S890QL1 Quenched and Tempered Structural Steel

EN10025 S890QL1 Extra High Strength and Toughness Steel Plate

S890QL1, Steel Number 1.8925 is an extra high strength and toughness steel to EN10025-6. S890QL1 is a quenched and tempered, fine grained structural steel with minimum yield strength of 890MPa(130ksi) in its delivery condition, its mechanical properties are achieved by water quenching follow by tempering. S890QL1 suitable for low temperature extreme working environment as its minimum impact value down to -60ºC, this steel grade perform good durability.

S890QL1 Chemical Composition

C	Si	Mn	P	S	Cr	Ni	Mo
≤ 0.20	≤ 0.50	≤ 1.60	≤ 0.020	≤ 0.010	≤ 0.90	≤ 2.0	≤ 0.70
V+Nb	B
≤ 0.010	≤ 0.004

* This steel is fine grained through sufficient aluminium content

* Please note :The manufacturer reserves the right to change the chemical composition.

CEV - Carbon Equivalent Value

The limiting CEV values are partially below the values indicated by EN10025-6

Steel Plate Thickness t	Max.CEV
t ≤ 50mm (2 inches)	0.72
50mm (2 inches) ≤ t ≤ 100mm(4 inches)	0.77

Lower Carbon Equivalent Values may be agreed on request

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

*Please note : the values mentioned above are for information only, the manufacturer reserves the right to change the chemical composition and CEV.

S890QL1 Mechanical Properties

Plate thickness	Minimum Yield Strength	Minimum Tensile Strength	Minimum Elongation
mm [inches] 1)	ReH2) MPa [ksi] 1)	Rm MPa [ksi]1)	A5% Minimum	A2in.3)% Minimum
≤ 50mm [2inches]	890MPa [130ksi]	940~1100 [136~159ksi]	12	13
> 50mm [2inches] ≤ 80mm [3inches]	850 MPa [123ksi]	900~1100 [130~159ksi]	12	13
> 80mm [3inches] ≤ 100mm [4inches]	830 MPa [120ksi]	880~1100 [128~159ksi]	12	13

Higher minimum values may be agreed on request.

S890QL1 V Notch Impact Test

Position of Samples	Impact energy Av Joules [ft-lb]1) at test temperature
	0ºC [32ºF] 1)	-20ºC [-4ºF] 1)	-40ºC [-40ºF] 1)	-60ºC [-76ºF] 1)
Longitudinal	60 Joules [44]	50 Joules [37]	40 Joules [30]	30 Joules [22]
Transverse	40 Joules [30]	35 Joules [26]	30 Joules [22]	27Joules[20]

The specified minimum value is the average of 3 tests. Only one individual value is

permitted to be below this minimum value, and no more than 30%. For plate thicknesses below 12 mm, the test can be carried out on Charpy-V test specimens with reduced width; the minimum width must be 5 mm. The minimum impact value will be decreased proportionally.

¹⁾ The Values are for information only.

²⁾ if not apparent, the yield strength R_p0.2 is measured instead.

³⁾ These values apply if tested according to ASTM A370.

Testing

Tensile and impact tests will be performed according to EN10025-6 once per heat and 40 t. Tests on every heat treated plate may be possible on request.

The Specimens of the tensile test are prepares according to EN 10025-6. Testing is carried out on specimens of guage length L₀= 5.65⋅√S ₀ or L₀= 5⋅d₀, in accordance with EN ISO 6892-1.

Tensile tests according to ASTM A370 may be agreed.

The impact test will be carried out on Charpy-V-specimens in accordance with EN 10045-1. Unless otherwise agreed, the test will be performed at the lowest temperature

of the corresponding quality on transverse test specimens taken as follows:

• for plate thicknesses < 40 mm: the test specimen shall be taken in such a way that one

side is not further away than 2 mm from a rolled surface.

• for plate thicknesses ≥ 40 mm: ¼ of the plate thickness.

Unless otherwise agreed, the test results are documented in a certificate 3.1 in

accordance with EN 10204.

