In DNV classification society, ordinary strength structural marine steel grades contain DNV Grade A, DNV Grade B,DNV Grade D and DNV Grade E steel. High strength structural shipbuilding steel grades are DNV Grade AH32, Grade AH36, GRADE AH40, Grade DH36,Grade DH40,GRADE FH32, DNV GRADE FH36 and Grade FH40. DNV shipbuilding steels have been engineered to be optimal long-lived shipbuilding steels. DNV Grade A and Grade B shipbuilding steel plates are mainly used for making the offshore oil drilling platform, the hull of ship building and ship repairing, the platform pipe joints and other components.
Now we analysis the ordinary strength marine steel grades propertiesas belows:
| Grade | DNV Grade A | DNV Grade B | DNV Grade D | DNV Grade E | |
| Yield Strength(Mpa) | 235 |
235 |
235 |
235 |
|
| Tensile Strength(Mpa) | 400-520 |
400-520 |
400-520 |
400-520 |
|
| Impacting Test temperature (℃) | 20 |
0 |
-20 |
-40 |
|
| Chemical Composition % ≤ |
C |
0.21 |
0.21 |
0.21 |
0.18 |
Mn(≥) |
2.5*C |
0.80 |
0.60 |
0.70 |
|
P |
0.035 |
0.035 |
0.035 |
0.035 |
|
S |
0.035 |
0.035 |
0.035 |
0.035 |
|
Si |
0.50 |
0.35 |
0.10- 0.35 |
0.10- 0.35 |
|
Al (acid) |
0.035 |
0.035 |
0.035 |
0.035 |
|
| H:Heat Analysis. P:Product Analysis | DNVA |
DNVB |
DNVD |
DNVE |
|
We can supply ordinary strength marine steel grade DNV Grade A,DNV Grade B, DNV Grade D and DNV Grade E steel plates with DNV certification(Det Norske Veritas). Due to the merging of DNV and GL certification, now DNV Grade A steel plates are certificated by DNVGL association. Find more details of shipbuilding steel from Katalor Industry for now.
