Class





Minimum tensile strength, Rm, nom



N/mm2

3.6

300

4.6

400
4.8

400
5.6

500
5.8

500
6.8

600
8.8'
d<16'
800
8.8'
d>16'
800

9.8'

900

10.9

1000

12.9

1200



Minimum
tensile strength, Rm, nom
N/mm2
330

400

420

500

520

600

800

830

900

1040

1220



Vickers
hardness, HV
F>98 N

min.

9.5

120

130

155

160

190

250

255

290

320

385



max.

220o

250

320

335

360

380

435



Brinell
hardness, HB

F=30D2

min.

90

114

124

147

152

181

238

242

276

304

366



max.

209o

238

304

318

342

361

414





Rockwell hardness, HR

min.
HRB

52

67

71

79

82

89

-

-

-

-

-



min.
HRC

-

-

-

-

-

-

22

23

28

32

39



min.
HRB

95.02

99.5

-

-

-

-

-



min.
HRC

-

-

32

34

37

39

44



Surface
hardness, HV 0.3

max.

--

9



Lower
yield stress
ReLh, N/mm2

nom.

180

240

320

300

400

480

-

-

-

-

-



min.

190

240

340

300

420

480

-

-

-

-

-



Stress
at 0.2% non-proportional
elongation RPO2r2 N/mm
nom.

-

-

640

640

720

900

1080



min.

-

-

640

660

720

940

1100




Stress under proof loud, Sp

Sp/ReL
or Sp/Rpo,2

0.94

0.94

0.91

0.93

0.90

0.92

0.91

0.91

0.90

0.88

0.88



N/mm2
180

725

310

280

380

440

580

600

650

830

970



Breaking
torque, MB

Nm
min.

-

See
ISO 898 - 7



Percent
elongation after tracture, A

min.

25

22

-

20

-

-

12

12

10

9

8



Reduction
area after fracture, Z

%
min.

-

52

48

48

44



Strength
under wedge loading'

The
values for full
size bolts and screws (no studs) shall not be smaller than the minimum
values for tensile strength shown in 5.2



Impact
Strength, KU

J
min.

-

25

-

-

30

30

25

20

15



Head
soundness

No
fracture



Minimum
height of non de carburized
thread zone, E

-

1/2xH1

2/3xH1

3/4xH1



Maximum
depth of complete
de carburization, G

mm

-

0.015



Hardness
after re tempering

-

Reduction
of hardness
20 HV maximum



Surface
Integrity

In
accordance with
ISO 6157-1 or ISO 6157 as appropriate