SuperElso® 690CR

Quenched and Tempered High Strength Steel for Leg Components of Jack-up Rigs

SuperElso® 690 CR (SE 690 CR) is a 690 MPa (100 ksi) yield strength quenched and tempered steel adapted for jack-up rig legs of offshore platforms. SuperElso® 690 CR is manufactured via the electric furnace with dephosphorisation, ladle refining and vacuum degassing to provide a reproducible, clean and homogenous steel. This material has been specially designed for offshore applications requiring the use of heavy thick plates (up to 250 mm/10”) with demanding mechanical properties requirements. The chemical composition of SuperElso® 690 CR has been carefully adapted and allows the achievement of high impact values (> 50 J at – 60°C) across the thickness while respecting the tensile properties required.

The main application of SuperElso® 690 CR being the manufacturing of racks and chords, particular attention has been paid on forming, oxycutting and welding properties. The very low carbon content of this material allows cutting and welding under classical conditions, increasing in this way the cost efficiency of manufacturing.

Standards

  • DNV-GL : VL F690
  • ASTM : A 514 – A 517
  • ABS : FQ 70

Chemical analysis

Typical values (weight %)

C Mn Si P S Ni Mo Cr Al
SuperElso® 690 CR ≤ 0.15 ≤ 1.2 0.15/0.45 ≤ 0.01 ≤ 0.002 ≤ 4 ≤ 0.7 ≤ 0.7 ≤ 0.05
DNV ≤ 0.18 ≤ 1.70 0.1/0.5 ≤ 0.025 ≤ 0.02 0.04/0.1
ABS ≤ 0.16 0.9/1.6 0.1/0.5 ≤ 0.025 ≤ 0.025 0.04/0.1

Mechanical properties

Typical and guaranteed mechanical properties (thickness ≤ 210 mm)

YS (1/2 thickness) UTS (1/4 thickness) A% KVT (1/4 thickness) KVL (1/4 thickness) KVT (1/2 thickness)
(MPa) -60°C (J) -37°C (J)
Guaranteed ≥ 690 790 / 940 ≥ 16 46 / 32 ave./mini. 46 / 32 46 / 32
Typical 770 840 20 65 / 120 80 / 130 50 / 110
DNV / ABS (≤150 mm) ≥ 690 770 / 940 ≥ 14 46 / 32 69 / 48 /

For more technical details :

 

SuperElso® 690CR

Download the complete datasheet


Technical data and information are to the best of our knowledge at the time of publication. However, they may be subjected to some slight variations due to our ongoing research programmes. Therefore, we suggest that information be verified at time of enquiry or order. Furthermore, in service, real conditions are specific for each application. The data presented here are for the purpose of description only, and can be considered as guarantees only when written formal approval has been provided by our company. Industeel reserves the right to change its product range at any time without prior notice.