RINA D420 are specialized grades of shipbuilding steel plates that are renowned for their exceptional strength, durability, and corrosion resistance. These steel grades are certified by the Italian Register of Shipping and Naval Architecture (RINA) and are widely used in the construction of various marine vessels.
The chemical composition of RINA D420 steel plates is carefully balanced to achieve optimal performance. The main elements include carbon, silicon, manganese, phosphorus, sulfur, chromium, molybdenum, nickel, and copper. This composition ensures high tensile strength, good welding characteristics, and resistance to corrosion in marine environments.
|
Element |
RINA D420 Max % |
Element |
RINA D420 Max % |
|
C |
0.20 |
Ni |
0.40 |
|
Mn |
1.70 |
Mo |
0.08 |
|
Si |
0.10-0.55 |
Al |
0.020 min |
|
S |
0.030 |
Nb |
0.20-0.05 |
|
P |
0.030 |
V |
0.05-0.10 |
|
Cu |
0.35 |
Ti |
0.0007-0.05 |
|
Cr |
0.20 |
N |
|
Crack Sensitivity: Pcm = (C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B)%
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
In terms of mechanical properties, RINA D420 steel plates exhibit excellent yield strength and tensile strength, making them suitable for withstanding the rigorous demands of the marine industry. They also possess good impact toughness, which is essential for maintaining the structural integrity of ships in extreme conditions.
|
Grade |
Thickness |
Yield Strength |
Tensile Strength |
Elongation |
Impact Energy |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
|
|
|
|
|
|
-20 degree |
|
|
RINA D420 |
8-260 |
420 |
530-680 |
18 |
28J |
Note: the impact energy under less 150mm thickness; longitudinal min impact energy
The heat treatment state of RINA D420 steel plates is carefully controlled to optimize their mechanical properties. Typically, these steel plates undergo normalizing or quenching and tempering processes to achieve the desired strength and toughness.
Regarding size range, RINA D420 steel plates are available in a variety of thicknesses, widths, and lengths to cater to different shipbuilding needs. This flexibility allows for the efficient and cost-effective construction of various marine vessels.
Impact tests are conducted on RINA D420 steel plates to ensure their ability to withstand low-temperature conditions. These tests assess the steel's toughness and resistance to cracking under impact loads at low temperatures, ensuring safety and reliability in extreme marine environments.
The main application scenarios for RINA D420 steel plates include the construction of hulls, decks, and other structural components of ships and marine vessels. They are particularly suitable for use in vessels that require high strength and corrosion resistance, such as cargo ships, tankers, and cruise ships.
