Rolled Steel for Shipbuilding
(Inverted Angles)
Our inverted angles are widely appreciated in the shipbuilding industry as shipbuilding stern frames. Also compliant with PSPC,* and highly rated at shipyards for their work performance.
*PSPC: Performances Standard for Protective Coatings, criteria related to coatings applied to ships set by the International Maritime Organization (IMO).
Shape/Dimensions
◆Cross-section dimensions, cross-sectional area, mass
Standard cross-section dimensions(mm) | Cross-sectional area | Unit mass | ||||
---|---|---|---|---|---|---|
A×B | t1 | t2 | r1 | r2 | (cm2) | (kg/m) |
200×90 200×90 |
8 9 |
14 14 |
14 14 |
7 7 |
27.80 29.66 |
21.8 23.3 |
200×91 |
10 |
14 |
14 |
7 |
31.66 |
24.8 |
250×90 250×90 250×90 250×90 250×90 |
9 9 10 11 12 |
14 15 15 16 16 |
17 17 17 17 17 |
8.5 8.5 8.5 8.5 8.5 |
34.31 35.12 37.47 40.61 42.95 |
26.9 27.6 29.4 31.9 33.7 |
300×90 300×90 300×90 300×90 |
10 11 12 13 |
16 16 17 17 |
19 19 19 19 |
9.5 9.5 9.5 9.5 |
43.38 46.22 49.84 52.67 |
34.1 36.3 39.1 41.3 |
◆Type, class, material code
Type | Class | Material code | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
NK | LR | DNV | BV | ABS | KR | GL | CCS | CR | ||
Mild steel | Grade A steel | KA |
A |
NV A |
A |
A |
A |
GL-A |
A |
A |
Grade B steel | KB |
B |
NV B |
B |
B |
B |
GL-B |
B |
B |
|
Grade D steel | KD |
D |
NV D |
D |
D |
D |
GL-D |
D |
D |
|
Grade E steel | KE |
E |
- |
E |
E |
E |
- |
E |
E |
|
High tensile strength steel |
32-kg grade steel |
KA32 |
AH32 |
NV A32 |
AH32 |
AH32 |
AH32 |
GL-A32 |
AH32 |
AH32 |
36-kg grade steel |
KA36 |
AH36 |
NV A36 |
AH36 |
AH36 |
AH36 |
GL-A36 |
AH36 |
AH36 |
◆Chemical composition
Type | Material code |
Deoxidization | Chemical composition (%) | |||||
---|---|---|---|---|---|---|---|---|
C | Si | Mn | P | S | Cu | |||
Mild steel | KA | Killed |
0.21 |
0.50 |
2.5×C |
0.035 |
0.035 |
- |
KB | 0.21
|
0.35 |
0.80 |
|||||
KD | 0.60 |
|||||||
KE | Fine grain killed |
0.18 |
0.70 |
|||||
High tensile strength stee |
KA32 | Fine grain killed |
0.18 |
0.50 |
0.90~1.60 |
0.035 |
0.035 |
0.35 |
KD32 | ||||||||
KE32 | ||||||||
KA36 | ||||||||
KD36 | ||||||||
KE36 |
Type | Material code |
Deoxidization | Chemical composition (%) | Carbon equivalent (%) |
||||||
---|---|---|---|---|---|---|---|---|---|---|
Cr | Ni | Mo | T・AL | Nb | V | Ti | ||||
Mild steel | KA | Killed |
- |
- |
- |
- |
- |
- |
- |
- |
KB | ||||||||||
KD | ||||||||||
KE | Fine grain |
0.020 |
||||||||
High tensile strength stee |
KA32 | Fine grain |
0.20 |
0.40 |
0.080 |
0.020 |
0.020~0.050 | 0.050~0.100 | 0.020 or lower |
0.36 or lower |
KD32 | ||||||||||
KE32 | ||||||||||
KA36 | ||||||||||
KD36 | ||||||||||
KE36 |