Workgroup Contents

Lecture 2.4 : Steel Grades and Qualities

1. INTRODUCTION

2. DEFINITION OF STEEL

3. CLASSIFICATION OF STEEL GRADES

3.1 Classification by Chemical Composition

3.2 Classification by Main Quality Classes

4. QUALITY STANDARDS FOR STRUCTURAL STEELS

4.1 General Considerations

4.2 The Main Points

4.2.1 Steel Manufacturing Process

4.2.2 Delivery Conditions

4.2.3 Chemical Composition

4.2.4 Mechanical Properties

4.2.4.1 Tensile properties

4.2.4.2 Notch toughness properties (impact test)

4.2.4.3 Sampling direction

4.2.5 Technological Properties

4.2.5.1 Weldability

4.2.5.2 Formability

4.2.6 Surface finish

4.2.7 Inspection and testing

5. STRUCTURAL STEEL GRADES

5.1 Hot-Rolled Products in Non-Alloy Steels for General Structural Applications to EN 10025 [4]

5.1.1 General Description

5.1.2 Designation of the Steels

5.1.3 Steel Grades

5.2 Hot-Rolled Products in Weldable Fine Grain Structural Steels to EN 10 113 [5]

5.2.1 General Description

5.2.2 Delivery Conditions

5.2.3 Classification of Qualities

5.2.4 Designation

5.2.5 Steel Grades and Qualities

5.3 Structural Steels for Offshore Applications

5.4 Anti-lamellar Steel Grades

5.4.1 General Description

5.4.2 Anti-lamellar Qualities

5.5 Weathering Steel to EN 10 155 [6]

5.5.1 General Description

5.5.2 Corrosion Resistance

5.5.3 Steel Grades

5.6 Steel Grades for Hot Dip Galvanizing

6. CONCLUDING SUMMARY