EN S550QLO Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: European Union / EN

Data updates

Latest Update: 2022-04

Total number of updates: 2

Update History

2019-07

This material has 90 properties — only a subset is shown here.

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EN S550QLO Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.015 – 0.10

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

≤ 0.03

UNIT

CAS NUMBER

7440-38-2

CRITERIA

VALUE

≤ 0.0025

UNIT

CAS NUMBER

7440-42-8

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-69-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-70-2

CRITERIA

CEV

VALUE

val1

UNIT

CAS NUMBER

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7727-37-9; 17778-88-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-03-1

CRITERIA

Nb+Ti+V

VALUE

val1

UNIT

CAS NUMBER

CRITERIA

Nb+V

VALUE

val1

UNIT

CAS NUMBER

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-92-1

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-36-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-31-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-32-6

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

EN 10225-1: 2019 / Weldable structural steels for fixed offshore structures - Technical delivery conditions - Part 1: Plates

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EN S550QLO Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Density

7.67 — 7.86 kg/dm³

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Poisson Coefficient

0.27 — 0.3

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This material has 90 properties — only a subset is shown here.

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EN S550QLO Heat Treatments

Post weld heat treatment shall be within the temperature range 550°C to 620°C, with a maximum temperature of 25°C below the tempering range on the test certificate, for either 1 h per 25 mm thickness of plate or 4 h, whichever is the greater. Heating and cooling rates shall be in accordance with the following:
The rate of heating shall not exceed (5 500/t)°C/h or 55°C/h, whichever is the greater, where t is the plate thickness in mm.
Test welds shall be cooled to a temperature of 400°C at a rate not exceeding (6 875/t)°C/h or 55°C/h, whichever is the greater.
Below 400°C, plates may be cooled in still air.

EN S550QLO Mechanical Properties

Temperature

≤ 0°C 0 - 30°C

PROPERTY / VALUE

Yield Strength, Rp0.2

475 MPa

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Tensile Strength

540 — 750 MPa

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Elongation, A

15 %

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39 Cross References

24 Composition
22 Mechanical Properties
4 Physical Properties
1 Heat Treatment
- Metallography
- Machinability

- Stress-Strain
- Formability
- Fatigue
- Fracture
- Creep

- Joints
- Coatings
- Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

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