KR Grade A is the general strength hull structural steel, with it's good toughness properties, higher strength,strong corrosion-resistance, the processing properties, and welding properties. In the steel standard ASTM A131/A131M, offshore steel grade ASTM
A131 Grade A is the best equvialent steel grade with KR Grade A.
KR Grade A Steel Plates Equivalent
| DNV |
GL |
LR |
BV |
CCS |
NK |
KR |
RINA |
| NV AH36 |
GL AH36 |
LR/AH36 |
BV/AH36 |
CCS/AH36 |
K AH36 |
R AH36 |
RI AH36 |
KR Grade A Steel Plates for Hull Structures’ chemical composition
| C |
Si |
Mn |
P |
S |
Al |
N |
| 0.18 |
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 |
Mechanical properties of KR Grade A Steel Plates for Hull Structures
| Yield strength |
Tensile strength |
Elongation |
| Min Mpa |
Mpa |
Min % |
| 355 |
490-620 |
21 |
The general grades A, B, D, and E are distinguished according to the impact temperature of the steel. The impact values of all grades of steel are the same. The KR Grade A
shipbuilding steel plates can meet the requirements of process and mechanical properties through ordinary rolling, so the production process is relatively simple.
