steel plates

High strength quenched and tempered steel plate can be easily welded and fabricated.

We often find that steel plate to EN 10025 S690QL is called different things by different engineers. Plate to this specification and grade is variously described as:

  • High Strength Quenched and Tempered Steel Plate
  • High Yield Quenched and Tempered Steel Plate
  • High Strength Structural Steel Plate,
  • High Yield Structural Steel Plate
  • High Strength Low Alloy Steel Plate
  • HSLA

Scroll for more information

Composition

Chemical Composition – EN10025 S690QL

Content % (ladle analysis), maximum

CSiMnPSBCrCuMo
0.20 0.80 1.70 0.020 0.010 0.005 1.50 0.50 0.70
N Nb* Ni Ti* V* Zr*      
0.015 0.06 2.0 0.05 0.12 0.15      

Properties

Mechanical Properties – EN10025 S690QL

Plate Thickness mMYield StrengthReH (MPa)Tensile Strength Rm (MPa)Elongation A5 % minimumImpact Strength J, Minimum
3 to50 690 770 - 940 14 30 @ -40º C
50to 100 650 760 - 930 14 30 @ -40º C
100 to 150 630 710 - 900 14 30 @ -40º C

steel plates

RQT® 701 is one of the grades in the RQT® range of high strength quenched and tempered structural steel.

  • Manufactured by Tata Steel which is one of Europe's largest steel makers
  • Combines high yield and tensile strengths with good notch toughness and excellent weldability
  • The steel is very similar in its properties to the European steel specification EN 10025 S690QL

Scroll for more information

Composition

Chemical Composition – RQT® 701

Content % (ladle analysis), maximum - plates from 8 mm to 130 mm thick.

CSiMnSPCr
0.20 0.50 1.60 0.010 0.025 1.00
Mo Nb V Ni Cu B
0.70 0.060 0.08 1.50 0.40 0.004

Carbon equivalent values

 Maximum Ladle CEV (%)
8 mm to 30 mm thick 0.43
over 30 mm to 40 mm thick 0.55
over 40 mm to 100 mm thick 0.59
over 100 mm to 130 mm thick 0.61

Properties

Mechanical Properties - RQT® 701.

  over 70 to 130 mm thick
Minimum Yield Strength (Mpa) 690 630
Tensile Strength (Mpa) 790 - 930 690 - 930
Minimum Elongation 50 mm Guage (%) 18 18
Minimum Average Impact Energy 30 J @ -40°C 30 J @ -40°C
Minimum Individual Impact Energy 21 J @ -40°C 21 J @ -40°C

steel plates

This type of steel, which is well over three times the strength of a basic S275 structural steel, is still relatively easy to weld and fabricate.

  • EN 10025 includes a range of high strength quenched and tempered steel grades.
  • Minimum yield strength of 890 MPa.

Scroll for more information

Composition

Chemical Composition – EN10025 S890QL.

Content % (ladle analysis), maximum.

CSiMnPSBCrCuMo
0.20 0.80 1.70 0.020 0.010 0.005 1.50 0.50 0.70
N Nb* Ni Ti* V* Zr*      
0.015 0.06 2.0 0.05 0.12 0.15      

Properties

Mechanical Properties – EN10025 S890QL.

Plate Thickness mmYield Strength ReH (MPa)Tensile Strength Rm (MPa)Elongation A5 % minimumImpact Strength J, Minimum
3 to50 890 940 - 1100 11 30 @ -40º C
50to 100 830 880 - 1100 11 30 @ -40º C