EN 10137-2 Grade S620QL1 quenched and tempered (+QT)

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Description

S620QL1 is a fluid tempered high-strength fine grain weldable steel and a min. yield point of 620 N/mm². It is applicated for steel structures, e.g. bridge and load-carrying constructions, transport vehicles, lifting and earthmoving machines. The normal thickness span is 3 to 50 mm. Lowest application temperature -60 deg. C. The steel is cold forming processed, i.e. at temperatures below highest tolerable stress relieving temperature of 530 to 560 deg. C. After hot forming above 580 deg. C has to be conducted a repeated tempering in order to achieve delivery condition qualities. The steel is combustible and fusion cuttable subject to appropriate operating method. Surface condition influences flame cutting. Preheating up to 100 - 200 deg. C is advisable for workpiece temperatures below 5 deg. C and if flame cutting edges are cold formed on further processing. Instructions: The steel is suitability tested for steam boiler and pressure vessel construction according to instructions valid for Federal Republic of Germany (VdTÜV-Werkstoffblatt 257).

Related Standards

Equivalent Materials

This material data has been provided by WIAM.

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.

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Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.84 g/cm³

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Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

210 GPa

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Elongation

20.0 °C

15 %

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Elongation, transverse

20.0 °C

17 %

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Poisson's ratio

23.0 °C

0.3 [-]

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Typical for Steel

Tensile strength

20.0 °C

650 - 890 MPa

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Tensile strength, transverse

20.0 °C

700 - 890 MPa

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Yield strength

20.0 °C

560 - 620 MPa

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Yield strength Rp0.2

100.0 °C

590 MPa

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150.0 °C

570 MPa

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200.0 °C

540 MPa

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250.0 °C

520 MPa

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300.0 °C

500 MPa

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350.0 °C

485 MPa

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400.0 °C

470 MPa

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Yield strength, transverse

20.0 °C

620 MPa

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Thermal

PropertyTemperatureValue

Coefficient of thermal expansion

100.0 °C

1.2E-5 1/K

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Specific heat capacity

20.0 °C

430 J/(kg·K)

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Thermal conductivity

20.0 °C

38 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

2.8E-7 Ω·m

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Chemical properties

PropertyValue

Aluminium

0.015 %

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Boron

5E-3 %

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Carbon

0.2 %

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Chromium

1.5 %

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Copper

0.5 %

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Manganese

1.6 - 1.7 %

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Molybdenum

0.6 - 0.7 %

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Nickel

2 %

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Niobium

0.06 %

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Nitrogen

0.02 %

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Phosphorus

0.02 %

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Silicon

0.8 %

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Sulfur

0.01 %

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Titanium

0.05 %

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Vanadium

0.12 %

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Zirconium

0.12 - 0.15 %

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