Quend 900

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Description

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.

Related Standards

Equivalent Materials

This material data has been provided by NLMK Group.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyValue

Carbon equivalent (CET)

0.36 [-]

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Carbon equivalent (CEV)

0.57 [-]

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Carbon equivalent note

CEV = C+Mn/6+ (Ni+Cu)/15+ (Cr+Mo+V)/5 and CET = C+(Mn+Mo)/10+Ni/40 +(Cr+Cu)/20

Dimension

PropertyValue

Width

1500 - 3100 mm

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Mechanical

PropertyTemperatureValueComment

Charpy impact energy, V-notch

-40 °C

27 J

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Transverse testing | thickness < 12 mm | Option 30 according to EN 10025

-20 °C

30 J

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Transverse testing | thickness < 12 mm | Option 30 according to EN 10025

0 °C

35 J

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Transverse testing | thickness < 12 mm | Option 30 according to EN 10025

Elongation

12 %

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min. | A5 | Transverse

Tensile strength

940 - 1100 MPa

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Transverse

Yield strength

900 MPa

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min. | Transverse

Chemical properties

PropertyValueComment

Aluminium

0.06 %

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max.

Boron

0.005 %

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max.

Carbon

0.2 %

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max.

Chromium

0.7 %

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max.

Manganese

1.5 %

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max.

Molybdenum

0.7 %

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max.

Nickel

1.5 %

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max.

Niobium

0.04 %

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max.

Nitrogen

0.005 %

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max.

Phosphorus

0.02 %

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max.

Silicon

0.5 %

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max.

Sulfur

0.01 %

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max.

Titanium

0.01 %

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max.

Vanadium

0.06 %

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max.

Technological properties

Property
Application areas

Quend 900 is recommended for the following applications:

  • crane booms
  • lifting equipment
  • stabilising support
  • undercarriage

  • Chemical composition

    The steel is fine grain treated.

    Cold Forming

    Quend 900 is very well suited for cold forming operations. Quend 900 complies with the S890QL bending requirements but offer even closer R/t ratios:


    Thickness
    (mm)
    Transverse to rolling
    (R/t)
    Longitudinal
    to rolling
    (R/t)
    Trans.
    Width
    (W/t)
    Long.
    Width
    (W/t)
    t < 8.02.53.0910
    8 ≤ t < 203.04.0910
    t ≥ 20.04.05.01012

    *R = Recommended punch radius (mm), t = Plate thickness (mm) , W – Die opening width (mm) (bending angle ≤ 90°)


    Due to the homogeneous properties and narrow thickness tolerances of Quend 900, variations in springback are kept at a low level. Grinding of flame cut or a sheared edge in the bending area is recommended to further prevent cracking during bending.

    Delivery condtion

    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.

    Machining

    Quend 900 provides a very good machinability and can be drilled, counter sinked and milled in the same way as any other 900MPa or S890QL Q&T steel.

    Other

    Quend 900 is delivered with a unique combination of excellent flatness, tight thickness tolerances and superior surface finish.


    FeatureNorm
    FLATNESSEN 10029: Class N (standard) & Class S
    THICKNESS tolerance-meets and exceeds EN 10029 Class A
    -tighter tolerances upon request
    Shape, length, width tolerancesmeets EN 10029
    SURFACE propertiesexceeds the usual market standards,EN 10163-2 Class B3

    Testings

    Ultra sonic testing (UT), is applied to secure the plate from discontinuities like inclusions, cracks and porosity. In thickness from 8 mm and up, all plates are UT tested and controlled against class S2, E2, according to EN 10160.

    Thermal cutting and welding

    Quend 900 may be cut either by oxygen fuel, plasma and laser cutting without any restrictions. Subsequent to cutting, let the cut parts slowly cool down to room temperature. Do never accelerate the cooling of the parts. A slow cooling rate will reduce the risk of cut edge cracking.

    Welding

    Welding of Quend 900 can be performed using any of the conventional welding methods available both as manual or automatic.

    In the thickness range up to 10 mm, preheating prior to welding is normally not needed, if a heat input of 1,7 kJ/mm is used.

    Welding of Quend 900 is recommended to be performed at ambient temperature not lower than +5 °C. Subsequent to welding, let the welded parts slowly cool down to room temperature. Do never accelerate the cooling process of the weld.

    It is always recommended to use low hydrogen electrodes when welding Quend 900.