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Cognor Spółka Akcyjna
Oddział HSJ w Stalowej Woli

37-450 Stalowa Wola,
ul. Kwiatkowskiego 1
tel. +48 510 223 527
tel. +48 15 813 51 84
fax: +48 15 844 23 06
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High - strength, quenched and tempered plates

Application

Machine design and elements transmitting very high loads – self - propelled hoisting crane and jib crane, road making plant and mining machine.

Steelmaking method

Fine grain steel, melted in arc furnace; vacuum degassed and cast continuously (CC device).

 

Determination of type, chemical properties, and requirements according to PN-EN 10025-6:2007

Grades

Percentage of elements by ladle analysis

C

Mn

Si

P

S

Cr

Ni

Mo

Cu

Al

Ti

V

Nb

S690Q/QL/QL1

S890Q/QL/QL1

max

0,20

max

1,70

0,20

0,80

max 0,020

max

0,010

max 1,50

max

2,0

max

0,70

max

0,50

max

0,05

max

0,05

max

0,12

max

0,06

N

Zr

B

CEV*

 *CEV = C+Mn/6+ (Cr+Mo+V)/5 + (Ni + Cu)/15

max

0,015

max

0,15

max

0,005

max

0,65


Grades

  Mechanical properties

 

Impact resistance KV [J]
l - longitudinal sample,
t - transverse sample

Rm [MPa]

Rp0,2
[MPa]

A5
[%]

         0 °C

        -20 °C

       -40 °C

      -60 °C

l

t

l

t

l

t

l

t

S690Q

770 - 940

≥ 690

≥ 14

40

30

30

27

-

-

-

-

S690QL

50

35

40

30

30

27

-

-

S690QL1

60

40

50

35

40

30

30

27

S890Q

≥ 1100

≥ 880

≥ 11

40

30

30

27

-

-

-

-

S890QL

50

35

40

30

30

27

-

-

S890QL1

60

40

50

35

40

30

30

27


Plate dimensions

Plate thickness [mm]* Width [mm] Length [mm] Tolerances
3 - 6 1000 - 1250 2000 - 2500 EN 10029
8 - 14 1000 - 1500 2000 - 6000
15 - 30 1000 - 2000 2000 - 6000

* Other ranges dimensional to agree


Surface quality

Surface quality is accordance with EN 10163-2 :2006 class A, subclass 1 (as rolled condition). Another surface quality to be agreed.

Internal quality

Internal quality of plates in accordance with EN 10160 :2001 class S1, plates of 6mm and bigger in thickness only.

Welding

All welding techniques can be applied. Only electrode with low contents of Hydrogen should be used. The plates of thickness higher than 10 mm should be heated to the temperature 80°C; plates of thickness higher than 20mm should be heated to 100°C. All plates with temperature lower than 5°C should be heated to an ambient temperature. Surface temperature between following layers weld should be not higher than 175 - 225°C. Linear welding energy [kJ/mm] is dependent on total thickness of plates welded.

Cutting

Thermal (plasma, gas, laser) or mechanical cutting. During the thermal cutting will occur heat-affected zone (HAZ) (this will be dependent on cutting method). The plates of 25mm in thickness and higher should be heated to the temperature 150°C. If plates temperature is lower than 5°C the plates should be heated to an ambient temperature.

Machining

For turning, drilling, milling and others the tools with sintered carbides should be used. Machinability is made difficult because of high tensile strength-hardness to 330 HB.

 

On request we agree on details / other technical conditions of plat produced.

 

HSJ S.A. has the approval of the TÜV Nord in the following grades and conditions of reception:

Plates

Grade

Norm

width

[mm]

thickness

[mm]

delivery condition

S235J2 + N (1.0117)

DIN EN 10025-2

800

- 1500

2 - 30

AD2000-W1 TRD 101

S235JR + N (1.0038)

DIN EN 10025-2

AD2000-W1 TRD 101

S275J2 + N (1.0145)

DIN EN 10025-2

AD2000-W1 TRD 101

S275JR + N (1.0044)

DIN EN 10025-2

AD2000-W1 TRD 101

S355J2 +N (1.577)

DIN EN 10025-2

AD2000-W1 TRD 101

S355K2 + N (1.0596)

DIN EN 10025-2

AD2000-W1 TRD 101

S690QL (1.8928)

DIN EN 10025-6

DIN EN 10025-6

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