What is NVE690 marine engineering steel

NVE690 marine engineering steel is produced by adding appropriate amount of Ni, Cr, Mo and other alloying elements to enhance its vitality and ensure its good hardenability. It is mainly made of tempered sorbite. NVE690 steel is generally delivered in quenched and tempered state.

Chemical composition of NVE690 marine engineering steel (element composition: %):
Carbon C: 0.42-0.50, Silicon Si: 0.17-0.37, Manganese Mn: 0.70-1.00,
Sulfur S: ≤0.035, Phosphorus P: ≤0.035,
Chromium Cr: ≤0.25, Nickel Ni: ≤0.25, Copper Cu: ≤0.25

Mechanical properties of NVE690 marine engineering steel:
Tensile strength σb (MPa): ≥620(63)
Yield strength σs (MPa): ≥375(38)
Elongation δ5 (%): ≥15
Reduction of area ψ (%): ≥40
Impact energy Akv (J): ≥39
Impact toughness value αkv (J/cm2): ≥49(5)
Hardness: unheated ≤241HB, annealed steel ≤217HB

NVE690 marine engineering steel is widely used in the manufacture of main hulls of marine engineering ships, offshore drilling platforms and oil production platforms, drilling platforms, pile boots, cantilever tracks, pile legs, racks and semi-circular plates.