Extra High Strength Structural Steel Quend 900
Steel description and applications
Quend 900 is extra high strength structural steel produced as quenched and tempered with a minimum yield strength of 900 MPa. Quend 900 complies with the requirements corresponding to the S890QL given in the EN 10025-6 standard, where a minimum impact thoughness of 27 J is guaranteed at -40°C. Quend 900 is recommended for the following applications:
- crane booms
- lifting equipment
- stabilising support
- undercarriage …
Technical characteristi
Technical characteristics
Tensile properties
TRANSVERSE TESTING
|
Yield strength Rp 0.2 |
Tensile Strength Rm |
Elongation A5 |
|---|---|---|
|
900 MPa min |
940 – 1100 MPa |
12% min |
Impact toughness
Minimum values at
|
0 °C |
-20 °C |
-40 °C |
|---|---|---|
|
35 J |
30 J |
27 J |
Transverse testing according to EN 10025 option 30. Thickness < 12 mm subsized charpy V specimen have been used.
Chemical composition
The steel is fine grain treated
Max ladle analysis , %
|
C |
Si |
Mn |
P |
S |
Nb |
Cr |
V |
Ti |
Ni |
Al |
Mo |
N |
B |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
0,20 |
0,50 |
1,50 |
0,02 |
0,01 |
0,04 |
0,70 |
0,06 |
0,01 |
1,50 |
0,06 |
0,70 |
0,005 |
0,005 |
Carbon equivalent, typical values, %
|
CEV(1) |
CET(2) |
|---|---|
|
0,57 |
0,36 |
(1) CEV = C+Mn/6+ (Ni+Cu)/15+ (Cr+Mo+V)/5 (2) CET = C+(Mn+Mo)/10+Ni/40 +(Cr+Cu)/20
Dimensions
Quend 900 is currently supplied in the following range:
- thickness: 4 – 35 mm
- width: 1500 – 3100 mm
NLMK Clabecq carries on the extension of its dimensional program
in order to propose as soon as possible a thickness range from
4 to 40 mm. For more information, please check our website or
contact your local representative
Flatness, tolerances & surface properties
Quend 900 is delivered with a unique combination of
excellent flatness, tight thickness tolerances and superior
surface finish.
|
FEATURE |
NORM |
|---|---|
|
FLATNESS |
– EN 10029: . Class N (standard) & . Class S |
|
THICKNESS tolerance |
– meets and exceeds EN 10029 Class A – tighter tolerances upon request |
|
Shape, length, width tolerances |
meets EN 10029 |
|
SURFACE properties |
exceeds the usual market standards, EN 10163-2 Class B3 |
Delivery conditions
Quend 900 is delivered as quenched and tempered. Our Quend plates are supplied as standard in the shotblasted and painted condition. In order to maintain a good weldability and laser cutting performance, a low zinc silicate primer is applied. Plates can also be delivered unpainted.
Heat treatment
The mechanical properties of Quend 900 has been obtained by quenching and tempering. For not losing the guaranteed properties of Quend 900, the plate should not be used in applications requiring hot working and service temperatures above 550 °C.