HIC-resistant steel plates for pressure vessels
1. Features
- 400 to 600 N/mm2 class steel plates for pressure vessels
contributing to the prevention of hydrogen-induced cracking due to hydrogen sulfide corrosion.
- Capable of withstanding wet and hydrogen sulfide environments of BP and NACE grades.
2. Major corresponding standards
- JIS G3106 (Rolled Steel for Welding Structures) SM400A, B, C SM490A, B, C SM570Q
- SM400A, B, C SM490A, B, C SM570Q
- JIS G3103 (Carbon Steel and Molybdenum Alloy Steel Plates for Boilers and Pressure Vessels)
- JIS G3115 (Steel Plates for Pressure Vessels for Intermediate Temperature Service)
- SPV235 SPV315 SPV355Q SPV450Q SPV490Q
- JIS G3118 (Carbon Steel Plates for Pressure Vessels for Intermediate and Moderate Temperature Services)
3. Applications
- Applications to refineries and pipelines of petroleum and natural gas in wet hydrogen sulfide environments can be expected.
4. Typical characteristics
Table 1 Chemical compositions and HIC test results of HIC resistant steel plates
| Classifi-
cation |
JIS
Grade |
Manufac-
turing
Process |
Thickness
mm |
Grade
of HIC
Resistance |
Chemical Composition ％ |
Ceq1）
％ |
HIC Test Resuls |
| BP Test |
NACE Test |
| C |
Si |
Mn |
P |
S |
Others for
Improvement in HIC Resistance |
CLR2）％ |
CSR3）％ |
CLR |
CSR |
| HIC Resisitant Steel |
SM400C |
As Rolled |
20 |
BP |
0.12 |
0.24 |
0.66 |
0.013 |
0.002 |
Cu,Ti,Ca,REM |
0.24 |
0 |
0 |
14.8 |
0.6 |
| SM490C |
As Rolled |
24 |
NACE |
0.11 |
0.27 |
1.21 |
0.010 |
0.002 |
Ti,Ca |
0.33 |
0 |
0 |
0 |
0 |
| SM570Q |
Quenched and Tempered |
29 |
NACE |
0.12 |
0.25 |
1.18 |
0.010 |
0.001 |
Ti,Ca |
0.36 |
0 |
0 |
0 |
0 |
| SGV410 |
Normalized |
45.5 |
NACE |
0.09 |
0.30 |
1.19 |
0.009 |
0.002 |
Ti,Ca |
0.31 |
0 |
0 |
0 |
0 |
| SGV480 |
Normalized |
15 |
NACE |
0.17 |
0.25 |
0.87 |
0.008 |
0.001 |
Ti,Ca |
0.37 |
0 |
0 |
0 |
0 |
| Ordinary Steel |
SM400B |
As Rolled |
25 |
- |
0.14 |
0.22 |
1.14 |
0.017 |
0.006 |
- |
0.34 |
86.0 |
4.6 |
96.5 |
4.9 |
| SM490B |
As Rolled |
25 |
- |
0.16 |
0.44 |
1.37 |
0.020 |
0.005 |
- |
0.41 |
68.5 |
2.2 |
71.0 |
3.3 |
Note 1) Ceq=C+Si/24+Mn/6+Ni/40+Cr/5+Mo/4+V/14% 2) CLR : Crack length ratio 3) CSR : Crack sensitivity ratio
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