BV AH40 marine steel plates specifically designed for use in the shipbuilding industry. These grades offer excellent strength, toughness, and weldability, making them suitable for various critical applications in offshore and marine structures.
BV AH40 high Strength Chemical Composition in Tempering and Quenching | |||||||
Grade | The Element Max (%) | ||||||
C | Si | Mn | P | S | Al | N | |
BV AH40 | 0.18 | 0.1-0.50 | 0.90-1.6 | 0.035 | 0.035 | 0.015 |
|
Nb | V | Ti | Cu | Cr | Ni | Mo | |
0.02-0.05 | 0.05-0.10 | 0.02 | 0.35 | 0.2 | 0.4 | 0.08 | |
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】%
BV AH40 high strength property in tempering and quenching | |||||||
Grade |
| Mechanical Property | Charpy V Impact Test | ||||
Thickness | Yield | Tensile | Elongation | Degree | Energy 1 | Energy 2 | |
BV AH40 | mm | Min Mpa | Mpa | Min % | 0 | J | J |
t≤50 | 390 | 510-660 | 20% | 26 | 39 | ||
50＜t≤70 | 390 | 510-660 | 20% | 31 | 46 | ||
70＜t≤100 | 390 | 510-660 | 20% | 37 | 55 | ||
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal | |||||||
Heat Treatment
BV AH40 steel plates undergo controlled heat treatment to ensure optimal mechanical properties and microstructure. This heat treatment involves heating the steel to a specific temperature, holding it for a period, and then cooling it at a controlled rate. This process helps in achieving the desired strength, toughness, and weldability of the steel plates.
Impact Testing
Impact testing is a crucial aspect of BV AH40 steel plates, especially for offshore applications. These steel plates are tested to assess their ability to resist sudden impact loads, such as those encountered during collisions or extreme weather events. Impact tests are conducted at specified temperatures to ensure the steel plates maintain their structural integrity even under severe conditions.
Primary Applications
BV AH40 steel plates find widespread application in the shipbuilding industry, particularly in the construction of offshore structures like oil and gas platforms, cargo ships, and cruise liners. Their excellent strength, toughness, and weldability make them ideal for use in these demanding environments, where safety and reliability are paramount.
