RINA FH36 FH40 Steel Plate
FH36 shipbuilding steel plate: F indicates the quality grade of high strength hull structural steel. Hull structural steel is divided into general-strength structural steel and high-strength structural steel, general-strength hull steel is divided into four quality grades A, B, D, E; high-strength hull structural steel is a combination of four quality grades (A, D, E, F) and three strength levels (32, 36, 40).
RINA FH36 FH40 Steel Plate can be divided into general strength structural steel and high strength structural steel plate according to its yield strength.
FH40 steel plates for shipbuilding mechanical property
RINA FH40 shipbuilding steel composition (%)
|
|
C max |
Si max |
Mn |
P max |
S max |
Als min |
Ti max |
Cu max |
Cr |
Ni |
Mo |
Nb |
V |
N max |
|
FH40 |
0.16 |
0.50 |
0.90-1.60 |
0.025 |
0.025 |
0.015 |
0.02 |
0.35 |
0.20 |
0.80 |
0.08 |
0.02-0.05 |
0.05-0.10 |
0.009 |
Note: Generally speaking CE will be ≤ 0.40%. If the delivery condition is TMPC, the CE will be : ≤ 0.36% (thickness ≤ 50mm), ≤0.38%( when the thickness >50-100). Ceq% =(C+Mn)/6+(Cr+Mo+V)/5+(Ni+Cu)/15.
RINA FH40 shipbuilding steel mechanical property
|
|
Rm |
Re(MPa) min |
A% min |
Akv/J min |
||||||
|
FH40 |
510-660 |
390 |
20 |
E.T °C |
Thickness (mm) |
|||||
|
-40 |
≤ 50 |
>50-70 |
>70-100 |
|||||||
|
L |
C |
L |
C |
L |
C |
|||||
|
41 |
27 |
- |
||||||||
Note: In the list, Rm: tensile strength, Re: Yield strength, A%: elongation, E.T: experimental temperature, L: lengthways, C: crosswise.
RINA FH40 shipbuilding steel deliver condition
|
|
Fine grains elements |
category |
The thickness of steel |
|||||
|
≤ 12 |
>12.5-20 |
>20-25 |
>25-35 |
>35-50 |
>50-100 |
|||
|
FH40 |
Any |
Plate/sheet |
N,TM,Q&T |
- |
||||
|
Profile steel |
N(25),TM(25),Q&T(25) |
|||||||
Note: 1. delivery condition: A =Any; N=Normalized; CR=Control Rolled; TM=TMPC, Temperature - deformation control rolling; AR*= Can be hot rolled with the agreement of Classification Society ; CR*=Can be control rolled with the agreement of Classification Society.
2. The Figure in the ( ) means the sampling volume to do the impact test, the unit is Ton.(-) means without impact test.
|
Equivalent steel grade of RINA/FH40 |
|||||||
|
DNV |
GL |
ABS |
BV |
CCS |
NK |
KR |
LR |
|
NV F40 |
GL-F40 |
AB/FH40 |
BV/FH40 |
CCS/F40 |
K F40 |
R F40 |
LR/F40 |
FH36 shipbuilding plate
RINA FH36 shipbuilding steel composition (%)
|
|
C max |
Si max |
Mn |
P max |
S max |
Als min |
Ti max |
Cu max |
Cr |
Ni |
Mo |
Nb |
V |
N max |
|
FH36 |
0.16 |
0.50 |
0.90-1.60 |
0.025 |
0.025 |
0.015 |
0.02 |
0.35 |
0.20 |
0.80 |
0.08 |
0.02-0.05 |
0.05-0.10 |
0.009 |
Note: Generally speaking CE will be ≤ 0.40%. If the delivery condition is TMPC, the CE will be : ≤ 0.36% (thickness ≤ 50mm), ≤0.38%( when the thickness >50-100). Ceq% =(C+Mn)/6+(Cr+Mo+V)/5+(Ni+Cu)/15.
RINA FH36 shipbuilding steel mechanical property
|
|
Rm |
Re(MPa) min |
A% min |
Akv/J min |
||||||
|
FH36 |
490-630 |
355 |
21 |
E.T °C |
Thickness (mm) |
|||||
|
-60 |
≤ 50 |
>50-70 |
>70-100 |
|||||||
|
L |
C |
L |
C |
L |
C |
|||||
|
34 |
24 |
- |
- |
- |
- |
|||||
Note: In the list, Rm: tensile strength,Re: Yield strength, A%: elongation, E.T: experimental temperature, L: lengthways, C: crosswise.
RINA FH36 shipbuilding steel deliver condition
|
|
Fine grains elements |
category |
The thickness of steel |
||||||
|
≤ 12 |
>12.5-20 |
>20-25 |
>25-35 |
>35-50 |
>50-100 |
||||
|
FH36 |
Any |
Plate/sheet |
N,TM,Q&T |
||||||
|
Profile steel |
N(25), TM(25), Q&T(15), CR*(25) |
- |
|||||||
Note: 1. delivery condition: A =Any; N=Normalized; CR=Control Rolled; TM=TMPC, Temperature - deformation control rolling; AR*= Can be hot rolled with the agreement of Classification Society ; CR*=Can be control rolled with the agreement of Classification Society.
2. The Figure in the ( ) means the sampling volume to do the impact test, the unit is Ton.(-) means without impact test.
Comparison with other RINA steel grades
RINA classifies high-strength shipbuilding steels into grades AH, DH, EH, and FH, based on their minimum impact testing temperature.
A-grades are tested at 0°C.
D-grades are tested at -20°C.
E-grades are tested at -40°C.
F-grades (FH36, FH40) are tested at -60°C, indicating very high toughness in extremely low temperatures.
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