Processing

The entire processing and application techniques are of fundamental importance to the reliability of the products made from this steel. The user should ensure that his design, construction and processing methods are aligned with the material, correspond to the state-of-the-art that the fabricator has to comply with and are suitable for the intended use. The customer is responsible for the selection of the material. The recommendations of the EN 1011-2 (Welding) and CEN/TR 10347 (Forming) as well as recommendations

regarding job safety in accordance with national rules should be observed.

Cold forming

Cold forming means forming below the maximum allowable stress relief temperature (560

°C/ 1040 °F). S890QL1 can be cold formed with regard to its high yield strength. Flame cut or sheared edges in the bending area should be ground before cold forming. Cold forming is related to a hardening of the steel and to a decrease in toughness. Depending on the relevant design code this can result in the need of larger bending radiuses than indicated in the chart. For larger cold forming amounts we recommend you to consult the steel producer prior to ordering. During the processing, the necessary safety measures have to be taken, so that nobody will be exposed to a danger by a possible fracture of the work piece during the forming process.

The following geometries can usually be achieved by cold forming without the formation of

surface defects (where t is the plate thickness)

	Minimum bending radius	Minimum die with
Transverse direction	3 t	9 t
Longitudinal direction	4 t	12 t

Hot forming

If the temperature of 560 °C (1040 °F) is exceeded, the initial tempering will be altered so that the mechanical properties are affected. To regain the initial properties new quenching and tempering become necessary. However, water quenching of a formed work pece or component will often be less effective than the original quenching in the plate mill so that the fabricator may not be able to re-establish the properties required and therefore hot forming is not suitable.

Finally, it is the fabricator’s responsibility to obtain the required values of the steel through an appropriate heat treatment.

Welding and flame cutting

Due to its high yield strength, S890QL1 requires special care during plate processing.

Detailed instructions for flame cutting of the S890QL1 shall be provided.

For general welding instructions, please consult the EN 1011. In order to ensure that the tensile strength of the weld metal fulfils the requirements of the base metal, the heat input and interpass temperature must be limited during welding. Experience has shown that the welding conditions should be chosen so that the cooling time t _8/5 does not exceed 12 seconds. This is applicable when using suitable filler materials of a corresponding yield strength class.

The high yield strength of the base material must be taken into account when choosing the filler materials. It should be considered that increased heat input leads to lower tensile properties in the weld metal. If a stress relieving heat treatment is planned during or after plate processing, this must also be considered when selecting the filler materials.

To avoid hydrogen-induced cold cracking, only filler materials, which add very little hydrogen to the base metal, may be used. Therefore, shielded arc welding should be preferred. For manual arc welding,electrodes with basic coating (type HD<5 ml/100 g in accordance with ISO 3690), and dried according to the manufacturer’s instructions, should be used.

Heat treatment

If a stress relieving has to be considered because of constructional regulations, constructive reasons or because it is necessary for the fabrication, please consult us. The properties of structural components can be altered by a stress relief heat treatment.

Detailed instructions for flame cutting, welding, machining and about the structural properties of the S890QL1 are provided in the technical information upon request.

General technical delivery requirements

Unless otherwise agreed, the general technical delivery requirements in accordance with EN 10021 apply.

Tolerances

Unless otherwise agreed, the tolerances will be in accordance with EN 10029, with class A for thickness and table 4, steel group H, for the maximum flatness deviation. Smaller flatness deviations may be possible on request prior to order.

Surface quality

Unless otherwise agreed, the specifications will be in accordance with EN 10163-2, class A2.

General note

If particular requirements are demanded and not covered in this data sheet, please contact us with the specifications for our review and agreement prior to ordering. The information in this data sheet is a product description. This data sheet is updated at occasion demands.

Country of Origin

Japan, Korea, China, UK, Denmark, Germany, French, Austria, Finland and Sweden.

Contact us

Please send your valued inquiry to This email address is being protected from spambots. You need JavaScript enabled to view it. or contact us +604-2291331

Please note: the technical information above is for guidance only – for exact specifications please check with our sales team.